Engine control system for construction machine

Details Engine control system for construction machine Engine control system for construction machine

2007-08-14

2007-08-14

Argenbright, T. M. (Department: 3747)

Internal-combustion engines

Engine speed regulator

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

C123S339160

Reexamination Certificate

active

10527418

ABSTRACT:
An engine control system includes pressure sensors (73, 74), position sensors (75, 76), pressure sensors (77, 78), a target revolution speed modification value computing unit (90), and a modification value adder (70r). A target revolution speed NR2for use in control is computed based on changes of status variables such that the target revolution speed NR2increases from the target revolution speed NR1applied from an input unit (71), and then moderately returns to the target revolution speed NR1. In accordance with the computed target revolution speed NR2for use in control, a target fuel injection amount FN1is computed and a fuel injection amount is controlled. As a result, a drop of an engine revolution speed attributable to an abrupt increase of an engine load can be suppressed without sacrificing the work efficiency, and lowering of durability caused by an excessive increase of the engine revolution speed can be prevented.

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patent: 2001-173605 (2001-06-01), None
patent: 3414159 (2003-04-01), None

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