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Development of Intake Air Pressure Sensorless Fuel Injection System for Small Motorcycles
Published November 08, 2011 by Society of Automotive Engineers of Japan in Japan
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A new control system using O₂ feedback control has been developed as an alternative to intake air pressure sensors. This control method uses the operational condition compensation coefficient Kbu. This coefficient encompasses the state of the engine and environmental conditions such as atmospheric pressure, and corrects fuel injection in response to changes in these factors. Kbu makes it possible to control the amount of fuel injection without depending on an intake air pressure sensor. It also makes it possible to carry out the appropriate air-fuel ratio correction even at times when O₂ feedback control is not operating, such as the cold period, when the engine is first started, or during transient operation, by using Kbu values recorded in the Engine Control Unit (henceforth ECU). This technology has made it possible to build a simplified electronically controlled fuel injection system for small motorcycles, while maintaining the same performance for exhaust emissions and fuel efficiency without an intake air pressure sensor.
CitationTakano, Y., Utsugi, K., Sakaguchi, K., and Onishi, K., "Development of Intake Air Pressure Sensorless Fuel Injection System for Small Motorcycles," SAE Technical Paper 2011-32-0564, 2011, https://doi.org/10.4271/2011-32-0564.
- Ikeda, K. Akamatsu, S. Tanaka, H. Murakami, Y. Oki, K. Kurosaka, H. Development of 50 cm 3 Four-stroke Four-valve Electronically Controlled Fuel-injection Engine for Two-wheeled Vehicle 2004 JSAE Annual Congress Proceedings, No. 9-04 15 18 2004
- Utsugi, K. Akamatsu, S. Technology for Secondary Emission Regulation in Japan of 50 cm 3 Two-wheeled Vehicle 2007 JSAE Annual Congress Proceedings, No. 29-07 1 4 2007
- Shimada, N. Akamatsu, S. Ueda, M. Hayashi, A. Hirakata, Y. Development of an ECU Integrated Throttle Body System Module for a Compact Fuel Injection System Used in Small Motorcycles and Scooters Honda R&D Technical Review 15 1 83 88 2003
- Akamatsu, S. Ishida, S. Hamauzu, A. A Research of Fuel Injection system for Low Emission Motorcycle 2000 JSAE Annual Congress Proceedings, No. 103-00 17 20 2000
- Ueno, M. Ueda, M. Udono, T. Akamatsu, S. Torikai, M. Fukuda, M. Development of Small Fuel Pump Module for Motorcycles Honda R&D Technical Review 20 1 89 94 2008
- Horiike, S. Yamada, H. Ooyama, T. Kano, K. Abe, M. Iwata, Y. Exhaust Emission Reduction System for “VFR800FI” Honda R&D Technical Review 10 42 48 1998