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Control method, device and vehicle for starting and stopping of dual-fuel engine

A dual-fuel engine and control method technology, applied in engine control, fuel injection control, machine/engine and other directions, can solve the problems of large speed fluctuation and long engine starting time, so as to reduce engine fluctuation and alleviate the long engine starting time. , the effect of improving fuel economy

Active Publication Date: 2022-01-21
ZHEJIANG GEELY NEW ENERGY COMML VEHICLES CO LTD +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of this, the object of the present invention is to provide a dual-fuel engine start-stop control method, device and vehicle, to alleviate the existing dual-fuel engine in the start-stop process, due to fuel switching caused by each engine start and stop. Technical problems of long starting time and large speed fluctuations

Method used

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  • Control method, device and vehicle for starting and stopping of dual-fuel engine
  • Control method, device and vehicle for starting and stopping of dual-fuel engine
  • Control method, device and vehicle for starting and stopping of dual-fuel engine

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Embodiment 1

[0032]The embodiment of the present invention provides a method for controlling the start and stop of a dual-fuel engine, which is applied to an electronic controller configured with a dual-fuel engine system, wherein the dual-fuel engine system includes a new fuel supply system and a traditional fuel supply system. Such as figure 1 A flow chart of a control method for starting and stopping a dual-fuel engine is shown, the method includes the following steps:

[0033] Step S102, when it is detected that the vehicle sends a shutdown signal to the engine, the current engine coolant temperature parameter and intake air temperature parameter are acquired.

[0034] Usually, when the electronic control unit (Electronic Control Unit, ECU) monitors that the vehicle sends a shutdown signal to the engine, the current vehicle coolant temperature parameter and intake air temperature parameter are obtained through the coolant temperature sensor and the intake air temperature sensor. The s...

Embodiment 2

[0051] On the basis of the above-mentioned embodiments, the embodiment of the present invention also provides a control device for starting and stopping a dual-fuel engine, which is applied to an electronic controller equipped with a dual-fuel engine system, wherein the above-mentioned dual-fuel engine system includes a new Fuel supply system and gasoline supply system, such as figure 2 A structural schematic diagram of a control device for starting and stopping a dual-fuel engine is shown, the device includes:

[0052] The obtaining module 202 is used to obtain the coolant temperature parameter and the intake air temperature parameter of the current vehicle when it is monitored that the vehicle sends a shutdown signal to the engine;

[0053] A calculation module 204, configured to calculate the current allowable shutdown time of the engine and the characteristic time of the engine according to the coolant temperature parameter and the intake air temperature parameter;

[00...

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Abstract

The invention provides a control method, device and vehicle for starting and stopping a dual-fuel engine, which relate to the technical field of automobiles. Air temperature parameters, and calculate the current engine allowable shutdown time and engine characteristic time of the engine; determine whether the engine allowable shutdown time is greater than the engine characteristic time; if so, trigger the engine shutdown through the new fuel supply system; after the engine shutdown, when the engine is allowed to start When information is sent, a control signal is sent to the new fuel supply system to trigger the new fuel supply system to provide power during the starting process of the engine. The control method, device and vehicle for starting and stopping the dual-fuel engine provided by the present invention reduce the engine fluctuation during the starting and stopping process of the vehicle, thereby improving the driver's driving comfort and experience, and at the same time, also contributing to energy saving and environmental protection. Improve fuel economy.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to a control method, device and vehicle for starting and stopping a dual-fuel engine. Background technique [0002] The engine start-stop system is the fastest-growing automobile energy-saving and environmental protection technology in the past few years. It is especially suitable for urban road conditions with frequent braking. Some studies have shown that this system can save fuel by 15% in urban road conditions. The parking system has gradually become the standard configuration of automobiles, especially widely used in single fuel (such as gasoline or diesel) engines. [0003] However, due to environmental pollution and the oil crisis, people are looking for clean energy that can replace gasoline as an alternative fuel for vehicle engines, such as methanol fuel. However, the biggest problem of the engine using methanol fuel is the difficulty of starting at low temperature. T...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D41/00F02D41/04F02D41/06F02D29/02
CPCF02D29/02F02D41/0025F02D41/042F02D41/062F02D2200/0414
Inventor 周晓雪王洋刘洪伟段召政
Owner ZHEJIANG GEELY NEW ENERGY COMML VEHICLES CO LTD
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