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:
Jun. 11, 2002
Filed:
Oct. 22, 1999
Takanobu Kawano, Nishio, JP;
Tohru Yoshinaga, Okazaki, JP;
Katsuyuki Tanaka, Nishio, JP;
Kenji Kanehara, Toyohashi, JP;
Yoshihiro Nakase, Okazaki, JP;
Masaki Takeyama, Okazaki, JP;
Yoichi Sugiura, Okazaki, JP;
Katsuhiko Aoyama, Nukata-gun, JP;
Toshio Imamura, Okazaki, JP;
Other;
Abstract
A damping chamber is formed in a pressure relaxation device connected to a high pressure fuel pipe. Valve bodies are provided at openings of partitions, and a spring force is applied to the valve bodies by a spring in a valve closing direction. When a high pressure portion reaches an inlet of the damping chamber, the valve body opens to hold and absorb the high pressure portion in the damping chamber. When a low pressure portion reaches the inlet of the damping chamber, the high pressure portion held in the damping chamber is gradually released via a restricted orifice to cancel the low pressure portion, thereby reducing the pressure pulsation of fuel.