CN113586297A - Fuel electronic reversing valve switching method and device - Google Patents

Fuel electronic reversing valve switching method and device Download PDF

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Publication number
CN113586297A
CN113586297A CN202110872933.XA CN202110872933A CN113586297A CN 113586297 A CN113586297 A CN 113586297A CN 202110872933 A CN202110872933 A CN 202110872933A CN 113586297 A CN113586297 A CN 113586297A
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China
Prior art keywords
fuel
fuel tank
electronic
reversing valve
tank
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CN202110872933.XA
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Chinese (zh)
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CN113586297B (en
Inventor
张倩
路志强
黄少文
高发廷
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China National Heavy Duty Truck Group Jinan Power Co Ltd
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China National Heavy Duty Truck Group Jinan Power Co Ltd
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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
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/0012—Valves
    • F02M63/0014—Valves characterised by the valve actuating means
    • F02M63/0015—Valves characterised by the valve actuating means electrical, e.g. using solenoid
    • 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
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/0011—Constructional details; Manufacturing or assembly of elements of fuel systems; Materials therefor
    • F02M37/0023—Valves in the fuel supply and return system
    • 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
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/0076—Details of the fuel feeding system related to the fuel tank
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
    • F16K37/0075—For recording or indicating the functioning of a valve in combination with test equipment

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)

Abstract

The application discloses a method and a device for switching a fuel electronic reversing valve, wherein the method comprises the following steps: acquiring the size of a fuel tank and a capacitance type fuel liquid level signal, and determining the actual fuel liquid level of the fuel tank; acquiring a self-reset change-over switch processing signal of a main oil tank and an auxiliary oil tank, and determining the actual switch state of the oil tanks; judging whether the actual fuel level and the actual switch state of the fuel tank meet the following conditions: the actual fuel liquid level of the main and auxiliary fuel tanks exceeds a set fuel tank liquid level threshold value, and/or a main and auxiliary fuel tank change-over switch signal is received according to the environmental temperature and the engine speed; if yes, controlling the fuel electronic reversing valve to reverse; otherwise, the electronic fuel reversing valve does not reverse. The system comprises: the system comprises a main oil tank capacitive fuel level sensor, an auxiliary oil tank capacitive fuel level sensor, a main and auxiliary oil tank self-resetting selector switch, a fuel electronic reversing valve, a chassis domain controller and an SAM controller. Through the application, the accuracy of the fuel supply control of the whole vehicle can be effectively improved.

Description

Fuel electronic reversing valve switching method and device
Technical Field
The application relates to the technical field of electronic control of commercial vehicle chassis, in particular to a method and a device for switching a fuel electronic reversing valve.
Background
Fuel is an important power and energy source for commercial vehicles. In the commercial vehicle, because commercial vehicle loading capacity is big, the journey is long in the driving, and operating time is of a specified duration, if the unable in time supply of fuel in the driving process, not only influence the dynamic nature of whole car, still can directly threaten driver's safety, this fuel supply that just needs control commercial vehicle, also is exactly to fuel electronic reversing valve control. Therefore, how to control the electronic fuel reversing valve of the commercial vehicle is an important technical problem.
At present, the method for controlling the electronic fuel reversing valve of the commercial vehicle is mainly manually controlled. Specifically, by operating a switch on an instrument panel by a driver, when the oil level of a certain oil tank is too low, the driver needs to press a reversing valve switch in time, so that the fuel is supplied in time.
However, in the existing method for controlling the fuel electronic reversing valve of the commercial vehicle, because a manual control method is adopted, the possibility that the reversing valve switch is not pressed down in time exists, and when the possibility exists, fuel supply is not in time easily caused, so that the condition that the whole vehicle cannot run due to insufficient fuel is caused. Therefore, the control accuracy of the fuel supply of the whole vehicle is not high enough by the conventional method for controlling the fuel electronic reversing valve of the commercial vehicle.
Disclosure of Invention
The application provides a fuel electronic reversing valve switching method and device, and aims to solve the problem that the control accuracy of fuel supply of a whole vehicle is not high enough by a commercial vehicle fuel electronic reversing valve method in the prior art.
In order to solve the technical problem, the embodiment of the application discloses the following technical scheme:
a fuel electronic reversing valve switching method comprises the following working method:
acquiring the size of a fuel tank;
acquiring a capacitance type fuel liquid level signal, and determining the actual fuel liquid level of the fuel tank by combining the size of the fuel tank;
acquiring a self-reset selector switch processing signal of a main oil tank and an auxiliary oil tank, and determining the actual switching state of the oil tank according to the self-reset selector switch processing signal of the main oil tank and the auxiliary oil tank;
judging whether the actual fuel level and the actual switch state of the fuel tank meet the following conditions: the actual fuel liquid level of the main and auxiliary fuel tanks exceeds a set fuel tank liquid level threshold value, and/or a main and auxiliary fuel tank change-over switch signal is received according to the environmental temperature and the engine speed;
if the conditions are met, controlling the fuel electronic reversing valve to reverse by setting a flag bit of the fuel electronic reversing valve according to the actual fuel liquid level and the actual switch state of the fuel tank;
if the condition is not met, the electronic fuel reversing valve does not reverse.
Optionally, the obtaining the fuel tank size comprises:
respectively defining the length, width and height calibration quantity of the fuel tank;
respectively writing the actual length, width and height values of the current fuel tank into corresponding calibration quantities of the length, width and height of the fuel tank;
the actual length, width and height values written into the calibration quantities are cured.
Optionally, the actual fuel level of the main and auxiliary fuel tanks exceeds a set tank level threshold, specifically:
the actual fuel liquid level of the main fuel tank is less than or equal to the set main fuel tank liquid level minimum threshold, and the actual fuel liquid level of the auxiliary fuel tank is greater than or equal to the set auxiliary fuel tank liquid level maximum threshold; or,
the actual fuel liquid level of the auxiliary fuel tank is less than or equal to the set minimum threshold of the liquid level of the auxiliary fuel tank, and the actual fuel liquid level of the main fuel tank is greater than or equal to the set maximum threshold of the liquid level of the main fuel tank.
Optionally, the receiving a main-auxiliary oil tank change-over switch signal according to the ambient temperature and the engine speed includes:
the ambient temperature is less than or equal to a set ambient temperature threshold;
the rotating speed of the engine is less than or equal to a set rotating speed threshold value in the running state; and is
And receiving a main and auxiliary oil tank change-over switch signal.
Optionally, the controlling the fuel electronic directional valve to change direction by setting a flag of the fuel electronic directional valve according to the actual fuel level of the fuel tank includes:
when the state of the D end of the marker bit of the electronic fuel reversing valve is defined to be 1 and the state of the E end of the electronic fuel reversing valve is defined to be 0, the main fuel tank is in a working state, and when the state of the D end of the marker bit of the electronic fuel reversing valve is defined to be 0 and the state of the E end of the electronic fuel reversing valve is defined to be 1, the auxiliary fuel tank is in a working state;
when the actual fuel liquid level of the main fuel tank is less than or equal to the set main fuel tank liquid level minimum threshold and the actual fuel liquid level of the auxiliary fuel tank is greater than or equal to the set auxiliary fuel tank liquid level maximum threshold, the state of the D end of the flag bit of the fuel electronic reversing valve is controlled to be updated from 1 to 0, and the state of the E end of the flag bit of the fuel electronic reversing valve is controlled to be updated from 0 to 1;
the fuel electronic reversing valve is switched from a main fuel tank to an auxiliary fuel tank;
when the actual fuel liquid level of the auxiliary fuel tank is less than or equal to the set minimum liquid level threshold of the auxiliary fuel tank and the actual fuel liquid level of the main fuel tank is greater than or equal to the set maximum liquid level threshold of the main fuel tank, the state of the D end of the flag bit of the fuel electronic reversing valve is controlled to be updated from 0 to 1, and the state of the E end of the flag bit of the fuel electronic reversing valve is controlled to be updated from 1 to 0;
the electronic fuel reversing valve is switched from the auxiliary fuel tank to the main fuel tank.
Optionally, the controlling the fuel electronic directional valve to change direction by setting a flag bit of the fuel electronic directional valve according to the actual on-off state of the fuel tank includes:
when the state of the D end of the marker bit of the electronic fuel reversing valve is defined to be 1 and the state of the E end of the electronic fuel reversing valve is defined to be 0, the main fuel tank is in a working state, and when the state of the D end of the marker bit of the electronic fuel reversing valve is defined to be 0 and the state of the E end of the electronic fuel reversing valve is defined to be 1, the auxiliary fuel tank is in a working state;
when the environment temperature is less than or equal to a set environment temperature threshold value, the engine rotating speed is less than or equal to a set operating state rotating speed threshold value, and a main oil tank and auxiliary oil tank switching switch signal is received, acquiring a mark bit of a current fuel electronic reversing valve;
if the current state of the D end of the marker bit of the electronic fuel reversing valve is 1 and the state of the E end of the electronic fuel reversing valve is 0, updating the state of the D end of the marker bit of the electronic fuel reversing valve from 1 to 0 and updating the state of the E end from 0 to 1;
the fuel electronic reversing valve is switched from a main fuel tank to an auxiliary fuel tank;
if the current state of the D end of the marker bit of the electronic fuel reversing valve is 0 and the state of the E end of the electronic fuel reversing valve is 1, updating the state of the D end of the marker bit of the electronic fuel reversing valve from 0 to 1 and updating the state of the E end from 1 to 0;
the electronic fuel reversing valve is switched from the auxiliary fuel tank to the main fuel tank.
Optionally, after acquiring a capacitive fuel level signal and determining an actual fuel level of the fuel tank in combination with the fuel tank size, the method further comprises:
and displaying the actual fuel level of the fuel tank.
An electronic fuel oil selector valve apparatus, comprising: the capacitive fuel level sensor of the main fuel tank and the capacitive fuel level sensor of the auxiliary fuel tank are respectively connected with the input end of the chassis domain controller through an internal communication CAN, the input end of the SAM controller is connected with the self-resetting selector switch of the main and auxiliary fuel tanks, the output end of the SAM controller is connected with the input end of the chassis domain controller through an external communication CAN, and the output end of the chassis domain controller is connected with the fuel electronic selector valve.
Optionally, the apparatus further comprises an instrument panel, and an output end of the chassis domain controller is connected with the instrument panel through an external communication CAN.
Optionally, the chassis domain controller comprises:
the parameter acquisition unit is used for acquiring the size of a fuel tank, a capacitive fuel liquid level signal and a main and auxiliary fuel tank self-reset selector switch processing signal;
the parameter processing unit is used for determining the actual fuel liquid level of the fuel tank according to the capacitance type fuel liquid level signal and the size of the fuel tank, and determining the actual on-off state of the fuel tank according to the self-reset change-over switch processing signal of the main fuel tank and the auxiliary fuel tank;
and the judgment unit is used for judging whether the actual fuel liquid level and the actual switch state of the oil tank meet the following conditions: the actual fuel liquid level of the main and auxiliary fuel tanks exceeds a set fuel tank liquid level threshold value, and/or a main and auxiliary fuel tank change-over switch signal is received according to the environmental temperature and the engine speed;
a control unit for controlling the fuel electronic reversing valve to reverse by setting the flag bit of the fuel electronic reversing valve according to the actual fuel liquid level and the actual switch state of the fuel tank when the condition of the judging unit is met, and controlling the fuel electronic reversing valve not to reverse when the condition of the judging unit is not met
The technical scheme provided by the embodiment of the application can have the following beneficial effects:
the application provides a fuel electronic directional valve switching method, which comprises the steps of firstly obtaining the size of a fuel tank, obtaining a capacitance type fuel liquid level signal, and determining the actual fuel liquid level of the fuel tank by combining the size of the fuel tank; and secondly, acquiring a self-reset change-over switch processing signal of the main oil tank and the auxiliary oil tank, determining the actual switching state of the oil tank according to the signal, judging whether the actual fuel liquid level and the actual switching state of the oil tank meet at least one of two set conditions, if so, controlling the reversing of the fuel electronic reversing valve by setting a flag bit of the fuel electronic reversing valve, otherwise, not reversing the fuel electronic reversing valve. Compared with the prior art, the method adopts an automatic method, determines the actual fuel liquid level and the actual switch state according to the acquired fuel tank size, the capacitance type fuel liquid level signal and the main and auxiliary fuel tank self-reset change-over switch processing signal, performs corresponding judgment, and finally realizes automatic control of the fuel electronic reversing valve.
The application also provides a fuel electronic directional control valve auto-change over device, and the device mainly includes: the system comprises a main oil tank capacitive fuel level sensor, an auxiliary oil tank capacitive fuel level sensor, a main and auxiliary oil tank self-resetting selector switch, a fuel electronic reversing valve, a chassis domain controller and an SAM controller. The capacitive fuel level signal is acquired by a main fuel tank capacitive fuel level sensor and an auxiliary fuel tank capacitive fuel level sensor and is transmitted to a chassis domain controller, and the chassis domain controller combines the signal with the actual fuel tank size to acquire the fuel level of a fuel tank; acquiring a self-resetting change-over switch signal of the main and auxiliary oil tanks through a self-resetting change-over switch of the main and auxiliary oil tanks, transmitting the signal to a chassis domain controller through an SAM (sample access controller), and acquiring an actual switch state of the oil tank after the signal is analyzed by the chassis domain controller; and finally, determining the switching action of the fuel electronic reversing valve through a chassis domain controller according to the fuel liquid level and the actual switching state of the fuel tank, and realizing the automatic control of the fuel electronic reversing valve. The device has the advantages that due to the structural design, the situation that the manual control of the fuel electronic reversing valve causes untimely switching can be avoided, the control accuracy of fuel supply of the whole vehicle is improved, and the control efficiency of the fuel electronic reversing valve is improved.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application.
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic flow chart of a method for switching an electronic fuel reversing valve according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of a switching device of an electronic fuel reversing valve according to an embodiment of the present disclosure.
Detailed Description
In order to make those skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. 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 application.
For a better understanding of the present application, embodiments of the present application are explained in detail below with reference to the accompanying drawings.
Example one
Referring to fig. 1, fig. 1 is a schematic flow chart of a method for switching an electronic fuel reversing valve according to an embodiment of the present disclosure. As can be seen from fig. 1, the switching method of the electronic fuel reversing valve in the embodiment mainly includes the following steps:
s1: fuel tank dimensions are obtained.
Specifically, step S1 includes the following processes:
s11: the calibration quantities of the length, width and height of the fuel tank are respectively defined.
S12: and writing the values of the actual length, the width and the height of the current fuel tank into corresponding calibration quantities of the length, the width and the height of the fuel tank respectively.
S13: the actual length, width and height values written into the calibration quantities are cured.
In the field of commercial vehicles, a chassis domain controller of a commercial vehicle engine can be adopted to control relevant parameters. Specifically, the control method may be written in software. From the above steps S11-S12, after defining the length calibration quantity, the width calibration quantity and the height calibration quantity of the fuel tank, according to the actual size of the fuel tank for loading, writing the actual length, width and height values of the current fuel tank into the corresponding calibration quantities, and finally performing data solidification on the written values, thereby providing parameter basis for the subsequent fuel electronic directional valve switching method.
S2: and acquiring a capacitance type fuel liquid level signal, and determining the actual fuel liquid level of the fuel tank by combining the size of the fuel tank.
Specifically, step S2 includes the following processes:
s21: generating real-time liquid level information of the fuel tank in a capacitance type fuel liquid level signal mode according to the size of the fuel tank;
s22: and analyzing the real-time liquid level information to obtain the actual fuel liquid level of the fuel tank.
The capacitive fuel level signal in the embodiment can be acquired by a capacitive fuel level signal sensor. The capacitive fuel level signal sensor comprises: the capacitive fuel level signal sensor of the main fuel tank and the capacitive fuel level signal sensor of the auxiliary fuel tank. According to the size of the fuel tank, the capacitance type fuel liquid level signal sensor CAN send real-time liquid level information of the fuel tank to the chassis domain controller through the internal communication CAN, and the chassis domain controller analyzes the ID message after acquiring the ID message related to the real-time liquid level information of the fuel tank to acquire the actual fuel liquid level of the fuel tank.
Further, after acquiring the capacitive fuel level signal and determining the actual fuel level of the fuel tank according to the size of the fuel tank, the present embodiment further includes step S7: and displaying the actual fuel level of the fuel tank.
The actual fuel level may be displayed by an instrument panel. Specifically, the chassis domain controller sends the acquired fuel level to the instrument panel through the external communication CAN, and the instrument panel analyzes and displays the received fuel level ID message. The mode is more intuitive, and is beneficial to a driver to conveniently obtain the fuel liquid level information, so that the switching accuracy of the fuel electronic reversing valve is improved.
S3: and acquiring a self-reset change-over switch processing signal of the main and auxiliary oil tanks, and determining the actual on-off state of the oil tank according to the self-reset change-over switch processing signal of the main and auxiliary oil tanks.
In the field of commercial vehicles, normally, a main and auxiliary fuel tank self-resetting change-over switch processing signal operated by a driver is received by an SAM controller in a cab, the SAM controller sends a switch state ID message to a chassis domain controller through an external communication CAN according to the main and auxiliary fuel tank self-resetting change-over switch processing signal, and the chassis domain controller analyzes the switch state ID message to obtain the actual switch state of a fuel tank.
S4: judging whether the actual fuel level and the actual switch state of the fuel tank meet the following conditions: the actual fuel level of the main and auxiliary fuel tanks exceeds a set fuel tank liquid level threshold value, and/or a main and auxiliary fuel tank change-over switch signal is received according to the environment temperature and the engine speed.
That is, if the actual fuel level of the tank is satisfied: the actual fuel liquid level of the main and auxiliary fuel tanks exceeds the set fuel tank liquid level threshold value, and step S5 is executed; if the actual switch state is satisfied: receiving a main and auxiliary oil tank change-over switch signal according to the environmental temperature and the engine speed, and executing step S5; if the actual fuel level of the fuel tank meets the following conditions: the actual fuel liquid level of main and auxiliary fuel tank surpasses the oil tank liquid level threshold value of settlement, and, the actual on-off state satisfies: step S5 is also executed upon receiving the main-auxiliary tank switching signal in accordance with the ambient temperature and the engine speed.
Specifically, the actual fuel level of the main and auxiliary fuel tanks exceeds a set tank level threshold, specifically one of the following two conditions:
1) the actual fuel liquid level of the main fuel tank is less than or equal to the set main fuel tank liquid level minimum threshold, and the actual fuel liquid level of the auxiliary fuel tank is greater than or equal to the set auxiliary fuel tank liquid level maximum threshold.
2) The actual fuel liquid level of the auxiliary fuel tank is less than or equal to the set minimum threshold of the liquid level of the auxiliary fuel tank, and the actual fuel liquid level of the main fuel tank is greater than or equal to the set maximum threshold of the liquid level of the main fuel tank.
That is, if the actual fuel level of the main-sub tank satisfies the condition of 1), or the condition of 2), step S5 is performed.
Receiving a main and auxiliary oil tank change-over switch signal according to the environment temperature and the engine speed, comprising:
the ambient temperature is less than or equal to a set ambient temperature threshold; the rotating speed of the engine is less than or equal to a set rotating speed threshold value in the running state; and receives the main and auxiliary oil tank change-over switch signal. That is, if the actual switch state simultaneously satisfies the three conditions of the ambient temperature being less than or equal to the set ambient temperature threshold, the engine speed being less than or equal to the set operating state speed threshold, and the main-sub tank switch signal being received, step S5 is executed.
With continued reference to fig. 1, if the above determination condition is satisfied, step S5 is executed: and controlling the fuel electronic reversing valve to reverse by setting a zone bit of the fuel electronic reversing valve according to the actual fuel liquid level and the actual switch state of the fuel tank. If the above judgment condition is not satisfied, step S6 is executed: the electronic fuel reversing valve does not reverse.
And after the chassis controller detects that the conditions are met, the electronic reversing valve is controlled to reverse, a logic counter can be designed in the chassis domain controller, and the fuel electronic reversing valve keeps the last state unchanged before the next switching condition is not received. If the counter is not designed in the chassis area controller, the fuel electronic reversing valve is switched back immediately after meeting the condition switching.
Specifically, step S5 is divided into different cases according to the actual fuel level judgment condition and the actual switch state judgment condition of the fuel tank.
In the first case: according to the actual fuel liquid level of oil tank, through the flag bit that sets up fuel electronic reversing valve, control fuel electronic reversing valve switching-over includes:
s501: when the D end state of the marker bit of the fuel electronic reversing valve is defined to be 1 and the E end state is defined to be 0, the main oil tank is in a working state, and when the D end state of the marker bit of the fuel electronic reversing valve is defined to be 0 and the E end state is defined to be 1, the auxiliary oil tank is in a working state.
S502: and when the actual fuel liquid level of the main fuel tank is less than or equal to the set main fuel tank liquid level minimum threshold and the actual fuel liquid level of the auxiliary fuel tank is greater than or equal to the set auxiliary fuel tank liquid level maximum threshold, the state of the D end of the marker bit of the fuel electronic reversing valve is controlled to be updated from 1 to 0, and the state of the E end of the marker bit of the fuel electronic reversing valve is controlled to be updated from 0 to 1.
S503: the fuel electronic reversing valve is switched from the main fuel tank to the auxiliary fuel tank.
S504: and when the actual fuel liquid level of the auxiliary fuel tank is less than or equal to the set minimum liquid level threshold of the auxiliary fuel tank and the actual fuel liquid level of the main fuel tank is greater than or equal to the set maximum liquid level threshold of the main fuel tank, the state of the D end of the marker bit of the fuel electronic reversing valve is controlled to be updated from 0 to 1, and the state of the E end of the marker bit of the fuel electronic reversing valve is controlled to be updated from 1 to 0.
S505: the electronic fuel reversing valve is switched from the auxiliary fuel tank to the main fuel tank.
In the second case: according to the actual on-off state of oil tank, through the flag bit that sets up fuel electronic reversing valve, control fuel electronic reversing valve switching-over includes:
s511: when the D end state of the marker bit of the fuel electronic reversing valve is defined to be 1 and the E end state is defined to be 0, the main oil tank is in a working state, and when the D end state of the marker bit of the fuel electronic reversing valve is defined to be 0 and the E end state is defined to be 1, the auxiliary oil tank is in a working state.
S512: and when the ambient temperature is less than or equal to a set ambient temperature threshold value, the engine rotating speed is less than or equal to a set operating state rotating speed threshold value, and a main oil tank and auxiliary oil tank switching switch signal is received, acquiring the current marker bit of the electronic fuel oil reversing valve.
S513: and if the D end state of the marker bit of the current fuel electronic reversing valve is 1 and the E end state is 0, updating the D end state of the marker bit of the fuel electronic reversing valve from 1 to 0 and updating the E end state from 0 to 1.
S514: the fuel electronic reversing valve is switched from the main fuel tank to the auxiliary fuel tank.
S515: and if the D end state of the marker bit of the current fuel electronic reversing valve is 0 and the E end state is 1, updating the D end state of the marker bit of the fuel electronic reversing valve from 0 to 1, and updating the E end state from 1 to 0.
S516: the electronic fuel reversing valve is switched from the auxiliary fuel tank to the main fuel tank.
In the second case, when the ambient temperature is less than or equal to the set ambient temperature threshold, the engine speed is less than or equal to the set operating state speed threshold, and the main and auxiliary fuel tank switch signal is received, the currently used fuel tank is switched to another fuel tank, that is: if the main oil tank is used currently, switching to the auxiliary oil tank; if the auxiliary fuel tank is currently used, the main fuel tank is switched to.
Example two
Referring to fig. 2 on the basis of the embodiment shown in fig. 1, fig. 2 is a schematic structural diagram of a switching device of an electronic fuel reversing valve according to an embodiment of the present application. As can be seen from fig. 2, the switching device of the electronic fuel reversing valve in the present embodiment mainly includes: the capacitive fuel level sensor of the main fuel tank, the capacitive fuel level sensor of the auxiliary fuel tank, the self-reset selector switch of the main fuel tank and the auxiliary fuel tank, a fuel electronic reversing valve, a chassis domain controller and an SAM controller, wherein the capacitive fuel level sensor of the main fuel tank and the capacitive fuel level sensor of the auxiliary fuel tank are respectively connected with the input end of the chassis domain controller through an internal communication CAN, the input end of the SAM controller is connected with the self-reset selector switch of the main fuel tank and the auxiliary fuel tank, the output end of the SAM controller is connected with the input end of the chassis domain controller through an external communication CAN, and the output end of the chassis domain controller is connected with the fuel electronic reversing valve.
Further, the fuel electronic direction valve switching device of the embodiment further comprises: the output end of the chassis domain controller is connected with the instrument panel through an external communication CAN. The fuel level of the fuel tank can be visually displayed through the instrument panel.
Further, the chassis domain controller in this embodiment includes: the device comprises a parameter acquisition unit, a parameter processing unit, a judgment unit and a control unit. The device comprises a parameter acquisition unit, a parameter acquisition unit and a control unit, wherein the parameter acquisition unit is used for acquiring the size of a fuel tank, a capacitive fuel liquid level signal and a main and auxiliary fuel tank self-resetting change-over switch processing signal; the parameter processing unit is used for determining the actual fuel level of the fuel tank according to the capacitance type fuel level signal and the size of the fuel tank, and determining the actual on-off state of the fuel tank according to the self-reset change-over switch processing signal of the main fuel tank and the auxiliary fuel tank; and the judgment unit is used for judging whether the actual fuel liquid level and the actual switch state of the oil tank meet the following conditions: the actual fuel liquid level of the main and auxiliary fuel tanks exceeds a set fuel tank liquid level threshold value, and/or a main and auxiliary fuel tank change-over switch signal is received according to the environmental temperature and the engine speed; and the control unit is used for controlling the fuel electronic reversing valve to reverse according to the actual fuel liquid level and the actual switching state of the fuel tank by setting the zone bit of the fuel electronic reversing valve when the condition of the judging unit is met, and controlling the fuel electronic reversing valve not to reverse when the condition of the judging unit is not met.
The working principle and the working method of the switching device of the electronic fuel reversing valve in the embodiment are explained in detail in the embodiment shown in fig. 1, and the two embodiments can be referred to each other and are not described again.
The above description is merely exemplary of the present application and is presented to enable those skilled in the art to understand and practice the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. A fuel electronic reversing valve switching method is characterized in that the working method comprises the following steps:
acquiring the size of a fuel tank;
acquiring a capacitance type fuel liquid level signal, and determining the actual fuel liquid level of the fuel tank by combining the size of the fuel tank;
acquiring a self-reset selector switch processing signal of a main oil tank and an auxiliary oil tank, and determining the actual switching state of the oil tank according to the self-reset selector switch processing signal of the main oil tank and the auxiliary oil tank;
judging whether the actual fuel level and the actual switch state of the fuel tank meet the following conditions: the actual fuel liquid level of the main and auxiliary fuel tanks exceeds a set fuel tank liquid level threshold value, and/or a main and auxiliary fuel tank change-over switch signal is received according to the environmental temperature and the engine speed;
if the conditions are met, controlling the fuel electronic reversing valve to reverse by setting a flag bit of the fuel electronic reversing valve according to the actual fuel liquid level and the actual switch state of the fuel tank;
if the condition is not met, the electronic fuel reversing valve does not reverse.
2. A fuel electronic directional valve switching method as set forth in claim 1, wherein said obtaining a fuel tank size includes:
respectively defining the length, width and height calibration quantity of the fuel tank;
respectively writing the actual length, width and height values of the current fuel tank into corresponding calibration quantities of the length, width and height of the fuel tank;
the actual length, width and height values written into the calibration quantities are cured.
3. The switching method of the electronic fuel reversing valve according to claim 1, characterized in that the actual fuel level of the main and auxiliary fuel tanks exceeds a set tank level threshold, specifically:
the actual fuel liquid level of the main fuel tank is less than or equal to the set main fuel tank liquid level minimum threshold, and the actual fuel liquid level of the auxiliary fuel tank is greater than or equal to the set auxiliary fuel tank liquid level maximum threshold; or,
the actual fuel liquid level of the auxiliary fuel tank is less than or equal to the set minimum threshold of the liquid level of the auxiliary fuel tank, and the actual fuel liquid level of the main fuel tank is greater than or equal to the set maximum threshold of the liquid level of the main fuel tank.
4. The electronic fuel oil reversing valve switching method according to claim 1, wherein receiving a main and auxiliary fuel tank switching signal according to the ambient temperature and the engine speed comprises:
the ambient temperature is less than or equal to a set ambient temperature threshold;
the rotating speed of the engine is less than or equal to a set rotating speed threshold value in the running state; and is
And receiving a main and auxiliary oil tank change-over switch signal.
5. The switching method of the electronic fuel reversing valve according to claim 3, wherein the step of controlling the electronic fuel reversing valve to reverse according to the actual fuel level of the fuel tank by setting a flag bit of the electronic fuel reversing valve comprises the following steps:
when the state of the D end of the marker bit of the electronic fuel reversing valve is defined to be 1 and the state of the E end of the electronic fuel reversing valve is defined to be 0, the main fuel tank is in a working state, and when the state of the D end of the marker bit of the electronic fuel reversing valve is defined to be 0 and the state of the E end of the electronic fuel reversing valve is defined to be 1, the auxiliary fuel tank is in a working state;
when the actual fuel liquid level of the main fuel tank is less than or equal to the set main fuel tank liquid level minimum threshold and the actual fuel liquid level of the auxiliary fuel tank is greater than or equal to the set auxiliary fuel tank liquid level maximum threshold, the state of the D end of the flag bit of the fuel electronic reversing valve is controlled to be updated from 1 to 0, and the state of the E end of the flag bit of the fuel electronic reversing valve is controlled to be updated from 0 to 1;
the fuel electronic reversing valve is switched from a main fuel tank to an auxiliary fuel tank;
when the actual fuel liquid level of the auxiliary fuel tank is less than or equal to the set minimum liquid level threshold of the auxiliary fuel tank and the actual fuel liquid level of the main fuel tank is greater than or equal to the set maximum liquid level threshold of the main fuel tank, the state of the D end of the flag bit of the fuel electronic reversing valve is controlled to be updated from 0 to 1, and the state of the E end of the flag bit of the fuel electronic reversing valve is controlled to be updated from 1 to 0;
the electronic fuel reversing valve is switched from the auxiliary fuel tank to the main fuel tank.
6. The switching method of the fuel electronic reversing valve according to claim 4, characterized in that the method for controlling the fuel electronic reversing valve to reverse by setting a flag bit of the fuel electronic reversing valve according to the actual opening and closing state of the fuel tank comprises the following steps:
when the state of the D end of the marker bit of the electronic fuel reversing valve is defined to be 1 and the state of the E end of the electronic fuel reversing valve is defined to be 0, the main fuel tank is in a working state, and when the state of the D end of the marker bit of the electronic fuel reversing valve is defined to be 0 and the state of the E end of the electronic fuel reversing valve is defined to be 1, the auxiliary fuel tank is in a working state;
when the environment temperature is less than or equal to a set environment temperature threshold value, the engine rotating speed is less than or equal to a set operating state rotating speed threshold value, and a main oil tank and auxiliary oil tank switching switch signal is received, acquiring a mark bit of a current fuel electronic reversing valve;
if the current state of the D end of the marker bit of the electronic fuel reversing valve is 1 and the state of the E end of the electronic fuel reversing valve is 0, updating the state of the D end of the marker bit of the electronic fuel reversing valve from 1 to 0 and updating the state of the E end from 0 to 1;
the fuel electronic reversing valve is switched from a main fuel tank to an auxiliary fuel tank;
if the current state of the D end of the marker bit of the electronic fuel reversing valve is 0 and the state of the E end of the electronic fuel reversing valve is 1, updating the state of the D end of the marker bit of the electronic fuel reversing valve from 0 to 1 and updating the state of the E end from 1 to 0;
the electronic fuel reversing valve is switched from the auxiliary fuel tank to the main fuel tank.
7. A fuel electronic directional valve switching method according to any one of claims 1 to 6, wherein after acquiring a capacitive fuel level signal and determining an actual fuel level of a fuel tank in conjunction with said fuel tank size, said method further comprises:
and displaying the actual fuel level of the fuel tank.
8. An electronic fuel oil selector valve apparatus, comprising: the capacitive fuel level sensor of the main fuel tank and the capacitive fuel level sensor of the auxiliary fuel tank are respectively connected with the input end of the chassis domain controller through an internal communication CAN, the input end of the SAM controller is connected with the self-resetting selector switch of the main and auxiliary fuel tanks, the output end of the SAM controller is connected with the input end of the chassis domain controller through an external communication CAN, and the output end of the chassis domain controller is connected with the fuel electronic selector valve.
9. The electronic fuel oil reversing valve switching device according to claim 8, characterized in that the device further comprises an instrument panel, and an output end of the chassis area controller is connected with the instrument panel through an external communication CAN.
10. A fuel electronic direction valve switching apparatus as claimed in claim 1, wherein said chassis domain controller comprises:
the parameter acquisition unit is used for acquiring the size of a fuel tank, a capacitive fuel liquid level signal and a main and auxiliary fuel tank self-reset selector switch processing signal;
the parameter processing unit is used for determining the actual fuel liquid level of the fuel tank according to the capacitance type fuel liquid level signal and the size of the fuel tank, and determining the actual on-off state of the fuel tank according to the self-reset change-over switch processing signal of the main fuel tank and the auxiliary fuel tank;
and the judgment unit is used for judging whether the actual fuel liquid level and the actual switch state of the oil tank meet the following conditions: the actual fuel liquid level of the main and auxiliary fuel tanks exceeds a set fuel tank liquid level threshold value, and/or a main and auxiliary fuel tank change-over switch signal is received according to the environmental temperature and the engine speed;
and the control unit is used for controlling the fuel electronic reversing valve to reverse according to the actual fuel liquid level and the actual switching state of the fuel tank by setting the zone bit of the fuel electronic reversing valve when the condition of the judging unit is met, and controlling the fuel electronic reversing valve not to reverse when the condition of the judging unit is not met.
CN202110872933.XA 2021-07-30 2021-07-30 Fuel electronic reversing valve switching method and device Active CN113586297B (en)

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