The invention is directed to a throttle control apparatus for use in an internal combustion engine. The apparatus includes an accelerator operating mechanism, a driving source, and a supporting member secured to an end portion of a throttle shaft extending out of a housing. A rotor is rotatably mounted on the throttle shaft, and connected with the driving source to be rotated thereby. A movable member is mounted on the throttle shaft between the rotor and the supporting member to be axially movable. A connecting member is disposed for connecting the movable member with the supporting member, and biasing the former toward the latter. An electromagnetic coil is disposed to face the rotor. There is provided an engaging member which has a base end mounted on the movable member for supporting the engaging member rotatably within a predetermined angle range. A driving member having an end face engageable with the engaging member is mounted rotatably about an axis parallel with the axis of the throttle shaft, and connected with the accelerator operating mechanism. The engaging member has an axial length engageable with the end face of the driving member only when the movable member is positioned at the side of the supporting member.

Throttle control apparatus

An electronic throttle control system having a housing 22 with a motor 40 , throttle valve 60 , gear mechanism 100 , and failsafe mechanism. A main spring member 130 positioned between the housing 22 and a gear mechanism 104 , which in turn is attached to the throttle valve shaft 62 , biases the throttle plate 60 towards the closed position. A spring-biased default mechanism 132, 134 biases the throttle plate 60 from its closed position to a default or “limp-home” position.

Electronic throttle return mechanism with a two-spring and two-lever default mechanism

An electronic throttle control system is described having a housing (22) with a motor (40), throttle valve (60), gear mechanism (48,102,104), and fail-safe mechanism (104,132,134). A spring member (132) attached to a gear member (104) and default lever (134), and which is biased when the throttle valve (60) is in its fully open and closed positions, operates to open the throttle valve in the event of an electric failure, thus allowing the vehicle to limp home. The spring member (132), default lever (134) and associated gear member (104) are interfit together as a group and inserted in the housing (22) as a subassembly (140), thus improving assembly time and expense.

Electronic throttle control system

An electronic throttle control system having a housing with a motor, throttle valve, gear mechanism, and fail-safe mechanism. A spring member attached to a gear member and default lever, and which is biased when the throttle valve is in its fully open and closed positions, operates to open the throttle valve in the event of an electric failure, thus allowing the vehicle to limp home. An adjustable pin member is used to adjust the position of the default lever and thus the throttle valve in a fail-safe situation.

Electronic throttle control with adjustable default mechanism

The present invention relates to an electronic throttle control system having a housing (22) with a motor (40), throttle valve (60), gear mechanism (100), and failsafe mechanism (130). A spring member (150) attached between the housing (22) and a gear member (104) attached to the throttle valve shaft (62) biases the throttle plate (60) towards the closed position. A spring-biased plunger member (134) biases the throttle plate (60) from its closed position to a default or "limp-home" position.

Electronic throttle control system with two-spring failsafe mechanism

A load adjustment device is provided having a throttle valve which determines the output of an internal combustion engine and is connected, fixed for rotation, to a throttle-valve shaft (32) which is mounted in a throttle-valve-shaft housing (30). The shaft has an acceleration-pedal side mechanical articulation side (33) and a setting-motor articulation side (34) with which there is associated a coupling element (45) for the mechanical uncoupling of the throttle-valve shaft from the setting motor within a defined angular region of the throttle valve; furthermore, a device is provided for reporting the instantaneous position of the coupling element to an electronic control device. In order, in the case of such a two-sided control of the throttle valve, to permit a structurally simple report of the position of the electric setting motor to the accelerator-pedal-side articulation side, the throttle-valve shaft is developed as a tube and the reporting device has a pass-through shaft (48) which passes through the throttle-valve shaft, a first transmission member (49) which is connected, fixed for rotation, with the pass-through shaft and the coupling element on the setting-motor articulation side and, on the accelerator-pedal-side articulation side, a second transfer member (50) which is connected, fixed for rotation, with the pass-through shaft and which cooperates with an actual-value detection device (18) associated with the control device.

Load adjustment device

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Load adjustment device