This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Modifications on the Intake Ports with the Aim to Reduce the Noise of a Two-Stroke-Crankcase-Scavenged Engine
Annotation ability available
Sector:
Language:
English
Abstract
One of the dominant noise sources of small two-stroke-cycle and crankcase-scavenged engines (port covered and uncovered by the working piston) represents the intake noise. The opening and closing of the port of these engines which are used to drive chain saws causes intake oscillations of big amplitudes. These are an important part of the total noise with regard to the point of measurement at the ear of the saw operator.
By using a special intake port shape and the advancing of the port opening the gradient of the cross section course is reduced. The reduction of the total noise level is about 2–4 dB (A) as a function of the speed at full load while the delivery rate and the output remain constant.
Recommended Content
Authors
Citation
Groth, K. and Kania, N., "Modifications on the Intake Ports with the Aim to Reduce the Noise of a Two-Stroke-Crankcase-Scavenged Engine," SAE Technical Paper 821069, 1982, https://doi.org/10.4271/821069.Also In
References
- Groth, K. Basics of Piston Engine Design Part III Hydraulic Piston Machines Scriptum Hannover University 1978 103 129 153 158
- Groth, K.
- Graunke, K. Investigations on Oscillations in the Gas in Rotary Piston Compressors and in Their Pressure Line Hannover University 1980
- Heyne, K.G. Experimental Investigation on the Acoustic Similarity of a Production Series of Axial Piston Pumps Hannover University 1978
- Kania, N. Reduction in Total Noise Level of Motor Chain Saws MTZ 42 1981 5 193 200
- Groth, K. Kania, N. Experiments on noise Reduction on a Two-Stroke Crankcase-Scavenged Engine MTZ 42 1981 5 201 203