Back to results
US 2012/0233998 A1Published application
Control system for hybrid construction machine
AssigneeKayaba Industry Co., Ltd.
InventorsHaruhiko Kawasaki, Masahiro Egawa
Life of this patent
Estimating the term…
Abstract
A regeneration switching valve which communicates with a neutral flow path and a tank at a normal position and cuts off communication between the neutral flow path and the tank to cause the neutral flow path to communicate with a hydraulic motor for power generation at a switched position is provided in at least one of first and second circuit systems including a plurality of control valves.
Claims4
A control system for hybrid construction machine, comprising:
- a pair of variable-capacity first and second main pumps, the discharge amounts of which are controlled by a control mechanism;
- first and second circuit systems connected to the first and second main pumps;
- a hydraulic motor for power generation which rotates when oil discharged from at least one of the first and second main pumps is supplied;
- a generator coupled to the hydraulic motor for power generation;
- a battery which stores power generated by the generator;
- a plurality of control valves provided in the first and second circuit systems;
- a tank;
- a neutral flow path which introduces the oil discharged from the first and second main pumps to the tank when all of the plurality of control valves are at neutral positions;
- and
- a regeneration switching valve which is provided in at least one of the first and second circuit systems, communicates with the neutral flow path and the tank at a normal position, and cuts off communication between the neutral flow path and the tank at a switched position to cause the neutral flow path to communicate with the hydraulic motor for power generation.
7 more elements
Dependencies are inferred from the claim text.