Speed control method for working vehicle

Details Speed control method for working vehicle Speed control method for working vehicle

2007-10-02

2007-10-02

Ho, Ha (Department: 3681)

Interrelated power delivery controls, including engine control

Transmission control

Transmission controlled by engine

C477S042000

Reexamination Certificate

active

11157928

ABSTRACT:
A working vehicle in which while an operation degree of a speed change operation member is increased from 0 to a certain value, the increase of the vehicle traveling speed is produced by a first increase rate of an engine rotation speed and a first increase rate of a speed ratio (output/input rotation speed ratio of a speed change mechanism) and while the operation degree of the speed change operation member is increased from the certain value, the engine rotation speed is kept to be the rated value and corresponding thereto, the increase rate of the speed ratio is set to a second increase rate of the speed ratio larger than the first increase rate of the speed ratio so that the vehicle traveling speed is always increased substantially in proportion to the acceleration operation of the speed change operation member.

REFERENCES:
patent: 4122732 (1978-10-01), Chana
patent: 4263826 (1981-04-01), Hartz et al.
patent: 4659321 (1987-04-01), Miyawaki
patent: 5014574 (1991-05-01), Sasajima et al.
patent: 5362286 (1994-11-01), Satoh et al.
patent: 5368530 (1994-11-01), Sanematsu et al.
patent: WO 03/036138 (2003-05-01), None

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