Analysis of Variable Valve Timing Events and Their Effects on Single Cylinder Diesel Engine

2004 ◽  
Author(s):  
G. B. Parvate-Patil ◽  
H. Hong ◽  
B. Gordon
Keyword(s):  
Diesel Engine ◽  
Variable Valve Timing ◽  
Valve Timing ◽  
Single Cylinder ◽  
Variable Valve ◽  
Timing Events

Design and Performance of a Variable Valve Timing System on a Highly Turbocharged Diesel Engine—Experimental and Predicted Results

1995 ◽  
Vol 209 (4) ◽  
pp. 297-311 ◽  
Author(s):  
C R Stone ◽  
H J Leonard ◽  
C Elliott ◽  
M J Newman ◽  
S J Charlton ◽  
...  
Keyword(s):  
Diesel Engine ◽  
High Speed ◽  
Reverse Flow ◽  
Valve Train ◽  
Variable Valve Timing ◽  
Valve Timing ◽  
Single Cylinder ◽  
Cycle Simulation ◽  
Timing System ◽  
Variable Valve

A previous study using a cycle simulation program had identified the possibility that highly rated diesel engines might benefit from a variable valve timing (VVT) system. In particular, the study had shown that, by delaying the start of inlet valve opening at part load, it should be possible to eliminate the reverse flow that can lead to inlet port fouling. The work reported here encompasses the design and implementation of a variable valve timing system on a highly rated high-speed marine diesel engine. The principal topics addressed are the selection and design of a mechanism, a comparison between the predictions and results from mechanism testing on a single-cylinder valve-train rig and the engine performance predictions and results obtained when the mechanism was tested on the engine. The results from the single-cylinder test rig demonstrated that the mechanism performed satisfactorily, and this led to a design suitable for retro-fitting to the engine. The engine was comprehensively instrumented and the experimental results were in good agreement with the cycle simulation predictions.

Variable Valve Timing With Only One Camshaft Actuator for a Single-Cylinder Engine

2019 ◽  
Vol 24 (4) ◽  
pp. 1839-1850 ◽  
Author(s):  
Andreas Gerlach ◽  
Martin Fritsch ◽  
Sebastian Benecke ◽  
Hermann Rottengruber ◽  
Roberto Leidhold
Keyword(s):  
Variable Valve Timing ◽  
Valve Timing ◽  
Single Cylinder ◽  
Single Cylinder Engine ◽  
Variable Valve

Numerical Calibration of Diesel Engine Variable Valve Timing

2012 ◽  
Vol 516-517 ◽  
pp. 628-633
Author(s):  
Sheng Ou Hu ◽  
Ren Xian Li
Keyword(s):  
Diesel Engine ◽  
Working Conditions ◽  
Combustion Engine ◽  
Engine Performance ◽  
Simulation Method ◽  
Calibration Method ◽  
Operating Conditions ◽  
Variable Valve Timing ◽  
Valve Timing ◽  
Variable Valve

The performance of internal combustion engine can be improved by using variable valve timing technology. but how to get the optimal inlet/export valve open or close angles under various operating conditions still relies mainly on testing calibration method. By means of one-dimensional working process simulation method, the performance of a four cylinder diesel engine was simulated, and the influences of diffrent inlet/export valve timing on engine performances were compared. Optimum valve timing values and engine performances under thirty kinds of working conditions were gotton. After that, the engine performances compared with that without variable valve timing. Simulation results show that the engine performance, especially the emission performance, can be improved at all simulation working conditions. The method used in this paper may be a new way for calibration of optimal valve timing.

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