摘要:
A system for a vehicle includes a voltage measuring module, a second derivative module, a closing period module, and an injector driver module. The voltage measuring module measures first and second voltages at first and second electrical connectors of a fuel injector that injects fuel directly into a cylinder of an engine. The second derivative module determines a second-order derivative of a difference between the first and second voltages. The closing period module determines a closing period of the fuel injector based on the second-order derivative of the difference. The injector driver module selectively adjusts closing of the fuel injector based on the closing period.
摘要:
A fuel injection system for a direct fuel injection engine is provided. The system includes an injection mode module that selects a fuel injection mode to be one of a single injection mode and a dual injection mode during engine operation and a fuel injection command module that commands fuel injection events based on a crankshaft position, the fuel injection mode and a fuel percentage blending schedule.
摘要:
An engine cranking system includes fuel injectors that are associated with multiple combustion chambers of an engine. The fuel injectors include a first fuel injector that is associated with a first combustion chamber. A second fuel injector is associated with a second combustion chamber. A control module is coupled to the fuel injectors and operates the first fuel injector in a deactivated state for a first chamber cycle during cranking of said engine. The first chamber cycle includes intake and exhaust strokes and is associated with a first combustion chamber.
摘要:
A fuel injection system for a direct fuel injection engine includes an injection mode module. The injection mode module selects a fuel injection mode to be one of a single injection mode and a dual injection mode. A fuel injection command module transitions between the single and dual injection modes by varying the timing of fuel injection events relative to a crankshaft position.
摘要:
A fuel injection system for a direct fuel injection engine is provided. The system includes an injection mode module that selects a fuel injection mode to be one of a single injection mode and a dual injection mode during engine operation and a fuel injection command module that commands fuel injection events based on a crankshaft position, the fuel injection mode and a fuel percentage blending schedule.
摘要:
A system for a vehicle includes a voltage measuring module, a second derivative module, a closing period module, and an injector driver module. The voltage measuring module measures first and second voltages at first and second electrical connectors of a fuel injector that injects fuel directly into a cylinder of an engine. The second derivative module determines a second-order derivative of a difference between the first and second voltages. The closing period module determines a closing period of the fuel injector based on the second-order derivative of the difference. The injector driver module selectively adjusts closing of the fuel injector based on the closing period.
摘要:
A fuel injection system for a direct fuel injection engine includes an injection mode module. The injection mode module selects a fuel injection mode to be one of a single injection mode and a dual injection mode. A fuel injection command module transitions between the single and dual injection modes by varying the timing of fuel injection events relative to a crankshaft position.
摘要:
A method of controlling engine internal exhaust gas recirculation may include estimating a flow restriction through a diesel particulate filter in an exhaust system of an engine assembly and adjusting a backpressure control valve in the exhaust system downstream of the diesel particulate filter based on the flow restriction. A controlled amount of internal exhaust gas recirculation may be provided to the engine assembly based on adjusting the backpressure control valve.
摘要:
An engine control system for a vehicle comprises a combustion control module and an engine startup module. The combustion control module selectively controls a spark timing and airflow into an engine based on a counter value. The engine startup module, when the counter value is one of greater than and less than a predetermined final value, controls an equivalence ratio (EQR) of an air/fuel mixture provided to the engine during an engine cranking period based on a fuel rail pressure and controls the EQR during an engine running period based on the fuel rail pressure and an engine runtime period. The counter value is set to the predetermined final value after the engine is started for a first time after the engine is assembled.
摘要:
An engine control system comprises a model pressure determination module and a sensor diagnostic module. The model pressure determination module determines a modeled fuel rail pressure based on an injection duration of a fuel injector and a desired fuel mass injected by the fuel injector. The sensor diagnostic module generates a status of a fuel rail pressure sensor based on a comparison of the modeled fuel rail pressure and a sensed fuel rail pressure.