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Title:
FUEL SUPPLY SYSTEM OF INTERNAL COMBUSTION ENGINE
Document Type and Number:
Japanese Patent JP2014222029
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a fuel supply system of an internal combustion engine that can restraint pulsation of fuel pressure efficiently on a low-pressure side during an idle operation and at the time of return from a fuel-cut condition.SOLUTION: A fuel supply system of an internal combustion engine includes: a feed pump 22 that feeds fuel to an engine 1 possessing a low-pressure fuel injection mechanism 29 and a high-pressure fuel injection mechanism 39; and a high-pressure fuel pump 31 that is mechanically driven by the engine 1 and pressurizes fuel fed from the feed pump 22 to feed it to the high-pressure fuel injection mechanism 39. A pulsation damper 51 that can damp at least pulsation of fuel pressure due to operation of the high-pressure fuel pump 31 is provided at a passage section 25a on a side of the high-pressure pump 31 in a low-pressure fuel passage 25c between the high-pressure fuel pump 31 and the low-pressure fuel injection mechanism 29. In addition, a throttle element 52 that reduces a passage sectional area partially is provided at a passage section 25c1 on a side closer to the low-pressure fuel injection mechanism 29 than the pulsation damper 51 in the low-pressure fuel passage 25c.

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Inventors:
YUASA TAKAO
Application Number:
JP2013100978A
Publication Date:
November 27, 2014
Filing Date:
May 13, 2013
Export Citation:
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Assignee:
TOYOTA MOTOR CORP
International Classes:
F02M55/02; F02M37/00
Domestic Patent References:
JP2008157094A2008-07-10
JP2007270682A2007-10-18
JP2002089401A2002-03-27
JP2007016795A2007-01-25
JP2007285129A2007-11-01
JP2008180169A2008-08-07
JP2012002171A2012-01-05
JP2012193626A2012-10-11
Foreign References:
WO2012053055A12012-04-26
Attorney, Agent or Firm:
Ariga Army Ichiro
Eiichiro Ariga



 
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