Abstract: An electrically-controlled throttle valve apparatus includes a motor, a speed reducing mechanism for reducing rotation speed transmitted from the motor, a throttle valve connected to the speed reducing mechanism, and a force applying device applying force to the throttle valve in the direction of returning the valve to its initial position and adjusting the opening of the throttle valve by driving the motor. Parameters of the motor, the speed reducing mechanism, and the force applying device have values such that the operation time t from the minimum to the maximum throttle valve opening, which is determined by an evaluation equation obtained from equations of throttle valve motion, is less than a prescribed target throttle valve operation time t*. Furthermore, resistance and an induction voltage constant of the motor are determined to satisfy a constraint equation obtained based on Ohm's law.

Abstract: An electrically-controlled throttle valve apparatus includes a motor, a speed reducing mechanism for reducing rotation speed transmitted from the motor, a throttle valve connected to the speed reducing mechanism, and a force applying device applying force to the throttle valve in the direction of returning the valve to its initial position and adjusting the opening of the throttle valve by driving the motor. Parameters of the motor, the speed reducing mechanism, and the force applying device have values such that the operation time t from the minimum to the maximum throttle valve opening, which is determined by an evaluation equation obtained from equations of throttle valve motion, is less than a prescribed target throttle valve operation time t★. Furthermore, resistance and an induction voltage constant of the motor are determined to satisfy a constraint equation obtained based on Ohm's law.

Abstract: A returning spring 7 of the electronic control throttle and a default spring 8 for securing an initial opening degree (default opening degree) of the throttle valve 3 have diameters different from each other, and both of the springs 7, 8 are held around a shaft of the throttle valve shaft 3 and arranged between a gear 43 attached to the throttle valve shaft 3 and a wall portion of the throttle body 100. A shaft supporting gap of the throttle valve shaft 3 is filled with an air leak preventing material, and a minimum opening degree on control purpose of the throttle valve is set to a value larger than an amount of overshoot of the throttle valve occurring when opening degree of the throttle valve is changed from a maximum opening degree on control purpose of the throttle valve to the minimum opening degree.

Abstract: An electronic control throttle device includes a throttle body, a motor case containing a motor composing an electric drive actuator, and a containing portion of a connector plugged into a motor terminal provided in an end plate of said motor, formed as a unit. A motor terminal extracting port exposing the motor terminal to the containing portion is formed on a bottom portion of the motor case and a guide for guiding the connector to the motor terminal extracting port when the connector is plugged into the motor terminal is formed on an inner wall surface of the containing portion. A space containing a throttle sensor is provided at one end of a throttle valve shaft being formed in one room and a wire lead of the sensor is directed to the containing portion of the motor terminal connector.

Abstract: An electrically-controlled throttle valve apparatus includes a motor, a speed reducing mechanism for reducing rotation speed transmitted from the motor, a throttle valve connected to the speed reducing mechanism, and a force applying device applying force to the throttle valve in the direction of returning the valve to its initial position and adjusting the opening of the throttle valve by driving the motor. Parameters of the motor, the speed reducing mechanism, and the force applying device have values such that the operation time t from the minimum to the maximum throttle valve opening, which is determined by an evaluation equation obtained from equations of throttle valve motion, is less than a prescribed target throttle valve operation time t*. Furthermore, resistance and an induction voltage constant of the motor are determined to satisfy a constraint equation obtained based on Ohm's law.

Abstract: A returning spring 7 of the electronic control throttle and a default spring 8 for securing an initial opening degree (default opening degree) of the throttle valve 3 have diameters different from each other, and both of the springs 7, 8 are held around a shaft of the throttle valve shaft 3 and arranged between a gear 43 attached to the throttle valve shaft 3 and a wall portion of the throttle body 100. A shaft supporting gap of the throttle valve shaft 3 is filled with an air leak preventing material, and a minimum opening degree of the throttle valve is set to a value larger than an amount of overshoot of the throttle valve occurring when opening degree of the throttle valve is changed from a maximum opening degree of the throttle valve to the minimum opening degree.

Abstract: An electric drive actuator opens and closes a throttle valve to control an intake air flow rate of the internal combustion engine. A motor case contains a motor constituting the electric drive actuator and a gear case contains a gear mechanism to transmit power of the motor to the throttle valve shaft. A motor inserting port of the motor case is opened to the gear case. The motor is attached to the motor case by fastening a motor bracket to screw holes with three screws. Three sides forming a contour of the motor bracket are curved lines. A motor positioning portion being fitted to the three curved lines of the motor bracket to position the motor is formed in the gear case.

Abstract: To achieve an integration of components and the rationalization of the default opening mechanism of the throttle valve, a reduction of the load of the motor drive and a stabilization of the throttle control operation.

Abstract: To achieve an integration of components and the rationalization of the default opening mechanism of the throttle valve, a reduction of the load of the motor drive and a stabilization of the throttle control operation.

Abstract: The invention provides a throttle valve control apparatus provided with a throttle sensor which is in trouble at a low possibility and has a long service life, whereby an accurate output of a throttle opening degree can be obtained. The throttle valve control apparatus of an internal combustion engine has a throttle opening degree sensor constituted by an non-contact sensor using hole elements.

Abstract: A returning spring 7 of the electronic control throttle and a default spring 8 for securing an initial opening degree (default opening degree) of the throttle valve 3 have diameters different from each other, and both of the springs 7, 8 are held around a shaft of the throttle valve shaft 3 and arranged between a gear 43 attached to the throttle valve shaft 3 and a wall portion of the throttle body 100. A shaft supporting gap of the throttle valve shaft 3 is filled with an air leak preventing material, and a minimum opening degree on control purpose of the throttle valve is set to a value larger than an amount of overshoot of the throttle valve occurring when opening degree of the throttle valve is changed from a maximum opening degree on control purpose of the throttle valve to the minimum opening degree.

Abstract: A returning spring 7 of the electronic control throttle and a default spring 8 for securing an initial opening degree (default opening degree) of the throttle valve 3 have diameters different from each other, and both of the springs 7, 8 are held around a shaft of the throttle valve shaft 3 and arranged between a gear 43 attached to the throttle valve shaft 3 and a wall portion of the throttle body 100. A shaft supporting gap of the throttle valve shaft 3 is filled with an air leak preventing material, and a minimum opening degree on control purpose of the throttle valve is set to a value larger than an amount of overshoot of the throttle valve occurring when opening degree of the throttle valve is changed from a maximum opening degree on control purpose of the throttle valve to the minimum opening degree.

Abstract: A returning spring 7 of the electronic control throttle and a default spring 8 for securing an initial opening degree (default opening degree) of the throttle valve 3 have diameters different from each other, and both of the springs 7, 8 are held around a shaft of the throttle valve shaft 3 and arranged between a gear 43 attached to the throttle valve shaft 3 and a wall portion of the throttle body 100. A shaft supporting gap of the throttle valve shaft 3 is filled with an air leak preventing material, and a minimum opening degree on control purpose of the throttle valve is set to a value larger than an amount of overshoot of the throttle valve occurring when opening degree of the throttle valve is changed from a maximum opening degree on control purpose of the throttle valve to the minimum opening degree.

Abstract: A returning spring 7 of the electronic control throttle and a default spring 8 for securing an initial opening degree (default opening degree) of the throttle valve 3 have diameters different from each other, and both of the springs 7, 8 are held around a shaft of the throttle valve shaft 3 and arranged between a gear 43 attached to the throttle valve shaft 3 and a wall portion of the throttle body 100. A shaft supporting gap of the throttle valve shaft 3 is filled with an air leak preventing material, and a minimum opening degree on control purpose of the throttle valve is set to a value larger than an amount of overshoot of the throttle valve occurring when opening degree of the throttle valve is changed from a maximum opening degree on control purpose of the throttle valve to the minimum opening degree.

Abstract: An electrically-controlled throttle valve apparatus includes a motor, a speed reducing mechanism for reducing the rotation speed that is transmitted from the motor, a throttle valve connected to the speed reducing mechanism, and a force applying arrangement for applying force to the throttle valve in the direction of returning the valve to its initial position and for adjusting the opening of the throttle valve by driving the motor. Specification parameters of the motor, the speed reducing mechanism, and the force applying arrangement have values such that the operation time t from the minimum opening to the maximum opening of the throttle valve, which is determined by an evaluation equation obtained from equations of motion of the throttle valve, is less than a prescribed target operation time t* of the throttle valve. Furthermore, the resistance and the induction voltage constant of the motor are determined so as to satisfy a constraint equation obtained based on Ohm's law.

Abstract: When the power source of a motor is turned off, a cam connected to the motor is held at an initial default stopping position by a return spring generating a torque in one direction and a throttle valve connected to a cam via an arm, and a valve gear is held at a corresponding default opening position. When the motor rotates and generates its torque, the arm first closes the throttle valve to a prescribed minimum opening and then opens the throttle valve in the fully open direction.

Abstract: In an initial opening degree setting mechanism which keeps an initial opening degree of a throttle valve (24) larger than that of a fully closed position thereof when no current is supplied to a motor (12) for driving a throttle shaft (18) for the throttle valve (24), a throttle lever (3) and a sleeve (45) are inserted into the throttle shaft (18) and secured thereto and a sleeve (42) integrated with a return lever (2) is fitted over the sleeve (45) so as to permit a relative rotational mevement with respect to the sleeve (45). The sleeve (42) is urged by a return spring (4) in the direction of closing the throttle valve (24) upto the position of the initial opening degree. With the urging force the return lever (2) is placed to be engageable with the throttle lever (3).

Abstract: To achieve an integration of components and the rationalization of the default opening mechanism of the throttle valve, a reduction of the load of the motor drive and a stabilization of the throttle control operation. In a default opening setting mechanism with which the default opening of the throttle valve 24 is maintained to be larger than the fully closed position when the electric current does not pass through the motor 12 driving the throttle shaft 18, the throttle lever 3 and the sleeve 45 are inserted and fixed, and the sleeve 42 united together with the return lever 2 is engaged with the sleeve 45 so as to be enabled to rotate in relative to the sleeve 45. The sleeve 42 is energized by the return coil in the close direction of the throttle valve 24 up to the initial opening position. This energized operation enables the return lever 2 to be coupled with the sleeve 3.

Abstract: An initial opening degree setting mechanism keeps an initial opening degree of a throttle valve larger than that of a fully closed position thereof when no current is supplied to a motor for driving a throttle shaft for the throttle valve. A throttle lever and a sleeve are inserted into the throttle shaft and secured thereto, and a sleeve integrated with a return lever is fitted over the sleeve so as to permit a relative rotational mevement with respect to the sleeve. The sleeve is urged by a return spring in the direction of closing the throttle valve up to the position of the initial opening degree. With the urging force, the return lever is placed to be engageable with the throttle lever. The throttle shaft has a valve opening force applied by a spring for keeping the initial opening degree of the throttle valve near the fully closed position thereof.

Abstract: An intake valve control apparatus for an internal combustion engine eliminates adverse effects due to accumulation of deposit materials downstream of the throttle valve to always ensure a smooth movement of the throttle valve. The apparatus has a body member forming an intake air passage and a throttle valve rotatably mounted therein. The throttle valve has a first outer circumference which rotates toward the upstream side thereof and a second outer circumference which rotates toward the downstream side thereof. A wall surface inside the body member opposite the first outer circumference of throttle valve is spherical, and wall surface of the body member opposite the second outer circumference of the throttle valve is cylindrical.