Method and system for engine warm-up control of hybrid electric vehicle

A hybrid vehicle and engine preheating technology, which is applied to hybrid vehicles, engine components, machines/engines, etc., can solve problems such as poor start-up performance, impact on the environment, and high pollutant emissions, so as to reduce emissions and improve start-up performance Effect

Active Publication Date: 2017-01-04
BEIJING BORGWARD AUTOMOBILE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The engines of common hybrid electric vehicles include diesel engines and gasoline engines. When the working mode of hybrid electric vehicles is switched from pure electric mode to series mode or parallel mode, the engine needs to be started first, but the engine (especially the diesel engine) is under low temperature environment. The starting performance is poor, and the emission of pollutants is relatively high, which seriously affects the environment. Therefore, it is necessary to preheat the engine before starting the engine to minimize emissions and improve the starting function

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  • Method and system for engine warm-up control of hybrid electric vehicle
  • Method and system for engine warm-up control of hybrid electric vehicle
  • Method and system for engine warm-up control of hybrid electric vehicle

Examples

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Embodiment 1

[0065] This embodiment provides a method for controlling engine warm-up of a hybrid electric vehicle, such as figure 1 shown, including the following steps:

[0066] Acquiring the electric quantity of the on-board battery of the hybrid electric vehicle.

[0067] When the electric quantity is lower than the set threshold value, judge whether to need to carry out engine preheating according to the working mode that described hybrid electric vehicle will switch from pure electric mode, if so, then the engine is preheated, if not, then start the engine, The working modes to be switched include series mode and parallel mode.

[0068] In specific applications, the above steps can be performed by HCU (Hybrid Control Unit) and / or ECU (Engine Control Unit), as a most preferred way, such as Figure 6 As shown, the HCU (Hybrid Power Control Unit) can be used to execute the relevant judgment part, such as judging whether the engine needs to be warmed up according to the working mode of ...

Embodiment 2

[0071] On the basis of embodiment 1, the engine warm-up control method of the hybrid electric vehicle described in this embodiment, such as figure 2 As shown in , when the working mode to be switched to is the series mode, it is determined that the engine needs to be warmed up.

[0072] In specific applications, some hybrid electric vehicles only have pure electric mode and series mode, some hybrid electric vehicles only have pure electric mode and parallel mode, and some hybrid electric vehicles have all the above three modes. In any case, when the battery power is reduced to a certain level, the HCU will make a judgment on the need to switch from the pure electric mode to the series mode or the parallel mode after obtaining the battery status. At this time, for the case that only includes the series mode, The HCU will send a series mode switching request to the ECU, and the working mode to be switched is to switch from the pure electric mode to the series mode, which requir...

Embodiment 3

[0104] This embodiment provides an engine warm-up control system for a hybrid vehicle, such as Figure 4 , Figure 5 shown, including:

[0105] The obtaining module is used to obtain the electric quantity of the on-board battery of the hybrid electric vehicle.

[0106] A judging module, used to judge whether the engine needs to be preheated according to the working mode to be switched from the pure electric mode to the hybrid electric vehicle when the electric quantity is lower than the set threshold, if so, to preheat the engine, if not , the engine is started, and the working modes to be switched include series mode and parallel mode.

[0107] The engine warm-up control system of the hybrid electric vehicle described in this embodiment, when the electric quantity of the on-board battery of the hybrid electric vehicle is lower than the set threshold value, that is, the demand for the hybrid electric vehicle to switch from the mode, The working mode to be switched to by the...

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Abstract

The present invention provides an engine preheating control method and system. When the power of the on-board battery of the hybrid electric vehicle is lower than a set threshold, that is, when the hybrid electric vehicle needs to switch from mode to The working mode to be switched to determines whether the engine needs to be warmed up, if so, the engine will be warmed up, and if not, the engine will be started. Therefore, the engine warm-up control method and system of the present invention will control the engine warm-up according to the dynamically changing working mode of the hybrid electric vehicle, and even if the engine warm-up is started, it will always judge whether the engine warm-up needs to be continued. , If necessary, the engine will continue to be preheated. If not, it will stop the engine preheating and start the engine, which can effectively control the engine preheating according to the actual operating state of the hybrid vehicle, reduce pollutant emissions, and improve engine start-up performance.

Description

technical field [0001] The invention relates to the technical field of engine control. Specifically, it relates to an engine preheating control method and system for a hybrid electric vehicle. Background technique [0002] A hybrid electric vehicle (HEV) refers to a vehicle that has at least two power sources and uses one or more of them to provide part or all of the power. Hybrid electric vehicle has 3 driving working modes, namely pure electric mode, series mode and parallel mode. In the series mode, the engine of the hybrid electric vehicle only drives the generator to generate electricity, and the generated electric energy is transmitted to the battery through the control unit, and then the battery is transmitted to the motor to convert into kinetic energy, and finally drives the vehicle through the transmission mechanism; in the parallel mode, the engine of the hybrid electric vehicle It is used to drive and generate electricity at the same time, that is, the role of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02N19/02B60W10/06B60W20/15B60W40/00
Inventor 吕朝鹏
Owner BEIJING BORGWARD AUTOMOBILE CO LTD
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