DEVICE FOR CONTROLLING ENGINE FOR INDUSTRIAL MACHINERY AND METHOD FOR CONTROLLING ROTATIONAL FREQUENCY OF ENGINE FOR INDUSTRIAL MACHINERY

WIPO Patent Application WO/2012/029426

A1

[Problem] To provide a method for controlling the rotational frequency of an engine for industrial machinery and a device for controlling an engine for industrial machinery that, without using an added switch, sensor, or the like and without necessitating an operation by an operator, are capable of distinguishing a state wherein work is not actually being performed and executing an automatic deceleration function. [Solution] The device for controlling an engine for industrial machinery, said device controlling the engine that drives a hydraulic pump for supplying hydraulic pressure to a hydraulic device that operates by means of hydraulic pressure, is provided with: a rotational frequency control means that controls the engine in a manner so that the engine rotational frequency becomes a target rotational frequency on the basis of the designation of the target rotational frequency; a load detection means that detects a control parameter that correlates with a load on the engine; and a rotational frequency reducing means that distinguishes whether or not the value of the control parameter has become less than a predetermined reduction threshold value, and when the value of the control parameter has become less than the reduction threshold value, reduces the engine rotational frequency regardless of the designation of the target rotational frequency.

FUKUSHIMA NAOYUKI (JP)

PCT/JP2011/066459

March 08, 2012

July 20, 2011

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BOSCH CORP (JP)
FUKUSHIMA NAOYUKI (JP)

F02D29/04; F02D9/04; F02D17/04; F02D29/00; F02D45/00

WO2009157511A1

2009-12-30

JP2010024622A	2010-02-04
JP2005210870A	2005-08-04
JP2010048154A	2010-03-04
JP2011032911A	2011-02-17

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