JPS57188729A - Compression pressure detecting method for internal combustion engine - Google Patents

Compression pressure detecting method for internal combustion engine

Info

Publication number
JPS57188729A
JPS57188729A JP6181981A JP6181981A JPS57188729A JP S57188729 A JPS57188729 A JP S57188729A JP 6181981 A JP6181981 A JP 6181981A JP 6181981 A JP6181981 A JP 6181981A JP S57188729 A JPS57188729 A JP S57188729A
Authority
JP
Japan
Prior art keywords
load current
engine
internal combustion
combustion engine
variation
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
JP6181981A
Other languages
Japanese (ja)
Inventor
Susumu Nagai
Ichisuke Mizushima
Tadashi Kawasaki
Teruo Nakano
Kozo Oba
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.)
Hitachi Zosen Corp
Original Assignee
Hitachi Zosen Corp
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 Hitachi Zosen Corp filed Critical Hitachi Zosen Corp
Priority to JP6181981A priority Critical patent/JPS57188729A/en
Publication of JPS57188729A publication Critical patent/JPS57188729A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L23/00—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid
    • G01L23/08—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid operated electrically
    • G01L23/085—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid operated electrically by measuring fluctuations of starter motor current or of battery voltage

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Fluid Pressure (AREA)

Abstract

PURPOSE:To diagnose the abnormality of an engine by detecting the variation of the compressing pressure of an internal combustion engine from the variation of the load current when cranking the starter motor for the engine thereby detecting the compressing pressure without fixing a pressure sensor. CONSTITUTION:The load current variation when cranking a starter motor for an internal combustion engine is measured. The compressing pressure is detected from the ratio P/Po where Po is the peak load current during one cycle of the engine 1 or the peak amplitude of the load current under the normal state of engine while P is the peak amplitude of the load current under the abnormal state. In such a manner the abnormality of the compressing pressure can be detected easily thereby the breaking of a piston ring, incorrect head gap of the supply/exhaust valve and the break-down of the piston and the cylinder head can be detected.
JP6181981A 1981-04-22 1981-04-22 Compression pressure detecting method for internal combustion engine Pending JPS57188729A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6181981A JPS57188729A (en) 1981-04-22 1981-04-22 Compression pressure detecting method for internal combustion engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6181981A JPS57188729A (en) 1981-04-22 1981-04-22 Compression pressure detecting method for internal combustion engine

Publications (1)

Publication Number Publication Date
JPS57188729A true JPS57188729A (en) 1982-11-19

Family

ID=13182068

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6181981A Pending JPS57188729A (en) 1981-04-22 1981-04-22 Compression pressure detecting method for internal combustion engine

Country Status (1)

Country Link
JP (1) JPS57188729A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0652425A2 (en) * 1993-11-05 1995-05-10 Bayerische Motoren Werke Aktiengesellschaft Device for evaluating the compression of a multi-cylinder combustion engine

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3839906A (en) * 1973-10-09 1974-10-08 Rca Corp Apparatus for engine compression testing
US3952586A (en) * 1975-06-19 1976-04-27 Rca Corporation Determining engine compression from starter motor current
JPS5522611A (en) * 1978-08-03 1980-02-18 Asahi Chem Ind Co Ltd Preparation of carboxylic acid amide

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3839906A (en) * 1973-10-09 1974-10-08 Rca Corp Apparatus for engine compression testing
US3952586A (en) * 1975-06-19 1976-04-27 Rca Corporation Determining engine compression from starter motor current
JPS5522611A (en) * 1978-08-03 1980-02-18 Asahi Chem Ind Co Ltd Preparation of carboxylic acid amide

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0652425A2 (en) * 1993-11-05 1995-05-10 Bayerische Motoren Werke Aktiengesellschaft Device for evaluating the compression of a multi-cylinder combustion engine
DE4337720A1 (en) * 1993-11-05 1995-05-18 Bayerische Motoren Werke Ag Device for evaluating the compression of a multi-cylinder internal combustion engine
EP0652425A3 (en) * 1993-11-05 1996-01-10 Bayerische Motoren Werke Ag Device for evaluating the compression of a multi-cylinder combustion engine.

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