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Control system for hybrid construction machine

  • US 9,127,438 B2
  • Filed: 02/17/2011
  • Issued: 09/08/2015
  • Est. Priority Date: 02/23/2010
  • Status: Expired due to Fees
First Claim
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1. A control system for construction machine, comprising:

  • a pair of first and second main pumps which are variable-displacement pumps;

    first and second circuit systems connected to the first and second main pumps and including a plurality of control valves;

    main switching valves provided between the first and second circuit systems and the first and second main pumps;

    a hydraulic motor for power generation connected to the first and second main pumps via the main switching valves;

    a generator coupled to the hydraulic motor for power generation; and

    a battery for storing power generated by the generator;

    wherein when at least the main switching valve connected to one circuit system is at a position to cause one main pump connected thereto to communicate with the hydraulic motor for power generation, the main switching valve connected to the other circuit system causes the other main pump to communicate with the other circuit system.

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