摘要:
A fuel injection control device for an internal combustion engine (2) is provided with a controller (1) functions to command the fuel injectors (8) for a cylinder in the exhaust stroke and for a cylinder in the intake stroke to simultaneously perform a primary fuel injection, when the first cylinder-stroke identification is performed, if the engine temperature is higher than a predetermined temperature. The controller further functions to command the fuel injector only for a cylinder in the intake stroke to perform a primary fuel injection, when the first cylinder-stroke identification is performed, if the engine temperature is less than the predetermined temperature. Thus the startup time of the engine (2) is shortened and the stability of startup is ensured at normal, low, or extremely low temperatures.
摘要:
An auxiliary power assembly (5) for use with a heavy-duty diesel engine (8) of the type used in the trucking industry and including a small auxiliary diesel engine (9), an air compressor (10), a compressed air accumulator (17) fluid coupled to the air compressor (10), and a pneumatic starter (21) fluid coupled to the accumulator (17) and mechanically coupled to start the heavy-duty diesel engine (8). The auxiliary power assembly (5) further drives: a coolant pump (51) connected to circulate coolant between the auxiliary engine (9) and main diesel engine (8), a refrigerant compressor (41) formed to pump air conditioning fluid from the main diesel engine air conditioning system to the vehicle cab (70), and a pre-oiler pump (83) used to pressurize lubricating oil in the main engine (8). A method of operating the overall assembly and for retrofitting an existing heavy-duty diesel engine (8) with the auxiliary power assembly (5) also are disclosed.
摘要:
An engine starting system including a control unit (20) which controls an engine starting sequence to prevent start attempts when the engine is running and regulates the starting function within a control range of revolutions for efficient use of the available starting power either in the form of pressurized fluid from a tank (2) or electrical discharge of a battery (2) to a starter motor (1).
摘要:
A device for detecting the deterioration of a catalytic converter for an engine having two or more cylinder groups, and a catalytic converter disposed in a common exhaust passage with which exhaust passages individually connected to the respective cylinder groups are merged, wherein the air-fuel ratio of the respective cylinder groups are controlled independently based on the output of the upstream air-fuel ratio sensors disposed in the respective individual exhaust passages. Since the air-fuel ratios of the respective cylinder groups are controlled independently, the phases of the air-fuel ratio oscillations of exhaust gases flowing into the common exhaust passage from the individual exhaust passages are usually not synchronized. However, during the engine operation, the phases of the air-fuel ratio oscillations of the exhaust gases are occasionally spontaneously synchronized due to slight differences of the periods of the cycle of the air-fuel ratio feedback controls in the respective cylinder groups. The device detects such a spontaneous synchronization, and determines whether or not the catalytic converter has deteriorated based on the output of the downstream air-fuel ratio sensor disposed in the common exhaust passage downstream of the catalytic converter.
摘要:
A double clutch mechanism is disclosed for use within a starter assembly (10) for selectively coupling power to start a turbine engine (11). The double clutch includes a primary engagement assembly (21) and a secondary engagement assembly (22), either of which may be of the pawl and ratchet type or the sprag type, for coupling power to the enging (11) and preventing overrunning of the starter assembly (10).