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A drivability limitation control method for a vehicle and its emission fault

A technology of drivability and control method, which is applied in the field of drivability limitation control of vehicles and their emission faults, can solve the problems that vehicles cannot effectively implement restrictions, and achieve the effects of facilitating fault control, reducing continuous hazards, and reducing emission pollution

Active Publication Date: 2021-12-21
ZHENGZHOU YUTONG BUS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a drivability limitation control method for a vehicle and its emission faults, to solve the problem that existing vehicles cannot effectively implement restrictions after severe emission faults occur

Method used

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  • A drivability limitation control method for a vehicle and its emission fault
  • A drivability limitation control method for a vehicle and its emission fault
  • A drivability limitation control method for a vehicle and its emission fault

Examples

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Embodiment 1

[0034] The present invention provides a drivability limit control method for vehicle emission faults. The vehicle used includes two power sources, namely an engine and a drive motor. If the engine has an emission fault, it will generate a drivability limit command. This embodiment is When a serious emission fault occurs, a severe drivability restriction command is generated; the engine ECU monitors the emission-related components and exhaust pollutants in real time, and diagnoses the vehicle emission status in real time through the OBD system. The severity of the emission fault can be determined by existing technologies Judgment is not limited in this embodiment.

[0035] Such as figure 1 As shown, when a severe drivability restriction instruction is received, it is judged whether the severe drivability restriction is activated; if the severe drivability restriction is activated, it is judged whether the current vehicle speed is greater than the set speed threshold V 0 , if t...

Embodiment 2

[0041] The present invention provides a drivability limitation control method for vehicle emission faults. On the basis of the above-mentioned method embodiment 1, the drivability limitation includes the primary drivability limitation function of this embodiment in addition to the serious drivability limitation, such as figure 2 As shown, when the severe drivability restriction instruction is received, it is also judged whether the primary drivability restriction is activated; if the primary drivability restriction is activated, then continue to judge whether the severe drivability restriction is activated. Wherein, the condition for activating the primary drivability limitation is: the vehicle speed drops to zero after the primary drivability limitation is pre-activated.

[0042] If the primary drivability restriction is not activated, enter the pre-activation state of the primary drivability restriction after receiving the primary drivability restriction instruction or recei...

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Abstract

The invention relates to a drivability limitation control method for a vehicle and an emission fault thereof. When a severe drivability limitation instruction is received, it is judged whether the severe drivability limitation is activated; if the severe drivability limitation is activated, it is judged whether the current vehicle speed is greater than the set Vehicle speed threshold, if the current vehicle speed is greater than the set vehicle speed threshold, the vehicle demand torque is set to zero. After a serious fault occurs in the vehicle emission, it enters the severe drivability limit. When the vehicle speed is high, the torque demand of the vehicle is set to zero, preventing the vehicle from continuing to accelerate, reducing the air pollution caused by emission degradation, and the activation condition can be activated in time through the severe drivability limit. Start or implement restrictions on the driving performance of vehicles under serious emission faults, and urge drivers to maintain the faults that affect emission performance, so as to reduce the continuous harm of vehicles with degraded emissions to air quality.

Description

technical field [0001] The invention relates to a drivability limitation control method for a vehicle and its emission failure. Background technique [0002] As one of the power sources of hybrid vehicles, the engine also needs to monitor and diagnose its emission performance in real time, and take appropriate measures to urge the driver to maintain the faults that affect emission performance in time to ensure the emission of hybrid vehicles. performance. [0003] For traditional fuel vehicles, when a traditional fuel vehicle has an emission failure, it is generally necessary to limit the output torque and vehicle speed through the engine's own control when the vehicle speed is low or the vehicle is stopped and then restarted. Serious emission failure, if the engine is still restricted when the above conditions are met, for example, the vehicle will not restrict the engine after the emission failure occurs, which will cause serious air pollution and even damage the vehicle....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60W30/18B60W40/105
CPCB60W30/18009B60W40/105B60W2510/0657
Inventor 郝斌刘宗剑高建平王秋杰肖丹丹苏常军李涛张春敏
Owner ZHENGZHOU YUTONG BUS CO LTD
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