This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Acceleration Test Method for a High Performance Two-Stroke Racing Engine
Annotation ability available
Sector:
Language:
English
Abstract
This paper describes an inertial dynamometer system which has been applied to the testing of small two-stroke kart racing engines. The dynamometer incorporates a flywheel of appropriate moment of inertia to simulate the mass of a kart and driver. The test procedure involves measurement of the flywheel speed during an acceleration phase resulting from opening the throttle. Calculation of the instantaneous flywheel acceleration corresponding to each engine speed directly gives a measure of the torque and power characteristics. Performance results, including exhaust pressure traces, are presented from a series of tests conducted on a 100 cm3 kart engine. The results are compared with corresponding steady state measurements recorded on an eddy current dynamometer. In addition, the measured results are compared with predictions from a computer simulation.
Recommended Content
Authors
Topic
Citation
Kee, R. and Blair, G., "Acceleration Test Method for a High Performance Two-Stroke Racing Engine," SAE Technical Paper 942478, 1994, https://doi.org/10.4271/942478.Also In
References
- Bendix Karl-Heinz ‘Optimizing of the nonsteady operational behaviour of high performance two-stroke engines’ SAE Paper No. 931509 SETC Conference Pisa 1993
- Bendix Kart-Heinz April 1993
- Holzleitner H. ‘Snowmobile 340ccm Formula 1 - and Kart 100ccm Racing Engines: Two Extremes in Terms of High-Performance Two-Stroke Engine Layouts’ SAE Paper No. 911312 1991
- Blair G.P. The Basic Design of Two-Stroke Engines SAE Publication No. R-104 1-56091-008-9 1990
- Benson R.S. The Thermodynamics and Gas Dynamics of Internal Combustion Engines 1 2 Clarendon Press Oxford 1982
- Blair G.P. ‘An Alternative Method for the Prediction of Unsteady Gas Flow Through the Internal Combustion Engine’ SAE International Off-Highway & Powerplant Congress Milwaukee, Wisconsin September 1991 SAE Paper No. 911850
- Kirkpatrick S.J. Blair G.P. Fleck R. McMullan R.K. ‘Experimental Evaluation of 1-D Computer Codes for the Simulation of Unsteady Gas Flow Through Engines - A First Phase’ SAE International Off-Highway & Powerplant Congress Milwaukee, Wisconsin September 1994 SAE Paper No. 941685
- Sweeney M.E.G. Kenny R.G. Swann G.B. Blair G.P. ‘Single Cycle Gas Testing Method for Two-Stroke Engine Scavenging’ SAE International Congress Detroit, Michigan February 1985 SAE Paper No. 850178
- Reid M.G. Douglas R. ‘Quasi-Dimensional Modelling of Combustion in a Two-Stroke Cycle Spark Ignition Engine’ SAE International Off-Highway & Powerplant Congress Milwaukee, Wisconsin September 1994 SAE Paper No. 941680
- Fleck R. Blair G.P. Houston R.A.R. ‘An Improved Model for Predicting Reed Valve Behaviour in Two-Stroke Engines’ SAE International Off-Highway & Powerplant Congress Milwaukee, Wisconsin September 1987 SAE Paper No. 871654