Title:
【発明の名称】ダンパ付油圧式吸排気弁駆動装置
Document Type and Number:
Japanese Patent JP2870682
Kind Code:
B2
Abstract:
A hydraulic intake/exhaust valve drive unit with a damper includes a working cylinder (2) to which a working oil is supplied; a piston (4) for driving an intake or exhaust valve of an internal combustion engine by being reciprocated in the working cylinder (2); and a damper provided in the working cylinder (2) for controlling the speed of the intake or exhaust valve. The damper further includes: a first damper member (11, 31) having a projecting portion (13, 32) provided in the top portion of the working cylinder (2) to which the working oil is supplied; a second damper member (22) including a recessed portion (21), the second damper member (22) being moved in the working cylinder (2) together with the piston (4) accompanied by the reciprocating motion of the intake or exhaust valve, the recessed portion (21) being fitted to the projecting portion (13, 32) of the first damper member (11, 31) on closing the intake or exhaust valve for forming an oil chamber (23) with the first damper member (11, 31); and a valve unit (14, 33) provided in the first damper member (11, 31), which is opened on opening the intake or exhaust valve for introducing the working oil into the oil chamber (23).
Inventors:
OOKAWACHI KYOSHI
OOHIRA HIROSHI
IWAZAWA KATSUZO
ABE TOMOJI
OKETANI TOSHUKI
OOHIRA HIROSHI
IWAZAWA KATSUZO
ABE TOMOJI
OKETANI TOSHUKI
Application Number:
JP27449993A
Publication Date:
March 17, 1999
Filing Date:
November 02, 1993
Export Citation:
Assignee:
NITSUTAN BARUBU KK
NIIGATA TETSUKOSHO KK
NIIGATA TETSUKOSHO KK
International Classes:
F01L1/16; F01L9/10; F02B3/06; (IPC1-7): F01L9/02
Domestic Patent References:
| JP6085208A | ||||
| JP6193214A | ||||
| JP6298709U |
Attorney, Agent or Firm:
Nishimura Norimitsu