Abstract: Embodiments for operating an internal combustion engine are provided. One example method for operating an internal combustion engine having at least one cylinder head and at least two cylinders, in which each cylinder has at least one inlet opening for the supply of combustion air into the cylinder, comprises activating a heating device for heating the combustion air when a fuel supply of the internal combustion engine is deactivated, the heating device arranged in an overall intake line coupled to the internal combustion engine, the overall intake line including at least two merged intake lines, each intake line leading to an inlet opening of a respective cylinder.

Abstract: An apparatus and a method for enhancing diesel engine performance is provided. At low engine load and cold ambient temperatures, an intake air heater increases the engine load via an engine alternator, which in turn, enables the engine to burn more fuel by the process of combustion. The combusted fuel elevates exhaust gas temperatures, which thereby accommodates cold start, controls white smoke, and aids DPF regeneration.

Abstract: An engine ECU stores a map in which three regions, that is, a high-temperature region, a low-temperature region, and a region therebetween, are prescribed. The pre-feed time T set when the present condition falls in the region is the longest. An engine ECU executes a program that includes the step of detecting an engine cooling water temperature THW when the start-up of the engine is requested, the step of executing the pre-feed until the fuel pressure P becomes equal to or greater than a fuel pressure threshold value P(TH), and the step of starting the cranking when the fuel pressure P becomes equal to or greater than the fuel pressure threshold value P(TH). Thus, the bad start-up caused by fuel vapor is avoided without operating the fuel pump unnecessarily for a long time.

Abstract: The present invention relates to internal combustion engines, particularly to a reciprocating piston type internal combustion engine with a crank and multiple circular slide blocks, formed by substituting connecting rods with circular slide blocks. The engine comprises a crank-and-circular slide block mechanism including a cylinder body, pistons, circular slide blocks, a crankshaft and the like. In the cylinder body, there is a sliding track in which there is a dynamic balance sliding piece. There are at least three circular slide blocks connected into an integral, with the phase difference of the adjacent circular slide blocks being 180.degree., and the circular slide blocks being rotably received in the pistons or the dynamic balance sliding piece and all being sleeved on the same crank pin.

Abstract: A system for detecting abnormality in combustion of an internal combustion engine based on fluctuations in the rotational speed of the engine. A signal corresponding to the rotational speed of the engine is subjected to frequency analysis. Abnormality in combustion of the engine is detected based on amplitude of components of the signal at respective predetermined frequencies, the components being obtained by the frequency analysis.

Abstract: A mechanical process for significantly improving the octane rating performance of gasoline powered engines (either conventional carburetion or fuel injection). An auxiliary system fractionates a precise portion of the required fuel and combines the fraction thus formed with a conventionally produced air/fuel mixture in states and proportions which optimize the combustion process. Different means of implementing the process are described utilizing an additional fuel controller which is connected to a fuel supply through an existing fuel pump which delivers fuel to both the fuel controller and an existing carburetion of fuel-injection system. Air for both is drawn through a common air filter. A proportioning system determines the proper amount of air and fuel entering the controller where they are mixed. The vapor fraction is enhanced and stabilized by passing the mixture through a heat exchanger.

Abstract: An apparatus and method for achieving hypergolic combustion, in which a hydrocarbon fuel is partially combusted by a catalytic reaction to form a high temperature hydrogen-rich product gas, which is directly injected into an oxidizing atmosphere in a combustion chamber while at a temperature sufficiently elevated to enable hypergolic combustion therein. The air-fuel ratios are selected to minimize coke formation at the elevated temperatures of the product gas.

Abstract: An internal combustion engine includes a plurality of cylinders arranged parallel to and equally spaced from a longitudinally extending engine axis with a pair of opposed pistons mounted in each cylinder for controlled reciprocation therein. Respective rotatably mounted axial-faced cams and connected followers control the motion of the pistons through the operating cycle to permit at least one and preferably more power strokes from each cylinder during each rotation of the engine. A controllable divider valve is located between the opposed faces of the pistons to define, on the one side, a first air/fuel receiving compression chamber and, on the other side, a second relatively high-pressure ignition air receiving chamber.

Abstract: Pre-cooled aerosol spray fuel/air mixture is discharged through an array of metering tubes which are housed within a heat exchange chamber. Engine coolant is circulated through the heat exchange chamber. As the aerosol fuel/air mixture is drawn from the carburetor through the metering tubes and into the manifold, heat transfer from engine coolant circulating through the heat exchange chamber causes the aerosol mixture in the metering tubes to vaporize. In a preferred embodiment, the temperature rise within the heat exchange chamber is limited by heat transfer to an air circulation tube which is coiled within the heat exchange chamber.

Abstract: An engine and method in accordance with this invention includes a plurality of parallel cylinders equally spaced from a longitudinally extending engine axis with a pair of opposed pistons in each cylinder for controlled reciprocation therein. Respective rotatably mounted axial-faced cams and followers control the motion of the pistons through the operating cycle to permit at least one power stroke from each cylinder during each rotation of the engine. A controllable divider valve located between the opposed faces of the pistons defines, on one side, a first air/fuel receiving compression chamber and, on the other side, a second relatively high-pressure ignition air receiving chamber.

Abstract: A vapor fuel system for an internal combustion engine includes two vaporizing units for vaporizing liquid fuel and mixing it with air and a vapor heat exchanger for heating the fuel vapor-air mixture prior to its combustion in the engine. Hot fluid circulating in engine's cooling system flows through a jacket integrally surrounding each of the two vaporizing units and the vapor heat exchanger to provide a source of heat for vaporizing the fuel and heating the fuel vapor-air mixture. A fuel line carrying the liquid fuel to each of the vaporizing units passes through the hot fluid-filled jacket surrounding each of the units, thereby preheating the fuel before it is vaporized. In an alternate embodiment of the invention, two solenoid valves, one along the fuel line leading to each vaporizing unit, act in conjunction with a timing means to alternate periodically activation and deactivation of the vaporizing units.

Abstract: A method and apparatus for producing an air/fuel vapor mixture for use in the combustion chambers of an internal combustion chamber which includes an enclosure into which ambient air is introduced with a heater for heating the ambient air together with a fuel vaporizer for vaporizing fuel injected into the enclosure and for mixing with the heated air and another heater for heating the resulting air/fuel vapor mixture which is subsequently conducted out of the enclosure to the combustion chambers of the internal combustion engine.

Abstract: A system for feeding gasoline fuel into a gasoline burning internal combustion engine is disclosed herein along with its method of operation. In accordance with this system and method, gasoline fuel in a liquid state is supplied to a vaporization chamber where it is vaporized and thereafter directed to the engine for combustion therein. In order to prevent this vaporized fuel from condensing back to a liquid, a supply of air is preheated to a controlled predetermined temperature and directed into the vaporization chamber where it combines with the vaporized fuel and is passed with the latter to the engine.