ENGINE ROTATING SPEED CONTROL FOR TRACTOR

Japanese Patent JP3134917

B2

PURPOSE: To avoid extreme speed reduction at work time, and secure safety at travel switching time by selecting reduction in engine rotating speed at raising operation time of a work machine, and controlling it at reverse operation time of a forward-reverse lever.
CONSTITUTION: A controller EC reduces engine rotating speed when a raising- lowering switch SW1 is operated so as to be raised since it is regarded as raising time of a work machine in a turning time judgment at ON time of a low speed turning setting switch SW3. When control to reduce engine rotating speed at turning time is performed at low speed work time, since turning speed becomes too slow, only when the low speed turning setting switch SW3 is turned on, engine rotating speed is controlled to be reduced at turning time. That is, when the low speed turning setting switch SW3 is turned off, the speed is set as preset speed of a turning speed accelerator lever. When a reverser lever is switched to a reverse position, a low speed reverse setting switch SW6 is turned on, and the work machine is raised, and the engine rotating speed is reduced, and safety is secured.

Tomofumi Ochi
Katsunori Kato
Akira Sasao
Takashi Furuta

JP5297095A

February 13, 2001

March 13, 1995

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Yanmar Diesel Co., Ltd.

A01B67/00; F02B65/00; F02D11/10; F02D29/00; F02D29/04; (IPC1-7): F02D29/00; A01B67/00; F02B65/00; F02D11/10; F02D29/04

JP242146A
JP6276807A
JP1195933A
JP616123U
JP673349U
JP310048U
JP646407U
JP613930U

Juichiro Yano

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