To further reduce a pump driving force by allowing control of a smaller discharge rate in an oil pump with a variable flow rate including a lubrication pump and a control pump.
The control pump 35 includes a plurality of oil pumps 36, 37 having respectively different discharge rates, and has an oil path switching valve 51 for switching a communication state between discharge ports 36c, 37c of the control pump 35 and an oil supply channel 67 leading to each part of an engine. One of the respective oil pumps 36, 37 is a main pump 36 that always communicates with the oil supply channel 67 leading to each part of the engine. The other of the respective oil pumps 36, 37 is a sub-pump 37 that is switched to whether or not to communicate with the oil supply channel 67 by an operation of the oil path switching valve 51. The discharge rate of the sub-pump 37 is set to be larger than the discharge rate of the main pump 36.
MIYAJIMA JUNICHI
KAWAMATA NORIYUKI
MITSUBORI TOSHIMASA
INO SATORU
HONDA MOTOR CO LTD
JP2008223755A | 2008-09-25 | |||
JPH01145909U | 1989-10-06 |
Tadashi Takahashi
Yoshifumi Saeki
Suzuki Mitsuyoshi
Kazuya Nishi
Yasuhiko Murayama