Vehicle stepless transmission

A technology of speed changer and speed change mechanism, which is applied to mechanical equipment, components with teeth, belts/chains/gears, etc., which can solve the problems of fuel consumption rate, deterioration of driving performance, and long duration, etc., so as to suppress the increase of cost , The effect of preventing the deterioration of fuel consumption and drivability

Active Publication Date: 2008-03-26
HONDA MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this way, a gear ratio that is not suitable for the operating state is set, and the vehicle is driven, which may lead to deterioration of fuel consumption and driving performance.
In particular, the sensor that detects the rotation speed of the wheel tends to last for a long time because it does not use the rotating parts of the transmission mechanism for failure detection.

Method used

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  • Vehicle stepless transmission
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Examples

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Embodiment Construction

[0015] Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a configuration diagram of a power unit PU of a four-wheeled vehicle equipped with a control device according to the present invention. This vehicle is a two-wheel drive vehicle in which the left and right front wheels FW1 and FW2 serve as driving wheels DRW, and the power unit PU includes: a composite drive source PW having an engine E and a motor / generator M; The continuously variable transmission TM that shifts the gear stepwise and transmits it to the drive wheels DRW.

[0016] The engine E is a reciprocating engine in which pistons are provided in each of the cylinder chambers 11, 11, . gas exhaust device 12; fuel supply device 13 for supplying fuel to each cylinder chamber 11, 11, ...; and ignition device (illustration omitted) for igniting the fuel supplied to each cylinder chamber 11, 11, .... The motor / generator M is provided on the engin...

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Abstract

A speed change control device carries out speed change control of a stepless speed change mechanism in accordance with the vehicle speed. The speed change control device includes: first vehicle speed selection means for comparing a first vehicle speed obtained from the rotation speed of an output member (26) of the stepless speed change mechanism and a second vehicle speed obtained from the rotation speed of the wheels and for selecting the lower of the first and second vehicle speeds as the substitute vehicle speed; and second vehicle speed selection means for comparing the third vehicle speed obtained from the output side rotation speed of a clutch mechanism and the substitute vehicle speed, and for selecting the higher of the third vehicle speed and the substitute vehicle speed as the control vehicle speed. The control vehicle speed is used as the vehicle speed V for carrying out speed change control.

Description

technical field [0001] The present invention relates to a continuously variable transmission for a vehicle, comprising a speed change mechanism for changing the speed of an engine output and transmitting it to the wheels, and a speed change mechanism according to the speed of the vehicle and the opening degree of the throttle valve or accelerator pedal of the engine The variable speed control device for the variable speed control. Background technique [0002] Various schemes have been proposed in the past regarding the speed change control of continuously variable transmissions for vehicles. For example, the following schemes are known. One scheme is to set a target value of the engine rotation speed according to the vehicle speed, and to perform control to change the transmission ratio so that The actual engine rotation speed is consistent with the target value. Another option is to set the target value of the speed ratio of the continuously variable transmission mechanism...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H59/00F16H59/24F16H59/36F16H9/04F16H9/00F16H59/18F16H59/40F16H59/42F16H61/12F16H61/66F16H61/662
CPCF16H59/24F16H61/662F16H61/12F16H9/18F16H59/48F16H2061/122F16H59/36F16H2061/1284
Inventor 江口高弘藏田武嗣竹森祐一郎原靖裕
Owner HONDA MOTOR CO LTD
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