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Operating apparatus for a working industrial vehicle

  • US 20070161456A1
  • Filed: 01/03/2007
  • Published: 07/12/2007
  • Est. Priority Date: 01/12/2006
  • Status: Active Grant
First Claim
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1. An operating apparatus for a working industrial vehicle, comprising:

  • an engine;

    a generator motor;

    a two-way clutch provided between the engine and the generator motor;

    an electricity storage means;

    a load driven by at least one of the engine and the generator motor;

    a working load detecting means for detecting the magnitude of a resistance load during operation of the load; and

    a control means electrically connected to the engine, the generator motor, the two-way clutch, the electricity storage means, and the working load detecting means,wherein the control means switches the generator motor between a generator mode in which driving force of the engine is transmitted to the generator motor through the two-way clutch to generate power to be stored in the electricity storage means, and an electric motor mode in which the generator motor is supplied with driving power from the electricity storage means to function as an electric motor,wherein the two-way clutch can be switched between a first state in which transmission of driving force from the engine to the generator motor is allowed and in which transmission of driving force from the generator motor to the engine is prevented, and a second state in which the transmission of the driving force from the generator motor to the engine is allowed and in which the transmission of the driving force from the engine to the generator motor is prevented,wherein when the resistance load detected by the working load detecting means is small, the control means sets the two-way clutch to the first state, sets the engine in one of a stopped state and an idling state, and sets the generator motor to the electric motor mode so that the load is driven to conduct operation,wherein when, during the operation, the working load detecting means detects an increase in the resistance load in excess of a predetermined level, the control means starts an increase in RPM of the engine while increasing an output of the generator motor in the electric motor mode, andwherein when the RPM of the engine becomes equal to the RPM of the generator motor, the two-way clutch in the first state is automatically connected, and the driving force of the engine is transmitted to the load through the two-way clutch.

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