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A New Engine Control System Using Direct Fuel Injection and Variable Valve Timing
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English
Abstract
A new engine drivetrain control system is described which can provide a higher gear ratio and leaner burning mixture and thus reduce the fuel consumption of spark ignition engines. Simulations were performed to obtain reduced torque fluctuation during changes in the air - fuel ratio and gear ratio, without increasing nitrogen oxide emissions, and with minimum throttle valve control.
The results show that the new system does not require the frequent actuation of throttle valves because it uses direct fuel injection, which increases the air - fuel ratio of the lean burning limit. It also achieves a faster response in controlling the air mass in the cylinders. This results in the minimum excursion in the air - fuel ratio which in turn, reduces nitrogen oxide emissions.
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Citation
Ohyama, Y. and Fujieda, M., "A New Engine Control System Using Direct Fuel Injection and Variable Valve Timing," SAE Technical Paper 950973, 1995, https://doi.org/10.4271/950973.Also In
References
- Ohyama Y. The roles of air flow meter in engine drivetrain control system 4th International Conference on Vehicle and Traffic Systems Technology European Automobile Engineers Cooperation Strasbourg June 16 - 18 1993
- Ohyama Y. Ohsuga M. Fujieda M. Air flow metering and combustion control for spark ignition engines International Congress and Exposition, SAE Detroit March 1 - 5 1993
- Ohyama Y. Fujieda M. Nogi T. A new spark ignited direct fuel injection system provides greater ignition capability 15. Internationles Wiener Motorensymposium April 28 - 29 1994
- Ohyama Y. Air - fuel ratio characteristics of engine drivetrain control system using electronically controlled throttle valve and air flow meter International Symposium on Advanced Vehicle Control 1994 Society of Automotive Engineers of Japan, Inc. Tsukuba October 24 - 28 1994
- Theobald M. A. Lequesne B. Henry R. Control of engine load via electromagnetic valve actuators International Congress and Exposition, SAE Detroit February 28 March 3 1994
- Fraidl G.K. Hazeu H.P. Carstensen H. DMI - ein Schichtladekonzept für zukunftige Verbrenungsmotoren, 14 Internationales Wiener Motorensymposium Fortschr May 6 - 7 1993
- Fujieda M. Ohyama Y. Ohsuga M. Nogi T. Analysis of gas flow in the intake manifold of gasoline engines JSAE Review 12 1 January 1991 6 11