Title:
DIESEL ENGINE FUEL SYSTEM USING DIMETHYL ETHER FUEL
Document Type and Number:
Japanese Patent JP3456689
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To prevent the diffusion of dimethyl ether into the atmosphere with certainty by generating a required pressure differential in each phase of the starting, driving and stopping of a diesel engine using a dimethyl ether fuel, and recovering the excessive or surplus fuel at each section of a fuel system.
SOLUTION: At the time of engine starting, a tank solenoid valve 2 is opened, and a dimethyl ether(DME) fuel is fed to an injection nozzle 5 of the engine from a fuel tank 1 via a fuel solenoid valve 4 by operation of a booster pump 3. At the time of engine driving, when the output value of a pressure sensor 6 in a trunk loop becomes higher than that of a pressure sensor 10 of the fuel tank 1, a fuel return solenoid valve 7 is opened, the overflow fuel out of the engine injection nozzle 5 is made to flow back to the fuel tank 1. Moreover, at the time engine stopping, operation of the booster pump 3 is continued, and each of return solenoid valves 9, 8 and 11 of those of first to third bypasses is opened, whereby the residual fuel in this fuel system is put back to the fuel tank 1.
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Inventors:
Yoshikazu Murakami
Seiji Hikino
Seiji Hikino
Application Number:
JP26620897A
Publication Date:
October 14, 2003
Filing Date:
September 30, 1997
Export Citation:
Assignee:
Hino Motors Ltd.
International Classes:
F02M37/00; F02D1/02; F02D45/00; (IPC1-7): F02M37/00; F02D1/02; F02D45/00
Domestic Patent References:
| JP1122590A |
Attorney, Agent or Firm:
Kazuo Shamoto (5 outside)
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