Title:
CAM, FUEL INJECTION PUMP, AND ENGINE
Document Type and Number:
WIPO Patent Application WO/2021/167078
Kind Code:
A1
Abstract:
The purpose of the present invention is to increase the pressure of fuel while reducing an increase in the maximum lift amount of a cam and deterioration of a fuel injection ability. This cam for use in a fuel injection pump that increases the pressure of fuel supplied into a fuel supply chamber by an axial movement of a plunger. The cam includes a first cam surface that causes an increase rate of an axial speed of the plunger when the cam rotates at a constant speed, in a pre-stroke period until the plunger increases the pressure of the fuel in the fuel supply chamber, to be a first increase rate, and a second cam surface that causes the increase rate of the axial speed of the plunger when the cam rotates at the constant speed, in a pressure increasing period that is a period from a start of increasing the pressure of the fuel in the fuel supply chamber by the plunger, to be a second increase rate, wherein the first increase rate is set higher than the second increase rate.
Inventors:
OGAWA HISAO (JP)
Application Number:
PCT/JP2021/006412
Publication Date:
August 26, 2021
Filing Date:
February 19, 2021
Export Citation:
Assignee:
MITSUBISHI HEAVY IND ENGINE & TURBOCHARGER LTD (JP)
International Classes:
F02M59/10; F16H53/02
Foreign References:
| JPH0893595A | 1996-04-09 | |||
| JPH04191420A | 1992-07-09 | |||
| JPH05340321A | 1993-12-21 | |||
| JPH08100740A | 1996-04-16 | |||
| JPH04191420A | 1992-07-09 |
Other References:
See also references of EP 4080038A4
Attorney, Agent or Firm:
SAKAI INTERNATIONAL PATENT OFFICE (JP)
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