Title:
HIGH-PRESSURE FUEL PUMP
Document Type and Number:
WIPO Patent Application WO/2021/084715
Kind Code:
A1
Abstract:
A high-pressure fuel pump wherein the pressurization timing of the high-pressure fuel pump can be set at unequal intervals, a cam lobe of a plunger-driving cam is formed in a continuous manner such that there are no discontinuous sections in a cam curved surface and the operation of the plunger is regular, and the high-pressure fuel pump is highly precise for an unequal interval two-cylinder internal combustion engine, while also maintaining an operating characteristic of the high-pressure fuel pump. A reciprocating high-pressure fuel pump 8 in which a plunger 82 is made to operate opposite from a cam lobe 6a of a plunger-driving cam 6 that is provided on a camshaft 41 to which the power of a crankshaft 31 of an internal combustion engine 3 is transmitted, wherein: the cam lobe has a cam curved surface 60 comprising two highest sections 61 at a cam angle interval of 180° and two lowest sections 62 at a cam angle interval of 180°, and connecting the highest sections and the lowest sections in an alternating order; and when viewed in the direction of the camshaft axis Y, the angle θ of intersection of a first imaginary line L connecting the two highest sections and a second imaginary line M connecting the two lowest sections 62 is not a right angle.
Inventors:
INUI HIROATSU (JP)
OKANO NORIAKI (JP)
KONUMA TAKAYUKI (JP)
OKANO NORIAKI (JP)
KONUMA TAKAYUKI (JP)
Application Number:
PCT/JP2019/042911
Publication Date:
May 06, 2021
Filing Date:
October 31, 2019
Export Citation:
Assignee:
HONDA MOTOR CO LTD (JP)
International Classes:
F02M59/10
Foreign References:
| JP2001263198A | 2001-09-26 | |||
| JP2001041128A | 2001-02-13 | |||
| JP2019138170A | 2019-08-22 | |||
| JP2009144727A | 2009-07-02 | |||
| CN205858433U | 2017-01-04 |
Attorney, Agent or Firm:
KAMIZAWA, Junko et al. (JP)
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