With means for varying timing

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...     

Valve opening and closing timing is varied by adjusting the relative angle of the camshaft to the driving crankshaft in dependence on engine load.

A piston-type internal combustion engine includes a variable valve timing device controlling the timing of the intake valve, and 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 pedal, thereby...     

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 timing mechanism actuated by hydraulic fluid uses a means responsive to vacuum to relatively displace a drive member and a driven member. When incorporated in an internal combustion engine for advancing or retarding an engine camshaft with respect to an engine crankshaft, the relative displacement...     

A variable valve timing mechanism for an internal combustion engine including at least one valve-actuating camshaft driven from a crankshft is described. The valve timing mechanism comprises a movable member which is arranged in use to be rotatable by the crankshaft and movable in translation relative...     

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 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...     

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 system for optimizing the number of cylinders operating in a multicylinder engine, during ongoing engine operation. Input circuitry monitors conditions under which the engine is operating and generates corresponding input signals. Logic circuitry, based on such input signals, determines whether to...     

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...     

An internal combustion engine is run at high compression ratios by always starting the compression of the charge at sub-atmospheric pressure, thus allowing high compression ratios without excessive pressure at the end of the compression stroke. Higher compression ratios allow higher expansion ratios...     

This invention relates to hydraulic control of intake valves and fuel injection of spark ignited internal combustion engines to effect a sonic-type induction system. The invention is an extension of a previous application by the same inventor, which provides a hydraulic actuation system for a prescribed...     

An internal combustion engine is so constructed that the timing of the intake and exhaust valves can be changed during operation of the engine making it possible to select the optimum timing for the valves in accordance with the operating conditions. The timing can be changed from the exterior of the...     

A mechanism for stopping operation of a valve, comprising a plunger slidably mounted in a portion of a valve actuating system for actuating the valve, a stopper engageable and disengageable with the plunger to prevent or allow sliding motion of the plunger thereby operating or stopping the valve, and...     

A device for the angular adjustment of a camshaft of a combustion engine according to speed and load conditions and to the angular position of the camshaft with respect to a driving wheel being controlled by an adjustable mechanism. The technical problem is the angular adjustment of the single or multiple...     

In a multi-cylinder internal combustion engine having a plurality of cylinders which are supplied with air via one common throttle valve and a control unit for regulating the number of operating cylinders to rest an arbitrary number of cylinders by blocking the air supply to said cylinders, the output...     

An improved engine retarder of the compression release type in which the exhaust valves are opened near the end of the compression stroke of the engine by a slave piston hydraulically interconnected with a master piston driven by an existing pushtube is provided. The improved engine retarder includes...     

In a multi-cylinder internal combustion engine having a plurality of cylinders which are supplied with air via one common throttle valve and a control unit for regulating the number of operating cylinders which suspends the operation of an arbitrary number of cylinders by intercepting the air supply...     

A multiple cylinder engine of the type which is capable of controlling the number of operating cylinders to operate the engine in either in full or partial displacement mode, wherein the operation is switched smoothly between the full displacement and partial displacement in a simplified manner by detection...     

An inner, generally circular plate secured to the end of an engine cam shaft is connected by means of a linking spider through a toggle linkage to an outer, annular plate driven directly by the engine crankshaft. The drag on the cam shaft during normal operation urges the inner plate toward a normal...     

An infinitely variable phase adjuster for e.g. adjusting internal combustion piston engine valve timing by selecting the relative rotational positions of the engine crankshaft and a camshaft of the engine. Control is effected by adjusting a "lock" volume of oil on one side of a pressure fluid operable...     

The present invention relates to push rods for an internal combustion engine and more particulary to a hydraulic push rod. A new and useful hydraulic push rod of which varies valve timing automatically, improves low end horsepower by altering valve opening and closing degrees, or points of opening in...     

A new and useful rocker arm for an internal combustion engine and more particularly a hydraulic actuated rocker arm of which varies valve timing automatically. Improving low end horsepower by altering valve opening and closing points, while engine speeds increase, valve duration and overlap increases...     

In order to improve air-fuel mixture uniformity and enhance charging efficiency during high engine speed operation and to obviate noise produced as hot exhaust gases flow at sonic velocity back into the induction system and the formation of carbon deposits which can induce valve "stick", the inlet valve...     

An engine driven camshaft cam is driven in a manner to superimpose a variable oscillation on the cam as it is rotatably driven in order to vary the period during which an associated valve is opened, the drive including an engine driven gear or sprocket journalled in a block whose axis is displaceable...     

A variable camshaft timing system for an internal combustion engine varies the relative angular position between the intake camshaft and the exhaust camshaft by controlling the path of the timing belt. First and second idler arms, each having an idler wheel connected thereto, are independently pivoted...     

A method of attaining a desired engine performance comprises the steps of changing the angular position of a variable camlobe (or cam) member relative to a fixed camlobe (or cam) member from a first angular position to a second angular position. In changing from the first to the second angular position,...     

A device for impulsively varying the timing of the rotation of a camshaft (1) relative to a driving sprocket wheel (14) mounted on a stubaxle (102) comprises followers (119,110) rotatable with respective follower shafts (103,104) mounted on the sprocket wheel (14) for rotation about axes parallel to...     

A two- or four-stroke internal combustion engine is provided having individual features and combinations of features not heretofore known which provide enhanced power, efficiency and braking performance compared to known engines.

A guide rail, and method of making same, for the guiding and/or tightening of chains that are used in internal-combustion engines, for example, for driving camshafts, auxiliaries or the like is disclosed. For reasons concerning weight and manufacturing, the guide rail consists of a plastic material and...     

A device (10) for varying the angular phase relation between a camshaft (12) and a crankshaft (unshown) in response to axial displacement of an advancing plate (20) drivingly connected to a support (16) via straight splines (16f) and a drive (18) via angled splines (18d). The support (16) is fixed to...     

An internal combustion reciprocating piston engine is provided with a single overhead camshaft which operates six valves associated with a single combustion chamber by desmodromic valve gear. As viewed in a direction along the camshaft, the valves are mutually divergent in the direction from the camshaft...     

An engine induction system for reducing engine pumping losses provides for a minimum of two intake valves per cylinder, a primary and secondary, with valve port activation means associated with the secondary valves to control air flow to them so that at light loads only air flows through the primary...     

A phase shift device utilized for the camshaft sprockets in a chain control device for an engine having separate camshafts for intake and exhaust valves in an internal combustion engine. A device supporting one or a pair of idler sprockets is shiftable, either pivotally or longitudinally to vary the...     

A variable camshaft timing system for an internal combustion engine varies the relative angular position between the intake camshaft and the exhaust camshaft by controlling the path of the timing belt. First and second idler arms, each having an idler wheel connected thereto, are independently pivoted...     

A variable camshaft timing system for an internal combustion engine varies the relative angular position between the intake camshaft and the exhaust camshaft by controlling the path of the timing belt means. A first belt means is interconnected at one end of the engine between the crankshaft and the...     

An electromagnetic valve control system includes electromagnets having fixed magnetic poles facing opposite end surfaces of a reciprocally movable magnetic plate which is coupled to each of intake and exhaust valves. The intake and exhaust valves can be opened and closed under electromagnetic attractive...     

A supercharged engine has a geometric compression ratio of more than 8.5, and engine specifications are set to establish a relation, Y.gtoreq.-1.75X+10, in which an intake port closing timing Y is expressed by a crank angle after the piston reaches BDC and an overlapping angle X is expressed by a crank...     

A 4-stroke, internal combustion engine having two intake valves for each cylinder wherein a single rocker-arm assembly actuates both of the intake valves in a timed sequence to provide a stratified charge to the cylinder.

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...     

An OHC vertical crankshaft engine, comprising: a vertically disposed crankshaft having a first timing pulley at its lower end; a cooling fan attached to an upper end of the crankshaft; a camshaft extending in parallel with the crankshaft at a cylinder head end of the engine and having a second timing...     

A camshaft driving mechanism in an internal combustion engine is disclosed. It comprises a crank sprocket, a cam sprocket and an idler sprocket disposed therebetween, a first timing chain entrained on the crank sprocket and idler sprocket, and a second timing chain entrained on said idler sprocket and...     

A cylinder block includes a cylinder with a piston therein and a main crankcase. A combustion space is disposed above the piston and a compression space is disposed below the piston. An exterior passage including a reservoir transfers compressed air from the compression space to the combustion space....     

An engine valve driving device includes a rocker arm attached at one end to a valve stem and carrying at its opposite end a roller which engages the surfaces of a stepped cam plate. The cam plate has a horizontal surface which includes upper and lower portions joined by an inclined portion so that horizontal...     

A drive mechanism includes an internal gear rotatably mounted on an eccentric, the eccentric being mounted on a drive shaft for rotation therewith, said internal gear having an arm with an elongate slot, a block being pivotally mounted on a pin slidably located in the slot, an external gear being rotatably...     

In an internal combustion engine utilizing hydraulic valve lifters, a source of pressurized engine oil at a higher than normally expected pressure is supplied thereto. The oil delivered to the lifter galley is derived from either an engine oil pump which produces a higher pressure oil flow then conventionally...     

An internal combustion engine comprises an engine head having at least one cylinder and a crank shaft. Each cylinder holds a piston for driving the crank shaft. At least one intake and one exhaust valve assembly is positioned adjacent each cylinder. Each intake and each exhaust valve assembly includes...     

An internal combustion engine comprises an engine head having at least one cylinder and a crank shaft. Each cylinder holds a piston for driving the crank shaft. At least one intake and one exhaust valve assembly is positioned adjacent each cylinder. Each intake and each exhaust valve assembly includes...     

A variable cam engine comprises a low speed power cam arranged so as to generate high power at low engine speeds, a high speed power cam arranged so as to generate high power at high engine speeds, and an economy cam arranged so as to give good fuel cost performance. The engine is provided with a device...     

An electromagnetic valve actuator for pivoting a rocker arm to open and close a valve of a four-cycle internal combustion engine. The actuator includes a rocker arm with two ends, one end being in contact with the valve. An electromagnet is provided along with means for mounting the electromagnet to...     

A method of operating an automotive-type engine by independently phase shifting the intake and exhaust valves to provide at part loads late closing of the intake valve during the compression stroke to reduce pumping losses, with a delayed overlap between the opening of the intake valve and closing of...     

An adjustable timing gear arrangement having an output shaft and a camshaft operable in timed relationship with the output shaft comprises a first rotatable drive member driven by the output shaft with a second rotatable drive member mounted on the camshaft and operably connected with the first drive...     

Several embodiments of variable camshaft timing means for twin overhead cam engines. There is provided a first timing altering means between the engine output shaft and one of the camshafts and a second timing altering means that is operative between the one camshaft and the other camshaft. Both timing...     

A variable cam engine wherein each cylinder has at least one valve driven by a multiplicity of cams which give different engine torque outputs. The engine includes a decision-making device which decides change-over of the cams along with a selection of a target cam according to the engine running conditions,...     

A camshaft adjuster mounted between a taut strand and a slack strand of a chain connecting an intake camshaft to an exhaust camshaft has two tensioning shoes which are urged by a spring away from each other and against the inner sides of the chain strands. One tensioning shoe is mounted on a reciprocable...     

A hydraulic intake or exhaust valve actuator for an internal combustion engine has a generally cylindrical sleeve, a piston member formed with a head portion and a rod or shaft portion, and a rod bearing through which the rod portion slides axially. To accommodate wide temperature variations, the sleeve,...     

A method of phaseshifting a variable cycle engine utilizing the Otto cycle engine timing schedule for full-load and the Atkinson cycle engine timing schedule for part-load operation, the engine having multiple intake valves and an exhaust valve, phaseshifting of the intake and exhaust events coupled...     

Several concepts/methods and apparatuses are described and illustrated for enhancing/supplementing the natural bidirectional torsional pulses produced by an engine during its operation for use as an actuating force, for example, in a self-energizing engine phaseshifter; one method consisting of adding...     

A variable engine valve control system wherein each of the reciprocating intake and/or exhaust valves is hydraulically controlled and includes a piston subjected to fluid pressure acting on surfaces at both ends of the piston. The space at one end of the piston is connected to a source of high pressure...     

In a control system for a valve actuation property variable control device which can switch over between a plurality of modes including a low speed mode for adapting at least one of an intake valve and an exhaust valve of an engine to a low speed range and a high speed mode for adapting the valve to...     

A camshaft (26) has a vane (60) secured to an end thereof for non-oscillag rotation therewith. The camshaft also carries a sprocket (32) which can rotate with the camshaft (26) but which is also oscillatable with the camshaft (26). The vane (60) has opposed lobes (60a, 60b) which are received in opposed...     

A means of varying both the opening and closing angle of internal combustion engine cam-operated valves by means of a mechanism which responds to the torque applied to the camshaft by the valve springs in such a way that the opening angle of the valves is retarded and the closing angle advanced and in...     

A hydraulic valve drive device for intake/exhaust valves of an internal combustion engine using an oil pump similar to a distributor type injection pump. A plunger rotates and engages in reciprocating motion to pressurize hydraulic fluid taken into a pressure chamber and opens to discharge the same into...     

A controller for a supercharged engine includes a supercharger for supercharging intake air, an intercooler for cooling the intake air discharged from the supercharger, a valve timing varying device for varying valve timing so that an overlapping term, in which both intake and exhaust valves open, is...     

An engine-control system is structured in such a way that a timing for closing the intake valve is retarded and the air-fuel ratio is so set as to become a rich air-fuel ratio richer than, for example, the stoichiometric air-fuel ratio, in a region where the load is low. On the other hand, in a region...     

A variable valve timing mechanism for controlling at least one biased valve comprising a guide assembly having a mounting surface and a spaced apart upper guide surface. The guide assembly includes spaced apart longitudinal guides; a closing stop positioned on the mounting surface and a stop surface....     

Apparatus for permitting selective adjustment of the angular position of a sprocket or gear relative to a driven shaft for changing the timing of an internal combustion engine includes a circular sprocket carried on an end face of the cam shaft in axial alignment with the shaft's axis of rotation. A...     

Intake valve timing information is provided for control and diagnostics in a variable valve timing internal combustion engine application in which check valves are disposed in intake passages connecting engine cylinders to an intake plenum for impeding backflow out of the intake passages and into the...     

An internal combustion engine with a supercharger, of a reciprocating piston type, having a supercharger disposed in an intake passage, wherein the relation of a pressure ratio (.gamma.=P/Po) of pressure (P) on the discharge side of the supercharger to atmospheric pressure (Po) at the time of high load...     

A phase change mechanism is described for varying the phase of an engine camshaft relative the engine crankshaft. The mechanism comprises a drive member to be connected to the camshaft drive, a driven member to be connected to the camshaft, a coupling element for transmitting torque from the drive member...     

The design and construction of current electronically-controlled hydraulically-actuated engine valve systems are currently still being tested for dependability. The electronics control various activities including actuation velocity and, therefore, can include complicated components. The present invention...     

A variable timing gear device for an engine component driven by a drive system from the engine drive shaft. The gear device comprises an epicyclic or differential gear mechanism, an input of which is driven from the engine drive shaft and an output being connected to the driven shaft of the component....     

A camshaft has a front part forming a journal part for a wheel of a timing pulley (a drive member). A stub shaft (a driven member) is secured to the front of the camshaft and disposed within a cylindrical body of the timing pulley. An annular slide is disposed and coacts with the cylindrical body and...     

A variable valve timing camshaft drive system is provided with an adjusting device arranged between the loose end and the load end of a chain which is operative between chain wheels of two parallel camshafts of an internal-combustion engine. For tightening the chain and influencing the relative rotating...     

A coupling gear for transmitting rotation of a first shaft onto a second shaft has a first coupling wheel fixedly connected to the first shaft and a second coupling wheel fixedly connected to the second shaft. A third coupling wheel is driven by the first coupling wheel and a fourth coupling wheel is...     

In a hydraulic-mechanical operating mechanism for a breathing valve of an internal combustion engine in which the valve is engaged by two compression springs, one biasing the valve in opening direction and the other biasing the valve in a closing direction, the valve has a stem with first and second...     

In a diesel engine, the closing timing for the intake valves is maintained in the vicinity of bottom dead center during engine starting and in a low engine revolution speed region, while on the other hand this closing timing is retarded the more from bottom dead center, the higher is the engine revolution...     

According to a control strategy, a cylinder valve control device is monitored and operation of the engine is modified. The cylinder valve control device includes a driving shaft driven by the engine to drive an intermediate member which in turn drives a cam arranged to open an engine intake valve, and...     

A valve system for an internal combustion engine includes a valve member having a head and a stem extending from the head, the head being capable of forming a seal with a valve seat of the internal combustion engine and the stem having at least one cylinder in an end portion thereof, and a component...     

Apparatus especially useful in internal combustion engines for adjusting the timing and including a shaft having a longitudinal axis and mounted for rotation about said axis with a circular drive member carried by the shaft. An adjustable key assembly is located between the shaft and the drive member...     

A valve system for an engine comprises a plurality of intake or exhaust valves, adapted to be driven by cams of which the profiles are different from each other to make maximum valve lifts of the valves different from each other, and compression springs biassing the valves toward the corresponding closing...     

An internal combustion engine having a variable valve timing mechanism, a throttle valve and a flow control valve for controlling the generation of turbulence in a combustion chamber. The control valve is operated so as to generate turbulence in the combustion chamber under low- and mid-range performance....     

A variable valve controlled engine causes the inducted exhaust residual to flow from the exhaust port(s) into specific regions of the combustion chamber and remain substantially separate from the air-fuel mixture, thereby creating stratification. The exhaust gas remains substantially on the piston surface...     

The invention relates to a valve timing for an internal-combustion engine with a variable control of the outlet valve. For reducing the HC-emissions, it is suggested according to the invention to adjust the closing of the outlet valve toward "early". This adjustment must be carried out to such an extent...     

Internal combustion engine variable valve timing control with a camshaft phaser for varying rotational phase between a camshaft and a crankshaft in response to a control command determined through a hybrid control strategy without resort to direct temperature measurement. For a range of phase errors...     

A method for improving efficiency and reducing emissions of an internal combustion engine. Variable displacement engine capabilities are achieved by disabling engine valves during load changes and constant load operations. Active cylinders may be operated at minimum BSFC by intermittently disabling other...     

In a variable timing mechanism, valve lifting characteristics are changed to meet the engine power output characteristics when the timing of valve operation is changed. The variable timing mechanism is provided for the side of at least one of an intake and an exhaust valve so that, when a running condition...     

In an internal combustion engine control system for controlling an internal combustion engine, comprising a fuel injection control apparatus for controlling fuel injection quantity to be injected by a fuel supply system for supplying fuel to the internal combustion engine, and fuel injection timing,...     

The efficiency of a spark-ignition internal-combustion engine having an adjustable fuel-to-air mixture ratio is improved significantly by reducing the fuel-to-air mixture ratio and increasing compression ratio. The increase in compression ratio and the reduction in fuel-to-air mixture ratio causes the...     

A number of embodiments of engines that improve engine performance and lean running stability by employing internal EGR controlled by controlling the volume of the intake passage between the throttle valve and the intake port in relation to the maximum combustion chamber volume.

A rotatable eccentric sleeve allows the position of a cam follower in an internal combustion engine to be altered such that the timing of opening and closing of valve events is altered controllably. Intake and exhaust valves may be phased differently within a compact mechanism.

An engine accessory retards or advances one or more cam shafts of an engine relative to the crankshaft during engine operation. The accessory acts n the timing chain that engages wheels on cam shafts and crankshaft. The accessory includes a rod translatably mounted to the engine, wherein a hydraulic...     

A method for setting the valve lift of an inlet valve of an internal combustion engine at full load. A full-load demand triggers an adaptation function by use of which the valve lift can be set to realize a maximum air mass flow into a cylinder of the internal combustion engine.

A method for controlling an engine having both an electronically controlled inlet device, such as an electronic throttle unit, and an electronically controlled outlet device, such as a variable cam timing system is disclosed. The method of the present invention achieves cylinder air charge control that...     

A number of embodiments of internal combustion engines that embody a variable valve timing mechanism for varying the valve timing during engine operation. The variable valve timing mechanism includes at least one VVT device that is located at a position that is remote from the cam shaft and in each embodiment...     

An automotive variable valve timing engine arranged to control the quantity of intake air to be supplied to a cylinder by regulating valve timings of an intake valve. An intake air quantity measuring device is provided for measuring the intake air quantity. An intake air quantity estimating system is...     

A camshaft phase controlling device which has a quill shaft extending through a hollow camshaft and has one end of the quill shaft directly connected to the drive gear with the other end of the quill shaft formed with helical splines that are connected through a connector member to straight splines formed...     

A new and improved two-part phase changing device which has an axially movable quill shaft extending through a hollow camshaft and has one end of the quill shaft directly connected to the hub member of the timing gear through straight splines and has the other end of the quill shaft connected by helical...     

An engine accessory retards or advances one or more cam shafts of an engine relative to the crankshaft during engine operation. The accessory acts upon the timing chain that engages wheels on cam shafts and crankshaft. The accessory includes a rod translatably mounted to the engine, wherein a hydraulic...