Title:
METHOD TO MEASURE FRICTION LOSS IN ENGINES AND METHOD TO DETECT ENGINE DRIVING STATE
Document Type and Number:
WIPO Patent Application WO/2014/141627
Kind Code:
A1
Abstract:
The angular deceleration (dω/dt) of an output shaft after switching from a driving state, in which an engine is driven by burning fuel that is supplied, by a fuel supplying device, into a space in an engine cylinder, to a measuring state, in which deceleration is caused by suppressing the combustion of fuel in the engine cylinder space, is measured, and the friction loss in an engine is found based on the measured friction torque (Tf) of the engine found by a formula (Tf=It×dω/dt), where (It) is the moment of inertia for the entire drive system of the engine, and the friction torque correction volume corresponding to the work correction volume resulting from the post-combustion dripping generated in the engine cylinder space after switching from the driving state to the measuring state.
Inventors:
SHIMADA TAIZO (JP)
KOREMATSU KOJI (JP)
TANAKA JUNYA (JP)
NOTOMI MITSUO (JP)
KURODA YOJI (JP)
KOREMATSU KOJI (JP)
TANAKA JUNYA (JP)
NOTOMI MITSUO (JP)
KURODA YOJI (JP)
Application Number:
PCT/JP2014/001201
Publication Date:
September 18, 2014
Filing Date:
March 05, 2014
Export Citation:
Assignee:
SHIMADA TAIZO (JP)
International Classes:
G01M15/00; G01N19/02
Foreign References:
| JPS5757235A | 1982-04-06 | |||
| JPS5165206A | 1976-06-05 | |||
| JPS59206740A | 1984-11-22 | |||
| JP2001098997A | 2001-04-10 | |||
| JP2004150424A | 2004-05-27 | |||
| US6188951B1 | 2001-02-13 |
Other References:
TOSHIAKI KONOMI ET AL.: "Measurement and Analysis of an Instantaneous Friction Torque Utilizing an Accurate Revolutional Speed Detector", TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS. B, vol. 48, no. 434, 1982, pages 2127 - 2133
Attorney, Agent or Firm:
OHNISHI, Shogo et al. (JP)
Shogo Onishi (JP)
Shogo Onishi (JP)
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