FUEL SUPPLY DEVICE AND RETURN FUEL UTILIZATION BUFFER JAR

摘要

A fuel supply device includes a return fuel utilization buffer jar that conducts fuel into a fuel inlet port of a first three-way valve including a one-way check valve to allow the fuel to flow, uni-directionally, from the fuel inlet port to a fuel outlet port. Return fuel from an engine is conducted in through a return fuel inlet port of the return fuel utilization buffer jar. Fuel vapor in the return fuel utilization buffer jar is guided from a gas inlet port of a second three-way valve through a gas outlet port to a fuel tank. Vapor pressure in the return fuel utilization buffer jar is regulated by a ventilation port that is mounted in the second three-way valve and includes a one-way check valve in a direction toward the gas inlet port.

主权项

1. A fuel supply device, which is applicable to supplying fuel necessary for an operation of a rotary high-pressure fuel distribution engine, comprising:
a first three-way valve, which comprises a fuel inlet port, a fuel outlet port, and a return fuel receiving port, a reversal flow prevention device being arranged between the fuel inlet port and the fuel outlet port so as to constrain fuel to flow, in one direction, from the fuel inlet port to the fuel outlet port, the fuel outlet port and the return fuel receiving port being connected to and in communication with each other; a second three-way valve, which comprises a gas inlet port, a gas outlet port, and a ventilation port, a one-way reversal flow prevention device being arranged between the ventilation port and the gas inlet port for constraining flow in one direction from the ventilation port to the gas inlet port, the gas inlet port and the gas outlet port being connected to and in communication with each other; and a return fuel utilization buffer jar, which comprises a hollow jar portion and a buoy arranged in interior of the hollow jar portion, the hollow jar portion having a lower portion in which a return fuel inlet port and a return fuel outlet port in communication with the interior are formed, the hollow jar portion having an upper portion in which a fuel vapor recovery hole in communication with the interior is formed, wherein the return fuel inlet port functions to conduct in return fuel from the rotary high-pressure fuel distribution engine and vapor of the return fuel vapor is conducted out, from the fuel vapor recovery hole, via the gas inlet port of the second three-way valve and wherein when a liquid level of the return fuel in the hollow jar portion is higher than a threshold level, the buoy is moved by buoyance to open a passage so as to allow the return fuel in the hollow jar portion to flow from the return fuel outlet port, through the return fuel receiving port of the first three-way valve, to the rotary high-pressure fuel distribution engine.