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Improving the Power Curve of an ICE Using Electromagnetic Valve Actuation
Technical Paper
2003-01-2276
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
The race to advance the internal combustion to its limit of efficiency is showing no sign of slowing despite the barrage of alternative fuel vehicles being invented, tested, and introduced at a furious pace. At the forefront of this research is the use of infinitely variable timing systems.
To demonstrate the feasibility of using a camless Electromagnetic Valve Actuation (EVA) system for variable valve timing, experiments were conducted at the University of California, Riverside on a single cylinder, 4-stroke, 250 cc engine. This engine was modified to accept four electromagnetic valve actuators in place of the four-valve, camshaft driven system. While results of the experiments showed that the EVA system was capable of fully opening and closing the two exhaust and two intake valve at engine speeds in excess of 7,000rpm, the major benefit observed was the increase in the operational range at full load. The camshaft engine was limited to a full load lower engine speed of 4,150 rpm whereas as the EVA engine was able to operate down to an engine speed of 1,350 rpm at full load.
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Citation
Heffel, J., "Improving the Power Curve of an ICE Using Electromagnetic Valve Actuation," SAE Technical Paper 2003-01-2276, 2003, https://doi.org/10.4271/2003-01-2276.Also In
Advanced Spark-Ignition Engines and Gaseous Alternative Fuels
Number: SP-1792; Published: 2003-06-23
Number: SP-1792; Published: 2003-06-23
References
- Automotive Engineering magazine SAE July 1997
- Schechter M. M. Levin M. B. “Camless Engine” SAE paper 960581
- Dresner T. Barkan P. “A review of Variable Valve Timing Benefits and Modes of Operation” SAE paper 891676
- Dresner T. Barkan P. “A review of Variable Valve Timing Benefits and Modes of Operation” SAE paper 891676
- Gould L. Richeson W. Erickson F. “Performance Evaluation of a Camless Timing Strategy for Improved Fuel Economy and Emissions” SAE paper 950975
- Stein R. Galietti K. Leone T. “Dual Equal VCT - A Variable Camshaft Timing Strategy for Improved Fuel Economy and Emissions” SAE paper 950975
- Dresner T. Barkan P. “A review of Variable Valve Timing Benefits and Modes of Operation” SAE paper 891676
- Schechter M. M. Levin M. B. “Camless Engine” SAE paper 960581