摘要:
An adjustable grill shutter system is provided. In one embodiment, adjustment of the grill shutter system can be provided by a method of adjusting a grill shutter system for a vehicle, the method comprising adjusting opening of one or more grill shutters located at a front end opening of the vehicle in response to a non-driven vehicle condition.
摘要:
Methods and systems are provided for monitoring a fuel vapor recovery system including a fuel tank isolation valve coupled between a fuel tank and a canister. During selected conditions, the valve is modulated and pressure pulsations in the fuel vapor recovery system are monitored. Valve degradation is identified based on correlations between the valve modulation and the resultant pressure pulsations.
摘要:
A method and system for fuel vapor control in a hybrid vehicle (HEV). The HEV fuel vapor recovery system includes a fuel tank isolation valve, which is normally closed to isolate storage of refueling from storage of diurnal vapors. The method for fuel vapor control includes selectively actuating the fuel tank isolation valve during interrelated routines for refueling, fuel vapor purging, and emission system leak detection diagnostics to improve regulation of pressure and vacuum the HEV fuel vapor recovery system.
摘要:
A method and system for fuel vapor control in a hybrid vehicle (HEV). The HEV fuel vapor recovery system includes a fuel tank isolation valve, which is normally closed to isolate storage of refueling from storage of diurnal vapors. The method for fuel vapor control includes selectively actuating the fuel tank isolation valve during interrelated routines for refueling, fuel vapor purging, and emission system leak detection diagnostics to improve regulation of pressure and vacuum the HEV fuel vapor recovery system.
摘要:
A method and system for fuel vapor control in a hybrid vehicle (HEV). The HEV fuel vapor recovery system includes a fuel tank isolation valve, which is normally closed to isolate storage of refueling from storage of diurnal vapors. The method for fuel vapor control includes selectively actuating the fuel tank isolation valve during interrelated routines for refueling, fuel vapor purging, and emission system leak detection diagnostics to improve regulation of pressure and vacuum the HEV fuel vapor recovery system.
摘要:
A method for operating an engine with a fuel reformer is presented. In one embodiment a first fuel is reformed into a gaseous fuel comprising H, CO, and CH4. The engine is operated by injecting the gaseous fuel and a second fuel to a cylinder of the engine in response to an available amount of gaseous fuel, engine speed and engine load. Further, an engine actuator may be adjusted to vary cylinder charge in response to the available amount of gaseous fuel.
摘要:
A system for filtering and oxidizing particulate matter produced by a gasoline direct injection engine is disclosed. In one embodiment, engine cylinder air-fuel is adjusted to allow soot to oxidize at an upstream particulate filter while exhaust gases are efficiently processed in a downstream catalyst.
摘要:
A system and method for storing and purging fuel vapors for an internal combustion engine comprising a compressor is presented. The system allows the canister to be purged even while the engine is operated at high engine load.
摘要:
Fuel systems and methods for controlling fuel systems in a vehicle with multiple fuel tanks are provided. An exemplary vehicle fuel system includes a first fuel tank including a first pressure sensor, and a second fuel tank. The system may further include a fuel tank isolation valve positioned to selectively decouple the first fuel tank and the second fuel tank. The system may further include an electronic controller configured to identify which of the first fuel tank and second fuel tank includes a fuel system leak by selectively decoupling the first fuel tank and the second fuel tank via the fuel tank isolation valve, responsive to an identification of the fuel system leak.
摘要:
A system and method for storing and purging fuel vapors for an internal combustion engine comprising a compressor is presented. The system allows the canister to be purged even while the engine is operated at high engine load.