阅读说明：本技术 双燃料发动机切换的方法、装置及系统 (Method, device and system for switching dual-fuel engine ) 是由 曹石 秦涛 黄玉平 王飞飞 孙明峰 于 2019-09-30 设计创作，主要内容包括：本发明提供一种双燃料发动机切换的方法、装置及系统,该方法包括：若开关为置位状态,则检测所述开关处于置位状态时发动机的启动温度是否大于第一预设温度；若所述启动温度大于所述第一预设温度,则控制发动机按照第一燃料模式运行；若所述开关为复位状态,则将控制发动机从第一燃料模式切换为第二燃料模式。实现了发动机燃料模式的自由切换,既能满足车辆用户的切换需求,又能保证发动机的正常运行,从而提高车辆驾驶的安全性和可靠性。(The invention provides a method, a device and a system for switching a dual-fuel engine, wherein the method comprises the following steps: if the switch is in a set state, detecting whether the starting temperature of the engine is higher than a first preset temperature when the switch is in the set state; if the starting temperature is higher than the first preset temperature, controlling the engine to operate according to a first fuel mode; and if the switch is in a reset state, controlling the engine to be switched from the first fuel mode to the second fuel mode. The fuel mode of the engine can be freely switched, the switching requirement of a vehicle user can be met, the normal operation of the engine can be ensured, and therefore the safety and the reliability of vehicle driving are improved.)

1. A method of dual fuel engine switching, comprising:

if the switch is in a set state, detecting whether the starting temperature of the engine is higher than a first preset temperature when the switch is in the set state;

if the starting temperature is higher than the first preset temperature, controlling the engine to operate according to a first fuel mode;

and if the switch is in a reset state, controlling the engine to be switched from the first fuel mode to the second fuel mode.

2. The method of claim 1, further comprising:

if the switch is in a reset state, the residual quantity of the first fuel is less than a first preset residual quantity;

or the first fuel residual amount is smaller than the first preset residual amount;

the engine is controlled to switch from the first fuel mode to the second fuel mode.

3. The method of claim 1, further comprising:

and if the switch is not in a reset state and/or the first fuel residual quantity is not less than a first preset residual quantity, controlling the engine to keep the first fuel mode to operate.

4. The method of claim 1, further comprising:

if the switch is in a reset state, or the starting temperature of the engine is not greater than the first preset temperature when the switch is set; controlling the engine to operate in the second fuel mode.

5. The method of claim 4, further comprising:

if the switch is in the set state and/or the operating time of the second fuel mode is greater than a time threshold; the engine is controlled to switch from the second fuel mode to the first fuel mode.

6. The method of claim 5, further comprising:

and if the switch is not in the set state and/or the operation time of the second fuel mode is not greater than the time threshold, controlling the engine to keep operating in the second fuel mode.

7. The method of claim 2 or 3, further comprising:

and if the first fuel residual quantity is smaller than the first preset residual quantity, sending a reminding message to a user, and controlling the engine to be switched from a first fuel mode to a second fuel mode.

8. The method of claim 5 or 6, further comprising:

and if the running time of the second fuel mode is greater than the time threshold, sending a reminding message to a user, and controlling the engine to be switched from the second fuel mode to the first fuel mode.

9. A dual fuel engine switching apparatus, comprising:

the detection module is used for detecting whether the starting temperature of the engine is higher than a first preset temperature or not when the switch is in the set state if the switch is in the set state;

the control module is used for controlling the engine to operate according to a first fuel mode if the starting temperature is higher than the first preset temperature;

and the switching module is used for controlling the engine to be switched from the first fuel mode to the second fuel mode if the switch is in a reset state.

10. A system for dual fuel engine switching, comprising: the device comprises a memory and a processor, wherein the memory stores executable instructions of the processor; wherein the processor is configured to perform the method of dual fuel engine switching of any of claims 1-8 via execution of the executable instructions.

11. A computer readable storage medium having stored thereon a computer program, characterized in that the program, when executed by a processor, implements a method for dual fuel engine switching as claimed in any one of claims 1-8.

Technical Field

The invention relates to the technical field of vehicle fuel engines, in particular to a method, a device and a system for switching a dual-fuel engine.

Background

With the growing awareness of environmental protection, methanol, also known as methyl hydroxide, is the simplest saturated alcohol, and releases water and carbon dioxide after combustion, a well-known "clean fuel". The methanol has rich resources, good anti-knock property, higher octane value than gasoline, and 50 percent of oxygen content, and is beneficial to improving combustion, so the methanol is popular as a source of vehicle power energy.

Therefore, the engine alternative fuel (such as natural gas, liquefied petroleum gas, methanol, ethanol, biomass fuel, hydrogen, dimethyl ether and the like) is combined with the common fuel such as gasoline and diesel oil to simultaneously provide power energy for the vehicle engine, particularly the dual fuel combining the methanol fuel and the gasoline fuel, so that the emission pollution of the vehicle is greatly reduced, and the environmental protection property is improved.

However, the ignition concentration of methanol is relatively concentrated at low temperature and is limited by the saturated vapor pressure of methanol, the concentration of methanol vapor cannot reach the lowest ignition limit, and meanwhile, the vaporization latent heat of methanol is 7 times that of gasoline, so that the temperature of the methanol vapor is further reduced, and the pure methanol engine has the problems of difficult starting and the like at the temperature of below 10 ℃, so that even a dual-fuel engine combined with the gasoline has the condition of unreasonable use of two modes, and further causes the problems of energy waste, driving safety and the like.

Disclosure of Invention

The invention provides a method, a device and a system for switching a dual-fuel engine, which are used for realizing the free switching of the fuel mode of the engine, meeting the switching requirement of a vehicle user and ensuring the normal operation of the engine, thereby improving the safety and the reliability of vehicle driving.

In a first aspect, an embodiment of the present invention provides a method for switching a dual-fuel engine, including:

if the switch is in a set state, detecting whether the starting temperature of the engine is higher than a first preset temperature when the switch is in the set state;

if the starting temperature is higher than the first preset temperature, controlling the engine to operate according to a first fuel mode;

and if the switch is in a reset state, controlling the engine to be switched from the first fuel mode to the second fuel mode.

In one possible design, further comprising: if the switch is in a reset state, the residual quantity of the first fuel is less than the first preset residual quantity;

or the first fuel residual amount is smaller than the first preset residual amount;

the engine is controlled to switch from the first fuel mode to the second fuel mode.

In one possible design, further comprising: and if the switch is not in a reset state and/or the first fuel residual quantity is not less than the first preset residual quantity, controlling the engine to keep the first fuel mode to operate.

In one possible design, further comprising: if the switch is in a reset state, or the starting temperature of the engine is not greater than the first preset temperature when the switch is set; controlling the engine to operate in the second fuel mode.

In one possible design, further comprising: if the switch is in the set state and/or the operating time of the second fuel mode is greater than a time threshold; the engine is controlled to switch from the second fuel mode to the first fuel mode.

In one possible design, further comprising:

and if the switch is not in the set state and/or the operation time of the second fuel mode is not greater than the time threshold, controlling the engine to keep operating in the second fuel mode.

In one possible design, further comprising:

and if the first fuel residual quantity is smaller than a first preset residual quantity, sending a reminding message to a user, and controlling the engine to be switched from a first fuel mode to a second fuel mode.

In one possible design, further comprising: and if the running time of the second fuel mode is greater than the time threshold, sending a reminding message to a user, and controlling the engine to be switched from the second fuel mode to the first fuel mode.

In a second aspect, an embodiment of the present invention provides a device for switching a dual-fuel engine, including:

the detection module is used for detecting whether the starting temperature of the engine is higher than a first preset temperature or not when the switch is in the set state if the switch is in the set state;

the control module is used for controlling the engine to operate according to a first fuel mode if the starting temperature is higher than the first preset temperature;

and the switching module is used for controlling the engine to be switched from the first fuel mode to the second fuel mode if the switch is in a reset state.

In one possible design, further comprising: if the switch is in a reset state, the residual quantity of the first fuel is less than the first preset residual quantity;

or the first fuel residual amount is smaller than the first preset residual amount;

the engine is controlled to switch from the first fuel mode to the second fuel mode.

In one possible design, further comprising:

and if the switch is not in a reset state and/or the first fuel residual quantity is not less than the first preset residual quantity, controlling the engine to keep the first fuel mode to operate.

In one possible design, further comprising:

if the switch is in a reset state, or the starting temperature of the engine is not greater than the first preset temperature when the switch is set; controlling the engine to operate in the second fuel mode.

In one possible design, further comprising:

if the switch is in the set state and/or the operating time of the second fuel mode is greater than a time threshold; the engine is controlled to switch from the second fuel mode to the first fuel mode.

In one possible design, further comprising:

and if the switch is not in the set state and/or the operation time of the second fuel mode is not greater than the time threshold, controlling the engine to keep operating in the second fuel mode.

In one possible design, further comprising:

and if the first fuel residual quantity is smaller than a first preset residual quantity, sending a reminding message to a user, and controlling the engine to be switched from a first fuel mode to a second fuel mode.

In one possible design, further comprising:

and if the running time of the second fuel mode is greater than the time threshold, sending a reminding message to a user, and controlling the engine to be switched from the second fuel mode to the first fuel mode.

In a third aspect, an embodiment of the present invention provides a system for switching a dual-fuel engine, including: the device comprises a memory and a processor, wherein the memory stores executable instructions of the processor; wherein the processor is configured to perform the method of dual fuel engine switching of any of the first aspect via execution of the executable instructions.

In a fourth aspect, the present invention provides a computer-readable storage medium, on which a computer program is stored, where the program is executed by a processor to implement the method for switching the dual-fuel engine according to any one of the first aspect.

The invention provides a method, a device and a system for switching a dual-fuel engine, wherein the method comprises the following steps: if the switch is in a set state, detecting whether the starting temperature of the engine is higher than a first preset temperature when the switch is in the set state; if the starting temperature is higher than the first preset temperature, controlling the engine to operate according to a first fuel mode; and if the switch is in a reset state, controlling the engine to be switched from the first fuel mode to the second fuel mode. The fuel mode of the engine can be freely switched, the switching requirement of a vehicle user can be met, the normal operation of the engine can be ensured, and therefore the safety and the reliability of vehicle driving are improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a flow chart of a method for switching a dual fuel engine according to an embodiment of the present invention;

FIG. 2 is a flowchart of a method for switching a dual-fuel engine according to a second embodiment of the present invention;

FIG. 3 is a flowchart of a method for switching a dual-fuel engine according to a third embodiment of the present invention;

FIG. 4 is a schematic diagram of a reminding interface for switching the dual-fuel engine according to a third embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a dual-fuel engine switching device according to a fourth embodiment of the present invention;

fig. 6 is a schematic structural diagram of a system for switching a dual-fuel engine according to a fifth embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.