Stress and Fatigue Analysis of a Single Cylinder Engine Crankshaft

The inertia due to reciprocating parts and connecting rods, as felt by the crankshaft, varies with the crank angle. The effect of inertia variation on torsional free vibration of crankshafts has been studied extensively. In this paper, the effect on combined torsional and bending free vibrations is examined. Single-cylinder engine crankshaft geometry is considered for the study. The results indicate that the inertial coupling, introduced by the reciprocating parts and connecting rod, significantly influences the free vibration characteristics, particularly when the natural frequencies of the crankskahft are closely spaced. The results suggest that, under such conditions, modeling the crankshaft as a pure torsional system would involve considerable error.

Download Full-text

Numerical analysis of single cylinder engine crankshaft

10.1063/5.0025394 ◽

2020 ◽

Author(s):

S. Ajith Arul Daniel ◽

P. Shenbaga Velu ◽

R. Kumar ◽

S. Vijay Ananth

Keyword(s):

Numerical Analysis ◽

Single Cylinder ◽

Single Cylinder Engine ◽

Engine Crankshaft

Download Full-text

Shape Optimization of a Single Cylinder Engine Crankshaft

10.4271/2011-01-1077 ◽

2011 ◽

Cited By ~ 3

Author(s):

M. Cagri Cevik ◽

Emre Kanpolat ◽

Martin Rebbert

Keyword(s):

Shape Optimization ◽

Single Cylinder ◽

Single Cylinder Engine ◽

Engine Crankshaft

Download Full-text

SINGLE CYLINDER ENGINE STUDIES WITH IMPINGING DIRECT INJECTION FUEL INJECTOR

10.37099/mtu.dc.etdr/558 ◽

2017 ◽

Author(s):

Ankur Gupta

Keyword(s):

Direct Injection ◽

Fuel Injector ◽

Single Cylinder ◽

Single Cylinder Engine

Download Full-text

A Transient Single Cylinder Test System for Engine Research and Control Development

Dynamic Systems and Control, Parts A and B ◽

10.1115/imece2005-81323 ◽

2005 ◽

Cited By ~ 3

Author(s):

John L. Lahti ◽

Matthew W. Snyder ◽

John J. Moskwa

Keyword(s):

Test System ◽

Intake Manifold ◽

Test Accuracy ◽

Test Configuration ◽

Single Cylinder ◽

Cylinder Test ◽

Single Cylinder Engine ◽

Wide Range ◽

Reduce Development Time ◽

High Bandwidth

A transient test system was developed for a single cylinder research engine that greatly improves test accuracy by allowing the single cylinder to operate as though it were part of a multi-cylinder engine. The system contains two unique test components: a high bandwidth transient hydrostatic dynamometer, and an intake airflow simulator. The high bandwidth dynamometer is used to produce a speed trajectory for the single cylinder engine that is equivalent to that produced by a multi-cylinder engine. The dynamometer has high torque capacity and low inertia allowing it to simulate the speed ripple of a multi-cylinder engine while the single cylinder engine is firing. Hardware in loop models of the drivetrain and other components can be used to test the engine as though it were part of a complete vehicle, allowing standardized emissions tests to be run. The intake airflow simulator is a specialized intake manifold that uses solenoid air valves and a vacuum pump to draw air from the manifold plenum in a manner that simulates flow to other engine cylinders, which are not present in the single cylinder test configuration. By regulating this flow from the intake manifold, the pressure in the manifold and the flow through the induction system are nearly identical to that of the multi-cylinder application. The intake airflow simulator allows the intake runner wave dynamics to be more representative of the intended multi-cylinder application because the appropriate pressure trajectory is maintained in the intake manifold plenum throughout the engine cycle. The system is ideally suited for engine control development because an actual engine cylinder is used along with a test system capable of generating a wide range of transient test conditions. The ability to perform transient tests with a single cylinder engine may open up new areas of research exploring combustion and flow under transient conditions. The system can also be used for testing the engine under conditions such as cylinder deactivation, fuel cut-off, and engine restart. The improved rotational dynamics and improved intake manifold dynamics of the test system allow the single cylinder engine to be used for control development and emissions testing early in the engine development process. This can reduce development time and cost because it allows hardware problems to be identified before building more expensive multi-cylinder engines.

Download Full-text