Control method, device and system of engine virtual environment temperature sensor

A temperature sensor and ambient temperature technology, applied in the field of vehicle sensors, can solve the problems of high development and maintenance costs of temperature sensors, inability to carry out secondary development, long technology update cycle, etc., to solve high development and maintenance costs and facilitate secondary The effect of development and cost reduction

Active Publication Date: 2018-04-27
WEICHAI POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the development and maintenance costs of the physical engine ambient temperature sensor are high, the price is expensive, the technology update cycle is long and secondary development cannot be carried out

Method used

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  • Control method, device and system of engine virtual environment temperature sensor
  • Control method, device and system of engine virtual environment temperature sensor
  • Control method, device and system of engine virtual environment temperature sensor

Examples

Experimental program
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Effect test

Embodiment 1

[0049] figure 1 It is a flow chart of the control method of the engine virtual environment temperature sensor provided in Embodiment 1 of the present invention. This embodiment is applicable to the situation of detecting the ambient temperature. The method can be executed by the control device of the engine virtual environment temperature sensor. The control device can Integrated in the engine's control system. refer to figure 1 , the control method specifically includes the following steps:

[0050] Step S110, the engine is started, the temperature signals collected by multiple sensors integrated in the engine are obtained in real time, and the ambient temperature reference value corresponding to the temperature signal of each sensor is determined.

[0051] The engine itself includes many sensors, such as water temperature sensor, exhaust temperature sensor and so on. When the engine starts and works, each sensor can receive the power supply of the engine, so each sensor c...

Embodiment 2

[0067] figure 2 It is a flow chart of a control method for an engine virtual environment temperature sensor provided in Embodiment 2 of the present invention. This embodiment is based on the technical solution described in the first embodiment above, and further provides an optional control method of the engine virtual environment temperature sensor.

[0068] refer to figure 2 As shown, optionally, for the operation of step S110 provided in the first embodiment above, the engine is started, the temperature signals collected by multiple sensors integrated in the engine are acquired in real time, and the ambient temperature corresponding to the temperature signal of each sensor is determined Reference values, including:

[0069] Step S111, determining the temperature lower limit calibration value, temperature upper limit calibration value, and temperature preset calibration value corresponding to the sensor, wherein the temperature signal collected by the sensor includes a t...

Embodiment 3

[0096] image 3 It is a structural schematic diagram of the control device of the engine virtual environment temperature sensor provided in the third embodiment of the present invention. The control device provided in this embodiment can execute the control method of any of the above embodiments, the engine is electrically connected to the electronic control unit, and the specific structure of the control device is as follows:

[0097] The ambient temperature reference value determination module 310 is used to start the engine, acquire temperature signals collected by multiple sensors integrated in the engine in real time, and determine the ambient temperature reference value corresponding to the temperature signal of each sensor;

[0098] The ambient temperature calculation value determination module 320 is used to perform virtual ambient temperature sensor calculations on the ambient temperature reference values ​​of multiple sensors to determine the ambient temperature calc...

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Abstract

The embodiment of the invention disclsoes a control method, device and system of an engine virtual environment temperature sensor. An engine is electrically connected to an electronic control unit. The control method comprises the steps of starting the engine, obtaining temperature signals collected by a plurality of sensors integrated in the engine in real time, and determining the environment temperature reference value corresponding to the temperature signal of each sensor; calculating the environment temperature reference values of a plurality of sensors through the virtual environment temperature sensor to determine the environment temperature calculated values; and obtaining the downtime duration information of the engine and the on-off state of the electronic control unit in real time, and determining the environment temperature calculated values as the environment temperature values when it is detected that the downtime duration of the engine is longer than or equal to the settime threshold and the electronic control unit is switched on from off. According to the embodiment of the invention, the virtualization of the engine environment temperature sensor is achieved, and the cost is reduced; and the control method facilitates secondary development.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of vehicle sensors, in particular to a control method, device, and system for an engine virtual environment temperature sensor. Background technique [0002] In order to achieve precise control of engine performance or emissions, more and more sensors or actuators are integrated on the engine, and the ambient temperature sensor is one of the more critical sensors. [0003] Existing vehicle engines are mostly equipped with physical ambient temperature sensors to detect the ambient temperature in real time, so as to correct various control parameters such as the injection amount of the engine and the heating state of urea according to the ambient temperature. [0004] However, the development and maintenance costs of the physical engine ambient temperature sensor are high, the price is expensive, the technology update cycle is long and secondary development cannot be carried out. Conten...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02N11/08
CPCF02N11/08F02N2200/122Y02T10/40
Inventor 李万洋马永超梁健星
Owner WEICHAI POWER CO LTD
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