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Vehicle control method, device, system, and vehicle

A vehicle control system and vehicle control technology, applied in the direction of measuring devices, vehicle testing, machine/structural component testing, etc., to achieve the effects of saving fuel consumption, reducing fuel consumption, and improving diagnosis probability

Active Publication Date: 2022-07-15
上海元城汽车技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method makes the range-extended vehicle need to be diagnosed by creating an independent idling condition, resulting in additional fuel consumption and NVH (Noise, Vibration, Harshness, noise, vibration and harshness) and other issues

Method used

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  • Vehicle control method, device, system, and vehicle
  • Vehicle control method, device, system, and vehicle
  • Vehicle control method, device, system, and vehicle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] figure 1 It is a flowchart of the vehicle control method provided in the first embodiment of the present invention. This embodiment can be applied to the situation where the engine management system EMS of the extended-range vehicle performs power adjustment in response to the vehicle controller VCU to perform OBD diagnosis, the method can be determined by The engine management system EMS is implemented, which includes the following steps:

[0036] Step 110: Receive a power request initiated by the VCU during driving, where the power request includes the requested power value.

[0037] The power request initiated by the VCU is received during the driving of the extended-range vehicle. Extended-range electric vehicles refer to the addition of an engine to charge the power battery or an indirect drive motor to increase the battery life on the basis of pure electric vehicles. mileage , so as to overcome the electric vehicles with short mileage of pure electric vehicles....

Embodiment 2

[0066] image 3 It is a schematic structural diagram of the vehicle control device provided in the second embodiment of the present invention. This embodiment can be applied to the situation where the engine management system EMS of the extended-range vehicle performs power adjustment in response to the vehicle controller VCU for OBD diagnosis. It is implemented by the engine management system EMS, and specifically includes: a power request receiving module 210 , a first judging module 220 , a second judging module 230 and a detection and activation module 240 .

[0067] a power request receiving module 210, configured to receive a power request initiated by the VCU, where the power request includes the requested power value;

[0068] The first judgment module 220 is used for judging whether the power value is less than or equal to the preset power value;

[0069] The second judging module 230 is configured to judge whether the preset diagnosis activation condition is met if ...

Embodiment 3

[0085] Figure 5 It is a schematic diagram of the vehicle control system provided by the third embodiment of the present invention, including VCU310 and EMS320;

[0086] The VCU310 is used to send the power demand to the EMS320 if it detects that the battery discharge power is insufficient to meet the power demand of the vehicle during driving;

[0087] The EMS320 receives the power request initiated by the VCU310, and the power request includes the requested power value;

[0088] EMS320 determines whether the power value is less than or equal to the preset power value;

[0089] If the power value is less than or equal to the preset power value, the EMS320 determines whether the preset diagnosis start condition is met;

[0090] If the EMS 320 satisfies the preset diagnosis start condition, the target OBD diagnosis is started.

[0091] Further, the EMS320 is used to judge whether the power value is less than the acceptable power increase value of the battery; if the power va...

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Abstract

The invention discloses a vehicle control method, device, system and vehicle. The method includes: receiving a power request initiated by a VCU during driving, where the power request includes the requested power value; and judging whether the power value is less than or equal to a preset power value; If the power value is less than or equal to the preset power value, it is determined whether the preset diagnosis starting condition is met; if the preset diagnosis starting condition is met, the target OBD diagnosis is started. The vehicle control solution provided by the embodiment of the present application can perform the target OBD diagnosis when it is determined during the driving process that the power value requested by the VCU is less than or equal to the preset power value and meets the preset diagnosis start conditions, without actively controlling the vehicle to create an idling operation. The target OBD diagnosis is carried out under the condition of the target OBD, thereby reducing the fuel consumption and avoiding the NVH problem caused by entering the idling condition due to the target OBD diagnosis.

Description

technical field [0001] Embodiments of the present invention relate to vehicle control technologies, and in particular, to a vehicle control method, device, system, and vehicle. Background technique [0002] With the development of new energy vehicles, the detection of new energy vehicles has become an important guarantee for vehicle safety. In the OBD (OnBoard Diagnostics, automotive fault diagnosis system) detection process, some of the diagnostic contents (such as catalytic converter conversion efficiency diagnosis, crankcase ventilation system leakage diagnosis, etc.) require the engine to have stable intake air flow and low intake pressure. Wait. Typically EMS manufacturers perform these diagnostics while the vehicle is at idle. Range-extended vehicles are based on electric vehicles and provide range-extending through engines. [0003] Usually, when the above-mentioned OBD diagnosis is performed on the extended-range vehicle, it is necessary to actively control the ex...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M17/007
CPCG01M17/007
Inventor 熊华锋陈领平戴西槐王真牛胜福
Owner 上海元城汽车技术有限公司
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