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New Cycles for Automobile Engines
Technical Paper
1999-01-0623
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
A typical pattern of vehicle driving includes a series of frequent accelerations and decelerations. Fuel energy spent to accelerate the vehicle is later wasted during deceleration, when kinetic energy is converted into heat in friction brakes. New thermodynamic cycles have been conceived for automobile engines to capture the energy of braking in the form of compressed air, and reuse this energy during acceleration at a later time. They are applicable to all types of automotive engines. Each four-stroke cycle includes two power strokes, one with compressed air and a second one with combustion gas. It is also possible to switch the engine operation from a four-stroke to a two-stroke cycle during acceleration, which allows a reduction in engine displacement.
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Citation
Schechter, M., "New Cycles for Automobile Engines," SAE Technical Paper 1999-01-0623, 1999, https://doi.org/10.4271/1999-01-0623.Also In
References
- Schechter M. Levin M. “Camless Engine” SAE paper 960582
- Anderson M. Tsao T. Levin M. “Adaptive Lift Control for a Camless Electrohydraulic Valvetrain” SAE paper 981029
- Ashhab M. Stefanopoulou A. Cook J. Levin M. “Camless Engine Control for a Robust Unthrottled Operation” SAE paper 981031