This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Improvement of Feeling of Motorcycle Acceleration by Altering the Crankpin Phase Angle
Technical Paper
978511
Annotation ability available
Sector:
Language:
English
Abstract
We attempt to improve the feeling of acceleration by considering the change in instantaneous torque when the throttle is opened in motorcycles equipped with parallel two cylinder engines. Feeling of acceleration and vibrations for motorcycles with five types of 400cc engines, including 3 types of engines with different crankpin phase angles varying by 90° each along with two variations in the firing interval were assessed by sensory evaluation and instruments. As the result, it was found that there is a correlation between the feeling of acceleration and the change in instantaneous torque caused by alteration of the crankpin phase angle. It was therefore determined that the feeling of acceleration could be improved by using a crankpin phase angle of 270° relative to crankpin phase angle of 180 or 360° conventionally used in parallel two cylinder engines.
Citation
Tsuchida, N. and Kajiwara, K., "Improvement of Feeling of Motorcycle Acceleration by Altering the Crankpin Phase Angle," SAE Technical Paper 978511, 1997.Also In
References
- Fujii , I. and Yagi , S. et al. MBT Control Utilizing Crank Angle of Maximum Combustion Pressure SAE paper, 890759
- Okamura , M. and Makino , S. 3MA Type Engine for YAMAHA New TZR250 INTERNAL COMBUSTION ENGINE 28 359 1989 33 41
- Honda Publicity Manual: 90's NSR250R Technical Reference
- Takemura , J. , Sato , T. and Ando , H. Analysis of Acceleration Feeling by Sensory Evaluation Procedure Journal of Society of Automotive Engineers of Japan 42 11 1988 1388 1394
- Tanaka , T. and Furusawa , M. Vibration Greatness Level Measurement System for Motorcycles and its Application Preprinted Collection of the Automobile Technology Association, No. 902197 1990