Cam-to-valve relationship

The gasoline engine torque regulator described herein provides means of reducing the quantities of harmful oxides of nitrogen emitted via the exhaust of a four stroke cycle gasoline engine and also of increasing the efficiency of the engine at part load. These beneficial objects are achieved by adjustably...     

A hydraulic lifter assembly for adjusting the opening movement of engine valves by push rods actuated by the engine cam shaft is completely self-contained as a unit which may be quickly installed or replaced when necessary. The valve lifter assembly is totally enclosed, so that oil is sealed in the housing...     

A valve control mechanism for effecting split engine operation of an internal combustion engine, the engine being of the overhead valve type in which each valve is actuated by a rocker arm fulcrumed intermediate its ends on a semi-spherical pivot bearing positioned on a mounting stud fixed to the cylinder...     

A mechanical valve lifter including a cup member adapted to fit over the end of a valve stem, the cup member having a boss therein with an axial bore extending from one end thereof and a threaded bore extending radially from the exterior of the cup member to intersect the bore in the boss, an elastomer...     

Variable overlap of the intake and exhaust valve opening periods for an internal combustion engine is obtained by providing a speed responsive yieldable link in the valve actuating mechanism that varies the effective valve lift with engine speed. The variation is accomplished by flow responsive valves,...     

An internal combustion engine comprises a cylinder, a piston displaceable therein, a control member movable to control the engine output, means including an intake valve for effecting the induction of a fuel-air mixture into the cylinder, timing means including a main cam shaft having a cam for opening...     

A tappet or valve lifter is used in an internal combustion engine. The operation of the tappet is hydraulically controlled to selectively stop or start the operation of the engine combustion chamber poppet valve. Tappets may be included in both the intake system and the exhaust system of each cylinder.

A variable control mechanism for regulating the opening of an engine valve during each cycle of operation is disclosed. The control mechanism essentially includes hydraulic restraint means which control the relationship between camshaft movement and valve opening in an operating train wherein rotary...     

A piston-type internal combustion engine is described including a variable valve timing device controlling the timing of the intake valve, a coupling between the accelerator pedal and the variable timing device for varying the timing of the intake valve in response to the movement of the accelerator...     

An engine valve control mechanism for varying the amount of opening and/or timing of cylinder valve in a valve gear train of a multi-cylinder, internal combustion engine having an overhead camshaft which actuates the valve via a rocker arm pivotally bridged between the valve stem and a hydraulic lash...     

A variable control mechanism for regulating the opening of an engine valve during each cycle of operation is disclosed. The control mechanism essentially includes hydraulic restraint means which control the relationship between camshaft movement and valve opening in an operating train wherein rotary...     

A device for disabling a poppet valve in an internal combustion engine. The engine includes a valve actuating drive train having an overhead camshaft, a hydraulic lash adjuster, and a rocker arm which pivots at one end about the lash adjuster. The disabling device is secured to the valve stem and is...     

An engine valve control mechanism for varying the amount of opening and/or timing of a cylinder valve in a valve gear train of a multi-cylinder, internal combustion engine having an overhead camshaft which actuates the valve via a rocker arm pivotally bridged between the valve stem and a hydraulic lash...     

A cylinder deactivator system for an internal combustion engine having an engine block and head, a plurality of engine cylinders in the block, intake and exhaust valves for each engine cylinder spring-loaded to their closed positions, and a cam operated valve train operating each of the valves. Each...     

Mechanism for varying the timing of the valves of an internal combustion engine to obtain optimum efficiency and performance of the engine throughout a substantial portion of its operating speed range, wherein cam means for at least each intake valve is mounted on a rotatable cam shaft of the engine....     

A device for selectively disabling and enabling, while running, the combustion chamber valves of an internal combustion engine. The device is interposed in engine valve gear of the type employing a plurality of rockers mounted on a common shaft and acted upon by the cyclic application and relaxation...     

An improved valve disabler control for a multi-cylinder engine having individually pivoted rocker arms and an intake and exhaust valve pair for each cylinder. Half of the valve pairs are provided with valve disablers having rotatable sleeves. Rotation of the sleeves counterclockwise (ccw) allows sliding...     

An improved valve selector assembly for selectively enabling and disabling the intake and exhaust valves of one cylinder of an internal combustion engine of the type having individually pivoted rocker arms for opening and closing the valves. Each selector assembly includes two valve disablers (one associated...     

An improved valve selector assembly for selectively enabling and disabling the intake and exhaust valves of one cylinder of an internal combustion engine of the type having individually pivoted rocker arms for opening and closing the valves. Each selector assembly includes two valve disablers (one associated...     

A hydraulic valve lifter for an internal combustion engine is provided with a thin flexible valve disc, with a sharp edge orifice therethrough, that is operative to sense the oil flow rate between a hydraulic supply chamber and a pressure chamber within the lifter whereby to regulate the volume capacity...     

A combustion engine with internal combustion, exhaust gas return and inlet and exhaust systems separate as regards their gas paths, in which the exhaust gas return system is essentially independent in its gas paths from the inlet system.

An improved valve disabler and disabler control for a multi-cylinder engine having individually pivoted rocker arms and an intake and exhaust valve pair for each cylinder. Each intake and exhaust valve of half of the valve pairs is associated with a selectively operable valve disabler. Each disabler...     

An improved valve disabler control for a multi-cylinder engine having individually pivoted rocker arms and an intake and exhaust valve pair for each cylinder. Half of the valve pairs are provided with valve disablers having rotatable sleeves. Rotation of the sleeves counterclockwise (ccw) allows sliding...     

In an internal combustion engine having a rocker arm operated intake valve, there is provided a valve lift adjusting device that adjusts the fulcrum of the rocker arm between a full-lift position producing full valve lift and a partial-lift position producing partial intake valve lift. The valve lift...     

Internal combustion engine valve rocker arms adaptable for changing the horsepower output of an equipped engine, which rocker arms may be alternately set to prevent operation of the valves of cylinders that are to be selectively deactivated. Each rocker arm is formed of two radial members pivotally mounted...     

A variable valve event engine has a plurality of cams with different cam profiles and can vary the operating characteristics of the valve by moving a rocker arm for selectively changing the cams in accordance with changes in the operating conditions of the engine. The engine further includes a spring...     

The actuator disclosed herein uses cyclic forces in a valve gear train of an internal combustion engine to selectively switch a pair of valve disablers between valve enabling and disabling positions. When the disablers are in the valve enabling position, rocker arm fulcrums are latched in a fixed position....     

A valve selector rotary latch mechanism is provided having an improved locating clip (46, 47) for aligning a telescoping spring capsule subassembly (38, 40) relative to the position of a rotary acting blocker plate (41, 42) and a mounting bracket (36) which connects a solenoid actuator (31) through a...     

A valve selector including a telescoping spring capsule subassembly having a dual retainer ring arrangement for limiting the maximum extended length thereof. A cup-shaped spring retaining member has an internal groove formed near its rim and a cup-shaped spring receiving member has an external groove...     

A hydraulic system for actuating gas-change valves in internal combustion engines or compressors wherein the output piston associated with each gas-change valve is capable of being moved against the force of a closing spring through a control circuit filled with control fluid by an input piston operable...     

Disclosed is an improved valve selector assembly (10) for enabling and disabling the intake and exhaust valves of a cylinder of an internal combustion engine of the type having rocker arms (12 and 14) for opening and closing the valves in response to periodic forces pivoting the rocker arms about fulcrums...     

An engine retarder brake for operating a valve in the combustion chamber of an internal combustion engine near the end of the exhaust stroke to thereby discharge compressed air and cause the engine to operate as a brake for the vehicle.

A device for disabling a poppet valve in an internal combustion engine. The engine includes a valve actuating drive train having an overhead camshaft, a hydraulic lash adjuster, and a rocker arm which pivots at one end about the lash adjuster. The disabling device is secured to the valve stem and is...     

A valve control mechanism for effecting split engine operation of an internal combustion engine of the overhead valve type in which each valve is actuated by a rocker arm normally fulcrummed intermediate its ends on an apertured pivot bearing slidably supported on a mounting stud fixed to the cylinder...     

A decompression device for an internal combustion engine having a camshaft (4) with at least one cam (21) having a base circle (20) and a lobe elevated therefrom, a valve acting at a combustion chamber, and a transmitting member, e.g., a push rod (12), transmitting the lift of the cam (21) to the valve,...     

A hydraulic valve lift device for transmitting the motion of a cam to a push rod of an intake or exhaust valve of an engine, including a housing, a lifter slidably engaged by the housing and provided therein with an oil pressure chamber adapted to receive an oil, and a plunger provided with a flange...     

A variable valve event engine has a plurality of cams with different cam profiles and can vary the operating characteristics of the valve by moving a rocker arm for selectively changing the cams in accordance with changes in the operating conditions of the engine. The engine further includes a spring...     

A valve selector including a telescoping spring capsule subassembly having a dual retainer ring arrangement for limiting the maximum extended length thereof. A cup-shaped spring retaining member has an internal groove formed near its rim and a cup-shaped spring receiving member has an external groove...     

A valve disabling and switch mechanism for a multi-cylinder internal combustion engine is disclosed. One embodiment of the disabling mechanism is for an individually pivoted rocker arm; this disabling mechanism includes means which allow sliding movement of the rocker arm fulcrum to disable the valve,...     

A valve opening control device for use with an internal combustion engine having cam-operated cylinder valves comprises a cam-like member having a cylindrical surface concentric with a shaft about which the member rotates and a cam-like section extending tangentially therefrom. The control device shaft...     

A valve train for an internal combustion engine that permits adjustment during running of the valve events. This is achieved by a follower having a pair of follower surfaces which may be moved while the engine is running to control both the point of opening and independently the point of closing of each...     

A pressure limiting expandable hydraulic tappet is provided for use in an internal combustion engine to selectively vary timing by altering the effective profile of a camshaft. The tappet expands to extend the drive train between the camshaft and a camshaft operated mechanism by enlarging and filling...     

Hydro-mechanical brake timing means are provided to control the timing of an engine braking system of the gas compression type for an internal combustion engine wherein the engine braking system includes a hydro-mechanical mechanism which opens the exhaust valve near the top of the compression stroke...     

An hydraulic reset mechanism is provided for an engine retarder of the compression relief type. The mechanism senses the force required to hold open an exhaust valve. When this force has decreased substantially from the force required to open the exhaust valve initially, a valve is opened in the hydraulic...     

A hydraulic valve lift device for internal combustion engines includes a lifter having therein an oil pressure chamber for introduction of oil and slidably disposed in a cylindrical bore of a housing with one end thereof engaged by a cam on a cam shaft, and a plunger slidably disposed in the lifter for...     

A cylinder deactivation device includes a stud rigidly engaged with the head of an internal combustion engine, a rocker arm, a rocker ball, a stand element attached to the upper end of the stud, a cylindrical sleeve having an interior ridge in the inner wall thereof, and a compression spring for exerting...     

The invention concerns a rocker mechanism designed to put out of use at least one cylinder, or a group or row of cylinders, of an internal combustion engine by acting on the inlet valve. The mechanism includes at least one rocker comprised of two components meshed with one another, one of those components...     

An automotive engine having an automatically adjusted geometric compression ratio, wherein the charge is compressed to maximum permissible values under all throttle settings. This is achieved by a cylindrical valve carrier, raised or lowered by a screw jack, while valve stem contact is maintained by...     

A hydraulic valve lift device for internal combustion engines includes a lifter having therein an oil pressure chamber for introduction of oil and slidably disposed in a cylindrical bore of a housing with one end thereof engaged by a cam or a cam shaft, and a plunger slidably disposed in the lifter for...     

A centrifugally responsive compression release mechanism for an internal combustion engine. The release mechanism includes a yoke pivotally mounted to the camshaft and having an auxiliary cam member that is movable between an operative valve-unseating position and an inoperative position. A counterweight...     

An improved compression release engine braking system is provided for internal combustion engines having two exhaust valves associated with each cylinder. The slave piston of the compression release brake is relocated so as to register with one of the two exhaust valves and the crosshead assembly is...     

A rocker arm mechanism is mounted on a rocker shaft via a pair of eccentric bushes, which, when made to rotate in opposite directions, disengage the rocker arm from an associated valve. The device is useful in controlling the number of operating cylinders in a multi-cylinder engine for more efficient...     

A rocker arm adapter for use in the timing mechanism of an internal combustion engine is disclosed. The adapter is a method for altering the cam profile of the exhaust valve of the engine with respect to the intake valve. It includes a fluidic delay device mounted in either the first end or the second...     

The present invention relates to a multi-cylinder internal combustion engine which may be used for the automobile and the like. The multi-cylinder internal combustion engine comprises at least one cylinder which can be rendered inoperative while the rest of cylinders are operating and a controlling means...     

A mechanism for varying the lift and duration of lift of the valves (1) of an internal combustion engine comprises a primary hydraulic cam follower (4) actuated by a primary cam (5), a secondary hydraulic cam follower (8) actuated by a secondary cam (7), a housing (18) for the secondary cam follower...     

Adjustments to the amount of valve lift in an engine are readily made by corresponding adjustments to the location at which a cam actuated push rod contacts the push rod side of the valve actuating rocker arm. The invention provides an accurate and rapid means for adjusting the push rod contact position...     

A valve actuating apparatus for an internal combustion engine having selectively energizable intake/exhaust valves. Oil is supplied to valve actuators which perform the selective energization of the valve through a spool valve. The spool valve has a bypass for supplying operating oil to the actuators...     

A control system for an internal combustion engine is described which allows the engine to be started and stopped while unloaded. The invention incorporates the mechanical linkage operated by a solenoid to control a valve at the interior of the engine and an electronic circuit incorporating one or more...     

A tappet with an off-center cam following surface offers a means for adjusting the timing of valves, etc., in a cam timing device. For the timing of the valve train in an internal combustion engine, the tappet offers a high degree of flexibility in adjusting the timing.

Process and apparatus for the compression release retarding of a multi-cylinder four cycle internal combustion engine are provided. The process provides a compression release event and a bleeder event or a second compression releaser event for each engine cylinder during each complete engine cycle while...     

This invention relates to improvements in engines of the reciprocating piston type, especially reciprocating piston internal combustion engines suitable for stationary and non-stationary uses. The pistons of the engine are operatively connected to the drive shaft of the engine via an elongated gear-roller...     

An engine valve timing control system using electrohydraulic valve lifters or adjusters operatively connected to a microprocessor based electronic control unit will provide real time charges in engine valve timing. As a result, engine performance will be improved over the mechanically controlled engine...     

An engine valve train system for selectively effecting operation of a pair of side by side valves of a cylinder and to effect deactivation of one of the valves in the pair during predetermined modes of engine operation includes first and second rocker arms pivotably supported on a hollow rocker shaft...     

A method of optimizing valve timing events for a modern high speed internal combustion engine for the purpose of improving fuel economy during idle, high speed performance and allowing for a leaner fuel/air ratio during idle. The method is based on an analytical treatment of the instantaneous relationship...     

A variable valve lift and timing valve train mechanism includes a rocker arm having one end thereof operatively engaging a valve and its opposite end being engaged by a valve actuator, the upper surface of the rocker arm intermediate its ends having a predetermined cam surface profile which is adapted...     

An anti-lash adjuster for compression relief brakes on internal-combustion engines. The anti-lash adjuster has a slave piston adapted to contact the valve-actuating mechanism for the exhaust valves. The slave piston has a predetermined surface area and a retracting spring which biases the slave piston...     

A valve control arrangement for internal combustion engines with reciprocating pistons, comprises a housing having a housing opening, a valve piston axially displaceable in the housing opening, a valve closing spring, a valve plunger on which the valve piston acts against the valve closing spring, a...     

A decompression apparatus for an engine has a valve releasing lever comprising a shaft and a weight secured to the shaft. The shaft has a large diameter portion, reduced portion formed in the large diameter portion, small diameter portion adjacent the reduced portion. A cam gear formed on a camshaft...     

In an internal combustion engine having a rocker arm provided at one end with a roller contacting an exhaust valve stem for opening the valve, the rocker arm end portion is transversely slotted longitudinally normal to the axis of the valve stem to provide a longitudinally adjustable exhaust valve operating...     

A decompression apparatus for an engine has a valve releasing lever comprising a shaft and a weight secured to the shaft. The shaft forms a semicircular cam at its one end. Recesses are provided on a camshaft and a bore of a cam gear, and a key is engaged in both recesses to secure the camshaft and the...     

Apparatus is disclosed for employing the compression cycle of a four-cycle internal combustion engine as means for achieving braking of a vehicle driven by said engine. The invention relates to an improved hydraulically activated relief brake utilizing an exhaust valve associated with each cylinder of...     

A valve deactivator mechanism includes a flanged valve actuator that is operatively connected to a conventional spring biased poppet valve, either intake or exhaust, and which is slidably received in a flanged cam follower adapted to be reciprocated by an engine driven camshaft, a spring being operatively...     

A variable ratio rocker arm is provided for use in combination with the valve stem and push rod of an internal combustion engine. The rocker arm has an elongated slot defined between a rod seat and a toothed rack. A fulcrum rod is provided with a toothed sector and a curved sector, with the toothed sector...     

A variable valve lift and timing valve train mechanism includes a rocker arm having one end thereof operatively engaged by a valve actuator, a reaction member having one end thereof engaging an eccentric which can be rotated to change the angular position of the reaction member; a hydraulic lash adjuster...     

An engine valve control mechanism (12) for varying the amount of opening and/or timing of a cylinder valve (16) in a valve gear train (14) of a multi-cylinder, internal combustion engine having an overhead camshaft (24) which actuates the valve via a rocker arm (18) pivotally bridged between a valve...     

A valve control arrangement for controlling closing and opening time of a valve actuatable by a valve control cam of a cam shaft via an axially displaceable valve plunger, in a displacement piston-internal combustion engine, the valve control arrangement comprises a stroke transmitting chamber between...     

A variable valve lift and timing valve train mechanism includes a rocker arm having one end thereof operatively engaging a valve and its opposite end being engaged by a valve actuator, the upper surface of the rocker arm intermediate its ends having a predetermined cam surface profile which is adapted...     

This invention relates to improvements in engines of the reciprocating piston type, especially reciprocating piston internal combustion engines suitable for stationary and non-stationary uses. The pistons of the engine are operatively connected to the drive shaft of the engine via an elongated gear-roller...     

Hydraulic engine valve lifter includes a pair of pistons defining a pressure chamber therebetween and a separate lash adjusting piston which defines a lash adjustment chamber with one of the pistons in the pair. One-way valve structures permit fluid to flow from the pressure chamber into the lash adjustment...     

According to the present invention there is provided a poppet valve assembly comprising a plurality of simultaneously operated poppet valve members slidably mounted for movement between their open and closed positions by their stems the axes of which are not all parallel, a rocker mounted for rocking...     

In an internal combustion engine having a cam on a cam shaft and a valve operated thereby, valve opening duration is decreased or increased and valve opening is performed earlier or later by shifting the lifter relative to the line of cam action so that it is acted on earlier or later by the cam.

A variable ratio rocker arm is provided for use in combination with the valve stem and push rod of an internal combustion engine. The rocker arm has a toothed rack. A fulcrum rod is provided with a toothed sector and a curved sector. A stationary support member has an elongated slot defined between a...     

A cam mechanism includes a cam of basic circular formation and having a lobe formation extending radially outwardly along part of its periphery; and a cam follower mounted for reciprocating movement along an axis perpendicular to the axis of rotation of the cam; the cam acting against an end face of...     

Control apparatus for an intake valve and/or an exhaust valve which are slidably mounted for reciprocating movement relative to a valve seat in a cylinder head including an electromagnetic solenoid fixed to the cylinder head and a magnetic pole fixed to at least one of the valves with the magnetic pole...     

A valve control system particularly adapted to engines having four valves per engine cylinder, the valve system including an electronically controlled valve lifter that operates in conjunction with the actuating cam enabling the effective timing and displacement of the valve to be varied within certain...     

An anti-lash adjuster for compression relief brakes on internal-combustion engines. The anti-lash adjuster has a slave piston adapted to contact the valve-actuating mechanism for the exhaust valves. The slave piston has a predetermined surface area and a retracting spring which biases the slave piston...     

A valve mechanism includes a poppet type valve, a valve lever pivotally mounted at one end and attached at the other end to the end of the stem of the valve, the valve lever defines a track in which is located a drive pin and a drive mechanism is arranged to drive the drive pin in oscillatory manner;...     

A mechanism to vary the lift of a valve of an internal combustion engine, the valve being operated by a cam lobe on a cam shaft. A lever is pivoted to a support rotatable about the cam shaft, the cam lobe acting on a shaped bearing area on the lever, the other side of the lever contacting the cam follower,...     

A fuel control apparatus is provided for an engine which is primarily used for a vehicle so as to permit the changing of a valve opening-closing timing and/or a valve lift amount for a valve on at least one of an intake side and an exhaust side. Accordingly, to the present invention, the fuel supply...     

An engine control apparatus wherein an engine output can be adjusted in accordance with an allowable revolution speed of the engine at each valve timing so that while the engine can operate at a revolution speed of up to the highest allowable speed range when operating at a valve timing at which the...     

A valve operating mechanism for an internal combustion engine having a plurality of exhaust valves per cylinder comprises a device for driving the exhaust valves in a same cylinder at such a valve timing that makes opening of the exhaust valves with a phase difference, i.e., at different timings relative...     

A variable lift valve train mechanism for an internal combustion engine. The valve train varies valve lift depending on engine RPM, providing a relatively lower valve lift at lower engine RPMs for increased bottom-end torque and a relatively higher valve lift at higher engine RPMs for increased overall...     

An improved compression release engine retarder or engine brake stores hydraulic fluid under pressure and then release the fluid at an appropriate time in each engine cycle to displace a slave piston and thereby open the exhaust valves for compression release. In one aspect of the improved brake, the...     

An engine retarding system of a gas compression release type is provided for an engine equipped with a high pressure hydraulic fluid supply system. The retarder comprises an hydraulically driven exhaust valve actuator, a solenoid actuated servo valve controlling the flow of high pressure hydraulic fluid...     

A valve stem which is located for axial movement; a valve lever is pivotally mounted at one end and is attached adjacent the other end to the end of the valve stem, the valve lever defines a track; a drive pin engages in the track the drive pin being mounted at one end of a first link the other end of...     

A variable valve-timing device for an intake or exhaust valve in a cylinder head of an internal combustion engine operated directly from a camshaft includes a low speed rocker arm mounted on a low speed rocker arm shaft and a high speed rocker arm mounted on a high speed rocker arm shaft. The low speed...     

A mechanism is described for achieving variable lift of a valve of an internal combustion engine having an overhead camshaft disposed above the valves. The mechanism comprises two levers both pivoted about fixed fulcrums and a coupling member which is movable along overlapping arms of the two levers...     

A variable valve timing and lift mechanism consists of low and high speed cams provided in phase on the camshaft of an overhead camshaft engine, the high speed cam having larger lift than the low speed cam although the base circle diameter of the two is the same. The low speed cam is coupled to port...     

A compression relieve type braking apparatus comprising a slave piston, a master piston, a housing defining a first passageway, and a pressure release mechanism. The first passageway interconnects the master piston and the slave piston. The master piston is responsive to the engine cycle in a manner...     

A camshaft has, for each valve lifter, a high lift cam between two low lift cams, the high lift cam fitting within the envelope of the low lift cams. The lifter comprises an outer tappet elongated in the direction of the camshaft and slidably mounted in an elongated bore in a cam carrier. The outer tappet...