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The Development of a High Fuel Economy and High Performance Four-Valve Lean Burn Engine
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Abstract
The reduction of fuel consumption is of great importance to automobile manufacturers. As a prospective means to achieve fuel economy, lean burn is being investigated at various research organizations and automobile manufacturers and a number of studies on lean-burn technology have been reported to this date.
This paper describes the development of a four-valve lean-burn engine; especially the improvement of the combustion, the development of an engine management system, and the achievement of vehicle test results.
Major themes discussed in this paper are (1) the improvement of brake-specific fuel consumption under partial load conditions and the achievement of high output power by adopting an optimized swirl ratio and a variable-swirl system with a specially designed variable valve timing and lift mechanism, (2) the development of an air-fuel ratio control system, (3) the improvement of fuel economy as a vehicle and (4) an approach to satisfy the NOx emission standard.
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Horie, K., Nishizawa, K., Ogawa, T., Akazaki, S. et al., "The Development of a High Fuel Economy and High Performance Four-Valve Lean Burn Engine," SAE Technical Paper 920455, 1992, https://doi.org/10.4271/920455.Also In
References
- Quader A.A. “The Axially-Stratified-Charge Engine” SAE Paper 820131 1982
- Davis G.C. et al. “Modeling the Effect of Swirl on Turbulence Intensity and Burn Rate in S.I.Engines and Comparison with Experiment” SAE Paper 860325 1986
- Matsushita S. et al. “Effects of Port with Swirl Control Valve on the Combustion and Performance of S.I.Engines” SAE Paper 850046 1985
- Matsushita S. et al. “Development of Toyota Lean Combustion System” SAE Paper 850044 1985
- Khalighi B. “Intake-Generated Swirl and Tumble Motions in a 4-Valve Engine with Various Intake Configurations-Flow Visualization and Particle Tracking Velocimetry” SAE Paper 900059 1990
- Furuno S. et al. “The Effects of Inclination Angle of Swirl Axis on Turbulence Characteristics in a 4-Valve Lean-Burn Engine with SCV” COMODIA 90:437-442
- Mikulic L. et al. “Development of Low Emission High Performance Four Valve Engines” SAE Paper 900227 1990
- Inoue K. et al. “A High Power, Wide Torque Range, Efficient Engine with a Newly Developed Variable-Valve-Lift and -Timing Mechanism” SAE Paper 890675 1989