Air flow rate control apparatus

A motor driven throttle valve system comprising:

• a throttle body in which a throttle valve is mounted;
• a recess portion provided adjacent said throttle valve for housing therein a motor for driving said throttle valve;
• and
• a through hole for communicating said recess portion the outside thereof, through which an electric wire extends from said motor to the outside.

A motor driven throttle valve system comprising:

• a throttle body with an air intake passage;
• a throttle valve element disposed in said air intake passage for changing an effective cross sectional area of said passage
• a throttle shaft rotatably mounted in said throttle body for swinging said throttle valve element;
• a motor for driving said throttle shaft through gear means provided on one end portion of said throttle shaft;
• a position sensor provided on the other end portion of said throttle shaft for detecting a rotational displacement of said shaft;
• a recess portion provided in said throttle body adjacent said throttle valve element for housing therein a motor for driving said throttle valve;
• a through hole for communicating said recess portion with the outside thereof, through which an electric wire extends from said motor to the outside;
• a cover member attached to said throttle body for covering said position sensor, through which electric wires from said motor and said position sensor extend out of the system.

A motor driven throttle valve system comprising:

• a body provided therein with an air intake passage;
• a shaft rotatably mounted in said body;
• a throttle valve element fixedly mounted to said shaft for changing an effective cross sectional area of said passage in accordance with a swing of said shaft;
• a cover attached to said body to define therebetween a space;
• a sensor disposed within said space for detecting an angular displacement of said shaft;
• a motor mounted to said body;
• a mechanism for transmitting a rotational torque from said motor to said shaft;
• and
• a connector mounted to said cover, said connector including an output terminal of said sensor and an input terminal of said motor means.

An air flow rate control apparatus for controlling an amount of air to be taken into an engine, comprising:

• a control valve disposed within an air flow passage through which said air flows;
• a body defining a portion of said air flow passage and rotatably accommodating said control valve;
• a cover attached to said body;
• a motor driven means for driving said control valve to a predetermined opening degree;
• a detector for detecting a rotational position of a valve shaft to which said control valve is mounted as an opening degree of said control valve, said detector disposed at an end portion of said valve shaft opposite to said motor driven means;
• and
• an interface portion for allowing an electrical data exchange between said detector and said driven means, and the outside of said apparatus through said interface portion, said interface portion disposed at the same side of said valve shaft as said detector is.

A throttle valve system comprising:

• a throttle body with an air intake passage;
• a throttle valve element disposed in said air intake passage for changing an effective cross sectional area of said passage;
• a throttle valve shaft rotatably mounted on a bearing in said throttle body for swinging said throttle valve element;
• a first metal bushing press-fitted at an outer periphery thereof to a recess portion of said throttle body and coaxially said throttle shaft;
• and
• a throttle position sensor, said sensor including:
• a sensor element;
• a second metal bushing fitted to said first metal bushing to support said sensor element;
• a slider rotatably mounted to said second metal bushing;
• a transmitting member provided between said throttle valve shaft and said slider thereby said slider is rotated by said throttle valve shaft;
• a conductive element provided on the surface of said throttle position sensor element;
• and
• a slider element mounted on said slider for providing electrical contact to said conductive element.

A motor driven throttle valve system comprising:

• a throttle body with an air intake passage;
• a throttle valve element disposed in said air intake passage for changing an effective cross sectional area of said passage;
• a throttle valve shaft rotatably mounted in said throttle body for swinging said throttle valve element;
• a motor for driving said throttle valve shaft through gear means provided on one end portion of said throttle valve shaft;
• a throttle position sensor provided on the other end portion of said throttle valve shaft for detecting a rotational displacement of said throttle valve shaft;
• a recess portion provided in said throttle body adjacent said throttle valve element for housing therein said motor;
• a microcomputer electrically connected to said throttle position sensor and said motor;
• and
• a cover member attached to said throttle body for covering said throttle position sensor and said microcomputer.