| 摘要 |
A control system for ignition timing and exhaust gas recirculation which includes a vacuum controller operated by a power source of negative pressure to advance the ignition timing, an EGR valve operated by a power source of negative pressure to recirculate the exhaust gas, a temperature sensing valve sensing an engine temperature which introduces atmosphere to the vacuum controller as well as to the EGR valve when the engine temperature is low, a pressure control valve which introduces the atmosphere by a flow ratio substantially in inverse proportion to a pressure of the exhaust gas, and a negative pressure line which introduces a negative pressure at a portion in a carburetor at an upstream side from a throttle valve to the vacuum controller and the EGR valve, whereby the vacuum controller and the EGR valve are controlled in connection with each other.
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