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:
Sep. 04, 2007
Filed:
Jun. 27, 2005
Kazuyuki Tokuda, Toyota, JP;
Naoki Kurata, Nishikamo-gun, JP;
Katsuhiko Yamaguchi, Nisshin, JP;
Toshio Inoue, Gotenba, JP;
Naoto Suzuki, Fujinomiya, JP;
Mamoru Tomatsuri, Toyota, JP;
Keiko Hasegawa, Toyota, JP;
Keita Fukui, Toyota, JP;
Kazuyuki Tokuda, Toyota, JP;
Naoki Kurata, Nishikamo-gun, JP;
Katsuhiko Yamaguchi, Nisshin, JP;
Toshio Inoue, Gotenba, JP;
Naoto Suzuki, Fujinomiya, JP;
Mamoru Tomatsuri, Toyota, JP;
Keiko Hasegawa, Toyota, JP;
Keita Fukui, Toyota, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Abstract
A low-pressure delivery pipe provided with intake manifold injectors, a fuel pressure regulator, a high-pressure fuel pump, a high-pressure delivery pipe provided with in-cylinder injectors, and an electromagnetic relief valve are connected in series at the downstream of a low-pressure fuel pump that discharges a fuel within a fuel tank at a prescribed pressure. Since the low-pressure delivery pipe is arranged downstream of the low-pressure fuel pump, the fuel pressure within the low-pressure delivery pipe is lowered upon stop of vehicle operation, in response to stop of the low-pressure fuel pump. The fuel pressure within the high-pressure delivery pipe is also lowered in response to stop of the low-pressure fuel pump, by opening the electromagnetic relief valve upon stop of vehicle operation. Thus, oil tightness of the injectors during the stop of vehicle operation is ensured.