| 摘要 |
PROBLEM TO BE SOLVED: To provide an EGR volume control device capable of supplying stable mixed gas to a sudden change in the exhaust gas recirculating (EGR) volume, while miniaturizing the device. SOLUTION: An exhaust gas passage for forming a part of an exhaust gas recirculating passage is arranged in an intake passage on the downstream of an electrically controlling intake control valve (a throttle valve) with a full opening position as an initial position, and an exhaust gas recirculating volume control valve is arranged in the passage. These control valves are installed in one body, and are driven by separate motors via two sets of speed reduction gear mechanisms arranged in the body. A base board of a motor control circuit and a turning angle sensor are incorporated into a resin cover for covering the speed reduction gear mechanisms. The center distance of the respective control valves is minimized, and the whole device is miniaturized, and controllability of the EGR ratio is improved. COPYRIGHT: (C)2007,JPO&INPIT
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