CN106762179B - Methanol engine cold start control system and method for vehicle - Google Patents
Methanol engine cold start control system and method for vehicle Download PDFInfo
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- CN106762179B CN106762179B CN201611249609.8A CN201611249609A CN106762179B CN 106762179 B CN106762179 B CN 106762179B CN 201611249609 A CN201611249609 A CN 201611249609A CN 106762179 B CN106762179 B CN 106762179B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/04—Introducing corrections for particular operating conditions
- F02D41/06—Introducing corrections for particular operating conditions for engine starting or warming up
- F02D41/062—Introducing corrections for particular operating conditions for engine starting or warming up for starting
- F02D41/064—Introducing corrections for particular operating conditions for engine starting or warming up for starting at cold start
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/04—Introducing corrections for particular operating conditions
- F02D41/06—Introducing corrections for particular operating conditions for engine starting or warming up
- F02D41/068—Introducing corrections for particular operating conditions for engine starting or warming up for warming-up
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M31/00—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture
- F02M31/02—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for heating
- F02M31/12—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for heating electrically
- F02M31/125—Fuel
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M31/00—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture
- F02M31/02—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for heating
- F02M31/12—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for heating electrically
- F02M31/13—Combustion air
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N19/00—Starting aids for combustion engines, not otherwise provided for
- F02N19/02—Aiding engine start by thermal means, e.g. using lighted wicks
- F02N19/04—Aiding engine start by thermal means, e.g. using lighted wicks by heating of fluids used in engines
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/023—Temperature of lubricating oil or working fluid
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/04—Engine intake system parameters
- F02D2200/0414—Air temperature
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/06—Fuel or fuel supply system parameters
- F02D2200/0606—Fuel temperature
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/50—Input parameters for engine control said parameters being related to the vehicle or its components
Abstract
The invention provides a methanol engine cold start control system for a vehicle, and belongs to the technical field of vehicle engine control. The system comprises: a first temperature sensor for detecting the temperature of air in the intake manifold; the second temperature sensor is used for detecting the temperature of the methanol fuel at the fuel rail injector assembly; a first heating element for heating air within the intake manifold; the second heating element is used for heating the methanol fuel at the fuel rail injector assembly; and a controller for selectively activating and deactivating the first heating element based on the air temperature and selectively activating and deactivating the second heating element based on the methanol fuel temperature. According to the scheme of the invention, when the environment temperature is suitable for the cold start of methanol, the system does not start heating, so that the energy can be saved. When the air temperature and the methanol fuel temperature meet the starting requirement, even if the engine is not started, the system can automatically stop heating, and further an air inlet manifold and an oil supply pipeline cannot be damaged.
Description
Technical Field
The invention relates to the technical field of vehicle engine control, in particular to a methanol engine cold start control system and method for a vehicle.
Background
Methanol has many advantages as a vehicle fuel, but the low-temperature start of the methanol vehicle is difficult due to the high ignition point of the methanol. In order to solve the problem of low-temperature starting of methanol fuel, a double-oil-rail technology is generally adopted at present, namely gasoline is used as starting fuel, and when the temperature of an engine reaches a certain degree, the engine is switched to the methanol fuel to work.
The double-oil rail technology has the defect that the two sets of oil rails have requirements on space arrangement, so that the optimal injection angle of the two sets of oil injectors cannot be considered, and the performance of fuel performance is influenced. To overcome the disadvantages of dual oil rails, the technology is currently being changed to single oil rail. The current single oil rail technology solves the problem of difficult methanol cold start from two directions: starting by adopting gasoline fuel in one direction, switching the fuel to methanol fuel by a control system when the temperature condition meets the requirement, wherein the gasoline and the methanol share one oil rail; the other direction is that methanol fuel is adopted in the starting stage and the normal working stage, and the air inlet temperature or the methanol fuel is heated in the starting stage so as to realize the normal cold starting of the methanol fuel.
Fig. 1 is a diagram of the operation of the prior art for a methanol fuel strategy during both start-up and normal operation. As shown in fig. 1, the working principle is as follows: the key is inserted into an ignition switch to be connected with a power supply of an automobile, a switch starting annunciator controls an electromagnetic relay to be connected with a power supply of a positive temperature effect electric heater through a controller to heat air entering an air inlet main pipe through an air filter and a throttle valve, hot air enters an air inlet manifold and is mixed with fuel oil sprayed by an oil sprayer, atomization and gasification of the fuel oil are improved, heating combustible mixed gas is formed, and cold starting of the automobile is achieved. When the water temperature sensor detects that the engine is warmed up and the cooling water temperature reaches 60 ℃, the electromagnetic relay is controlled by the controller to cut off the power of the positive temperature effect electric heater, the preheating starting process is completed, and the vehicle main control system works in a normal state.
Disclosure of Invention
The inventors have found that the solutions of the prior art have significant drawbacks and disadvantages, such as: 1) when the environment temperature meets the requirement of cold start, the engine still starts the positive temperature effect electric heater to heat the air, and the energy is wasted. 2) The time from the time when the key is inserted into the ignition switch to switch on the power supply to the time when the engine is started is too short, the time for the positive temperature effect electric heater to heat the air is too short, the heating is insufficient, and the successful cold start in the north with low air temperature is difficult. 3) The key is inserted into the ignition switch to be switched on, and the positive temperature effect electric heater immediately heats the air; after the key is inserted, if the driver does not start the engine for a long time, the positive temperature effect electric heater heats all the time, the air inlet manifold can be damaged, and the electric quantity of the automobile battery is consumed. 4) Only the air in the air inlet manifold is heated, and the methanol fuel is not heated, so that the mixed gas of the methanol and the air is not easy to burn.
It is an object of the present invention to provide a methanol engine cold start control system for a vehicle for heating control of methanol fuel and air while the methanol engine is in a start phase, the vehicle including an intake manifold and a rail injector assembly, the system comprising:
a first temperature sensor for detecting the temperature of air in the intake manifold;
a second temperature sensor for detecting a methanol fuel temperature at the fuel rail injector assembly;
a first heating element for heating air within the intake manifold;
a second heating element for heating the methanol fuel at the fuel rail injector assembly; and
a controller for selectively activating and deactivating the first heating element based on the air temperature and selectively activating and deactivating the second heating element based on the methanol fuel temperature.
Further, the controller is configured to turn on the first heating element when the air temperature is not greater than a first preset temperature and turn on the second heating element when the methanol fuel temperature is not greater than a second preset temperature.
Further, the system further comprises:
a coolant temperature sensor for acquiring a coolant temperature at the methanol engine;
wherein the controller is configured to deactivate the first heating element when the air temperature is above the first preset temperature, or when the coolant temperature is above a third preset temperature, and to deactivate the second heating element when the methanol fuel temperature is above the second preset temperature, or when the coolant temperature is above the third preset temperature.
Further, the system further comprises:
the door switch sensing device is used for detecting the opening and closing state of a door of the vehicle and sending a signal of the opening and closing state of the door to the controller, and the opening and closing state comprises an opening state and a closing state;
wherein the controller is configured to selectively activate and deactivate the first heating element based on the air temperature and selectively activate and deactivate the second heating element based on the methanol fuel temperature upon receiving a signal that the vehicle door is in an open state.
Further, when the first heating element and the second heating element are deactivated, the working state of the methanol engine enters a normal working stage from a starting stage.
Further, the system further comprises:
the first electromagnetic relay is connected with the first heating element at one end and the controller at the other end, and is used for receiving a control signal of the controller so as to selectively turn on and off the first heating element; and
and one end of the second electromagnetic relay is connected with the second heating element, and the other end of the second electromagnetic relay is connected with the controller and is used for receiving a control signal of the controller so as to selectively turn on and off the second heating element.
Further, the controller is configured to not turn on the first heating element if the air temperature is higher than the first preset temperature and not turn on the second heating element if the methanol fuel temperature is higher than a second preset temperature when the vehicle door is in the open state.
In particular, the invention provides a methanol engine cold start control method for a vehicle, which is used for heating control of methanol fuel and air when the methanol engine is in a starting stage, wherein the vehicle comprises an air inlet manifold and an oil rail injector assembly, and the method comprises the following steps:
detecting air temperature in the intake manifold and methanol fuel temperature at the fuel rail injector assembly;
heating or stopping heating of the air within the intake manifold as a function of the air temperature;
and heating the methanol fuel at the fuel rail injector assembly or stopping heating the methanol fuel according to the temperature of the methanol fuel.
Further, heating or stopping heating of the air in the intake manifold according to the air temperature includes the steps of:
heating air in the intake manifold when the air temperature is not higher than a first preset temperature;
when the air temperature is higher than the first preset temperature, the air is not heated or the heating of the air is stopped;
optionally, the heating of the air is stopped when the coolant temperature is higher than a third preset temperature.
Further, heating the methanol fuel at the fuel rail injector assembly or stopping heating the methanol fuel according to the methanol fuel temperature comprises the following steps:
when the temperature of the methanol fuel is not higher than a second preset temperature, heating the methanol fuel at the oil rail injector assembly;
when the temperature of the methanol fuel is higher than a second preset temperature, the methanol fuel is not heated or the heating of the methanol fuel is stopped.
According to the scheme of the invention, when the environment temperature is suitable for the methanol cold start, namely the air temperature and the methanol fuel temperature meet the start requirement, the system is not started to heat, so that the energy can be saved. Compared with the technical scheme that if the driver does not start the engine for a long time and the positive temperature effect electric heater heats the engine all the time in the prior art, the technical scheme of the invention has the advantages that when the air temperature in the air intake manifold and the methanol fuel temperature at the fuel rail injector assembly meet the starting requirement, the system automatically stops heating even if the engine is not started, and further the air intake manifold and the fuel supply pipeline cannot be damaged.
Compared with the scheme that only air is heated and methanol fuel is not heated in the prior art, the scheme provided by the invention can simultaneously heat the methanol fuel and the air, so that the fuel is more fully combusted. In addition, compared with the technical scheme that the air is heated in the time period from the time when the key is inserted into the ignition switch to switch on the power supply to the time when the engine is started in the prior art, the scheme of the invention heats the air when the door is opened, and the heating time is longer, so that the air is more sufficiently heated.
The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.
Drawings
Some specific embodiments of the invention will be described in detail hereinafter, by way of illustration and not limitation, with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the drawings:
FIG. 1 is a diagram of the operation of the prior art for a methanol fuel strategy during both start-up and normal operation;
FIG. 2 is a schematic block diagram of a methanol engine cold start control system for a vehicle according to one embodiment of the present invention;
FIG. 3 is a functional schematic diagram of a methanol engine cold start control system for a vehicle according to one embodiment of the present invention;
fig. 4 is a flowchart illustrating a methanol engine cold start control method for a vehicle according to an embodiment of the present invention.
Detailed Description
FIG. 2 shows a schematic block diagram of a methanol engine cold start control system 100 for a vehicle according to one embodiment of the present invention. Fig. 3 shows an operational schematic diagram of a methanol engine cold start control system 100 for a vehicle according to one embodiment of the present invention. The invention provides a methanol engine cold start control system 100 for a vehicle, wherein the system 100 is used for heating control of methanol fuel and air when a methanol engine is in a starting stage. The present invention employs a single rail technique and the system 100 may include a fuel storage tank, oil pump and rail injector assembly 230. During operation, the oil pump pumps methanol fuel from the fuel storage tank to the fuel rail injector assembly 230 to spray the atomized methanol fuel into the air intake and then deliver the atomized methanol fuel to the combustion chamber of the methanol engine. The system 100 may also include a throttle 220, an air filter 210, and an intake manifold 240, with air passing through the air filter 210 entering the intake manifold 240, mixing with methanol fuel, and entering the combustion chamber for combustion. As shown in fig. 2 and 3, the system 100 may further include a first temperature sensor 110, a second temperature sensor 120, a first heating element 130, a second heating element 140, and a controller 150 for intelligent heating of air and methanol. The first temperature sensor 110 is used to detect the temperature of air in the intake manifold 240. The second temperature sensor 120 is used to detect the methanol fuel temperature at the rail injector assembly 230. The first heating element 130 is used to heat air within the intake manifold 240. The second heating element 140 is used to heat the methanol fuel at the rail injector assembly 230. The controller 150 is configured to selectively activate and deactivate the first heating element 130 based on the air temperature and to selectively activate and deactivate the second heating element 140 based on the methanol fuel temperature.
In one embodiment, to enable intelligent activation and deactivation of the first heating element 130 and the second heating element 140, the controller 150 may be configured to activate the first heating element 130 when the air temperature is not greater than a first preset temperature, deactivate the first heating element 130 when the air temperature is greater than the first preset temperature; the second heating element 140 is turned on when the methanol fuel temperature is not higher than a second preset temperature, and the second heating element 140 is turned off when the methanol fuel temperature is higher than the second preset temperature.
In another embodiment, to enable intelligent activation and deactivation of the first and second heating elements 130, 140, the controller 150 may further include a coolant temperature sensor 160. Which is used to obtain the coolant temperature at the methanol engine. The controller 150 can be configured to turn on the first heating element 130 when the air temperature is not greater than a first predetermined temperature, and turn off the first heating element 130 when the coolant temperature is greater than a third predetermined temperature; the second heating element 140 is turned on when the methanol fuel temperature is not higher than a second predetermined temperature, and the second heating element 140 is turned off when the cooling liquid temperature is higher than the third predetermined temperature. Here, the first and second heating elements 130 and 140 may be heat-generating components capable of transferring heat generated by themselves to air and methanol, and may be, for example, positive temperature effect electric heaters.
According to the scheme of the invention, when the environment temperature is suitable for the methanol cold start, namely the air temperature and the methanol fuel temperature meet the start requirement, the system 100 does not start to heat, so that the energy can be saved. Compared with the technical scheme that if the driver does not start the engine for a long time and the positive temperature effect electric heater heats the engine all the time in the prior art, according to the technical scheme of the invention, when the air temperature in the air intake manifold 240 and the methanol fuel temperature at the oil rail injector assembly 230 meet the starting requirement, the system 100 can automatically stop heating even if the engine is not started, and further the air intake manifold 240 and the oil supply pipeline cannot be damaged. Compared with the scheme that only air is heated and methanol fuel is not heated in the prior art, the scheme provided by the invention can simultaneously heat the methanol fuel and the air, so that the fuel is more fully combusted.
In order to extend the heating time of the air or methanol fuel, the system 100 may further include a door opening and closing sensing device 170 for detecting an opening and closing state of a door of the vehicle, including an open state and a closed state, and transmitting a signal of the opening and closing state of the door to the controller 150. That is, the door switch sensing device 170 is used to sense whether the door is in an open state or a closed state. Controller 150 is configured to selectively activate and deactivate first heating element 130 based on air temperature and selectively activate and deactivate second heating element 140 based on methanol fuel temperature upon receiving a signal that the vehicle door is in an open state. When the first heating element 130 and the second heating element 140 are deactivated, the operating state of the methanol engine enters a normal operating stage from a starting stage. By "deactivated" it is meant that after the first heating element 140 is turned on, the first heating element 140 is turned off when the temperature of the air and methanol fuel meets the requirements for normal operation, i.e., the heating of the air and methanol fuel is stopped. The controller 150 is configured to not turn on the first heating element 130 if the air temperature is higher than a first preset temperature and not turn on the second heating element 140 if the methanol fuel temperature is higher than a second preset temperature when the door is in the open state. Thus, it is possible that neither the first heating element 130 nor the second heating element 140 is activated, where "not activated" means that the first heating element 130 and the second heating element 140 are not activated from the beginning, i.e. the air and methanol fuel do not need to be heated when the engine is in a start-up phase, and the first heating element 130 and the second heating element 140 do not need to be activated.
Compared with the technical scheme that the air is heated in the time period from the time when the key is inserted into the ignition switch to switch on the power supply to the time when the engine is started in the prior art, the scheme of the invention is that the air is heated when the door is opened, the heating time is longer, and the air is more sufficiently heated.
To enable automatic or rapid sensing of air temperature at intake manifold 240 and methanol fuel temperature at rail injector assembly 230, system 100 may further include a first electromagnetic relay 180 and a second electromagnetic relay 190. The first electromagnetic relay 180 has one end connected to the first heating element 130 and the other end connected to the controller 150, and is configured to receive a control signal from the controller 150 to selectively turn on and off the first heating element 130. The second electromagnetic relay 190 has one end connected to the second heating element 140 and the other end connected to the controller 150, and is configured to receive a control signal from the controller 150 to selectively turn on and off the second heating element 140.
Particularly, the invention also provides a methanol engine cold start control method for a vehicle, which is used for heating control of methanol fuel and air when the methanol engine is in a starting stage. The vehicle may include an intake manifold and rail injector assembly, the method comprising the steps of:
s100, detecting the air temperature in an air inlet manifold and the methanol fuel temperature at an oil rail injector assembly;
s200, heating air in the air inlet manifold or stopping heating the air according to the air temperature;
s300, heating the methanol fuel at the fuel rail injector assembly or stopping heating the methanol fuel according to the temperature of the methanol fuel.
In one embodiment, the step S200 may include the following steps:
s201, heating air in an air inlet manifold when the air temperature is not higher than a first preset temperature;
and S202, when the air temperature is higher than the first preset temperature, the air is not heated or the heating of the air is stopped.
In another embodiment, the step S200 may include the following steps:
s201, heating air in an air inlet manifold when the air temperature is not higher than a first preset temperature;
and S203, stopping heating the air when the temperature of the cooling liquid is higher than a third preset temperature.
The step S300 may include the steps of:
s301, heating the methanol fuel at the oil rail injector assembly when the temperature of the methanol fuel is not higher than a second preset temperature;
and S302, when the temperature of the methanol fuel is higher than a second preset temperature, the methanol fuel is not heated or the heating of the methanol fuel is stopped.
In another embodiment, the step S300 may include the following steps:
s301, heating the methanol fuel at the oil rail injector assembly when the temperature of the methanol fuel is not higher than a second preset temperature;
and S303, stopping heating the methanol fuel when the temperature of the cooling liquid is higher than a third preset temperature.
The method embodiment refers to the system embodiment, and features in the method and the system are mutually corresponding and are not described herein again.
The working principle of the methanol engine cold start control method for the vehicle is as follows: when a driver opens the vehicle door, the door switch sensing device sends a signal to the controller; the controller has the following working modes according to the signals detected by the first temperature sensor and the second temperature sensor:
1) when the air temperature detected by the first temperature sensor meets the starting requirement, and the fuel oil detected by the second temperature sensor also meets the starting requirement:
the controller does not send any signals to the first heating element and the second heating element. The driver enters the vehicle and starts the engine normally.
2) When the air temperature detected by the first temperature sensor meets the starting requirement and the fuel oil detected by the second temperature sensor does not meet the starting requirement:
the controller sends a signal to the second electromagnetic relay to start the second heating element to heat the methanol fuel at the fuel rail injector assembly.
The driver enters the vehicle, starts the engine and runs the engine. When the coolant temperature sensor detects that the temperature of engine coolant rises to 50 ℃, or the second temperature sensor detects that the temperature of fuel meets the starting requirement; the controller sends a signal to stop heating of the second heating element. The engine enters a normal working state.
3) When the air temperature detected by the first temperature sensor does not meet the starting requirement and the fuel oil detected by the second temperature sensor meets the starting requirement:
the controller sends a signal to the first electromagnetic relay to start the first heating element to heat the air in the air inlet manifold.
The driver enters the vehicle, starts the engine and runs the engine. When the coolant temperature sensor detects that the temperature of engine coolant rises to 50 ℃, or the first temperature sensor detects that air in the air inlet manifold meets the starting requirement; the controller sends a signal to stop heating of the first heating element. The engine enters a normal working state.
4) When the air temperature detected by the first temperature sensor does not meet the starting requirement, and the fuel oil detected by the second temperature sensor does not meet the starting requirement:
the controller sends signals to the first electromagnetic relay and the second electromagnetic relay to respectively start the first heating element and the second heating element to respectively heat air in the air inlet manifold and methanol fuel in the oil rail.
The driver enters the vehicle, starts the engine and runs the engine. When the coolant temperature sensor detects that the temperature of engine coolant rises to 50 ℃, or the first temperature sensor detects that air in an air inlet manifold meets the starting requirement, or the second temperature sensor detects that the temperature of fuel meets the starting requirement; the controller sends a signal to stop heating of the first heating element and the second heating element. The engine enters a normal working state.
Thus, it should be appreciated by those skilled in the art that while a number of exemplary embodiments of the invention have been illustrated and described in detail herein, many other variations or modifications consistent with the principles of the invention may be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the invention. Accordingly, the scope of the invention should be understood and interpreted to cover all such other variations or modifications.
Claims (6)
1. A methanol engine cold start control system for a vehicle for heating control of methanol fuel and air while the methanol engine is in a start-up phase, the vehicle including an intake manifold and a rail injector assembly, the system comprising:
a first temperature sensor for detecting the temperature of air in the intake manifold;
a second temperature sensor for detecting a methanol fuel temperature at the fuel rail injector assembly;
a first heating element for heating air within the intake manifold;
a second heating element for heating the methanol fuel at the fuel rail injector assembly; and
a controller for selectively activating and deactivating the first heating element based on the air temperature and selectively activating and deactivating the second heating element based on the methanol fuel temperature;
the system further comprises:
the door switch sensing device is used for detecting the opening and closing state of a door of the vehicle and sending a signal of the opening and closing state of the door to the controller, and the opening and closing state comprises an opening state and a closing state;
a coolant temperature sensor for acquiring a coolant temperature at the methanol engine;
wherein the controller is configured to selectively activate and deactivate the first heating element based on the air temperature and selectively activate and deactivate the second heating element based on the methanol fuel temperature upon receiving a signal that the vehicle door is in an open state, and the controller is configured to activate the first heating element when the air temperature is not greater than a first preset temperature, activate the second heating element when the methanol fuel temperature is not greater than a second preset temperature, deactivate the first heating element when the air temperature is greater than the first preset temperature, or deactivate the first heating element when the coolant temperature is greater than a third preset temperature, deactivate the second heating element when the methanol fuel temperature is greater than the second preset temperature, or deactivate the second heating element when the coolant temperature is greater than the third preset temperature.
2. The methanol engine cold start control system of claim 1, wherein the operating state of the methanol engine enters a normal operating phase from a start-up phase when the first heating element and the second heating element are deactivated.
3. The methanol engine cold start control system of claim 1, wherein the system further comprises:
the first electromagnetic relay is connected with the first heating element at one end and the controller at the other end, and is used for receiving a control signal of the controller so as to selectively turn on and off the first heating element; and
and one end of the second electromagnetic relay is connected with the second heating element, and the other end of the second electromagnetic relay is connected with the controller and is used for receiving a control signal of the controller so as to selectively turn on and off the second heating element.
4. The methanol engine cold start control system of claim 3, wherein the controller is configured to not turn on the first heating element if the air temperature is above the first preset temperature and not turn on the second heating element if the methanol fuel temperature is above a second preset temperature when the vehicle door is in an open state.
5. A methanol engine cold start control method for a vehicle including an intake manifold and a rail injector assembly for heating control of methanol fuel and air while the methanol engine is in a start phase, the method comprising the steps of:
detecting air temperature in the intake manifold and methanol fuel temperature at the fuel rail injector assembly;
heating or stopping heating of the air within the intake manifold as a function of the air temperature;
heating the methanol fuel at the fuel rail injector assembly or stopping heating the methanol fuel according to the temperature of the methanol fuel;
the method further comprises the steps of:
detecting an opening and closing state of a door of the vehicle, the opening and closing state including an open state and a closed state;
acquiring the temperature of coolant at the methanol engine through a coolant temperature sensor;
selectively activating and deactivating a first heating element for heating air within the intake manifold based on the air temperature and selectively activating and deactivating a second heating element for heating methanol fuel at the rail injector assembly based on the methanol fuel temperature; wherein the content of the first and second substances,
heating air in the intake manifold when the air temperature is not higher than a first preset temperature;
when the air temperature is higher than the first preset temperature, the air is not heated or the heating of the air is stopped;
and when the temperature of the cooling liquid is higher than a third preset temperature, stopping heating the air.
6. The methanol engine cold start control method of claim 5, wherein heating or stopping heating of the methanol fuel at the fuel rail injector assembly based on the methanol fuel temperature comprises:
when the temperature of the methanol fuel is not higher than a second preset temperature, heating the methanol fuel at the oil rail injector assembly;
when the temperature of the methanol fuel is higher than a second preset temperature, the methanol fuel is not heated or the heating of the methanol fuel is stopped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611249609.8A CN106762179B (en) | 2016-12-29 | 2016-12-29 | Methanol engine cold start control system and method for vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611249609.8A CN106762179B (en) | 2016-12-29 | 2016-12-29 | Methanol engine cold start control system and method for vehicle |
Publications (2)
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| CN111287845A (en) * | 2018-12-10 | 2020-06-16 | 杭州醇电科技有限公司 | Hydrogen energy range extender system adopting methanol fuel |
| CN110486150B (en) * | 2019-08-21 | 2020-10-27 | 贵州吉利发动机有限公司 | Methanol fuel engine driving system and hybrid vehicle |
| CN110821722B (en) * | 2019-11-22 | 2023-11-10 | 江苏大学 | Air inlet charge heating device of diesel/alcohol binary fuel engine and control method |
| CN114233540A (en) * | 2021-09-29 | 2022-03-25 | 潍柴动力股份有限公司 | Cold-start air inlet pipe device of methanol engine and control method thereof |
| CN114233494B (en) * | 2021-09-29 | 2023-07-11 | 太原理工大学 | Cold starting device and method for methanol engine |
| CN114483408A (en) * | 2022-02-23 | 2022-05-13 | 闳臻智能科技(上海)有限公司 | Starting system for methanol engine |
| CN114738149A (en) * | 2022-04-24 | 2022-07-12 | 潍柴动力股份有限公司 | Methanol fuel engine air inlet structure and control method thereof |
| CN114738147B (en) * | 2022-05-09 | 2023-04-18 | 潍柴动力股份有限公司 | Engine air inlet temperature control method and device |
| CN116291930B (en) * | 2023-05-22 | 2023-08-18 | 潍柴动力股份有限公司 | Cold start method, device, equipment and system for methanol engine |
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