Drive system for machines and vehicles, with a hydraulic and mec

Details Drive system for machines and vehicles, with a hydraulic and mec Drive system for machines and vehicles, with a hydraulic and mec

1989-02-15

1990-07-10

Diehl, Dwight

Machine element or mechanism

Gearing

With fluid drive

74878, F16H 4706

Patent

active

049399543

ABSTRACT:
A drive system for machines and vehicles with a hydraulic and mechanical transmission arranged thereafter having a driving motor and a control member which can continuously vary the speed of the motor. A hydraulic converter also controlled by a control member dependent upon the speed of the driving motor and the running pressure of the motor is also provided, in which a transmission arranged after the converter and a shifting mechanism is connected to an electronic control circuit so that an operating element for shifting gears of the transmission may achieve a comfortable shifting behavior for the transmission. Shifting from a high gear to a low gear will occur only under the following conditions: (a) before shifting, the output speed of the hydraulic converter is below a certain predetermined value, and (b) before shifting, the transmission ratio of the converter reaches a specific minimum value caused by the working pressure of the motor.

REFERENCES:
patent: 3463034 (1969-08-01), Miller
patent: 3713351 (1973-01-01), Sakakibara et al.
patent: 3864991 (1975-02-01), Nembach
patent: 4079638 (1978-03-01), Sibeud
patent: 4193323 (1980-03-01), Bubula et al.
patent: 4334441 (1982-06-01), Iwanaga et al.
patent: 4341133 (1982-07-01), Sakamoto
patent: 4480502 (1984-11-01), Nembach
patent: 4528871 (1985-07-01), Nembach
patent: 4643048 (1987-02-01), Hattori et al.
patent: 4766779 (1988-08-01), Massy
patent: 4776233 (1988-10-01), Kita et al.
patent: 4815334 (1989-03-01), Lexen

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