Process for the load-dependent control of a hydraulic drive for

Details Process for the load-dependent control of a hydraulic drive for Process for the load-dependent control of a hydraulic drive for

1987-07-01

1989-02-14

Koczo, Michael

Internal-combustion engines

Charge forming device

Supercharger

60608, 60487, F02B 3908

Patent

active

048039691

ABSTRACT:
A process for the load-dependent control of a hydraulic drive for a compressor arranged at an internal-combustion engine, the compressor being driven by a hydraulic motor that, in turn, is acted upon by pressure from a hydraulic pump, the internal-combustion engine itself driving the hydraulic pump. In order to ensure a relatively high compressor speed as early as during the idling operation of the internal-combustion engine, and have available an optimal torque for a positive load change, while keeping minimal the additional fuel consumption required for the hydraulic drive, during the idling operation of the internal-combustion engine, the hydraulic pump is adjusted into the full-delivery position and the hydraulic motor is adjusted into the minimum intake position. Upon a subsequent positive load change, after an indicated hydraulic motor control pressure is reached, the hydraulic motor is guided into the maximum intake position, and after an indicated hydraulic pump control pressure is reached, the hydraulic pump is guided into the direction of the minimum delivery position. After an indicated charging pressure limit is reached, the hydraulic drive is disconnected from the compressor. Also described is an arrangement for carrying out this process.

REFERENCES:
patent: 2774342 (1956-12-01), Schilling
patent: 3473322 (1969-10-01), Wolf
patent: 3869866 (1975-03-01), Timoney
patent: 4083188 (1978-04-01), Kumm

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