发动机及其进气超压的检测方法和装置
By acquiring the first and second pressure values of the engine intake manifold and determining whether both exceed a threshold, an intake overpressure fault is identified. This solves the problem of inaccurate detection in existing technologies and achieves higher detection accuracy and protection effect.
CN117404178BActive Publication Date: 2026-07-17DONGFENG MOTOR GRP
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- DONGFENG MOTOR GRP
- Filing Date
- 2023-10-27
- Publication Date
- 2026-07-17
AI Technical Summary
Technical Problem
Existing methods for detecting engine intake overpressure cannot accurately determine intake overpressure, leading to engine reliability issues and damage.
Method used
By acquiring the first and second pressure values of the engine intake manifold, a diagnostic enable command is output when one of the pressure values exceeds a preset threshold for an extended period. An intake overpressure fault is determined when both pressure values exceed the threshold. Two-stage overpressure diagnosis is employed to improve detection accuracy.
Benefits of technology
It improves the accuracy of engine intake overpressure detection, reduces false alarms, protects the engine from damage, and balances power and reliability.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure CN117404178B_ABST
Abstract
本发明公开了一种发动机及其进气超压的检测方法和装置，涉及发动机进气压力检测的技术领域。检测方法通过获取发动机的进气管路的第一压力值和第二压力值，在第一压力值或第二压力值大于预设的压力阈值，且持续时间大于预设时长时输出诊断使能指令，以使能发动机超压检测的诊断窗口，根据诊断使能指令判断第一压力值和第二压力值均大于压力阈值时，确定发动机在进气过程中存在进气超压故障，由于第一压力值为发动机的节气门的入口压力值，第二压力值为节气门的出口压力值，能够实施两级超压诊断，规避了现有技术中采用单点检测引起的超压误报，进而提高了发动机进气超压检测的准确性。
Need to check novelty before this filing date? Find Prior Art