Engine speed control system and method

Details Engine speed control system and method Engine speed control system and method

1994-01-25

1995-05-23

Nelli, Raymond A.

Internal-combustion engines

Engine speed regulator

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

F02D 3100

Patent

active

054171938

ABSTRACT:
An engine speed control apparatus employs a governor responsive to predetermined control input signals for controlling engine speed. An accelerator sensor produces an accelerator control input signal corresponding to the position of an accelerator. A mode selector selects one of a governor mode and a throttle mode, and produces one of a governor mode control input signal and a throttle mode control input signal corresponding to the mode selected. The governor is responsive to the governor mode control input signal for permitting the selection of an upper limit of engine speed within a predetermined range of speeds and thereafter for controlling the engine speed to maintain the engine at this upper limit when the accelerator control signal corresponds to a maximum accelerator position. The governor is responsive to the throttle mode control input signal for permitting the selection of a lower limit of engine speed within a predetermined range and for thereafter controlling the engine speed to maintain the engine at this lower limit of engine speed when the accelerator control signal corresponds to a minimum accelerator position.

REFERENCES:
patent: 4893243 (1990-01-01), Tada et al.
patent: 5270934 (1993-12-01), Kobayashi
patent: 5305216 (1994-04-01), Okura et al.
patent: 5329455 (1994-07-01), Oo et al.
patent: 5337237 (1994-08-01), Katayama et al.
Operator's Manual-Turf-Truckster.RTM. Vehicle, Cushman, Inc. 1989 pp. 6-7 and 45-46.
Basic Governing Information, Barber-Colman Company 6 pages.
DYNA 8000 Governor System, Barber-Colman Company 2 pages.

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