Internal-combustion engines – Poppet valve operating mechanism – With means for varying timing
Patent
1995-06-07
1997-01-14
Lo, Weilun
Internal-combustion engines
Poppet valve operating mechanism
With means for varying timing
123198F, 123308, F01L 1300, F02D 1306
Patent
active
055929079
ABSTRACT:
In a valve operating system for a multi-cylinder internal combustion engine, which is capable of closing and stopping operation of both of a pair of intake valves in a cylinder to provide a stopped state of a cylinder, intake valves are independently operatively connected to first and second driving rocker arms which abut against a pair of stopping portions provided in a completely circular shape without a cam lobe on a cam shaft. A first free rocker arm is provided and abuts against a substantially stopping cam, and a second free rocker arm is provided and abuts against an operating cam. A first connection switch-over device is provided in the first driving rocker arm and the first free rocker arm, and a second connection switch-over device is provided in the second driving rocker arm and the second free rocker arm. A third connection switch-over device is provided in the first driving rocker arm, the second driving rocker arm and the second free rocker arm. Thus, it is possible to substantially close and stop only one of the intake valves in a low speed range of the engine to produce a swirl through the other intake valve, thereby improving the combustibility and the specific fuel consumption.
REFERENCES:
patent: 5207193 (1993-05-01), Sugimoto et al.
patent: 5388552 (1995-02-01), Sugimoto et al.
patent: 5456225 (1995-10-01), Oikawa et al.
patent: 5495832 (1996-03-01), Fujii et al.
Hasebe Tetsuya
Kumagai Kazuhide
Honda Giken Kogyo Kabushiki Kaisha
Lo Weilun
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