Title:
HIGH PRESSURE FUEL PUMP
Document Type and Number:
Japanese Patent JP2001041128
Kind Code:
A
Abstract:
To preferably reduce an operating noise related to closing of a spill valve even when an internal combustion engine is in the low load operation state such as idling operation state.
The cam profile of a cam 25 for driving a high pressure fuel pump is asymmetric between an intake stroke and an injection stroke. To be concrete, the cam angle θ1 in the injection stroke is made larger than the cam angle θ2, so that even if the driving shaft is rotated at a constant speed, the time required for the injection stroke becomes longer, so the volume change speed of the pressure chamber in the injection stroke is lessened.
Inventors:
YAMAZAKI DAICHI
SUGIYAMA MASANORI
KURATA NAOKI
SUGIYAMA MASANORI
KURATA NAOKI
Application Number:
JP21421799A
Publication Date:
February 13, 2001
Filing Date:
July 28, 1999
Export Citation:
Assignee:
TOYOTA MOTOR CORP
International Classes:
F02M37/06; F02M39/00; F02M59/10; F02M59/36; F02M59/44; F02M63/02; F04B9/04; (IPC1-7): F02M59/10; F02M37/06; F02M59/36; F02M59/44
Attorney, Agent or Firm:
Hironobu Onda
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