This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Improvements of Crankcase Delivery Ratio in Two-Stroke Engines with Volume Intake System
Technical Paper
1999-01-3334
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
The article presents the possibilities of improvements the crankcase delivery ratio in small two-stroke engines by modification of the inlet system by means of an additional side volume connected with the inlet pipe. The results of calculations from numerical simulation of gas physical parameters, taking into account thermodynamic phenomena in the inlet system and crankcase, are closed to those obtained during experiments. Influence of different geometrical parameters of the inlet system on the crankcase delivery ratio is considered. The application of such system increases engine delivery ratio and improves air-fuel ratio over the whole range of engine speed, especially with part-throttle openings and higher engine rotational speed. Simulation and experimental variations of pressure and delivery ratio for various systems have been presented. Good correlation between theory and experiment makes possible a selection of this system at the early stage of design. A simple system can be applied particularly in small motorcycles, boat engines and agriculture engines. The enclosed figures show a schematic diagram of the system taken under consideration and comparison of engine delivery ratio with classic intake system and volume intake system.
Recommended Content
Citation
Mitianiec, W., "Improvements of Crankcase Delivery Ratio in Two-Stroke Engines with Volume Intake System," SAE Technical Paper 1999-01-3334, 1999, https://doi.org/10.4271/1999-01-3334.Also In
References
- MITIANIEC W. Two-Stroke Engines of Small Power. Reed Valves and Volume (in polish) Ossolineum 1994
- MITIANIEC W. JAROSZEWSKI A. Mathematical models of Physics Processes in Internal Combustion Engines of Small Power (in polish) Ossolineum 1993
- HATA N. FUJITA T. MATSUO N. Modification of Two Stroke Engine Intake System for Improvements of Fuel Consumption and Performance through the Yamaha Energy Induction System(YEIS) SAE Pap. No 810923
- LESINSKÝ J. Der Einfluss des Gaswechsels den Arbeitsprozess - Theorie - Experiment - Analyse FISITA 1986
- BLAIR G.P. CAHOON W.L. A More Complete Analysis of Unsteady Gas Flow Through a High-Specific-Output Two Cycle Engine SAE Prep, No 720156
- SANDBORN D.S. Paper Powerplants Performance Progress SAE Pap. No 750016
- BLAIR G.P. The Basic Design of Two-Stroke Engines SAE R-104 February 1990
- BLAIR G.P. Non-Isentropic Analysis of Varying Area Flow in Engine Ducting SAE Pap. 932399 SAE Congress Milwaukee September 1993
- ANNAND W.J. Heat Transfer in the Cylinder of Reciprocating Internal Combustion Engines Proc.I.Mech.E. 177 1963
- CHEN CH. VESHAGH A. A Comparison Between Alternative Methods for Gas Flow and Performance Prediction of Internal Combustion Engines SAE Tech.Pap., 921734
- BINGHAM J.F. BLAIR G.P. An Improved Branched Pipe Model for Multi-Cylinder Proc.I.Mech.E. 199 D1 1985 65 77
- LUDWIG J. QIN H.Q. SPALDING D.B. PHOENICS Reference Manual TR200 CHAM London 1991