The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 23, 2000
Filed:
Aug. 09, 1999
Nobuhiko Koga, Susono, JP;
Susumu Kojima, Susono, JP;
Keiso Takeda, Mishima, JP;
Kosuke Suzui, Susono, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Abstract
A device for controlling fuel injection into an internal combustion engine is disclosed. The device comprises an accumulator for supplying pressurized fuel to a fuel injection valve, a high-pressure pump for discharging fuel into the accumulator using the engine as a power source, and a low-pressure pump for discharging fuel into the high-pressure pump using a power source other than the engine. At the start of the engine, the fuel discharged from the low-pressure pump is substantially directly introduced into the accumulator through a pump chamber of the high-pressure pump. To elevate the pressure within the accumulator for a short period to a fuel pressure capable of injecting fuel at the start of the engine, an opening and closing valve is provided in a suction passage that communicates the discharge side of the low-pressure pump with the suction side of the high-pressure pump, and is maintained to be opened at the start of the engine.