Development of a simplified method for measuring engine motoring friction and its application to valve train friction measurement

• Autorzy: Nakashima K. , Kato T. , Goto K. , Murakami Y.

Identyfikatory

DOI

10.5604/12314005.1213601

• Języki publikacji: EN

Abstrakty

EN

We developed a simpler and less expensive method for measuring friction. Our equipment floats the double-end shaft motor by supporting both sides of the motor shaft with bearings, allowing the stator within the motor case to swing on the rotor with the shaft. Two arms were installed in the motor case; one is attached to a load meter; the other to a balance weight. The motor shaft is connected to the engine shaft, and when the engine is operated by the motor, torque is exerted on the stator with the motor case in the direction opposite to the motor shaft rotation, with engine friction acting as the reaction force. Torque is calculated by multiplying the arm length by the load as measured by the load meter in the arm. As an application of our new motoring friction test method, we measured valve train friction. The cylinder head of a single cylinder gasoline engine was clamped on a test bed, and its camshaft was connected to our friction measuring equipment. Utilizing various follower configurations of the rocker arms, we investigated the friction loss between the rocker arms and the cam. We thus clarified the effect of the valve-opening period and the valve lift on friction loss under various camshaft rotation speeds, and understood the lubricating conditions between the rocker arms and the cam.

Słowa kluczowe

EN

engine friction; motoring friction method; valve train; rocker arm; follower configuration

• Wydawca: Łukasiewicz Research Network - Institute of Aviation ; European Science Society of Powertrain and Transport KONES Poland ; Wydawnictwo Instytutu Technicznego Wojsk Lotniczych
• Czasopismo: Journal of KONES
• Rocznik: 2016
• Tom: Vol. 23, No. 2
• Strony: 261--267
• Opis fizyczny: Bibliogr. 7 poz., rys.

Twórcy

autor

Nakashima K.

• Meijo University, Department of Vehicle and Mechanical Engineering 1-501 Shiogamaguchi, Tempaku-ku, Nagoya 468-8502, Japan tel.: [phone], fax: [phone]

autor

Kato T.

• Meijo University, Department of Vehicle and Mechanical Engineering 1-501 Shiogamaguchi, Tempaku-ku, Nagoya 468-8502, Japan tel.: [phone], fax: [phone]

autor

Goto K.

• Meijo University, Department of Vehicle and Mechanical Engineering 1-501 Shiogamaguchi, Tempaku-ku, Nagoya 468-8502, Japan tel.: [phone], fax: [phone]

autor

Murakami Y.

• Meijo University, Department of Vehicle and Mechanical Engineering 1-501 Shiogamaguchi, Tempaku-ku, Nagoya 468-8502, Japan tel.: [phone], fax: [phone]

Bibliografia

• [1] Bishop, I. N., Effect of Design Variables on Friction and Economy, SAE Transactions, Vol. 73, pp. 334-358, 1965.
• [2] Chiu, Y. P., Lubrication and Slippage in Roller Finger Follower Systems in Engine Valve Trains, Tribology Transactions, Vol. 35, No. 2, pp. 261-268, 1992.
• [3] Goto, K., Noda, S., Nakashima, K., Murakami, Y., Optimizing the Opening Period and the Timing of Intake and Exhaust Valves to Improve Engine Performance in a Supermilage Vehicle, SAE Technical Paper 2015-32-0742, pp. 1-8, 2015.
• [4] Heywood, J. B., Internal Combustion Engine Fundamentals, McGraw-Hill, Inc., pp. 719-738, 2001.
• [5] Matsumoto, K., Friction Reduction in an Internal Combustion Engine, Journal of the Japan Society of Mechanical Engineers, Vol. 79, No. 694, pp. 870-876, 1976.
• [6] Ohmori, T., Hattori, H., Friction Analysis between Cam and Shim in Engine Valve Train System, R&D Review of Toyota CRDL, Vol. 36, No. 1, pp. 39-44, 2001.
• [7] Yasuda, Y., Kano, M., Mabuchi, Y., Abou, S., Research on Diamond-Like Carbon Coatings for Low-Friction Valve Lifters, SAE Technical Paper 2003-01-1101, pp. 77-82, 2003.

Uwagi

PL

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę.