Response control system for hydrostatic-mechanical transmissions

Details Response control system for hydrostatic-mechanical transmissions Response control system for hydrostatic-mechanical transmissions

1995-02-15

1997-09-23

Park, Collin W.

Boots, shoes, and leggings

475 76, 475 80, 60448, F16D 3102

Patent

active

056711379

ABSTRACT:
A response control system for a hydrostatic-mechanical transmission. In this system, it is determined in digging/moving operation whether an actual speed ratio which is the ratio of the revolution speed of the output shaft to the revolution speed of the power source is equal to a specified value or less, and if so, a target speed ratio which is a target value for the ratio of the revolution speed of the output shaft to the revolution speed of the power source is set, limiting the amount of change in the target speed ratio per unit time. Based on the target speed ratio thus set, the angle of at least either of discharge controlling swash plates is controlled, thereby reducing vehicle acceleration at the primary stage of digging. In order to slow down the response to a change in load during digging operation, a constant indicating the response to a change in engine revolution is set small in proximity to a target engine revolution speed. With this arrangement, the response of the transmission to a change in load during digging operation can be retarded.

REFERENCES:
patent: 5406793 (1995-04-01), Maruyama et al.
patent: 5419128 (1995-05-01), Asano et al.
patent: 5522775 (1996-06-01), Maruyama et al.
patent: 5524436 (1996-06-01), Ishino et al.
patent: 5529546 (1996-06-01), Ishino et al.
patent: 5531304 (1996-07-01), Ishino et al.
patent: 5540051 (1996-07-01), Maruyama et al.

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