Control method and system for passive regeneration of hybrid electric vehicle

A hybrid electric vehicle and passive regeneration technology, applied in the field of vehicle emissions, can solve problems such as probability reduction and achieve the effect of high-efficiency regeneration

Active Publication Date: 2021-10-15
ANHUI JIANGHUAI AUTOMOBILE GRP CORP LTD
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Problems solved by technology

[0003] The invention provides a passive regeneration control method and system of a hybrid electric vehicle, which solves the problem that the probability of passive regeneration in existing hybrid electric vehicles is reduced, and enables hybrid electric

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  • Control method and system for passive regeneration of hybrid electric vehicle
  • Control method and system for passive regeneration of hybrid electric vehicle

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Embodiment Construction

[0039] In order to enable those skilled in the art to better understand the solutions of the embodiments of the present invention, the embodiments of the present invention will be further described in detail below in conjunction with the drawings and implementations.

[0040] In order to achieve the purpose of saving fuel during taxiing, traditional models (only models with internal combustion engines) will set the operation of fuel cut-off of the injector. In the process of fuel cut-off of the injector, the engine is actually dragged backwards by the whole vehicle to continue to work. At this time, a large amount of fresh air will be pumped into the exhaust system, and the GPF in it will continue to work at its own temperature. When a certain value is reached, passive regeneration will be triggered, and the carbon particles attached to the GPF will be burned quickly. However, the sliding strategy of the P13 hybrid vehicle is quite different from the traditional model. During ...

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Abstract

The invention provides a control method and system for passive regeneration of a hybrid electric vehicle. The method comprises the steps that the pressure difference between the front end and the rear end of a vehicle-mounted GPF is obtained, and a vehicle control unit calculates to obtain the carbon load of the vehicle-mounted GPF according to the pressure difference; if the carbon load is smaller than a first limit value, GPF accumulated carbon removal is not carried out, and if the carbon load is larger than a second limit value, active regeneration is carried out, wherein the second limit value is larger than the first limit value; and when the carbon load is smaller than the second limit value and larger than the first limit value, the inlet temperature of the vehicle-mounted GPF and the SOC of a battery are obtained, whether passive regeneration conditions are met or not is judged according to the inlet temperature of the GPF and the SOC of the battery, and if yes, the vehicle-mounted GPF is controlled to conduct passive regeneration. By means of the method, the hybrid power vehicle not prone to entering passive regeneration can also effectively enter a passive regeneration program, so that accumulated carbon particles are efficiently regenerated, and the situation that the hybrid power vehicle frequently enters active regeneration to affect drivability and economical efficiency is avoided.

Description

technical field [0001] The invention relates to the technical field of vehicle emission, in particular to a passive regeneration control method and system for a hybrid vehicle. Background technique [0002] GPF (Gasoline Particulate Filter, gasoline engine particulate filter) is used to capture particulate emissions from gasoline engines, thereby reducing particulate matter (PM) and number (PN). When the carbon particles from gasoline engine exhaust are captured by the GPF and accumulate continuously in the GPF, when the accumulation of carbon load exceeds a certain limit, it will lead to adverse effects such as an increase in exhaust back pressure, a decrease in power performance, and an increase in fuel consumption. Therefore, it is necessary to control the GPF Perform regeneration control. The regeneration of GPF is divided into two modes: active regeneration and passive regeneration. Among them, passive regeneration has high efficiency and does not affect driving and ec...

Claims

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Application Information

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IPC IPC(8): F01N9/00F01N3/023F01N11/00
CPCF01N9/002F01N3/023F01N3/0238F01N11/002F01N2590/11Y02T10/40
Inventor 胡璋林刘文彬崔有利温敏涂安全张世昊
Owner ANHUI JIANGHUAI AUTOMOBILE GRP CORP LTD
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