Engine speed controlling system in construction machine

Details Engine speed controlling system in construction machine Engine speed controlling system in construction machine

1989-07-19

1991-02-05

Miller, Carl Stuart

Internal-combustion engines

Engine speed regulator

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

123357, 414699, F02M 3900

Patent

active

049895672

ABSTRACT:
In a construction machine having an engine speed setting device, a throttle lever for instructing a set number of revolutions to the engine speed setting device, and plural operating levers each for instructing the operation of an actuator, an engine speed controlling system including a lever neutral detector for detecting a neutral condition of the operating levers and outputting a lever neutral signal. A positive action switch outputs a deceleration command signal when operated by an operator. A control device outputs to the engine speed setting device either a normal operation command at the set number of revolution provided by the throttle lever or a deceleration command at a small number of revolutions in accordance with the signals provided from the lever neutral detector and the switch. The control device is constructed so as to output the deceleration command to the engine speed setting device only when it has received the deceleration command signal from the deceleration command issuing means during issuance of the lever neutral signal from the lever neutral detector and output the normal operation command to the engine speed setting device when the lever neutral signal form the lever neutral detector has been extinguished.

REFERENCES:
patent: 2986291 (1961-05-01), Schick
patent: 3939738 (1976-02-01), Apey
patent: 4373850 (1983-02-01), Dorham
patent: 4606313 (1986-08-01), Izumi
patent: 4638779 (1987-01-01), Kitada
patent: 4643146 (1987-02-01), Sprifssler
patent: 4774921 (1988-10-01), Sakaguchi
patent: 4838755 (1989-06-01), Johnson

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