Control system for hybrid construction machine

Control system for hybrid construction machine

  • CN 102,695,866 A
  • Filed: 02/01/2011
  • Published: 09/26/2012
  • Est. Priority Date: 02/12/2010
  • Status: Active Application
First Claim
Patent Images

1. the control system of a hybrid construction machine possesses:

  • The variable-displacement main pump;

    Motor, it drives above-mentioned main pump;

    The engine speed control device, it controls the rotation of above-mentioned motor;

    Generator;

    Battery, it will carry out electric power storage by the electric power that above-mentioned generator for electricity generation produces;

    The variable-displacement auxiliary pump, it is connected the discharge side of above-mentioned main pump, and auxiliary above-mentioned main pump;

    Auxiliary controls, it is controlled so that the auxiliary output that the output of above-mentioned auxiliary pump is indicated;

    Memory section, it stores following content;

    the coefficient table of auxiliary correction factor, this auxiliary correction factor are used for the above-mentioned auxiliary controls of control under the situation that charge capacity at above-mentioned battery is lower than threshold value so that the auxiliary output of above-mentioned auxiliary pump reduces;

    The coefficient table of engine speed correction factor, this engine speed correction factor are used for improving under the situation that charge capacity at above-mentioned battery is lower than above-mentioned threshold value the rotating speed of above-mentioned motor;

    And the above-mentioned threshold value that is directed against the charge capacity of above-mentioned battery;

    AndControl device;

    Whether its charge capacity of judging above-mentioned battery is lower than above-mentioned threshold value;

    Charge capacity at above-mentioned battery is lower than under the situation of above-mentioned threshold value;

    Control above-mentioned auxiliary controls so that the auxiliary output of above-mentioned auxiliary pump reduces according to above-mentioned auxiliary correction factor;

    And control above-mentioned engine speed control device so that the rotating speed of above-mentioned motor increases according to above-mentioned engine speed correction factor, thus the discharge capacity of above-mentioned main pump is increased, improve the amount that auxiliary output reduced of rotating speed above-mentioned auxiliary pump of above-mentioned motor so that the output of above-mentioned main pump is risen.

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