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Working machine

  • US 20050012337A1
  • Filed: 11/28/2002
  • Published: 01/20/2005
  • Est. Priority Date: 12/03/2001
  • Status: Active Grant
First Claim
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1. A self-traveling working machine in which electric motors are driven as a power source both by a power generator driven by an engine and a power storage means for storing a surplus power from the power generator, and a working device and a traveling device are activated by the electric motors, characterized in that the working machine is operated with an operation mode selected from a normal operation mode that the engine is operated over a high efficiency range with both an output from the power generator and an accumulated power stored in the power storage means, and a high-output operation mode that the engine is operated at a higher output than at the normal operation mode.

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