Rapid bench examination and modeling method for engine

Abstract

The invention discloses a bench testing method during the development process of an engine as well as a method for building an engine model, including testing the engine under the operation conditions of a plurality of actual engines and searching the actual engine data which accords with the operation conditions of the actual engine; confirming a plurality of parameter functions based on the actual engine data and each parameter function is corresponding to one operation parameter of the engine; generating a plurality of combustion functions used for the operation conditions of a plurality of engines which include a plurality of the operation conditions of the actual engines and a plurality of the operation conditions of virtual engines; calibrating the virtual model of the engine based on a plurality of combustion parameters and applying the virtual model to carry out bench testing on a plurality of engines.

Description

technical field [0001] The present invention relates to internal combustion engine development, and more particularly to a method for rapid internal combustion engine bench testing and modeling that improves and simplifies the engine development process. Background technique [0002] The statements in this section merely provide background material related to the present invention and may not constitute prior art. [0003] Internal combustion engines generate drive torque by combusting an air-fuel mixture. More specifically, air is drawn into the intake manifold through the throttle valve, where it is distributed to the cylinders and mixed with fuel. This air-fuel mixture is compressed within the cylinder by a reciprocating piston. The compressed air-fuel mixture is combusted and the resulting combustion drives the pistons in the cylinders, which rotationally drive the crankshaft. [0004] Advances in automotive engine technology have resulted in engines being equipped wi...

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Problems solved by technology

Therefore, the application of this method is limited and it is not suitable for engines with multiple complex control options

In addition, the prediction of combustion parameters is carried out in the neighborhood of the reference point, as long as the model is switched to a different reference point, it will cause discontinuity in the obtained combustion parameters

Finally, although the combustion parameters predicted by the above method are relatively complete for the engine used, this method is limited to spark ignition (SI) engines and cannot be flexibly applied to other types of engines such as compression ignition direct injection (CIDI) engines and homogeneous combustion engines. Mass charge compression combustion (HCCI) engines, etc.

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