Speed control system for lawnmower engine

Details Speed control system for lawnmower engine Speed control system for lawnmower engine

2008-05-13

2008-05-13

Will, Thomas B. (Department: 3671)

Harvesters

Motorized harvester

With condition-responsive operation

C056S01020R, C056S010800

Reexamination Certificate

active

07370458

ABSTRACT:
In a lawnmower engine speed control system having an actuator moving a throttle valve and a controller controlling operation of the actuator such that the engine speed becomes equal to a predefined desired engine speed, it is determined whether the lawnmower is under a mowing operation based on a value indicative of a load of the engine including an operation rate or output of the engine, the desired engine speed is changed based on a result of determination, thereby enabling to lower noise, to boost fuel efficiency, and to simplify operation by making manual regulation of engine speed unnecessary, while ensuring stable operation free from engine speed variance.

REFERENCES:
patent: 2639569 (1953-05-01), Pasturczak
patent: 3044238 (1962-07-01), Harkness
patent: 4487002 (1984-12-01), Kruse et al.
patent: 5010866 (1991-04-01), Ohata
patent: 5488817 (1996-02-01), Paquet et al.
patent: 5651341 (1997-07-01), Harada et al.
patent: 6892517 (2005-05-01), Adams et al.
patent: 2003-111508 (2003-04-01), None

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