Method and engine for calculating intake air temperature and intercooler efficiency of an engine

Abstract

The invention provides a method for calculating engine intake temperature and intercooler efficiency and an engine. A temperature pressure sensor is mounted in an intake manifold position for measuring a gas temperature T22 in the intake manifold position; a reverse intake temperature T21 is calculated through a specific model; and the temperature pressure sensor is mounted on the intake manifold, is controlled by an engine factory, and is convenient to mount and simple in design. A specific logic is integrated in an electronic control unit of the engine, so that the pipeline design has no need to change, the cost is saved, and the mating is simple.

Description

technical field [0001] The invention relates to the calculation of the intake air temperature of the engine, in particular to a method for calculating the intake air temperature of the engine, a method for calculating the efficiency of an intercooler and the engine. Background technique [0002] Exhaust Gas Recirculation (EGR for short) is to draw part of the exhaust gas generated by the diesel engine or gasoline engine out of the exhaust pipe, and introduce an appropriate amount of exhaust gas into the intake pipe through a control valve, such as the EGR valve, to mix with fresh air. It is an emission control technology that enters the combustion chamber to participate in combustion. Because the exhaust gas contains a large amount of CO2, CO2 cannot be burned but absorbs a large amount of heat, thereby reducing the combustion temperature of the mixture in the cylinder, thereby reducing the amount of NOx produced. [0003] Such as figure 1 As shown, the entire EGR working ...

AI Technical Summary

Problems solved by technology

[0005] 1) The pipeline before the throttle valve after the intercooler is not controlled by the engine manufacturer, so it is difficult to match the whole vehicle, and it is particularly inconvenient to install the intake air temperature and pressure sensor here;

[0006] 2) The throttle valve is a separate component. If a section of pipeline is redesigned before the throttle valve, not only the connection is complicated, but also there is a risk of air leakage;

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