Optimal Design Of R16V280ZJ Diesel Engine Valve Cam Profile

The valve train system is one of the most important mechanisms in a diesel engine. For a diesel engine, superior fuel economy, working liability, and controlled noise and vibration, usually depend upon its valve train system. With the increase of diesel engine's power and speed, it is required that the diesel engine runs steadily and reliably. This demands that the valve train system should have a higher performance. But during the bench test, it is found that the exhaust temperature of the engine is somewhat higher than permitted.R16V280ZJ diesel engine developed by the Qishuyan Locomotive and Rolling Stock Works in cooperation with AVL corporation, is one for the internal combustion locomotives, with the biggest power at home, good economic performance and brilliant future. In order to solve the problem and improve the performance of R16V280ZJ diesel engine, an improving design has been made for its valve cam profile. The main works are as follows: The dynamic performance has been verified using the valve train kinematic and dynamic calculation, according to the result of the curve fitting and the corresponding valve train parameters. To solve the problems existing in the original valve train of R16V280ZJ diesel engine, a new valve cam profile was designed.Through the working process simulative calculation, in comparison to the original calculation with the same related parameters, it is demonstrated that the exhaust temperature is reduced to some extent, and the performance of diesel engine is improved. With the new camshaft, the diesel engine has been equipped, and the test results show that the exhaust temperature of diesel engine has been reduced to some extent, and at the same time the comprehensive performance has been improved.