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An Initial Study of Variable Valve Timing Implemented with a Secondary Valve in the Intake Runner
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Abstract
This paper describes an investigation of implementing variable valve timing with the use of a secondary valve in the intake tract The secondary valve acts in series with the conventional poppet valve of the engine, which is actuated in the conventional manner and with fixed timing It is significantly easier to adjust the timing of the secondary valve than that of the main valve There are two possible modes of operation of this device One is to control valve overlap, improving low speed low load performance The other is to use it as a load control mechanism, replacing the conventional throttle and therefore reducing the ‘pumping losses’ associated with conventional throttling We have implemented such a system on a motored single-cylinder research engine using pneumatic actuation Our experiments have demonstrated successful load control, significant pumping loss reduction, and control of backflow from the exhaust to the intake manifold
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Authors
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Citation
Vogel, O., Roussopoulos, K., Guzzella, L., and Czekaj, J., "An Initial Study of Variable Valve Timing Implemented with a Secondary Valve in the Intake Runner," SAE Technical Paper 960590, 1996, https://doi.org/10.4271/960590.Also In
References
- A review of variable engine valve timing Gray C SAE paper 880386 1988
- Variable valve actuation methods and the potential for their application Stone R Kwan E SAE paper 890673 1989
- Controlling engine load by means of early intake valve closure Tuttle J H SAE paper 820408 1982
- Effects of intake-valve closure timing on spark-ignition engine combustion Hara S Nakajima Y Nagumo S SAE paper 850074 1985
- Variable valve timing - a possibility to control engine load without throttle Lenz H P Wichart K SAE paper 880388 1988
- Variable valve actuation systems for the optimisation of engine torque Demmelbauer-Ebner W Dachs A Lenz H P SAE paper 910447 1991
- Performance evaluation of a camless engine using valve actuators with programmable timing Gould L A Richeson W E Erickson F L SAE paper 910450 1991
- Variable gas exchange systems for SI engines - layout and experimental data Mikulic L Schommers J Geringer B Wolf K Enderle Ch SAE paper 920296 1992
- Strategies to improve SI-engine performance by means of variable valve intake lift, timing and duration Kreuter P Heuser P Schebitz M SAE paper 920449 1992
- A non-throttled gasoline engine using a variable shutter valve Low S C SAE paper 911229 1991
- The development of new throttle valve actuation system for natural gas engine Azechi M Kanesaka H Nishida A, Terauchi Y Yoshimitsu T SAE Paper 920454 1992
- A high expansion ratio gasoline engine with intake control rotary valve installation Ichimaru K Sakai H Kanesaka H Winterbone D E JSAE Review 14 4 12 15 October 1993
- Cut-off control a promising method of load regulation in spark ignition engine Abdalla M M Y SAE Paper 940202 1994
- Suppression of pumping loss at partial load by throttling with a rotating distributor Martin and Tazerout International Conference on New Developments in Powertrain and Chassis Engineering Strasbourg June 1987
- Walzer P Adamis P Heinrich H Schumacher V 47 1 15 20 1986
- A convenient technique for determining comparative volumetric efficiency Roussopoulos K SAE paper 900352 1990