JPS5762943A - Engine speed control device - Google Patents

Engine speed control device

Info

Publication number
JPS5762943A
JPS5762943A JP13944580A JP13944580A JPS5762943A JP S5762943 A JPS5762943 A JP S5762943A JP 13944580 A JP13944580 A JP 13944580A JP 13944580 A JP13944580 A JP 13944580A JP S5762943 A JPS5762943 A JP S5762943A
Authority
JP
Japan
Prior art keywords
pressure
valve
engine
fluid
increased
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP13944580A
Other languages
Japanese (ja)
Inventor
Yuji Katayama
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nabco Ltd
Original Assignee
Nabco Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nabco Ltd filed Critical Nabco Ltd
Priority to JP13944580A priority Critical patent/JPS5762943A/en
Publication of JPS5762943A publication Critical patent/JPS5762943A/en
Pending legal-status Critical Current

Links

Landscapes

  • Control Of Vehicle Engines Or Engines For Specific Uses (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)

Abstract

PURPOSE: To achieve efficient operation of an engine used for driving a pressure fluid source for a construction machine or the like, by employing an engine speed control device in which the engine speed is controlled according to the amount of pressure fluid supplied into aan actuator of a cylinder or the like.
CONSTITUTION: When an electric instruction to an electromagnetic control section 13 of an electromagnetic flow control valve 8 is increased after shifting, for instance, a changeover valve 5 to a left position 5a under the state that an engine 1 is in its idling operation with changeover valves 5, 6 being kept at their neutral position, a second control valve 8a is opened according to the value of said electric instructon, so that the pressure difference on the opposite sides of a differential pressure valve 9 is increased. Resultantly, such an amount of fluid as corresponds to the above instruction value is discharged from a pump 2 into a pressure chamber 4a of cylinder 4 via a fluid supply circuit 12 and the changeover valve 5. At the same time, fluid pressure on the opposite sides of the differential pressure valve 9 are supplied respectively to pressure chamber 11a, 11b of the control cylinder 11, and a rod 15a is moved in the direction A in response to the pressure difference of the two chambers 11a and 11b, so that the speed of engine 1 is increased.
COPYRIGHT: (C)1982,JPO&Japio
JP13944580A 1980-10-02 1980-10-02 Engine speed control device Pending JPS5762943A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13944580A JPS5762943A (en) 1980-10-02 1980-10-02 Engine speed control device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13944580A JPS5762943A (en) 1980-10-02 1980-10-02 Engine speed control device

Publications (1)

Publication Number Publication Date
JPS5762943A true JPS5762943A (en) 1982-04-16

Family

ID=15245363

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13944580A Pending JPS5762943A (en) 1980-10-02 1980-10-02 Engine speed control device

Country Status (1)

Country Link
JP (1) JPS5762943A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51132322A (en) * 1975-05-13 1976-11-17 Nissan Motor Co Ltd Internal combustion engine control device for industrial vehicle

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51132322A (en) * 1975-05-13 1976-11-17 Nissan Motor Co Ltd Internal combustion engine control device for industrial vehicle

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