Engine revolution controller of working machine

Details Engine revolution controller of working machine Engine revolution controller of working machine

2008-01-22

2008-01-22

Argenbright, T. M. (Department: 3747)

Internal-combustion engines

Engine speed regulator

Having condition responsive means with engine being part of...

C123S406230

Reexamination Certificate

active

07320306

ABSTRACT:
In an engine of a working machine having no governor mechanism, the engine revolution speed is controlled such that the revolution speed can stably be maintained irrespective of the variation in load without adjusting the throttle opening to exploit the full potential of the engine. Since an engine1does not have the governor mechanism, an operator adjusts the throttle opening and controls the engine revolution speed. A map in which ignition timing (amount of angle of lead) is set by means of functions of the engine revolution speed is stored in an ignition timing map30. The map30is set such that the engine revolution speed is equal to or higher than a value to be controlled (e.g. 7000 rpm), and the ignition timing is lagged as compared with a case in which the engine revolution speed is lower than the value to be controlled.

REFERENCES:
patent: 4075989 (1978-02-01), Nagasawa
patent: 4572150 (1986-02-01), Foster
patent: 2003/0130785 (2003-07-01), Ishikawa et al.
patent: 2005/0016498 (2005-01-01), Hartmann et al.
patent: 54-152813 (1979-10-01), None
patent: 61-272472 (1986-12-01), None
patent: 7-317577 (1995-12-01), None
patent: 8-121307 (1996-05-01), None

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