| 摘要 |
<p>A multi-intake valve type engine in which first intake air passage (7a) for normal operation and a second intake air passage (7b) for high power operation connect the combustion chamber (5) of an internal combustion engine (1) with the outer atmosphere, is provided with an improved intake control system for the engine (1). This improved intake control system provides a control valve (19) in the second intake air passage (7b), which control valve (19) is closed during a low-speed or load running operation and opens during the high power operations of the engine (1). The first and second intake air passages (7a, 7b) are made to have communication downstream of said control valve (19) and in the vicinity of the combustion chamber (5) through a communication port (7c). Preferably, there is provided in said first intake air passage (7a), downstream of the throttle valve (16), a manually-operated valve (18) which opens and closes in response to said throttle valve (16). An interlock mechanism (25-29), can be interposed between said throttle valve (16) and said manually-operated valve (18) so that when the throttle valve (16) is opened said manually-operated valve (18) will open fully before the throttle valve (16) becomes wide-open.</p> |
