Abstract: A diesel engine having a fuel vaporizing chamber in which liquid fuel is vaporized prior to injection into the precombustion chamber.

Abstract: A plurality of fuel valve injectors for a diesel engine combustion chamber in which a fuel flow control valve assembly having a high pressure fuel inlet is intermittently pressurized, and a low pressure supply pump inlet connected to a fuel pressurization chamber and to a prechamber fuel injector, the high pressure fuel moving a plunger to unseat a ball valve and pressurize the fuel to the injector to inject fuel through it, the stroke of the plunger being determined by the spacer, seating of the ball valve against a seat terminating flow to the injector, continued pressurization in inlet then opening the pressure relief mechanism of the main chamber injector.

Abstract: A geometrically optimized precombustion chamber 12 for a diesel or stratified charge engine is provided which limits the maximum gas temperature through transonic and/or supersonic flow to prevent the production of nitrous oxides and is defined in accordance with the following equation: ##EQU1##

Abstract: A divided chamber internal combustion engine is provided with means to recirculate combustion products from the engine precombustion or auxiliary combustion chamber to the intake prior to or during the main chamber exhaust process. The arrangement limits the exhaust of rich prechamber combustion products to the main chamber and exhaust system and instead recirculates them to the intake for subsequent recombustion and emission control purposes.

Abstract: Internal combustion engine wherein a main air fuel charge is ignited by first igniting a pilot air fuel charge and bringing the two charges together, the main charge being compressed before ignition to a higher compression ratio than the pilot charge.

Abstract: FIG. 1 shows a fuel injection system for an engine having main and prechamber combustion chambers 14 and 22 and separate fuel injectors 18 and 26 supplied from a common source fuel line 50 through a shuttle valve assembly 30. FIG. 3 shows the shuttle valve assembly including a plunger 136 movable by fuel pressure in line 50 and inlet 106 to unseat a ball valve 142 and pressurize a chamber 126 and a line connected to prechamber injector 26 to inject fuel first through the prechamber injector 26 and then through the main injector 18 only after termination of injection through the injector 26 by a seating of the ball valve 142 against a seat 138 to close the chamber.

Abstract: The present invention relates to an internal combustion engine comprising means at cylinder head and piston level for improving combustion while reducing the tendency to knocking and pollution. This engine comprises a double feed system, an intake port for a rich mixture being arranged in a hollow in the cylinder head and comprising a retaining cup at its base, an intake port for a poor mixture and a projecting part at the top of the piston covering the hollow and the retaining cup and defining a precombustion chamber for communicating with a part of the chamber opposite the hollow, via channels made at the base of the projecting part. The invention finds advantageous application in the domain of automobile vehicle construction.

Abstract: An internal combustion engine comprising an auxiliary chamber connected to a main chamber via a connecting passage. A raised portion is formed on the inner wall of the auxiliary chamber. The auxiliary chamber is divided into a first chamber and a second chamber. The connecting passage is tangentially connected to the inner wall of the second chamber at a position opposite to the raised portion with respect to the axis of the auxiliary chamber. A fuel injector having a pair of injection nozzles is arranged in the first chamber. One of the injection nozzles is directed to the tip of the raised portion. The other nozzle is directed to the inner wall of the auxiliary chamber, which is located at a position opposite to the raised portion with respect to the axis of the auxiliary chamber.

Abstract: A two cycle, spark ignition internal combustion engine of the class having a combustion chamber divided into a relatively small ignition region and a larger combustion region including the cylinder and piston is defined. Substantially stoichiometric fuel-air mixtures are independently supplied to the ignition region in substantially fixed quantity and to the larger region in variable quantity and compressed simultaneously so that the mixtures remain completely separated prior to ignition. The mixtures are stratified with respect to excess air supplied to both regions and to exhaust gases in the engine cylinder, and combustion initiated in the ignition region ignites the variable-sized mixture in the larger region. Burning proceeds from stoichiometric mixtures to lean mixtures as the stratified excess air is mixed into the burning gases. When no fuel is supplied to the large region, the small region functions independently and burns its fuel efficiently.