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Oxygen sensor control system and method

An oxygen sensor and control system technology, applied in electrical control, engine control, machine/engine, etc., to improve data accuracy and reduce additional data load

Active Publication Date: 2018-03-30
CHINA FAW LIMITED WUXI FUEL INJECTIONEQUIP RES INST +2
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Problems solved by technology

The deficiencies and reasons of the technical solution in the said public document are: it mainly involves the determination of the engine working condition, the data acquisition and processing of the oxygen sensor and the control of the EGR valve, the data accuracy and response time of the oxygen sensor and the data load of the diesel engine controller None of the processing methods mentioned

Method used

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  • Oxygen sensor control system and method

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Embodiment Construction

[0038] The present invention will be further described below in conjunction with specific drawings and embodiments.

[0039] Such as figure 1 Shown: In order to reduce the impact of the exhaust pipe temperature change on the oxygen sensor 2 and improve the data acquisition accuracy of the oxygen sensor 2, the present invention includes an oxygen sensor 2 installed on the exhaust pipe, an oxygen sensor installed on the engine 1 camshaft 8 The speed sensor 4 and the accelerator pedal sensor 3 installed at the accelerator pedal 7; the oxygen sensor 2, the accelerator pedal sensor 3 and the speed sensor 4 are all connected with the oxygen sensor controller 5, and the oxygen sensor controller 5 is connected with the 2. The heating control module 10 for heating is connected;

[0040] The oxygen sensor 2 transmits the excess air signal collected by the oxygen sensor 2 and the current temperature near the probe of the oxygen sensor 2 to the oxygen sensor controller 5. The oxygen sen...

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Abstract

The invention relates to an oxygen sensor control system and method. The oxygen sensor control method includes the steps that an oxygen sensor controller judges the type and the current working condition of an engine according to a rotating speed signal and an oil quantity signal, selects a Map graph prestored in the oxygen sensor controller according to the judged type of the engine and determines a heating control signal according to the judged current working condition of the engine; the oxygen sensor controller controls a heating control module to heat an oxygen sensor according to the heating control signal so that a probe of the oxygen sensor can be in the optimal working temperature interval; after the probe of the oxygen sensor is in the optimal working temperature interval, the oxygen sensor controller determines an excessive air coefficient according to the selected Map graph and an excessive air signal collected by the oxygen sensor. The influence on the oxygen sensor by temperature changes of an exhaust tube can be reduced, data collection accuracy of the oxygen sensor can be improved, and the load on a main kernel processor by sensor data is reduced.

Description

technical field [0001] The invention relates to a control system and method, in particular to an oxygen sensor control system and method, belonging to the technical field of engine control. Background technique [0002] The document with the publication number CN103440003A discloses a heating control method of an oxygen sensor, which mainly realizes the heating control of the oxygen sensor. The technical means adopted in this public document and the effect achieved are: set the heating mode according to the start-up conditions, combine the characteristics of the oxygen sensor and the heating demand, determine the distribution of heating efficiency, and convert the distribution of heating efficiency into the control value of the heating switch, so as to realize the oxygen sensor as soon as possible. Enter the working state. After entering the ready-to-work state, a heating control mode with a constant duty cycle is provided to maintain the working state of the oxygen sensor....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D45/00
Inventor 张雷陆召振寇伟杨鹏翔周树艳杨源飞胡川
Owner CHINA FAW LIMITED WUXI FUEL INJECTIONEQUIP RES INST
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