| 摘要 |
FIELD: engines and pumps.SUBSTANCE: fuel feed system for heavy fuel spray systems with common discharge pipeline for internal combustion engines includes tank, main feed pump for supply of heavy fuel from tank to high pressure pump connected at least by means of one high pressure pipeline to high pressure accumulator (discharge pipeline), which feeds at least one injector, and besides, blowdown valve connected to high pressure accumulator by means of a separate high pressure pipeline for supply at least of some amount of heavy fuel back to the tank by means of return pipeline. Blowdown valve includes a valve component that is provided with possibility of being displaced between open and closed positions, high pressure connection for high pressure pipeline interconnected with high pressure heavy fuel accumulator (discharge pipeline), low pressure connection for return pipeline and actuators for bringing the valve component into action. Valve component seat is made in the form of a sliding seat.EFFECT: invention allows improving fuel feed system so that wear of valve seat and its consequences can be reduced, and service life and operating safety of blowdown valve used in such fuel feed system can be improved.9 cl, 3 dwg |
