Koda and Androlia
Apparatus for controlling idling revolution speed of internal combustion engine
 An apparatus for controlling idling revolution speed of an internal combustion engine in which air at an upstream side of a throttle valve of an intake tube of the internal combustion engine is injected nearby a fuel injection valve from an injection port provided in an intake manifold of the internal combustion engine through a bypass passage and a flow rate control device. The flow rate control device is provided with a valve housing and a valve seat retaining member having a cylindrical wall disposed within the valve housing and a valve body which is moved forwardly and backwardly by a stepping motor is seated on a valve seat. A flow space is formed between the valve seat and an outlet port provided in the valve housing for communicating thereof with the injection port. The flow space includes an annular or semi-annular space formed between the valve housing and the valve seat retaining member and provides a long folded air flow passage to remove oil mist and dust from the air flowing toward the injection port. 
Aisan Kogyo Kabushiki Kaisha
F
F02M
inventional
Kinya Katsuyoshi
Kato Fukaya