Exhaust gas temperature testing system and method for vehicle nitrogen oxide sensor
By integrating T4 and T7 sensors and employing a heat exchange method using ceramic chips and an oxynitride control box, the problem of excessive sensor count in the DOC+DPF+SCR system was solved, resulting in reduced cost and complexity, while improving the accuracy of temperature measurement.
CN117569903BActive Publication Date: 2026-05-29HUASHIDE ELECTRONIC TECH (KUNSHAN) CO LTD
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- HUASHIDE ELECTRONIC TECH (KUNSHAN) CO LTD
- Filing Date
- 2023-11-13
- Publication Date
- 2026-05-29
AI Technical Summary
Technical Problem
Setting up four temperature acquisition points in the existing DOC+DPF+SCR system increases production costs and system complexity.
Method used
The T4 exhaust temperature sensor is integrated with the upstream NOx sensor, and the T7 sensor is integrated with the downstream NOx sensor to reduce the number of sensors. A ceramic chip and a NOx control box are used, and heat exchange is formed between the heating electrode and the exhaust gas. The exhaust temperature is calculated by combining linear interpolation.
Benefits of technology
It reduces the cost and complexity of the engine aftertreatment system and improves the accuracy and efficiency of temperature measurement.
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Figure CN117569903B_ABST
Abstract
The application relates to an exhaust temperature testing system and method for a nitrogen oxide sensor for a vehicle, which comprises a DOC assembly section, a DPF assembly section and an SCR assembly section, the DPF assembly section is arranged between the DOC assembly section and the SCR assembly section, an upstream nitrogen oxide sensor is arranged at the upstream of the DOC assembly section, a downstream nitrogen oxide sensor is arranged at the downstream of the SCR assembly section, a T5 temperature sensor is arranged between the DOC assembly section and the DPF assembly section, and a T6 temperature sensor is arranged between the DPF assembly section and the SCR assembly section. The exhaust temperature testing system and method for the nitrogen oxide sensor for the vehicle can integrate the T4 exhaust temperature sensor and the upstream nitrogen oxide sensor and integrate the T7 and the downstream nitrogen oxide sensor on the basis of the existing aftertreatment system, the number of sensors in the aftertreatment system is reduced, and the cost and the complexity of the engine aftertreatment system can be reduced.
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