Abstract: A valve timing control apparatus in an internal combustion engine, designed to improve its controllability by deciding a control value by taking into consideration the number of the internal combustion engine and the direction to which the valve timing is to be changed, said valve timing control apparatus which changes the valve timing by changing the rotational phase of the camshaft with respect to the crankshaft comprising: means for detecting the operating condition of the internal combustion engine; means for deciding an optimum timing of the valve from the operating condition detected; means for grasping the present timing of the valve by detecting a phase difference of the camshaft from the crankshaft; and means for causing the present timing to become the optimum timing, wherein there is further provided means for discriminating the direction (advance, retard) to which the valve timing is to be changed from a phase difference between the present timing and the optimum timing in order that the change of

Abstract: A fuel injection system that includes an injector having a pintle movable within a housing for selectively opening and closing communication between inlet and outlet ports in the housing. The inlet port is connected to a source of fuel under pressure, while the outlet port is connected to a nozzle for delivering fuel under pressure to the engine. A section of magnetic material is coupled to the pintle, and a permanent magnet is mounted on the engine flywheel, such that magnetic forces imparted as the permanent magnet moves therepast moves the pintle against a spring to open communication between the inlet and outlet ports, and thereby deliver fuel under pressure from the source to the nozzle. A cam mechanism is rotatably positioned within the pintle housing and operatively coupled to the pintle for adjustably varying stroke of the pintle within the housing, and thereby varying time duration during which the injector opens communication between the fuel source and the nozzle.

Abstract: An engine intake system includes a primary port for introducing intake gas throughout an entire engine operating condition. A secondary port is provided with a gate valve which is opened in a high engine load condition for introducing the intake gas. A ratio of a tumble flow to a swirl flow is gradually increased as the gate valve is operated from an entirely closed condition to a fully open condition. According to this invention, ignition and combustion characteristics can be improved.

Abstract: A vaporized fuel injection system for an internal combustion engine includes a housing adapted to be mounted on the engine and having a vaporizer heat shell therein connected to the engine for receiving hot exhaust gases. Air is compressed by means of compressor blades mounted at the tips of the conventional fan blades for the engine. The compressor blades travel in a shroud whereby the air is compressed and supplied to the housing where it passes over the vaporizer heat shell. A fuel vaporization chamber is formed directly on the heat shell and liquid fuel is injected directly onto the heated shell for vaporizing the fuel. When the engine is cold, the liquid fuel may be injected directly onto glow plugs disposed in communication with the chamber.

Abstract: A rigid connector tube telescopically engages the fuel rail and the inlet of a top-feed fuel injector. Various embodiments of such connector tubes are disclosed. Such connector tubes enable a top-feed fuel injector to be used in an integrated air-fuel system where a fuel rail is integrally formed with a manifold such that the fuel supply ports of the fuel rail are in fixed spatial relation to the fuel injection ports of the manifold.

Abstract: An improved rocker arm which is held in positive engagement with a head thrust surface of a cylinder head to avoid the occurrence of pitching of a valve stem end and vibration or noise from a valve-driving system. The rocker arm enables a rocker shaft spring to be set at a reduced load, whereby low friction is realized. An arm thrust surface of the rocker arm is provided with an oil groove having a predetermined depth. The arm thrust surface is positioned against a head thrust surface of the cylinder head. The oil groove communicates with the rocker shaft hole so as to introduce oil outside.

Abstract: A control device for a valve system in which low or high speed cams can be smoothly changed. The control device comprises: a valve system including low and high speed cam selecting means for activating and deactivating intake or exhaust valves; and a control unit for calculating, based on engine operation data, a target engine speed to provide a cam selecting signal to the low and high speed cam selecting means, a variation of the engine speed based on the engine speed data, a corrected target engine speed based on the engine speed variation, target engine speed, and delay time of the operation of the cam selecting means, and activating the cam selecting means at the corrected target engine speed.

Abstract: A process for operating a combustion engine which comprises the steps of thermoelectrochemiclly regenerating waste heat rejected by the combustion engine by adding waste heat to an electrolysis cell, generating hydrogen by an amount of electricity that is reduced as a result of additions of waste heat and using the hydrogen as a stratified-charge combustant within each combustion chamber of the engine.

Abstract: A valve control device and related method of valve control which enhances performance characteristics of an internal combustion engine that utilizes push rods and extends the useful life of the valve control device is provided. The valve control device includes a valve engagement assembly which, in response to movement of the camshaft associated with the engine, interacts with a first valve closure mechanism associated with the valve such that the valve is efficiently opened and closed. The valve engagement assembly includes a rocker arm, which is pivotally connected to the engine and associated with a push rod which is reciprocable in response to movement of the camshaft. Further, a second valve closure mechanism is associated with the push rod for actuating downward movement of the push rod in cooperation, and substantially in unison, with the first valve closure mechanism which is engageable with the rocker arm.

Abstract: A diesel engine (10) has a precombustion chamber (30) with four circumferentially spaced and angled transfer passages (60, 61) leading to the main combustion chamber (44). Each transfer passage (60, 61) is tapered to provide a larger lower end (62) facing the main chamber (44) and smaller upper end (64) facing the precombustion chamber (30). Air passing through the passages during the compression stroke undergoes heating and swirling within the precombustion chamber. The flame front passing from the precombustion chamber to the main combustion chamber are aimed toward the centers (68 and 69) of respective recessed lobes (20 and 22) within piston (18).

Abstract: A gaseous fuel rotary piston engine has a rotor housing and a rotor. A side housing of the rotor housing is provided with an air intake port for supplying air to working chambers defined in the rotor housing and a gaseous fuel port which is connected to a gaseous fuel source through a fuel supply passage and through which gaseous fuel is supplied to the working chambers. The air intake port is formed to open near the top dead center on the intake stroke and close after the bottom dead center on the intake stroke. The gaseous fuel port is formed to open near the opening time of the air intake port and close substantially at the middle of the compression stroke. Additionally, a hydrogen engine is connected to a hydrogen discharging tank containing a hydrogen storage alloy by way of a heating medium passage and a hydrogen supply passage. A pressure tank is provided in the hydrogen supply passage.

Abstract: Disclosed herein is a four stroke internal combustion engine comprising a cylinder head fabricated of metal and including an intake manifold mounting surface, and an intake passage including a port in the intake manifold mounting surface, an intake manifold fabricated of metal and including a cylinder head mounting surface, and an intake passage including a port in the cylinder head mounting surface, a fastener connecting the intake manifold to the cylinder head with the ports in registration and with the cylinder head mounting surface and the intake manifold mounting surface in metallic surface-to-surface contact, and a seal between the intake manifold mounting surface and the cylinder head mounting surface.

Abstract: The disclosure is directed to a fuel-air mixing device for an internal combustion engine. The fuel-air mixing includes an inner elongated hollow body portion for delivering a fuel-air mixture from a carburetor or a fuel-injection device into the inlet of the intake manifold of the engine. The device includes an outer elongated body portion within which the inner body portion is disposed. The cavity is formed between the interior surface of the outer body portion and the exterior surface of the inner body portion. The cavity is open at one end portion facing the flow of the fuel-air mixture. The opposite end of the cavity is closed. The fuel-air mixture contains droplets of fuel which pass adjacent the inner surface of the carburetor or the fuel injection device. Such droplets enter the opening of the cavity of the mixing device and accumulate therein. Additional in the mixing device enable a small portion of the flow of the fuel-air mixture to move inwardly therethrough and into the cavity.

Abstract: An arrangement for supplying fuel to an internal combustion engine of a motor vehicle has a supply tank, an aggregate which is located in the supply tank and a fuel delivery unit for supplying fuel from the supply tank to the internal combustion engine. The aggregate has a plurality of components extending along a delivery path of the fuel, is located in the supply tank, and is provided with a supporting element which carries a holding member for the components of the aggregate.

Abstract: A lubricating system and method of operating the system for an internal combustion engine wherein the amount of lubricant supplied to the engine from a positive displacement engine driven pump is varied by selectively delivering lubricant from the pump to the engine or bypassing the lubricant back to the return of the pump. The amount of lubricant supplied is varied by changing both the duty ratio of the lubricant supply and the duration of engine supply in response to a map of engine conditions. Various control routines are disclosed and in each the lubricant supplied to the engine is monitored so that once a finite amount of lubricant is supplied, lubricant is not supplied again to the engine until that amount previously supplied has been consumed.

Abstract: A vehicular engine speed controller for keeping the engine speed constant while preventing the overrunning of the engine. The vehicle includes a propeller shaft connected to driving wheels and a torsional damper for connecting the propeller shaft with the engine drive shaft. The controller comprises a detector for detecting a value corresponding to engine speed, and an injection control device for controlling injectors, based on the detected value from the detector. The control device stores a first and second determining values (Da and Db). The control device halts fuel supply from the injector when the detected value exceeds the first value (Da), and resumes fuel supply when the detected value becomes below the second value (Db).

Abstract: The invention is directed to a method for checking the operability of a conduit system conducting a fluid flow. The conduit system is for an internal combustion engine and utilizes two fluids having temperatures which are different from each other. In this way, it is possible to set quite well-defined measuring conditions. The fluid flow in the conduit system to be checked is coupled to the temperature sensor in such a manner that the temperature thereof changes with a relatively steep gradient when, starting at a specific time point, the above-mentioned fluid operates to warm the temperature sensor. When the magnitude of the gradient remains below a threshold value, the conduit system checked is evaluated to be operational. The measurement is reliable even though it requires only a single temperature sensor.

Abstract: An induction regulator for an internal combustion engine comprises at least one perforated element for allowing passage of fuel/air mixture therethrough, at least one open top reservoir for retaining excess unvaporized fuel and a closed loop supporting strip which is coupled to the perforated element. The closed loop is mounted between opposed flanges of the engine manifold which is downstream of the engine's carburetor. The regulator improves the atomization of the fuel as it is processed through the manifold and carburetor, thereby leading to improved fuel consumption and reduced exhaust pollution. The continuous closed loop supporting strip provides for secure attachment of the regulator to the manifold, as well as allows for easier adjustment of the regulator with respect to the manifold.

Abstract: A valve operating mechanism for an internal combustion engine for varying the operation of the valve dependent on engine operating conditions. A first rocker arm movable to follow a first cam and a second rocker arm movable to follow a second cam corresponding to a higher speed operating condition than that of the first cam are pivotally supported on a rocker arm shaft. A first connection switching device capable of switching the connection and disconnection between the third and first rocker arms and a second switching device capable of switching the connection and disconnection between at least one of the first and third rocker arms and the second rocker arm independently from the first connection switching device, are disposed at locations displaced circumferentially relative to the rocker arm shaft.

Abstract: A process for the addition of ferrocene to combustion or motor fuels involves an improved metering of the additive ferrocene into the combustion chamber of an internal combustion engine or a combustion system. The process utilizes the sublimation properties of ferrocene in that ferrocene is passed through sublimation into a stream of combustion gas or a substream thereof and with the combustion or motor fuel, which is present as a vapor or finely distributed as solid or liquid particles, fed to a chemical conversion through combustion. A preferred application consists of loading the combustion chamber of a diesel engine equipped with a diesel particulate filter with a carrier gas stream enriched with ferrocene vapor in a sublimator.