Flattening the torque curve of a two-stroke engine with a fluid diode installed at the scavenge port

Eran Sher; Haim Yafe

doi:10.4271/830092

Flattening the torque curve of a two-stroke engine with a fluid diode installed at the scavenge port

Eran Sher, Haim Yafe

Department of Mechanical Engineering

Research output: Contribution to journal › Conference article › peer-review

2 Scopus citations

Abstract

The typical convex torque of a simple two-stroke engine having a port-controlled piston is attributed to the backflow through the scavenge ports. It is proposed here to suppress the backflow by installing scroll diodes at the scavenge ports. Experimental observations on a fired engine demonstrate the remarkable improvement achieved with the diodes installed. The effect of the diodes presence on the engine power and on the delivery ratio is discussed by using a recorded diagram of the crankcase pressure variation with crank-angle during the gas exchange process.

Original language	English
Journal	SAE Technical Papers
DOIs	https://doi.org/10.4271/830092
State	Published - 1 Jan 1983
Event	International Congress and Exposition - Detroit, MI, United States Duration: 28 Feb 1983 → 4 Mar 1983

ASJC Scopus subject areas

Automotive Engineering
Safety, Risk, Reliability and Quality
Pollution
Industrial and Manufacturing Engineering

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.4271/830092

Cite this

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abstract = "The typical convex torque of a simple two-stroke engine having a port-controlled piston is attributed to the backflow through the scavenge ports. It is proposed here to suppress the backflow by installing scroll diodes at the scavenge ports. Experimental observations on a fired engine demonstrate the remarkable improvement achieved with the diodes installed. The effect of the diodes presence on the engine power and on the delivery ratio is discussed by using a recorded diagram of the crankcase pressure variation with crank-angle during the gas exchange process.",

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N2 - The typical convex torque of a simple two-stroke engine having a port-controlled piston is attributed to the backflow through the scavenge ports. It is proposed here to suppress the backflow by installing scroll diodes at the scavenge ports. Experimental observations on a fired engine demonstrate the remarkable improvement achieved with the diodes installed. The effect of the diodes presence on the engine power and on the delivery ratio is discussed by using a recorded diagram of the crankcase pressure variation with crank-angle during the gas exchange process.

AB - The typical convex torque of a simple two-stroke engine having a port-controlled piston is attributed to the backflow through the scavenge ports. It is proposed here to suppress the backflow by installing scroll diodes at the scavenge ports. Experimental observations on a fired engine demonstrate the remarkable improvement achieved with the diodes installed. The effect of the diodes presence on the engine power and on the delivery ratio is discussed by using a recorded diagram of the crankcase pressure variation with crank-angle during the gas exchange process.

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Flattening the torque curve of a two-stroke engine with a fluid diode installed at the scavenge port

Abstract

ASJC Scopus subject areas

UN SDGs

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