Aisin Seiki Kabushiki Kaisha

Toyota Jidosha Kabushiki Kaisha

Mitsuo Kikkawa

Masaru Shimizu

Shoichi Doi

Tadashi Terazawa

Tomomitsu Terakawa

Shinichiro Tanaka

Yoshinori Taguchi

Tatsuo Kato

Keiji Aoki

Masaharu Hayashi

Ichiro Hosotani

Yoshifumi Yamada

A vehicle driving force control apparatus which can reduce a driver's embarrassment at difference in accelerator feeling when the driver switches from a constant speed cruise mode to an ordinary variable speed drive mode, and which allows the use of engine brake even while constant speed cruise is requested. The apparatus comprises a switch for constant speed cruise, an accelerator sensor, a brake sensor, a current speed sensor, and a cruise condition judging function for deciding that cruise conditions are satisfied when constant speed cruise is requested, the accelerator pedal is not depressed, and the brake pedal is not depressed, and deciding that the cruise conditions are not satisfied in other cases. It updates target vehicle speed with current vehicle speed when the cruise conditions are not satisfied or on the instant when the cruise conditions are changed from dissatisfied to satisfied and sets controlled output so that current vehicle speed reaches the target vehicle speed. The controller also sets the controlled output when the cruise conditions are satisfied and selects controlled output based only on depression on the accelerator pedal by the driver when the cruise conditions are not satisfied. A throttle valve controls a sucked air amount of an engine based on the selected controlled output.

Vehicle driving force control apparatus

A throttle control apparatus carries out electronic throttle control, wherein a throttle valve is opened and closed by a motor actuated in accordance with depression of an accelerator pedal. It includes an accelerator lever actuated by the accelerator pedal, a throttle lever provided with the throttle valve, a motor lever actuated by the motor so as to operate the throttle lever in a valve-opening direction and in a valve-closing direction, a limp home lever, and an urging spring for urging the motor lever and the throttle lever in the valve-closing direction. The limp home lever is held rotatably on the throttle lever so as to rotate to an engagement position where it can mechanically engage with the accelerator lever and to a siding position where it cannot mechanically engage therewith. The urging spring also actuates the limp home lever so as to rotate to the siding position when electronic throttle control is carried out by the motor, and actuates it so as to rotate to the engagement position when electronic throttle control is not carried out by the motor.

Throttle control apparatus

A throttle control apparatus includes a throttle opening adjusting device for regulating the throttle valve opening in such a manner that the throttle valve is located in a first position for assuring sufficient opening of the throttle valve upon ignition, with the throttle valve being rotatable after establishment of ignition or combustion. The throttle valve is then moved to a second position located between the first position and a fully closed position upon an electric failure.

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.

A throttle control apparatus includes an accelerator operation mechanism, a driving source generating driving force in response to at least an operation amount of the accelerator operation mechanism, a throttle shaft fixing a throttle valve of an internal combustion engine thereto and supported on a housing so as to be able to rotate, an electromagnetic clutch mechanism being intermittent a connection between the throttle shaft and the driving source and having a dog clutch which transmits the driving force of the driving source to the throttle shaft and a driving control device for controlling the electromagnetic clutch and the driving source and opening and closing the throttle valve. According to this constitution, when the electromagnetic clutch mechanism operates, the driving source is connected with the throttle shaft via the dog clutch and the driving force of the driving source is immediately transmitted to the throttle shaft. Therefore, it is able to obtain a good response performance and it is able to improve the durability. Furthermore, the electromagnetic clutch mechanism may be provided with an electromagnetic coil, a rotor and a movable member. In this case, when the throttle control apparatus is constituted so as to transmit the driving source via outer teeth which are connected with the driving source and which are formed on outer circumferential edge portion of the rotor and the nail portions which are formed on the rotor and the movable member adjacent to the outer teeth, the throttle control apparatus can be made lighter and smaller.

A throttle control apparatus includes an accelerator operation mechanism, a driving source, a throttle shaft fixing a throttle valve, a supporting member fixed to the throttle shaft, a rotor supported on the throttle shaft and connected with the driving source so as to be rotated by the driving source, a movable member movably supported on the throttle shaft in the axial direction of the throttle shaft between the rotor and the supporting member, a connection member connecting the movable member with the supporting member, an electromagnetic coil attracting the movable member under the exciting condition for connecting the movable member with the rotor, an engaging member fixed to the movable member and extending toward the axial direction of the throttle shaft, an operation member having an end surface which can be engaged with the engaging member and connected with the accelerator operation mechanism so as to be able to rotate in response to the accelerator. The throttle control apparatus is constituted so as not to engage the engaging member with the operation member under the exciting condition of the electromagnetic coil. Therefore, in the acceleration slip control, the driving source is controlled in response to the slip condition and throttle shaft is rotated by the driving source regardless of the accelerator. The engagement between the rotor and the movable member is released under the abnormal condition and the engaging member is engaged with the operation member. Thereby, the throttle shaft is directly driven in response to the operation of the accelerator.

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Anjo, Japan

Mitsuo Kikkawa