| 摘要 |
A high-pressure fuel injection system for injecting high-pressure gaseo us fuel from a gaseous fuel supply into cylinders of an engine. The injection system comprises an oil reservoir of hydraulic oil, a hydraulic oil supply of hydraulic oil at a pressure higher than the oil reservoir, and a gas/oil separator located in a safe location remote from the cylinders of the engine. The gas/oil separator is adapted to separate any gaseous fuel from the hydraulic oil, and return the separate d oil to the oil reservoir. A plurality of high-pressure, fuel-injector valve assemblies inject fuel into the cylinders of the engine; each fuel-injector valve assembly including an electrohydraulic valve and a fuel injector. The electrohydraulic valve is connected to the high-pressure hydraulic oil supply, the oil reservoir and a n electronic controller providing electrical control signals, and the electrohydraulic valve creates successive hydraulic signals in response to electrical control signals. The fuel injector includes a fuel valve operated by a piston, and an outlet port in communication with the gaseous fuel supply. The piston reciprocates the fuel valve in response to hydraulic signals to open and close the outlet port, an d thereby successively injects gaseous fuel into the cylinder. Each fuel- injector valve assembly further includes means for collecting leakage of oil and leakage of gaseous fuel, and communicates any such leaked oil and leaked gas to the gas/oil separator.
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