Fuel injection pump
AssigneeYanmar Co., Ltd.
InventorsMasamichi Tanaka, Tohru Ogawa, Satoshi Hattori
Life of this patent
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Abstract
A fuel injection pump 100 comprises a thermoelement CSD 47 for advancing injection timing in a cold temperature condition. The CSD 47 uses a piston 46 for opening and closing a sub port 42 formed in a plunger barrel 8. An electronic governor 2 is provided with a mechanism for decreasing an injected fuel quantity when an engine starts in a cold temperature condition. The mechanism shifts a rack position in a fuel-decrease direction in a cold temperature condition, and switches the rack position to a normal position in a normal temperature condition. A timing TR for shifting the rack position is set before or simultaneous to a timing TC for switch-off of the CSD 47.
Claims11
A fuel injection pump comprising:
- a plunger barrel;
- a sub port for overflow of fuel formed in the plunger barrel;
- a cold start device for advancing injection timing in a cold temperature condition, the cold start device using a piston for opening and closing the sub port;
- and
- a governor, wherein the governor performs cold governing for decreasing injected fuel so as to decrease an injected fuel quantity at a time of engine start in a cold temperature condition.
Dependencies are inferred from the claim text.