| 摘要 |
Engine suction is applied for controlling admission of atmospheric air into a vacuum chamber of an EGR control valve so as to reduce the degree of opening of the EGR control valve during low load running of the engine, and concurrently the vacuum in a venturi of a carburetor is applied for controlling the admission of atmospheric air into the vacuum chamber so as to increase the degree of opening of the EGR control valve during high load running of the engine. |
