Vehicle and driving performance limitation control method for emission fault of vehicle

Abstract

The invention relates to a vehicle and a driving performance limitation control method for an emission fault of the vehicle. The method comprises the steps: judging whether severe driving performancelimitation is activated or not when a severe driving performance limitation instruction is received; and if the severe driving performance limitation is activated, judging whether the current vehiclespeed is greater than a preset vehicle speed threshold, and if the current vehicle speed is greater than the preset vehicle speed threshold, setting the required torque of the whole vehicle to be zero. After the severe fault occurs in vehicle emission, severe driving performance limitation is entered, when the vehicle speed is high, the torque requirement of the whole vehicle is set to be zero, the vehicle is prevented from continuing to accelerate, and air pollution caused by emission degradation is reduced; and through the severe driving performance limitation activation condition, the driving performance limitation under the severe emission fault of the vehicle can be started in time or implemented, and a driver is urged to maintain the fault influencing the emission performance, so that the continuous harm of the vehicle with emission degradation to the air quality is reduced.

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....

Examples

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...

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....

Examples

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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