Hybrid driven hydraulic work machine
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
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Jun 30, 2015
Grant Date -
Jan 8, 2015
app pub date -
Oct 18, 2012
filing date -
Oct 19, 2011
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A hybrid-driven hydraulic work machine maintains the torque of the engine at a prescribed value when the load on a hydraulic pump is higher than the rated power of the engine and the electric assist motor assists the torque of the engine. Control of the engine revolution speed is based on the target revolution speed of the engine; engine load calculation; and at least one of: electric motor power running calculation which calculates a differential revolution speed between the target engine revolution speed and the revolution speed of the engine and performs power running control on the electric assist motor depending on the differential revolution speed when the engine load is a prescribed value or higher; and a hydraulic pump absorption torque calculation which performs reduction control on absorption torque of the hydraulic pump depending on the differential revolution speed when the engine load is a prescribed value or higher.
First Claim
Family
International Classification(s)
- B60K:ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF ....
- H02J:CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR D....
- B60W:CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT....
- G05B:CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTION....
- F02D:CONTROLLING COMBUSTION ENGINES
- E02F:DREDGING; SOIL-SHIFTING
- [Classification Symbol]
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