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Engine start-stop control method, device and system

An engine system and start-stop control technology, applied in the automotive field, can solve the problems of long engine start-up time and low driving comfort of the driver, and achieve the effects of shortening start-up time, improving driving comfort and reducing vibration

Inactive Publication Date: 2018-07-24
ZHEJIANG GEELY AUTOMOBILE RES INST CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of this, the purpose of the present invention is to provide an engine start-stop control method, device and system, to alleviate the technical problem of the existing engine start-stop system, the engine start-up time is long, resulting in low driving comfort for the driver

Method used

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  • Engine start-stop control method, device and system
  • Engine start-stop control method, device and system

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Embodiment 1

[0031] An engine start-stop control method provided by an embodiment of the present invention can be applied to the engine system of a hybrid vehicle, such as a 48V mild hybrid system (referred to as a 48V mild hybrid system), which can be used for engine start-stop, starting, Optimization under braking and other working conditions can save fuel and reduce emissions, and improve driver comfort.

[0032] Such as figure 1 Shown is a flow chart of an engine start-stop control method, the method comprising the following steps:

[0033] Step S102, when the engine in the normal running state satisfies the shutdown condition, it is judged whether the current vehicle satisfies the quick start condition;

[0034] Usually, the above-mentioned normal state is the current normal driving state. During the current driving process of the vehicle, after the driver performs a braking operation, the engine of the vehicle will enter the shutdown state. At this time, it can be determined that th...

Embodiment 2

[0079] On the basis of the above-mentioned embodiments, the embodiment of the present invention also provides an engine start-stop control device, which can be set in the engine system of a hybrid vehicle, such as Figure 4 A structural schematic diagram of an engine start-stop control device is shown, including the following structure:

[0080] The judging module 40 is used for judging whether the current vehicle meets the quick start condition when the engine in the normal running state meets the stop condition, wherein the quick start condition is that the motor system of the current vehicle supports the Conditions under which the engine is maintained at a specific RPM value;

[0081] The rotational speed maintenance module 42 is configured to trigger the engine oil cut-off when the determination result of the first determination module is yes, and send a rotational speed maintenance signal to the motor system, so that the rotational speed of the engine drops to the specifi...

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Abstract

The invention provides an engine start-stop control method, device and system and relates to the technical field of automobile. The method comprises: when an engine in normal running state meets stopconditions, judging whether a current vehicle meets quick start conditions; if yes, triggering engine fuel interruption, and transmitting a speed maintenance signal to a motor system so that when thespeed of the engine drops to a specific value, the speed of the engine is maintained to the specific value; when the speed of the engine is maintained within a time threshold of the specific value, monitoring whether the current vehicle meets start request conditions; if yes, triggering start of the engine. The engine start-stop control method, device and system have the advantages that when a vehicle meets the start request conditions, the engine is started quickly; engine start time is shortened, and shake of the engine upon start is relieved; driving comfort can be improved for a driver.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to an engine start-stop control method, device and system. Background technique [0002] Hybrid electric vehicles are a new generation of clean vehicles with low fuel consumption and low pollution. It is an effective combination of traditional internal combustion engine vehicles and electric vehicles. It not only inherits the advantages of low emissions from electric vehicles, but also develops the advantages of high specific energy and specific power of petroleum fuels, and significantly improves the emissions and fuel economy of traditional internal combustion engine vehicles. [0003] Generally, hybrid vehicles are equipped with an engine start-stop system. The engine start-stop system is a system that automatically turns off the engine when the vehicle stops temporarily (for example, waiting for a traffic light), and restarts the engine automatically when it needs to move on...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60W30/18
CPCB60W30/18018B60W2510/0638
Inventor 张容波
Owner ZHEJIANG GEELY AUTOMOBILE RES INST CO LTD
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