A control method and control system for a fuel pump of an extended-range hybrid vehicle

Abstract

The present invention belongs to the field of vehicle engineering technology, and specifically relates to a control method and control system for a fuel pump of an extended-range hybrid vehicle. The control method comprises: using a detection unit to detect the remaining fuel level in the fuel tank of the extended-range hybrid vehicle and sending the remaining fuel level information to a judgment unit; using the judgment unit to select an extended-range operating mode for the extended-range hybrid vehicle based on the received remaining fuel level information, the extended-range operating modes including a normal fuel level mode and a low fuel level mode; using the judgment unit to send corresponding execution information to a control unit based on the selected extended-range operating mode, or based on the selected extended-range operating mode and receiving range extender startup information sent from a power domain controller of the extended-range hybrid vehicle; and using the control unit to control the engine and fuel pump of the extended-range hybrid vehicle to execute the functions of the selected extended-range operating mode based on the received execution information.

Description

Technical Field

[0001] The present invention belongs to the field of vehicle engineering technology, and in particular relates to a control method and a control system for a fuel pump of an extended-range hybrid vehicle. Background Art

[0002] An automotive fuel pump is a crucial component in the engine's fuel supply system. Its function is to draw fuel from the fuel tank, pressurize it, and deliver it to the fuel supply line, working with the fuel pressure regulator to establish a specific fuel pressure. Fuel pumps in gasoline-powered vehicles typically use a turbine pump. The turbine pump's rotor coils rotate within a magnetic field, driving an impeller to compress fluid entering the pump chamber. The pressurized fluid then leaves the pump chamber. The rotor coils heat up when the fuel pump is operating. When the fuel pump is filled with gasoline in the tank, the oil acts as a coolant, dissipating the heat. If the fuel pump runs dry without fuel, the heat can affect or even melt the plastic components within the pump. This can also cause frictional damage between the rotor and stator, potentially damaging the pump and preventing it from functioning properly.

[0003] The fuel pump of a traditional fuel-powered vehicle is controlled by the engine management system (EMS). The fuel pump is synchronized with the engine start signal: it operates when the engine starts and shuts down when the engine stops. Engine ignition is manually operated, so there's no need to repeatedly start the engine when the vehicle is out of fuel. For extended-range hybrid vehicles, the range extender isn't activated directly by a human, but rather by the extender's control strategy (such as activating the range extender when the SOC drops to a certain level). Existing range extender control strategies, when there's no fuel in the fuel pump, typically require repeated attempts to start the engine after a failed engine start. This presents a technical problem that can easily cause the fuel pump to dry-run, leading to overheating and damage. Summary of the Invention

[0004] In order to address the above-mentioned defects of the prior art, the present invention provides a control method and control system for the fuel pump of an extended-range hybrid vehicle to solve the technical problem that when there is no oil in the fuel pump, the control strategy of the existing range extender usually repeatedly starts the range extender to try to start the engine after the engine fails to start, which easily causes the fuel pump to run dry multiple times and thus heat and damage.

[0005] In order to achieve the above object, the technical solution of the present invention is as follows:

[0006] A method for controlling a fuel pump of an extended-range hybrid vehicle, the method comprising: detecting the remaining fuel level in a fuel tank of the extended-range hybrid vehicle using a detection unit, and sending the remaining fuel level information to a determination unit;

[0007] Using the judgment unit to select an extended-range operating mode for the extended-range hybrid vehicle according to the received remaining fuel level information, the extended-range operating mode including a normal fuel level mode and a low fuel level mode;

[0008] Using the judgment unit to send corresponding execution information to the control unit according to the selected extended-range operating mode, or according to the selected extended-range operating mode and the range extender start information received from the power domain controller of the extended-range hybrid vehicle;

[0009] Using the control unit to control the engine and fuel pump of the extended-range hybrid vehicle to execute the selected extended-range operating mode according to the received execution information;

[0010] The low fuel mode includes a low fuel range extension sub-mode and a range extension disable sub-mode; the range extension disable sub-mode is set as the initial default sub-mode of the low fuel mode;

[0011] When the extended-range hybrid vehicle is in the normal fuel level mode, if the judgment unit receives engine start success information sent by the power domain controller, the judgment unit sets the default sub-mode of the low fuel level mode to the low fuel level extended-range sub-mode;

[0012] When the extended-range hybrid vehicle is in the low-fuel-range-extended sub-mode, if the judgment unit receives engine start failure information sent by the power domain controller, the judgment unit sets the default sub-mode of the low-fuel-mode to the extended-range disabled sub-mode.

[0013] By utilizing the judgment unit to select the extended-range hybrid vehicle to enter the normal fuel mode or the low fuel mode according to the received remaining fuel information, the control method of the fuel pump of the extended-range hybrid vehicle provided by the present invention can adopt a targeted control strategy to control the fuel pump by executing the low fuel mode when the remaining fuel in the fuel tank is too low; and by making the low fuel mode include a low fuel extended-range sub-mode and an extended-range disabled sub-mode, and making the extended-range hybrid vehicle in the low fuel extended-range sub-mode, if the judgment unit receives the engine start failure information sent by the power domain controller, the judgment unit sets the default sub-mode of the low fuel mode to the extended-range disabled sub-mode, so that ... The provided method for controlling the fuel pump of a range-extended hybrid vehicle can, when the remaining fuel level in the fuel tank is too low and after a failed attempt to start the engine, switch the range-extended working mode of the range-extended hybrid vehicle to the range-extended disabling sub-mode, disabling the range-extending function of the range-extended hybrid vehicle, thereby avoiding the situation where there is no fuel in the fuel pump and the range extender is repeatedly started to try to start the engine after the engine starts, thereby avoiding the situation where the fuel pump repeatedly runs dry and is damaged by heat, and solves the technical problem that the existing control strategy of the range extender, when there is no fuel in the fuel pump, usually repeatedly starts the range extender to try to start the engine after the engine starts fail, which easily causes the fuel pump to run dry and is damaged by heat.

[0014] By setting the range-extended disabled sub-mode as the initial default sub-mode of the low-fuel-level mode, it is possible to avoid the situation where the fuel pump is completely dry-running due to the complete absence of fuel in the fuel tank when the range extender of the range-extended hybrid vehicle is first started (because when the range-extended hybrid vehicle is in the normal fuel level mode, if the judgment unit receives the engine start success information sent by the power domain controller, the judgment unit will set the default sub-mode of the low-fuel-level mode to the low-fuel-level extended-range sub-mode; so that when the range-extended hybrid vehicle is subsequently in the low-fuel-level extended-range sub-mode, the fuel tank will generally not be completely empty of fuel, and even if the engine fails to start, the fuel pump will only be relatively dry-running), thereby avoiding damage to the fuel pump due to complete dry-running.

[0015] Furthermore, the method of detecting the remaining fuel amount in the fuel tank of the extended-range hybrid vehicle using the detection unit includes:

[0016] obtaining mapping relationship information between the resistance value and the fuel level value of the fuel tank through a calibration test, and pre-storing the mapping relationship information in the detection unit;

[0017] Detecting and obtaining a current resistance value of the fuel tank using the detection unit;

[0018] The detection unit is used to obtain the remaining fuel amount value of the fuel tank according to the pre-stored mapping relationship information and the obtained current resistance value.

[0019] By acquiring the mapping relationship between the resistance value and the fuel level value of the fuel tank, the detection unit can obtain the remaining fuel level value of the fuel tank using the detected current resistance value of the fuel tank and the pre-stored mapping relationship information.

[0020] Furthermore, the judgment unit makes a judgment based on the received remaining fuel information. If the remaining fuel value in the fuel tank is not less than a preset fuel value, the judgment unit selects the extended-range operating mode for the extended-range hybrid vehicle to be the normal fuel mode; if the remaining fuel value in the fuel tank is less than the preset fuel value, the judgment unit selects the extended-range operating mode for the extended-range hybrid vehicle to be the low fuel mode.

[0021] Furthermore, the preset oil volume value ranges from 2 liters to 5 liters.

[0022] Furthermore, the preset oil volume value is 5 liters.

[0023] Furthermore, when the extended-range hybrid vehicle is in the normal fuel level mode or the low fuel level extended-range sub-mode, the judgment unit sends corresponding execution information to the control unit based on the selected extended-range operating mode and the range extender startup information received from the power domain controller of the extended-range hybrid vehicle, and the execution information indicates that both the engine and the fuel pump are turned on.

[0024] Furthermore, when the extended-range hybrid vehicle is in the extended-range disable sub-mode, the judgment unit sends corresponding execution information to the control unit according to the selected extended-range operating mode, and the execution information is to keep both the engine and the fuel pump turned off.

[0025] Furthermore, the normal fuel quantity mode includes an initial sub-mode and a normal range extension sub-mode; the initial sub-mode is set as an initial default sub-mode of the normal fuel quantity mode;

[0026] When the extended-range hybrid vehicle enters the initial sub-mode, the judgment unit sends corresponding execution information to the control unit according to the selected extended-range operating mode, the execution information being to keep the engine off and to turn off the fuel pump after it is turned on for a preset time; after the extended-range hybrid vehicle enters the initial sub-mode for the preset time, the judgment unit switches the extended-range operating mode entered by the hybrid vehicle to the normal extended-range sub-mode, and sets the default sub-mode of the normal fuel level mode to the normal extended-range sub-mode;

[0027] When the extended-range hybrid vehicle is in the normal extended-range sub-mode, the judgment unit sends corresponding execution information to the control unit according to the selected extended-range operating mode and the range extender startup information received from the power domain controller of the extended-range hybrid vehicle.

[0028] By making the normal fuel quantity mode include an initial sub-mode and a normal extended-range sub-mode; and setting the initial sub-mode as the initial default sub-mode of the normal fuel quantity mode, after the fuel tank of the extended-range hybrid vehicle is initially filled with fuel, by executing the initial sub-mode, the engine remains off, and the fuel pump is turned on for a preset time and then turned off, so as to expel air from the fuel line, thereby facilitating the engine to build up fuel rail pressure so that the engine can be started at any time.

[0029] Furthermore, the preset duration is 30 seconds.

[0030] Furthermore, when the extended-range hybrid vehicle is in the normal extended-range sub-mode, the judgment unit sends corresponding execution information to the control unit based on the selected extended-range operating mode and the range extender startup information received from the power domain controller of the extended-range hybrid vehicle, indicating that both the engine and the fuel pump are turned on.

[0031] According to the control method of the fuel pump of the extended-range hybrid vehicle provided by the present invention, the present invention also provides a control system of the fuel pump of the extended-range hybrid vehicle, including a detection unit, a judgment unit and a control unit;

[0032] The detection unit is used to detect the remaining fuel level in the fuel tank of the extended-range hybrid vehicle and send the remaining fuel level information to the judgment unit;

[0033] The judgment unit is used to select an extended-range operating mode for the extended-range hybrid vehicle according to the received remaining fuel level information, wherein the extended-range operating mode includes a normal fuel level mode and a low fuel level mode;

[0034] The judgment unit is further configured to send corresponding execution information to the control unit according to the selected extended-range operating mode, or according to the selected extended-range operating mode and the range extender start information received from the power domain controller of the extended-range hybrid vehicle;

[0035] The control unit is configured to control the engine and the fuel pump of the extended-range hybrid vehicle to execute the function of the selected extended-range working mode according to the received execution information.

[0036] Furthermore, the detection unit pre-stores mapping relationship information between the resistance value and the fuel level value of the extended-range hybrid vehicle's fuel tank;

[0037] The detection unit is used to detect and obtain the current resistance value of the fuel tank;

[0038] The detection unit is further configured to obtain a remaining fuel amount value of the fuel tank according to the pre-stored mapping relationship and the obtained current resistance value. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solution of the present invention, the following is a brief introduction to the drawings required for use in the implementation. Obviously, the drawings described below are only some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0040] Figure 1 Flowchart of the method for controlling the fuel pump of the extended-range hybrid vehicle in Example 1. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0042] Example 1:

[0043] like Figure 1 As shown, embodiment 1 provides a method for controlling a fuel pump of an extended-range hybrid vehicle, the method comprising: detecting the remaining fuel level in the fuel tank of the extended-range hybrid vehicle using a detection unit, and sending the remaining fuel level information to a determination unit;

[0044] Using the judgment unit to select an extended-range operating mode for the extended-range hybrid vehicle based on the received remaining fuel level information, the extended-range operating mode including a normal fuel level mode and a low fuel level mode;

[0045] Using the judgment unit to send corresponding execution information to the control unit according to the selected extended-range operating mode, or according to the selected extended-range operating mode and the range extender start information received from the power domain controller of the extended-range hybrid vehicle;

[0046] The control unit controls the engine and fuel pump of the extended-range hybrid vehicle to execute the selected extended-range operating mode according to the received execution information;

[0047] The low fuel mode includes a low fuel range extension sub-mode and a range extension disable sub-mode; the range extension disable sub-mode is set as the initial default sub-mode of the low fuel mode;

[0048] When the extended-range hybrid vehicle is in the normal fuel level mode, if the judgment unit receives engine start success information sent by the power domain controller, the judgment unit sets the default sub-mode of the low fuel level mode to the low fuel level extended-range sub-mode;

[0049] When the extended-range hybrid vehicle is in the low-fuel-range-extended sub-mode, if the judgment unit receives engine start failure information sent by the power domain controller, the judgment unit sets the default sub-mode of the low-fuel mode to the extended-range disabled sub-mode.

[0050] By utilizing the judgment unit to select the extended-range hybrid vehicle to enter the normal fuel mode or the low fuel mode according to the received remaining fuel information, the control method of the fuel pump of the extended-range hybrid vehicle provided by the present invention can adopt a targeted control strategy to control the fuel pump by executing the low fuel mode when the remaining fuel in the fuel tank is too low; and by making the low fuel mode include a low fuel extended-range sub-mode and an extended-range disabled sub-mode, and making the extended-range hybrid vehicle in the low fuel extended-range sub-mode, if the judgment unit receives the engine start failure information sent by the power domain controller, the judgment unit sets the default sub-mode of the low fuel mode to the extended-range disabled sub-mode, so that the fuel pump of the extended-range hybrid vehicle provided by the present invention can be controlled by the low fuel mode. The fuel pump control method can, when the remaining fuel amount in the fuel tank is too low, after a failed attempt to start the engine, the range-extended hybrid vehicle's range-extended working mode will be switched to the range-extended disabled sub-mode, disabling the range-extended function of the range-extended hybrid vehicle, avoiding the situation where there is no fuel in the fuel pump and the engine fails to start, and repeatedly starting the range extender to try to start the engine, thereby avoiding the situation where the fuel pump repeatedly runs dry and is damaged by heat. This solves the technical problem that the existing range extender control strategy, when there is no fuel in the fuel pump, usually repeatedly starts the range extender to try to start the engine after the engine fails to start, which easily causes the fuel pump to run dry and be damaged by heat.

[0051] By setting the range-extended disable sub-mode to the initial default sub-mode of the low-fuel-level mode, it is possible to avoid the situation where the fuel pump is completely dry-running due to the complete absence of fuel in the fuel tank when the range extender of the range-extended hybrid vehicle is first started (because when the range-extended hybrid vehicle is in the normal fuel level mode, if the judgment unit receives the engine start success information sent by the power domain controller, the judgment unit will set the default sub-mode of the low-fuel-level mode to the low-fuel-level range-extended sub-mode; so that when the range-extended hybrid vehicle is subsequently in the low-fuel-level range-extended sub-mode, the fuel tank will usually not be completely empty of fuel. Even if the engine fails to start, the fuel pump will only be relatively dry-running), thereby avoiding damage to the fuel pump due to complete dry-running.

[0052] In one embodiment, a method for detecting the remaining fuel level in a fuel tank of a range-extended hybrid vehicle using a detection unit includes:

[0053] Obtaining mapping relationship information between the resistance value and the fuel volume value of the fuel tank through calibration testing, and pre-storing the mapping relationship information in the detection unit;

[0054] Utilize the detection unit to detect and obtain the current resistance value of the fuel tank;

[0055] The detection unit is used to obtain the remaining fuel amount value of the fuel tank according to the pre-stored mapping relationship information and the obtained current resistance value.

[0056] By acquiring the mapping relationship between the resistance value and the fuel level value of the fuel tank, the detection unit can obtain the remaining fuel level value of the fuel tank using the detected current resistance value of the fuel tank and the pre-stored mapping relationship information.

[0057] Specifically, in this embodiment 1, Figure 1 As shown, the judgment unit makes a judgment based on the received remaining fuel information. If the remaining fuel value in the fuel tank is not less than the preset fuel value, the judgment unit selects the extended-range operating mode for the extended-range hybrid vehicle to be the normal fuel mode; if the remaining fuel value in the fuel tank is less than the preset fuel value, the judgment unit selects the extended-range operating mode for the extended-range hybrid vehicle to be the low fuel mode.

[0058] Specifically, in this embodiment 1, the preset oil amount value ranges from 2 liters to 5 liters.

[0059] Preferably, in this embodiment 1, the preset oil volume value is 5 liters.

[0060] In one embodiment, when the extended-range hybrid vehicle is in the normal fuel level mode or the low fuel level extended-range sub-mode, the judgment unit sends corresponding execution information to the control unit based on the selected extended-range operating mode and the range extender startup information sent by the power domain controller of the extended-range hybrid vehicle. The execution information indicates that both the engine and the fuel pump are turned on.

[0061] In one embodiment, Figure 1 As shown, when the extended-range hybrid vehicle is in the extended-range disabled sub-mode, the judgment unit sends corresponding execution information to the control unit according to the selected extended-range working mode, and the execution information is to keep both the engine and the fuel pump turned off.

[0062] In this embodiment 1, preferably, Figure 1 As shown, the normal fuel mode includes an initial sub-mode and a normal range-extending sub-mode; the initial sub-mode is set as the initial default sub-mode of the normal fuel mode;

[0063] When the extended-range hybrid vehicle enters the initial sub-mode, the judgment unit sends corresponding execution information to the control unit based on the selected extended-range operating mode. The execution information is to keep the engine off and turn off the fuel pump after it is turned on for a preset time. After the extended-range hybrid vehicle enters the initial sub-mode for the preset time, the judgment unit switches the extended-range operating mode entered by the hybrid vehicle to the normal extended-range sub-mode and sets the default sub-mode of the normal fuel level mode to the normal extended-range sub-mode.

[0064] When the extended-range hybrid vehicle is in the normal extended-range sub-mode, the judgment unit sends corresponding execution information to the control unit according to the selected extended-range operating mode and the range extender startup information received from the power domain controller of the extended-range hybrid vehicle.

[0065] By making the normal fuel quantity mode include an initial sub-mode and a normal extended-range sub-mode; and setting the initial sub-mode as the initial default sub-mode of the normal fuel quantity mode; it is possible to make it possible for the extended-range hybrid vehicle to keep the engine off by executing the initial sub-mode after the fuel is first added to the fuel tank of the vehicle, and to turn the fuel pump on for a preset time and then off to expel air from the fuel line, thereby facilitating the engine to build up fuel rail pressure so that the engine can be started at any time.

[0066] Preferably, in this embodiment 1, the preset duration is 30 seconds.

[0067] Specifically, in this first embodiment, when the extended-range hybrid vehicle is in the normal extended-range sub-mode, the judgment unit sends corresponding execution information to the control unit, indicating that both the engine and the fuel pump are turned on, based on the selected extended-range operating mode and the range extender start information received from the power domain controller of the extended-range hybrid vehicle.

[0068] Example 2:

[0069] According to the control method of the fuel pump of the extended-range hybrid vehicle provided in Example 1, Example 2 provides a control system of the fuel pump of the extended-range hybrid vehicle, including a detection unit, a judgment unit and a control unit;

[0070] The detection unit is used to detect the remaining fuel level in the fuel tank of the extended-range hybrid vehicle and send the remaining fuel level information to the judgment unit;

[0071] The judgment unit is used to select an extended-range operating mode for the extended-range hybrid vehicle to enter according to the received remaining fuel level information, the extended-range operating mode including a normal fuel level mode and a low fuel level mode;

[0072] The judgment unit is further configured to send corresponding execution information to the control unit according to the selected extended-range operating mode, or according to the selected extended-range operating mode and the range extender start information received from the power domain controller of the extended-range hybrid vehicle;

[0073] The control unit is used to control the engine and fuel pump of the extended-range hybrid vehicle to execute the selected extended-range working mode according to the received execution information.

[0074] Preferably, in this embodiment 2, the detection unit pre-stores mapping relationship information between the resistance value and the fuel level value of the extended-range hybrid vehicle's fuel tank;

[0075] The detection unit is used to detect and obtain the current resistance value of the fuel tank;

[0076] The detection unit is further used to obtain the remaining fuel value of the fuel tank according to the pre-stored mapping relationship and the obtained current resistance value.

[0077] The control method and control system for the fuel pump of an extended-range hybrid vehicle provided by the present invention have at least the following technical effects or advantages:

[0078] 1. By using a judgment unit to select whether the extended-range hybrid vehicle enters a normal fuel level mode or a low fuel level mode according to the received remaining fuel level information, the control method of the fuel pump of the extended-range hybrid vehicle provided by the present invention can control the fuel pump by implementing a targeted control strategy by executing the low fuel level mode when the remaining fuel level in the fuel tank is too low; and by making the low fuel level mode include a low fuel level extended-range sub-mode and an extended-range disabled sub-mode, and when the extended-range hybrid vehicle is in the low fuel level extended-range sub-mode, if the judgment unit receives an engine start failure information sent by the power domain controller, the judgment unit sets the default sub-mode of the low fuel level mode to the extended-range disabled sub-mode, so that the extended-range hybrid vehicle provided by the present invention can be controlled by the fuel pump of the extended-range hybrid vehicle provided by the present invention. The fuel pump control method can, when the remaining oil amount in the fuel tank is too low, after a failed attempt to start the engine, the range-extended hybrid vehicle's range-extended working mode will switch to the range-extended disabled sub-mode, disabling the range-extended function of the range-extended hybrid vehicle, avoiding the situation where there is no oil in the fuel pump and the engine fails to start, and repeatedly starting the range extender to try to start the engine, thereby avoiding the situation where the fuel pump repeatedly runs dry and is damaged by heat. The control strategy of the existing range extender solves the technical problem that when there is no oil in the fuel pump, the range extender is usually repeatedly started multiple times to try to start the engine after the engine fails to start, which easily causes the fuel pump to run dry multiple times and be damaged by heat.

[0079] 2. By setting the range-extended disable sub-mode to the initial default sub-mode of the low-fuel-level mode, it is possible to avoid the situation where the fuel pump is completely dry-running due to the complete absence of fuel in the fuel tank when the range extender of the range-extended hybrid vehicle is first started (because when the range-extended hybrid vehicle is in the normal fuel level mode, if the judgment unit receives the engine start success information sent by the power domain controller, the judgment unit will set the default sub-mode of the low-fuel-level mode to the low-fuel-level range-extended sub-mode; when the range-extended hybrid vehicle is subsequently in the low-fuel-level range-extended sub-mode, the fuel tank will generally not be completely empty of fuel. Even if the engine fails to start, the fuel pump will only be relatively dry-running), thereby avoiding damage to the fuel pump due to complete dry-running.

[0080] 3. By obtaining the mapping relationship between the resistance value and the fuel level value of the fuel tank, the detection unit can use the detected current resistance value of the fuel tank and the pre-stored mapping relationship information to obtain the remaining fuel level value of the fuel tank.

[0081] 4. By making the normal fuel quantity mode include an initial sub-mode and a normal extended-range sub-mode, and setting the initial sub-mode as the initial default sub-mode of the normal fuel quantity mode, after the fuel tank of the extended-range hybrid vehicle is first filled with fuel, by executing the initial sub-mode, the engine remains off, and the fuel pump is turned on for a preset time and then turned off to expel air from the fuel line, thereby facilitating the engine to build up fuel rail pressure for ready starting.

[0082] The above are only specific application examples of the present invention and do not constitute any limitation to the protection scope of the present invention. Any technical solutions formed by equivalent transformation or equivalent replacement shall fall within the protection scope of the present invention.

Claims

1. A method for controlling a fuel pump of an extended-range hybrid vehicle, characterized in that: The control method includes: using a detection unit to detect the remaining fuel amount in the fuel tank of the extended-range hybrid vehicle, and sending the remaining fuel amount information to a judgment unit; Using the judgment unit to select an extended-range operating mode for the extended-range hybrid vehicle according to the received remaining fuel level information, the extended-range operating mode including a normal fuel level mode and a low fuel level mode; Using the judgment unit to send corresponding execution information to the control unit according to the selected extended-range operating mode, or according to the selected extended-range operating mode and the range extender start information received from the power domain controller of the extended-range hybrid vehicle; Using the control unit to control the engine and fuel pump of the extended-range hybrid vehicle to execute the selected extended-range operating mode according to the received execution information; The low fuel mode includes a low fuel range extension sub-mode and a range extension disable sub-mode; the range extension disable sub-mode is set as the initial default sub-mode of the low fuel mode; When the extended-range hybrid vehicle is in the normal fuel level mode, if the judgment unit receives engine start success information sent by the power domain controller, the judgment unit sets the default sub-mode of the low fuel level mode to the low fuel level extended-range sub-mode; When the extended-range hybrid vehicle is in the low-fuel-range-extended sub-mode, if the judgment unit receives engine start failure information sent by the power domain controller, the judgment unit sets the default sub-mode of the low-fuel-mode to the extended-range disabled sub-mode.

2. The method for controlling a fuel pump of an extended-range hybrid vehicle according to claim 1, characterized in that: The method for detecting the remaining fuel amount in the fuel tank of the range-extended hybrid vehicle using a detection unit includes: obtaining mapping relationship information between the resistance value and the fuel level value of the fuel tank through a calibration test, and pre-storing the mapping relationship information in the detection unit; Detecting and obtaining a current resistance value of the fuel tank using the detection unit; The detection unit is used to obtain the remaining fuel amount value of the fuel tank according to the pre-stored mapping relationship information and the obtained current resistance value.

3. The method for controlling a fuel pump of an extended-range hybrid vehicle according to claim 1, characterized in that: The judgment unit makes a judgment based on the received remaining fuel level information. If the remaining fuel level value in the fuel tank is not less than a preset fuel level value, the judgment unit selects the extended-range operating mode for the extended-range hybrid vehicle to be the normal fuel level mode; if the remaining fuel level value in the fuel tank is less than the preset fuel level value, the judgment unit selects the extended-range operating mode for the extended-range hybrid vehicle to be the low fuel level mode.

4. The method for controlling a fuel pump of an extended-range hybrid vehicle according to claim 3, characterized in that: The preset oil volume value ranges from 2 liters to 5 liters.

5. The method for controlling a fuel pump of an extended-range hybrid vehicle according to claim 1, characterized in that: When the extended-range hybrid vehicle is in the normal fuel level mode or the low fuel level extended-range sub-mode, the judgment unit sends corresponding execution information to the control unit based on the selected extended-range operating mode and the range extender startup information received from the power domain controller of the extended-range hybrid vehicle, where the execution information indicates that both the engine and the fuel pump are turned on.

6. The method for controlling a fuel pump of an extended-range hybrid vehicle according to claim 1, characterized in that: When the extended-range hybrid vehicle is in the extended-range disable sub-mode, the judgment unit sends corresponding execution information to the control unit according to the selected extended-range operating mode, and the execution information is to keep both the engine and the fuel pump turned off.

7. The method for controlling a fuel pump of an extended-range hybrid vehicle according to claim 1, characterized in that: The normal fuel quantity mode includes an initial sub-mode and a normal range extension sub-mode; the initial sub-mode is set as the initial default sub-mode of the normal fuel quantity mode; When the extended-range hybrid vehicle enters the initial sub-mode, the judgment unit sends corresponding execution information to the control unit according to the selected extended-range operating mode, wherein the execution information is to keep the engine off and turn off the fuel pump after it is turned on for a preset time; After the extended-range hybrid vehicle enters the initial sub-mode for the preset time period, the judgment unit switches the extended-range operating mode entered by the hybrid vehicle to the normal extended-range sub-mode, and sets the default sub-mode of the normal fuel level mode to the normal extended-range sub-mode; When the extended-range hybrid vehicle is in the normal extended-range sub-mode, the judgment unit sends corresponding execution information to the control unit according to the selected extended-range operating mode and the range extender startup information received from the power domain controller of the extended-range hybrid vehicle.

8. The method for controlling a fuel pump of an extended-range hybrid vehicle according to claim 7, characterized in that: When the extended-range hybrid vehicle is in the normal extended-range sub-mode, the judgment unit sends corresponding execution information to the control unit according to the selected extended-range operating mode and the range extender start information sent from the power domain controller of the extended-range hybrid vehicle, that is, both the engine and the fuel pump are turned on.

9. A fuel pump control system for an extended-range hybrid vehicle, characterized by: It includes a detection unit, a judgment unit and a control unit; The detection unit is used to detect the remaining fuel level in the fuel tank of the extended-range hybrid vehicle and send the remaining fuel level information to the judgment unit; The judgment unit is used to select an extended-range operating mode for the extended-range hybrid vehicle according to the received remaining fuel level information, wherein the extended-range operating mode includes a normal fuel level mode and a low fuel level mode; The judgment unit is further configured to send corresponding execution information to the control unit according to the selected extended-range operating mode, or according to the selected extended-range operating mode and the range extender start information received from the power domain controller of the extended-range hybrid vehicle; The control unit is configured to control the engine and the fuel pump of the extended-range hybrid vehicle to execute the selected extended-range operating mode according to the received execution information; The control system of the fuel pump of the extended-range hybrid vehicle is used to execute the steps of the method for controlling the fuel pump of the extended-range hybrid vehicle according to any one of claims 1 to 8.

10. The control system for the fuel pump of an extended-range hybrid vehicle according to claim 9, characterized in that: The detection unit pre-stores mapping relationship information between the resistance value and the fuel level value of the extended-range hybrid vehicle's fuel tank; The detection unit is used to detect and obtain the current resistance value of the fuel tank; The detection unit is further configured to obtain a remaining fuel amount value of the fuel tank according to the pre-stored mapping relationship and the obtained current resistance value.

Images