US 2004/0169481 A1Published application

Engine operated machine

AssigneeHonda Motor Co., Ltd.

InventorsTsutomu Wakitani, Toshiaki Kawakami, Toshinori Inagawa, Yoshihisa Shinogi

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Abstract

The invention makes an output sharing of an engine and an electric motor proper so as to suitably drive a load. When a throttle opening degree variation amount ΔV is within a ΔV1, an engine E can drive a power generator G at a rated revolution speed. A switching circuit 28 is switched in such a manner as to charge a battery 27 by a generated power. When the opening degree variation amount ΔV becomes larger than the ΔV1, a power assist of operating the power generator G as the electric motor is set to be standby. When the opening degree variation amount ΔV is more than ΔV2 (>ΔV1), the power assist is started. In the power assist, an angle advance amount is increased. When acceleration is insufficient, it is possible to further increase a conduction angle in stages.

Claims6

Dependent claims

An engine operated machine which is provided with an engine for driving a working machine driven approximately at a constant revolution speed, and an electric motor which does double duty as a power generator having an output shaft connected with an output shaft of the engine, comprising:

a battery charged by an operation of the electric motor when the electric motor is operated as a power generator;
and
a means for detecting a variation of a revolution speed of the engine,
wherein the engine operated machine changes a mode between a charging mode where the battery is charged by an operation of the electric motor when the electric motor is operated as a power generator in correspondence to a variation of the revolution speed of the engine, and a driving mode where the power of the engine is increased by an operation of the battery as a power source.

1 more element

Dependencies are inferred from the claim text.