Title:
【発明の名称】内燃機関の動弁制御装置
Document Type and Number:
Japanese Patent JP2890236
Kind Code:
B2
Abstract:
A valve-operation control system for an internal combustion engine includes a timing transmitting device for transmitting the rotational power of a crankshaft at a speed reduction ratio of 1/4 to a cam shaft (11), and intake-side and exhaust-side valve operating devices. Each of the valve operating device includes a first cam (41) provided on the cam shaft (11) and having a single cam lobe (41b) protruding outwardly with a valve-opening profile suitable for an extremely low-speed operation of the engine, a second cam (42) provided on the cam shaft (11) and having a pair of cam lobes (42b) provided at locations circumferentially spaced apart through 180 degree to protrude outwardly with an opening profile suitable for a low-speed operational state of the engine, a third cam (43) provided on the cam shaft and having a pair of cam lobes (43b) provided at locations circumferentially spaced apart through 180 degree to protrude outwardly with an opening profile suitable for a high-speed operational state of the engine, with first, second and third rocker arms (45,46,47) following the first, second and third cams (41,42,43), respectively. A connection switchover device (70,71) is provided in the first, second and third rocker arms for switching the selective connection and disconnection of the rocker arms in accordance with the operational state of the engine. The first rocker arm (45) is operatively connected to the intake or exhaust valves for operation of the valves in an 8-cycle mode to inhibit the discharge of a harmful hydrocarbons at an extremely slow speed of the engine.
Inventors:
OIKAWA TOSHIHIRO
NAKAYAMA YUKIO
NAKAJIMA KENJI
NAKAYAMA YUKIO
NAKAJIMA KENJI
Application Number:
JP2920394A
Publication Date:
May 10, 1999
Filing Date:
February 28, 1994
Export Citation:
Assignee:
HONDA GIKEN KOGYO KK
International Classes:
F02B75/02; F01L1/08; F01L1/26; F01L1/38; F01L13/00; F01N3/20; F01N3/24; F02B69/06; F02D13/02; (IPC1-7): F01L13/00; F01L13/00; F01L1/38; F02B75/02; F02D13/02
Domestic Patent References:
| JP4279728A | ||||
| JP60153431A | ||||
| JP2264123A | ||||
| JP4194330A | ||||
| JP62558A | ||||
| JP4224213A | ||||
| JP6317836U | ||||
| JP46709U |
Attorney, Agent or Firm:
Ken Ochiai (1 person outside)