Method and device for detecting intake air temperature of engine system and vehicle
A technology of engine system and intake air temperature, which is applied in the direction of fuel air intake, etc., can solve the problems of temperature measurement accuracy influence, poor interchangeability, easy aging of components, etc., achieve accurate and reliable detection of intake air temperature, and reduce layout and installation work , the effect of high practical value
Active Publication Date: 2019-09-20
BORGWARD AUTOMOTIVE CHINA CO LTD
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Problems solved by technology
There are the following disadvantages: the relationship between resistance and temperature is seriously non-linear, so the temperature measurement accuracy is affected; the consistency of the components is poor, and the interchangeability is poor; the components are easy to age and the stability is poor
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[0035] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.
[0036] The method, device and vehicle for detecting the intake air temperature of the engine system according to the embodiments of the present invention will be described below with reference to the accompanying drawings.
[0037] Before describing the intake air temperature detection method of the engine system according to the embodiment of the present invention, firstly, the attached image 3 The engine system in the intake air temperature detection method of the engine system according to the embodiment of the present invention will...
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The invention discloses a detection method and device for the gas inlet temperature of an engine system and a vehicle. The method comprises the steps that gas inlet relevant parameters of the engine system are obtained; according to the gas inlet relevant parameters, kinetic equations of gas in a gas inlet manifold are established, wherein the kinetic equations comprise the temperature kinetic equation and the pressure dynamic equation of the gas in the gas inlet manifold; according to the temperature kinetic equation and the pressure kinetic equation of the gas in the gas inlet manifold, a first relation between the temperature and the pressure is obtained; according to the current gas temperature in the gas inlet manifold and the temperature variable quantity in the gas inlet manifold after the predetermined time, a second relation between the gas temperature in the gas inlet manifold after the predetermined time and the current gas temperature is obtained; and the first relation is substituted into the second relation, and solving is conducted through a kalman filter to obtain the engine gas inlet temperature. The gas inlet temperature detection method of the engine system of the embodiment of the invention has the advantage that detection of the gas inlet temperature of an engine is accurate and reliable.
Description
technical field [0001] The invention relates to the technical field of automobiles, in particular to a method and device for detecting an intake air temperature of an engine system and a vehicle. Background technique [0002] Fresh air enters the engine cylinders for combustion through the engine intake manifold. Whether it is a gasoline engine, a diesel engine or a natural gas engine, it has its specific theoretical air-fuel ratio. In order to make the engine work in the best state, the amount of fuel supplied to the cylinder is mainly determined according to the theoretical air-fuel ratio of the engine and the amount of intake air. Therefore, it is very important to accurately measure the intake air volume of the engine. In related technologies, the intake air temperature and pressure are measured by sensors, etc., and the intake air volume is calculated in combination with the volume of the space where the gas is located. The intake air temperature sensor is used to mea...
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IPC IPC(8): F02M35/10
Inventor 刘婷丁月芹
Owner BORGWARD AUTOMOTIVE CHINA CO LTD