Hui gate: I came to lead the time of the engine

The engine is the heart of the mechanical equipment, so it is always concerned by the manufacturers and users of the mechanical equipment. The good or bad of the engine directly affects the operation and use of the equipment, and reduces the efficiency.

In February 25th, the huemen powertrain of barSinger hausen huemen holding company (NASDAQ:FDML) has developed a simplified transient dynamic simulation model, which can be applied to simulate valve closing and predict the dynamic load of engine valves. By improving valve dynamic load and accurately calculating deformation pressure, we can predict valve life more accurately, which greatly helps R & D personnel to select materials at the beginning of new engine design.

When designing intake and exhaust valves of internal combustion engines (especially for internal combustion engines with high forced supercharging intake caused by turbocharging or turbocharging), load condition is the most important when valve closes. Because the valve design of new engine is not synchronized with the development of valve drive system, valve manufacturers often use simplified simulation models, and the test parameters are not accurate enough.

"The key to the design of the intake and exhaust valves lies in the dynamic load of the valve when the valve is closed," said Gian Maria Olivetti, the chief technical officer of the FAI power assembly. "The new model can help us to calculate and predict the peak value of the valve load faster, so as to ensure high quality and efficient development."

When the valve is closed, one side will first contact the seat ring, which will bring a huge load to the valve rod. The simplified transient dynamic simulation model, which is developed and tested by huaiming powertrain, can accurately calculate the load value, so that R & D personnel can configure the best parts from the beginning of the design, and accurately predict the service life.

Through the practical inspection of the valve test device, the hugate powertrain fully confirms that the simulation model is favorable for the evaluation of single valve actuation and single valve closing event. This model provides more flexible geometric characteristics for the test, optimizes the controllability of the measurement, and meets the requirement of measurement technology. Therefore, it is very suitable for verifying the simulation model of the cylinder head.

Guido Bayard, technical director of huaiming powertrain valve, said that the valve closing load value simulated by transient power FE can also be used to evaluate alternative valve design. "The geometric details, such as the throttle bar bite or the conical surface, affect the pressure distribution," he explained. Using simplified FE simulation, we can quickly determine the maximum load and potential failure of valves, and make correct decisions for design and material selection in the early stage of development.

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