Abstract: The invention contemplates a continuously circulating pumped flow of diesel-engine fuel, involving thermodynamic coupling to the engine's coolant-circulation system (a) while the engine is operating and (b) involving selectively available thermodynamic coupling to an externally supplied electric-heater element during periods of engine shut-down. To assure fuel circulation during such operation of the heater element, a rectifier taps the external electric supply to provide pump excitation and thus not to drain the charge on the storage battery associated with the engine.

Abstract: An improvement to an interval combustion engine having an exhaust gas recirculation system which comprises a negative pressure line from the carburetor communicating with valve means to control the amount of recycled exhaust, the improvement being provided by manually operated valve means inserted in the negative pressure line. This manually operated valve means has an inlet port open to the atmosphere and manual adjusting means to control the size of the inlet port, to thereby minimize recycling of excessive amounts of exhaust gas which can result in inefficient engine operation.

Abstract: An internal combustion engine having a cylinder block comprising one cylinder or a plurality of cylinders, a piston reciprocable in each cylinder, a crank shaft, a cylinder head with inlet and exhaust valves, inlet and exhaust conduits, an ignition or injection device and valve timing means operatively associated with the cylinder head, fuel supply means in communication with the engine intake side, a feed line for supplying a pressurized or ambient air pressure additional fluid such as a gaseous or a liquid fluid to the cylinders of the engine toward a location upstream of the inlet valve seat(s). The feed line outlet may be formed as a Venturi tube. The feed lines and portions of the intake and exhaust conduits may be incorporated into an intermediate flange member adapted to be mounted on the engine block intermediate the intake/exhaust conduits and respective associated intake/exhaust manifolds. The feed lines may include non-return valve means.

Abstract: A valve assembly (10) is provided for controlling the recirculation of exhaust gases in an internal combustion engine. The assembly includes a lower housing portion (20) having an exhaust gas inlet (24) and an exhaust outlet port (28). An upper housing member (30) has mounted therein an upper flexible diaphragm (48) biased by a spring (72) a predetermined amount in an upward direction, and a lower diaphragm (76) which is also biased by a spring (102) a predetermined amount in a downward direction. The upper and lower diaphragms define a control chamber (108) which is communicated with an engine intake manifold vacuum source. An axially movable valve member (90) is connected to the lower end of a valve stem (88) which is in turn connected to the lower diaphragm.

Abstract: An exhaust gas recirculation valve including a passage structure defining therein an exhaust gas recirculation passage having provided therein an orifice. A movable valve member cooperates with the orifice for metering the exhaust gas flow therethrough. A tubular wall member projects into the exhaust gas recirculation passage and defines an axial bore having one end thereof facing to the valve member. A valve stem has one end thereof connected to the valve member and the other end disposed outside of the passage structure and connected to an actuator. The valve stem extends through the axial bore in the tubular wall member and a guide opening in the passage structure.

Abstract: A predetermined amount of exhaust gas recirculation is constantly provided through a first passageway (21) connected between an engine intake manifold (12) and an exhaust manifold (13). A vacuum actuated valve (19) constitutes a second passageway which is connected in parallel with the first passageway (21). The valve (19) is opened to allow exhaust gas recirculation through the second passageway except during idling and heavy load operation of an engine (11), thereby preventing excessive emission of smoke under these conditions.

Abstract: An internal combustion engine for a vehicle has an exhaust gas recirculating system for returning exhaust gases to the engine intake passage. The carburetion system for the engine includes a fuel enrichment valve. Sensors for various vehicle speeds and engine operating conditions operate control valves whose actions are modified by a sensor for atmospheric pressure, to control the fuel enrichment valve and a valve in the recirculation passage so that fuel enrichment and exhaust gas recirculation are both reduced when the vehicle travels at a high elevation having low atmospheric pressure.

Abstract: An internal combustion engine for a vehicle has an exhaust gas recirculation system for returning exhaust gases to the engine intake passage. The carburetion system for the engine includes a fuel enrichment valve. Sensors for high vehicle speed and low vehicle speed control the fuel enrichment valve and a valve in the recirculation passage so that the fuel enrichment valve and the exhaust gas recirculation valve are controlled in a manner so that exhaust gas recirculation and fuel enrichment are increased in a lower vehicle speed range, and decreased in a higher vehicle speed range.

Abstract: An exhaust gas recirculation control valve for preventing carbon and the like contained in the exhaust gas from attaching to the inner wall surface of exhaust gas paths, through which the exhaust gas from an engine of a motor car passes, thus decreasing the diameters of the paths with time. This exhaust gas recirculation control valve is provided in a passageway, through which the exhaust gas from the engine is recirculated into an intake air-fuel mixture, a path being of a frusto-conical shape in cross-section and having a progressively larger diameter toward an exhaust gas inlet is formed upstream of the minimum diameter portion, and the inner diameter of the smallest diameter end of said path being of the frusto-conical shape in cross-section in the vicinity of said minimum diameter portion is larger than the inner diameter of said minimum diameter portion. The path being of the frusto-conical shape in cross-section may be formed of a valve housing separately manufactured of a valve seat.

Abstract: This patent specification discloses an engine exhaust gas reflux apparatus constructed so as to purify exhaust gas coming out of various engines mounted on vehicles or ships for preferably preventing NO.sub.x from being discharged in the atmosphere.The engine exhaust gas reflux apparatus has a technical construction which removes dust particles and impurities contained in exhaust gas by means of a dust collector installed at the discharge port of the exhaust manifold, draws purified exhaust gas into the intake manifold and lowers combustion temperature produced when the engine fuel burns to eliminate NO.sub.x out of exhaust gas coming out of the exhaust manifold.

Abstract: An air and fuel induction system for a two cycle engine having two adjacent horizontal cylinders positioned aligned one above the other and each having a separate closed crankcase includes a single horizontally positioned carburetor having a single metering system for supplying an air and fuel mixture to both cylinders. An induction passageway for each cylinder connects between the carburetor and each crankcase. Each induction passageway has an opening at about the same elevation and each opening has about the same cross sectional area. A reed valve is positioned adjacent the carburetor throat and at the entrance to each of the induction passageways. The reed valve includes at least one flat reed positioned directly across and closing the opening to each of the induction passageways.

Abstract: An internal combustion engine is disclosed which includes active cylinders which are always active and inactive cylinders which are inactive when the engine load is below a predetermined value. The engine has an intake passage divided into first and second branches connected to active and inactive cylinders, respectively. The second branch is provided near its inlet with a stop valve and is connected through an EGR passage to the engine exhaust passage. Means are provided to attenuate pressure waves resulting from exhaust pulsations and propagated through the EGR passage toward the second intake passage branch.

Abstract: A fuel injector of the invention comprises a plurality of parallel, threadlike tubes for admitting electrostatically charged fuel and an accelerator electrode biased at the opposite potential to that applied to a fuel charging electrode. The fuel admitted through the parallel tubes is atomized at the outlet port of the tubes as a result of electrostatic repulsion between charged particles, and attracted and accelerated by an electrode spaced from the outlet port of the tubes. A control electrode may be provided spaced from the accelerator electrode adjacent to the outlet port of the tubes and biased at a potential with respect to the accelerator electrode much lower than the potential applied across the accelerator and fuel-charging electrodes. By varying the potential at the control electrode, the fuel quantity delivered can effectively be controlled.

Abstract: An internal combustion engine having both an air-fuel mixture and exhaust in the cylinder during the compression stroke with one of the air-fuel mixture and exhaust being in the cylinder at the start of the compression stroke and the other being pumped into the cylinder during the compression stroke, with the shape of the cylinder head being adapted to maintain the air-fuel mixture undiluted with exhaust.

Abstract: In an internal combustion engine with an engine unit support (1) comprising parts directly affected by body resonance as, e.g., cylinder block (2), cylinderhead (3), crankshaft (7) and crankshaft bearings (6), the engine unit support is connected to the crankcase (8) by means of several vibration absorbing and power transmitting elements (29) whereby the crankcase is insulated against body resonance. A sealing element (40; 44) is arranged between the engine unit support (1) for the crankcase (8) and sealing a lower oil-wetted part (15) of the engine oil-tightly against an upper dry part. The vibration absorbing elements (29) are mounted on the one side at the walls (25, 26) of the crankcase (8) and on the other side at the main bearing walls (20, 21) of the engine unit support in the region of the crankshaft axis (22).

Abstract: An anti-pollution system for an internal combustion engine wherein a container within which is a body of water has an air injection system including first tubing extending into the container, second tubing connected to extract combustion gases from the engine exhaust system to introduce them into the container, third tubing extending from within the container to the engine intake system to subject the interior of the container to vacuum, and a heater energized from the vehicle ignition system for heating the body of water, so that during engine operation combustion gases are introduced into the container where they are cleansed, enriched with air and passed into the fuel intake system.

Abstract: The invention relates to a control apparatus for the variation of the onset of supply by a fuel injection pump having an adjustment piston engaging the piston cam drive, the adjustment piston under rpm-dependent pressure being adjustable counter to a restoring force by a fluid located in a work chamber of the adjustment piston, and an assembly for prolonging the supply time and at least during pump supply on the basis of the restoring and reactionary force including displacing the adjustment piston counter to the fluid pressure.

Abstract: The two-cycle internal combustion engine includes an engine block having a cylindrical wall defining a cylinder having a head end, a piston mounted for reciprocative movement in the cylinder, and a passage in the engine block, such as an exhaust passage, a transfer passage, or a crankcase fuel intake passage, terminating at the cylinder wall in a port, such as an exhaust port, a transfer port or a piston-controlled, crankcase fuel intake port, having upper and lower edges. A valve mounted in the passage for movement relative to the port is operable to selectively vary the effective distance of one of the port edges from the cylinder head end and thereby provide the capability of varying the timing of the port opening and/or closing as required to obtain optimum engine performance at different operating conditions.

Abstract: A fuel injection system is proposed which brings about an improvement in the acceleration behavior of an internal combustion engine. The fuel injection system includes metering valves actuatable by means of an air flow measuring device, at which valves a pressure difference can be held constant via control valves and the pressure difference is variable in accordance with operational characteristics of the engine. To this end, the control valves are located on a control pressure line in which a control throttle and an electromagnetic valve are disposed. At the same time, pressure limitation elements communicate with the control pressure line and, in the event of acceleration of the engine, reduce the extent of increase of control pressure and thus assure fuel metering corresponding with the operational state of the engine.

Abstract: A front transfer port system to help ensure a regular cooling of the piston and cylinder temperature at the points where the heat conditions are more severe, and to improve the transfer process of the mixture that transfers from the crankcase to the cylinder with more scavenging efficiency to displace spent products to the atmosphere through the exhaust ports in an internal combustion two-stroke cycle engine. The front transfer port system is situated in the cylinder wall at the front and between the exhaust ports.