Abstract:
PURPOSE:To improve consumption of liquefied petroleum gas (LPG) fuel and prevent the generation of knocking in an engine when gasoline fuel is used for the engine, by constituting a controller from LPG and gasoline fuel suppliers, fuel supply regulator and a variable compression ratio device. CONSTITUTION:When liquefied petroleum gas (LPG) is stored to a level above the prescribed amount in an LPG tank 8 under the low load operating condition, the signal of an AND circuit 26 opens the first opening and closing valve 15 and closes the second opening and closing valve 16, and LPG is fed to an engine 1 by the first fuel supplier 3. The signal of an OR circuit 29 is output to a variable compression ratio device 18, and the device 18 is controlled to be converted into high compression ratio operation, thus a fuel consumption characteristic is improved by LPG operation. At starting of the engine, a gate circuit 32 is closed, and the variable compression ratio device 18 is controlled to be converted into low compression ratio operation, causing the engine to easily start. When the engine is high loaded or a prescribed amount of fuel is not stored in the LPG tank 8, the signal of the AND circuit 26 is not output, opening the second opening and closing valve 16 and controlling the variable compression ratio device 18 to be converted into low compression ratio operation, and gasoline is fed by the second fuel supplier 4 to perform high output operation, improving the drivability. When a residual amount of fuel is short in a gasoline tank 12, LPG operation is performed in high compression ratio.
Abstract:
The invention is directed to a variable compression ratio internal combustion engine in which the compression ratio of the engine can be varied and multiple types of fuels having different combustion velocities are used. The invention provides a technology for achieving excellent engine performance for respective types of fuels. In the variable compression ratio internal combustion engine in which the compression ratio can be varied and multiple types of fuels having different combustion velocities are injected through multiple fuel injection valves, maps from which a target compression ratio of the internal combustion engine is read out are switched in accordance with the fuel used, thereby suppressing knocking or other disadvantages.
Abstract:
A bi-fuel control system and assembly for modifying and operating a diesel engine (30) to the extent that the engine is capable of running in either a full diesel fuel diesel mode or a bi-fuel mode, where bi-fuel is defined as a mixture of a methane based gas (10) and diesel fuel. The control system and assembly are designed to provide for either manual or automatic transfer between modes for continuous engine operation without interruption in output and at substantially equivalent efficiency levels. A gas control sub-system and sub-assembly are provided to control the amount of gas supplied to the diesel engine (30) in the bi-fuel mode, and an electronic control sub-system and sub-assembly are provided to control the overall system and assembly based on engine load as determined from the intake manifold air (28) pressure.
Abstract:
A method of operating an engine assembly (10) having a cylinder assembly (26) which defines a combustion chamber (46) is disclosed. The method includes the steps of performing an intake stroke of the cylinder assembly (26) and advancing a conditioning fuel into the combustion chamber (46) during the intake stroke performing step. The method further includes the steps of advancing a gaseous fuel into the combustion chamber (46) during the intake stroke performing step and performing a compression stroke of the cylinder assembly (26) after the intake stroke performing step. The method yet further includes the steps of advancing a pilot fuel into the combustion chamber (46) during the compression stroke performing step and combusting the pilot fuel in the combustion chamber (46) during the compression stroke performing step so as to ignite the conditioning fuel and the gaseous fuel. The gaseous fuel and the conditioning fuel are mixed in the combustion chamber (46) prior to the pilot fuel advancing step so as to facilitate ignition of the gaseous fuel in the combustion chamber (46).
Abstract:
La présente invention concerne un dispositif d'injection pour moteur à combustion interne, permettant l'injection de deux combustibles, un combustible liquide dit de préinjection et un combustible liquide ou gazeux dit d'injection principale, comportant une pompe basse pression (1B) pour l'alimentation en combustible de préinjection, une pompe haute pression (1A) du type pompe d'injection, deux injecteurs de combustible et une pompe doseuse (30) reliant de manière sélective la pompe basse pression, la pompe haute pression et les deux injecteurs de combustible, cette pompe doseuse (30) comportant un piston transfert (2) et deux butées (3, 4) réglables indépendamment l'une de l'autre pour permettre de varier l'importance relative de la préinjection et de l'injection principale, ainsi que l'importance du recouvrement de ces deux phases d'injection.
Abstract:
A generator includes an internal combustion engine including an engine block including a cylinder including a piston, a crankshaft configured to rotate about a crankshaft axis in response to movement by the piston, and a spark plug configured to periodically generate a spark to ignite fuel in the cylinder to control the movement of the piston. The generator further includes an alternator including a rotor and a stator, the rotor configured to rotate with the rotation of the crankshaft to generate alternating current electrical power, a controller configured to control a rate of fuel supply to the internal combustion engine, and a switch configured to selectively enable the flow of a first type of fuel into the cylinder and disable the flow of a second type of fuel, wherein the controller is configured to receive an indication of a fuel type based on a position of the switch.
Abstract:
Embodiments described herein relate to systems and methods of operating internal combustion (IC) engines by combusting various fuel chemistries therein. Specifically, engines described herein can operate a wide range of fuel chemistries with varying molecular formulas. The chemical compositions of the fuels described herein make them more difficult to ignite than long chain hydrocarbons (i.e., fuels that include 6 or more carbon atoms in a molecule). In some embodiments, engines described herein can combust fuels that have the chemical properties of alcohols. In some embodiments, engines described herein can combust fuels that include hydroxide groups. Examples of such fuels include methanol and/or ethanol. In some embodiments, engines described herein can combust natural gas. These fuel chemistries are difficult to ignite, particularly at low temperatures and during initial engine startup. Systems and methods described herein address these ignition difficulties, particularly in diesel engine architectures.
Abstract:
Various methods and systems are provided for an intake manifold for an engine. In one example, the intake manifold comprises a first passage for supplying intake air to a plurality of cylinders of the engine and a second passage for supplying gaseous fuel to the plurality of cylinders.