An ECM determines a failure exist and a failure site in a control valve device from first and second failure diagnoses. In the first failure diagnosis, a failure is determined to have occurred if an opening amount that represents an absolute value of a difference between a detected opening amount and a target opening amount of a valve body is greater than a preset threshold when the target opening amount of the valve body is constant for a predetermined time. In the second failure diagnosis, a failure is determined to have occurred if an opening amount that represents the absolute value of the difference between the opening amount of the valve body when fully open or fully closed and the detected opening amount is greater than the preset threshold when a portion rotating integrally with the valve body has been pressed against a stopper continuously for a predetermined time.

A throttle grip apparatus includes a throttle grip, an interlocking member which includes engaged parts to be engaged with engaging parts formed on the throttle grip and is rotatable in conjunction with rotation of the throttle grip, a first biasing unit which biases the interlocking member when the throttle grip rotates in a normal direction, a second biasing unit which biases the interlocking member when the throttle grip rotates in a reverse direction. The engaging parts and the engaged parts are formed respectively on the throttle grip and the interlocking member at regular intervals along a rotation direction of the throttle grip, and the second biasing unit is installed at each of positions between the engaged pans of the interlocking member.

Systems and methods for adaptive throttle filtering are disclosed. One method includes receiving vertical acceleration data indicative of a plurality of vertical accelerations of a machine, receiving first throttle pedal data indicative of a plurality of throttle pedal movements, determining a filter factor based at least on the vertical acceleration data, filtering the first throttle pedal data, based at least on the filter factor, to determine second throttle pedal data, and causing the second throttle pedal data to be transmitted to a controller to effectuate control of an operation of an engine.

A throttle assembly for an engine may include a remote throttle lever, a sensor, and a terminal. The remote throttle lever may be coupled physically to a user input device and operable to be moved under control of the user input device. The sensor is configured to detect a position of the remote throttle lever and generate an output signal indicative of the position of the remote throttle lever. The terminal configured to provide the output signal to a controller of the engine.

An engine air induction control system having throttle valve assembly is disclosed, the throttle valve assembly having a streamlined divergent-convergent valve member slidingly mounted within a divergent-convergent valve chamber defined by a wall of a throttle body. The streamlined valve member is moveable towards and away from an inlet passage of the throttle body by an actuator mechanism to vary an annular air flow area defined between the valve member and the wall defining the valve chamber.

A throttle control system and method for use with a vehicle. The throttle control system receives an input voltage from a vehicle throttle controller. The throttle control system prepares a throttle signal and provides the throttle signal to the throttle to force deceleration to a selected speed or constrain acceleration to a selected value. Preparing the throttle signal may follow detection of maximum threshold values of speed or input voltage. The maximum threshold values may be specific to the location of the vehicle. The throttle signal and the maximum threshold values may be defined with reference to the input voltage, vehicle speed, vehicle location, or other parameters. The throttle signal may force deceleration or constrain acceleration incrementally to mitigate loss of vehicle throttle controller responsiveness to driver commands. The throttle signal may be an output voltage provided to a vehicle electronic control module.

A first control unit executes a valve stop inertial running including stopping an intake valve and an exhaust valve in a closed state during rotation of an output shaft, stopping supply of fuel to an engine, and setting a clutch in an engaged state to drive pistons of the engine by a rotational force from driving wheels. A second control unit executes a valve operation running including operating the intake valve and the exhaust valve during the rotation of the output shaft, and supplying the fuel to the engine based upon an intake conduit pressure. When a cancellation request is made during execution of the valve stop inertial running, a transient control unit operates the intake valve and the exhaust valve, and controls a throttle valve to an idling opening or less, thereby supplying a negative pressure to an intake passage.

An object of the present application invention is to provide a throttle valve control device capable of effectively cooling a bearing of a throttle shaft while preventing an increase in size of a throttle body. Therefore, in a throttle valve control device in which flow paths 5T1 to 5T3 through which a heat exchange medium flows are formed in a throttle body 5, the diameter of a first bearing 8 of a throttle shaft 3 is greater than the diameter of a second bearing 9, the flow paths 5T1 to 5T3 are disposed along an outer periphery of an intake passage 1 to overlap with the second bearing 9 when viewed from a flow direction of the intake passage 1, and an inlet portion 5T1 and the outlet portion 5T3 of the flow paths 5T1 to 5T3 are disposed to sandwich the first bearing 8.

In a drive force transmission device, a shock-absorbable rubber is placed between a driving-side rotatable body and a driven-side rotatable body. A bridge portion is placed at a deep side of a holding recess of the shock-absorbable rubber and connects between a primary damper portion and a secondary damper portion. At least one cut part penetrates through the bridge portion in an axial direction of the shock-absorbable body and extends in a radial direction of the shock-absorbable body.

In the intake air quantity control device, a ring-shaped convex portion having an outer diameter being smaller than an inner diameter of the wave washer for damping the drive motor is formed on the bottom surface of the cylinder-shaped hole of the throttle body, and tapered portions are provided at an outer-diameter corner of the ring-shaped convex portion and at an outer-diameter corner of the bottom surface of the cylinder-shaped hole of the throttle body.