Adjustable two-stage supercharged engine model building method and simulation platform

Abstract

The embodiment of the present invention relates to the field of automotive electronic test technology, and discloses an adjustable two-stage supercharged engine model building method and a simulationplatform. In the invention, the method comprises the following steps of: obtaining multivariate nonlinear differential equations of an adjustable two-stage turbo supercharged engine; and decoupling and simplifying the multivariate nonlinear differential equations to obtain a real-time simulation model of the adjustable two-stage turbo supercharged engine. An embodiment of the invention also discloses an adjustable two-stage supercharged engine simulation platform. The embodiments of the present invention achieves semi-physical real-time simulation of the adjustable two-stage turbo superchargedengine and provides a basis for the development of control strategies for the engine and the two-stage turbo supercharged system.

Description

technical field [0001] The embodiment of the present invention relates to the technical field of automotive electronic testing, and in particular to a method for building an adjustable two-stage supercharged engine model and a simulation platform. Background technique [0002] In order to improve the power density of the engine, it is a common method to equip the engine with exhaust gas turbocharging, but the ordinary single-stage supercharging system is difficult to take into account the low-speed response and high-speed power problems, so an adjustable two-stage supercharging system is proposed to solve this problem. Contradictory issues. For an adjustable two-stage supercharger system, since it involves the energy distribution of the large and small superchargers, and needs to take into account the stability and dynamic response, the development of the control optimization algorithm is difficult and usually requires repeated trials. [0003] The inventor finds that there...

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Problems solved by technology

[0003] The inventor finds that there are at least the following problems in the prior art: in the existing engine hardware-in-the-loop simulation platform, the real-time simulation models adopted by the engine (such as gasoline engine) are basically conventional naturally aspirated engines or stand-alone turbocharged engines , it is impossible to study the control strategy of the latest two-stage supercharging system

However, this two-stage supercharging system model cannot realize real-time operation due to the huge amount of computation, and thus cannot interact with the controller to simulate the control algorithm.

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