ENGINE SPEED CONTROLLER FOR WORKING MACHINE

Title:

ENGINE SPEED CONTROLLER FOR WORKING MACHINE

Document Type and Number:

WIPO Patent Application WO/2005/054666

Kind Code:

A1

Abstract:

An engine speed controller for a working machine having no governor mechanism in which the speed can be maintained stably regardless of a variation in load without regulating the throttle opening and the speed can be controlled to bring out the engine capacity to the maximum. Since the engine (1) has no governor mechanism, the worker controls the engine speed by regulating the throttle opening. An ignition timing map (30) has a map where the ignition timing (lead angle) is set as a function of the engine speed. A CPU (27) searches the ignition timing map (30) according to the engine speed detected by a speed sensor (29) and determines an ignition timing. The map (30) is set to delay the ignition timing behind the previous timing when the engine speed is over a limit engine speed. When the engine speed is, e.g., 7000 rpm or more, delay angle control is performed. When the engine speed is below 7000 rpm, ignition timing is controlled in correspondence with the engine speed.

Inventors:

TAMAMOTO RIYUUHEI (JP)
YONEYAMA MASAYUKI (JP)
YAMAMURA MAKOTO (JP)
KANAI MITSUYOSHI (JP)

Application Number:

PCT/JP2004/017235

Publication Date:

June 16, 2005

Filing Date:

November 19, 2004

Export Citation:

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Assignee:

HONDA MOTOR CO LTD (JP)
TAMAMOTO RIYUUHEI (JP)
YONEYAMA MASAYUKI (JP)
YAMAMURA MAKOTO (JP)
KANAI MITSUYOSHI (JP)

International Classes:

F02D11/02; F02P5/06; F02P5/15; (IPC1-7): F02P5/15; F02D9/02; F02D43/00

Foreign References:

JPH07317577A	1995-12-05
JPH08121307A	1996-05-14
JPS61272472A	1986-12-02

Other References: