Arrangement method of engine TMAP (Air Temperature and Manifold Absolutely Pressure) sensor

Abstract

The invention belongs to the technical field of automobile engine development, and particularly relates to an arrangement method of an engine TMAP (Air Temperature and Manifold Absolutely Pressure) sensor. The arrangement method comprises the following steps: (A) collecting geometric models of an engine intake manifold, and grouping and meshing the geometric models; (B) calculating according to engine one-dimensional thermodynamics to obtain periodic transient boundary conditions of each inlet and outlet; (C) applying the periodic transient boundary conditions in the step B to the meshed models obtained by the step A and then performing iterative calculation; (D) discovering a point or a region with the most stable pressure change for arranging the TMAP sensor according to the calculation result. Through the steps, the best TMAP sensor arrangement position can be analyzed before trial production of a sample; meanwhile, effect comparison of different arrangement positions can also be performed. The research and development efficiency is improved and a large amount of material cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of automobile engine development, in particular to a method for arranging an engine TMAP sensor. Background technique [0002] The engine TMAP sensor is one of the important sensors on the car. It detects the air pressure and temperature in the intake manifold, and is used to correct the fuel injection amount of the engine to ensure the normal operation of the engine. However, the location of the TMAP sensor is unreasonable, which has a great impact on its signal detection. At present, in the development process of automobile engines, computer fluid dynamics (CFD) technology is rarely used to analyze the rationality of TMAP sensor placement. Because it is difficult to determine the flow inside the engine's intake manifold during testing, it is difficult for designers to determine the root cause of the problem. Contents of the invention [0003] The purpose of the present invention is to provide a method ...

AI Technical Summary

Problems solved by technology

However, the location of the TMAP sensor is unreasonable, which has a great impact on its signal detection.

At present, in the development process of automobile engines, computer fluid dynamics (CFD) technology is rarely used to analyze the rationality of TMAP sensor placement. Because it is difficult to determine the flow conditions inside the engine intake manifold during the test, it is difficult for the designer to determine the root cause of the problem

Images