New energy vehicle power takeoff control system and method based on double axles

Abstract

The invention discloses a new energy vehicle power takeoff control system and method based on double axles, and belongs to the technical field of power takeoffs and gearboxes, the control system comprises a motor a and a motor b which correspond to a non-power takeoff axle and a power takeoff axle respectively, the motor a and a gearbox a are mechanically combined and separated, and the motor b and a gearbox b are mechanically combined and separated; the gearbox b and the power takeoff are mechanically combined and separated; the signal input end of the control unit is electrically connected with the vehicle switch control information unit and the vehicle state information unit, and the signal output end of the control unit is electrically connected with control switches of the gearbox a, the gearbox b, the motor a and the motor b. The power output requirement of the power takeoff can be met while the driving requirement of a driver can be met, meanwhile, the rotating speed needed by the power takeoff can be accurately controlled, and accurate regulation and control over the rotating speed are achieved.

Description

Technical Field

[0001] The present invention relates to a control system and method for a power take-off of a new energy vehicle based on a double bridge, belonging to the technical field of power take-offs and gearboxes. Background Art

[0002] A power take-off (PTO) is a mechanical device that extracts power from a power source, such as an engine or drive motor, and transmits it to an external device. It is widely used in agricultural machinery, construction machinery, trucks, and other transportation vehicles, primarily to drive various auxiliary equipment or fulfill specific functional requirements. In existing PTO control technologies for new energy vehicles, when the vehicle is in the parking PTO mode (i.e., when there is no driving demand), the PTO speed is typically adjusted using the accelerator pedal or an operating switch. However, during driving PTO, there is a significant conflict between driving and PTO requirements, making it difficult to simultaneously meet the driver's driving needs and the PTO's power output requirements. Prioritizing the driver's driving needs may result in the PTO's power output failing to meet expectations, thus failing to fully meet the PTO's demand. However, prioritizing the PTO's power output may restrict the driver's ability to operate the vehicle normally, impacting the vehicle's driving performance and driving experience. In summary, prioritizing driving needs may result in interruptions in the PTO process. Conversely, ignoring driving needs while meeting PTO requirements may pose a potential danger to other road users. In addition, in the parking power take-off scenarios of existing new energy vehicles, since the power take-off is mainly controlled by the accelerator pedal, the driver cannot intuitively understand the dynamic situation of the power take-off device, and it is difficult to accurately control the speed required by the power take-off, which is not conducive to achieving precise control of the speed and affects the effect of refined control. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the defects of the existing technology and provide a power take-off control system and method for new energy vehicles based on dual bridges, which can meet the driving needs of the driver while taking into account the power output requirements of the power take-off, and at the same time can accurately control the speed required by the power take-off, thereby realizing precise control of the speed.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0005] In the first aspect, the present invention provides a power take-off control system for a new energy vehicle based on a dual-bridge, comprising a motor a and a motor b corresponding to a non-power take-off bridge and a power take-off bridge respectively, wherein the motor a and the motor b are powered by a battery, the motor a is mechanically coupled and separated from the gearbox a, the motor b is mechanically coupled and separated from the gearbox b, and the gearbox b is mechanically coupled and separated from the power take-off; and further comprising a control unit, the signal input end of the control unit being electrically connected to a vehicle switch control information unit and a vehicle status information unit respectively, the vehicle switch control information unit including a mobile phone app, a Set+ / - switch, a parking / driving power take-off switch and a power take-off cancellation switch, the vehicle status information unit including an EPB clamping status / handbrake pulling status monitoring unit, a Ready status monitoring unit, a motor and gearbox fault status monitoring unit, a vehicle speed information monitoring unit, an accelerator pedal opening monitoring unit, a brake pedal switch status monitoring unit and a slope information monitoring unit; the signal output end of the control unit is electrically connected to the control switches of gearbox a, gearbox b, motor a and motor b respectively.

[0006] The mobile APP must undergo information security certification on the enterprise cloud and vehicle side before use.

[0007] In a second aspect, the present invention provides a method for controlling a power take-off device of a new energy vehicle based on a dual-bridge, for parking power take-off control, comprising the following steps:

[0008] Receive the power take-off enable signal and target speed information from the mobile phone APP, start the power take-off, and proceed to the next step:

[0009] Receive vehicle speed information and determine whether the vehicle speed is zero. If the condition is met, proceed to the next step;

[0010] Receive the vehicle's Ready status information and determine whether the vehicle is in the Ready state. If the conditions are met, proceed to the next step;

[0011] Receive EPB clamping status information or parking brake pulling status information, determine whether the EPB is clamped or the parking brake is pulled, and if the conditions are met, proceed to the next step;

[0012] Receive motor status information and gearbox status information, determine whether the motor and gearbox are faulty, and if neither is faulty, proceed to the next step;

[0013] Control transmission b and transmission a to shift into N gear, and control transmission b to engage with the power take-off;

[0014] Control motor a to enter the standby state, and at the same time adjust the target speed of motor b according to the power take-off target speed information.

[0015] When it is determined that the vehicle speed is not zero, the vehicle is not in the Ready state, the EPB is not clamped, the parking brake is not pulled, or there is a fault in the motor and gearbox, the control will issue an enable prompt message.

[0016] After the gearbox B is combined with the power take-off, the control sends a prompt message to enter the power take-off mode.

[0017] In a third aspect, the present invention provides a method for controlling a power take-off device of a new energy vehicle based on a dual-bridge, which is used for driving power take-off control, comprising the following steps:

[0018] Receive the power take-off enable signal from the driving power take-off switch, turn on the power take-off, and then receive the power take-off target speed information from the Set+ / - switch to proceed to the next step;

[0019] Receive the vehicle's Ready status information and determine whether the vehicle is in the Ready state. If the conditions are met, proceed to the next step;

[0020] Receive motor status information and gearbox status information, determine whether the motor and gearbox are faulty, and if both are determined not to be faulty, proceed to the next step;

[0021] Receive the gear position information of transmission b and determine whether the gear position of transmission b is N gear. If not, control transmission b to shift into N gear and convert the target speed information into torque demand before transferring it to the non-power take-off axle;

[0022] Control the combination of gearbox b and power take-off;

[0023] According to the target speed information, the target speed of motor b is adjusted;

[0024] If the accelerator pedal opening increases or the slope information is greater than the preset value, the axle where the power take-off is located will be engaged into the driving gear, and the control motor B will be adjusted according to the control method of the non-power take-off axle;

[0025] If the brake pedal is turned on, the transmission b is controlled to shift into the N gear, and the motor b is controlled to run according to the target speed information.

[0026] Long press the Set+ / Set- switch to increase / decrease the speed by 100 Rpm. Short press the Set+ / Set- switch to increase / decrease the speed by 50 Rpm.

[0027] When the vehicle is not in the Ready state or there is a fault in the motor and gearbox, the control will issue an enable prompt message.

[0028] After the gearbox B is combined with the power take-off, the control sends a prompt message to enter the power take-off mode.

[0029] When it is necessary to stop driving to take off power, the transmission b is controlled to be disconnected from the power take-off, and a prompt message to exit driving power take-off is issued.

[0030] Beneficial effects of the present invention: The present invention provides a power take-off control system and method for new energy vehicles based on a double bridge. During driving power take-off, the double bridge form commonly used in new energy vehicles is utilized to isolate the driving and driving power sources, making it convenient for the driver to take power while driving. When the driving demand is met, the vehicle can help the driver to cope with the surrounding traffic environment well and meet the power take-off demand. The vehicle can help the driver meet the power take-off demand, and there will be no situation where the power take-off suddenly stops when the driver steps on the brake. In addition, the vehicle switch control information unit includes a mobile phone app, and the mobile phone app sends a control power take-off enable signal and power take-off target speed information. A mechanism for remotely controlling the power take-off speed is introduced, so that the driver can intuitively observe the power take-off speed adjustment process after getting off the vehicle, which can greatly improve the convenience of operation and allow the driver to easily and accurately adjust the speed to the target value, thereby achieving efficient and convenient control of the power take-off speed, bringing significant optimization to driving operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a schematic diagram of the mechanical connection structure of a power take-off control system for a new energy vehicle based on a dual-bridge provided by the present invention;

[0032] Figure 2 This is a control schematic diagram of a power take-off control system for a new energy vehicle based on a dual-bridge provided by the present invention;

[0033] Figure 3 This is a parking power take-off logic flow chart of a power take-off control method for a new energy vehicle based on a dual-bridge provided by the present invention;

[0034] Figure 4 This is a driving power take-off logic flow chart of a power take-off control method for a new energy vehicle based on a dual-bridge provided by the present invention;

[0035] Figure 5 This is a logic flow chart of exiting driving power take-off of a power take-off control method for a new energy vehicle based on a dual-bridge provided by the present invention. DETAILED DESCRIPTION

[0036] The present invention will be further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention and are not intended to limit the scope of protection of the present invention.

[0037] Example 1

[0038] The present invention provides a new energy vehicle power take-off control system based on a double bridge, comprising a mechanical part and a signal control part. Figure 1As shown, the mechanical part includes motors a and b, corresponding to the non-power take-off bridge and the power take-off bridge respectively. Motors a and b are powered by batteries, which provide energy for the entire system. Motor a is mechanically connected and disconnected with gearbox a, motor b is mechanically connected and disconnected with gearbox b, and gearbox b is mechanically connected and disconnected with the power take-off. Motor a is used only for driving, while motor b can be used for both driving and power take-off.

[0039] like Figure 2 As shown, the signal control part includes a control unit, and the signal input end of the control unit is electrically connected to the vehicle switch control information unit and the vehicle status information unit respectively. The vehicle switch control information unit includes a mobile phone app, a Set+ / - switch, a parking / driving power take-off switch and a power take-off cancellation switch. The vehicle status information unit includes an EPB clamping status / handbrake pull-up status monitoring unit, a Ready status monitoring unit, a motor and gearbox fault status monitoring unit, a vehicle speed information monitoring unit, an accelerator pedal opening monitoring unit, a brake pedal switch status monitoring unit and a slope information monitoring unit; the signal output end of the control unit is electrically connected to the control switches of gearbox a, gearbox b, motor a and motor b respectively.

[0040] In existing parking PTO control systems, drivers often control the PTO via the Set+ / Set- buttons in the cockpit or the accelerator pedal. However, due to limited visibility, drivers often cannot precisely control the PTO speed. This invention adds a remote PTO speed control method, enabling PTO control via a mobile app. This allows the driver to exit the vehicle and observe the PTO speed adjustment process, allowing them to conveniently control the target speed. Furthermore, the mobile app undergoes information security authentication on both the enterprise cloud and the vehicle before use. The vehicle will not respond to unauthenticated information, enhancing the security of the control system.

[0041] like Figure 3 As shown, the present invention provides a method for controlling a power take-off device of a new energy vehicle based on a dual-bridge, which is used for parking power take-off control, comprising the following steps:

[0042] Step 1: Receive the power take-off enable signal and target speed information from the mobile app, activate power take-off, and proceed to the next step. Alternatively, you can use a hardwired activation (local Set+ / - or local accelerator pedal) && parking power take-off. When using the local accelerator pedal to control power take-off, the speed is controlled based on the corresponding accelerator pedal opening. Finally, Set+ / - and other hardwires mentioned here are for reference only; the vehicle can be controlled through other means, including but not limited to soft switches and voice commands.

[0043] Step 2: Receive vehicle speed information and determine whether the vehicle speed is zero. If the condition is met, proceed to the next step.

[0044] Step 3: Receive the vehicle's Ready status information and determine whether the vehicle is in the Ready state. If the conditions are met, proceed to the next step.

[0045] Step 4: Receive EPB clamping status information or parking brake pulling status information, determine whether the EPB is clamped or the parking brake is pulled, and if the conditions are met, proceed to the next step.

[0046] Step 5: Receive the motor status information and the gearbox status information, and determine whether there is a fault in the motor and the gearbox. If it is determined that there is no fault, proceed to the next step.

[0047] Step six, control gearbox b and gearbox a to shift into N gear, and control gearbox b to engage with the power take-off. After gearbox b is engaged with the power take-off, control the issuance of a prompt message to enter the power take-off mode.

[0048] Step seven: Control motor a to enter the standby state, and at the same time, accurately adjust the target speed of motor b based on the power take-off target speed information.

[0049] In addition, when it is determined that the vehicle speed is not zero, the vehicle is not in the Ready state, the EPB is not clamped, the parking brake is not pulled up, or there is a fault in the motor and gearbox, the control will issue an enable prompt message.

[0050] Finally, the double bridges in this application are only a reference, and the number of bridges can be greater than 2, and the aforementioned control system and method can also be used.

[0051] Example 2

[0052] This embodiment provides a method for controlling a power take-off device of a new energy vehicle based on a dual-bridge, based on the first embodiment, for driving power take-off control, including the following steps:

[0053] In step 1, the driver activates the PTO function by pressing the driving PTO switch. The driver then receives the PTO enable signal from the driving PTO switch, enabling PTO. The driver then receives the PTO target speed information from the Set+ / - switch to proceed to the next step. In the local Set+ / Set- function, a specific target speed can be controlled. A long press (settable for more than 1 second) of Set+ / Set- increases / decreases the speed by 100 RPM (calibrated amount). A short press (settable for less than 1 second) of Set+ / Set- increases / decreases the speed by 50 RPM (calibrated amount). The speed value controlled by Set+ / Set- must be within the system's speed range.

[0054] Step 2: Receive the vehicle's Ready status information and determine whether the vehicle is in the Ready state. If the conditions are met, proceed to the next step.

[0055] Step 3: Receive the motor status information and the gearbox status information, and determine whether the motor and the gearbox have faults. If both are determined not to have faults, proceed to the next step.

[0056] Step 4: Receive the gear position information from transmission B and determine whether it is in N. If not, shift transmission B into N. Simultaneously, convert the target speed information into a torque demand and transfer it to the non-power-taking axle. When the demanded torque is transferred to the other axle, the transition should be smooth, without any vehicle jitter.

[0057] Step 5: Control the transmission b to engage with the power take-off and send a prompt to the driver that the power take-off mode has been entered.

[0058] Step six: adjust the target speed of motor b according to the target speed information.

[0059] In step 7, if the accelerator pedal position increases or the slope is greater than a preset value (this determines whether the vehicle requires high torque), the axle where the power take-off is located is engaged in the drive gear, and motor B is controlled in the same manner as the non-power take-off axle. If there is no high torque requirement, the current state is maintained.

[0060] Step 8: If the brake pedal is turned on, the transmission b is controlled to shift into the neutral position and the motor b is controlled to operate according to the target speed information. If the driver does not brake, the previous operating state is maintained.

[0061] If the vehicle is not in the Ready state or there is a fault in the motor or gearbox, the control will issue a prompt message that it cannot be enabled. If it is necessary to stop driving to take off power, the control will disconnect the gearbox B from the power take-off and issue a prompt message to exit driving power take-off.

[0062] The present invention provides a power take-off control method for a new energy vehicle with a dual-bridge device, which implements a situation where one bridge drives and the other bridge takes power, and can take into account both power take-off requirements and driving requirements.

[0063] like Figure 5 As shown, when the vehicle stops taking power during driving, the method for controlling the power take-off of a new energy vehicle includes the following steps:

[0064] Step 1: Exit the hard-wired power take-off function or the mobile app power take-off function.

[0065] Step 2: Control the gearbox where the power take-off bridge is located to disconnect from the power take-off;

[0066] Step three: prompt the driver to exit driving power take-off.

[0067] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A power take-off control system for a new energy vehicle based on a dual-bridge, characterized by: It includes motor a and motor b corresponding to the non-power-take-off bridge and the power-take-off bridge respectively, and the motor a and motor b are powered by a battery. The motor a is mechanically coupled and separated from the gearbox a, the motor b is mechanically coupled and separated from the gearbox b, and the gearbox b is mechanically coupled and separated from the power take-off; it also includes a control unit, the signal input end of the control unit is electrically connected to the vehicle switch control information unit and the vehicle status information unit respectively, the vehicle switch control information unit includes a mobile phone app, a Set+ / - switch, a parking / driving power take-off switch and a power take-off cancellation switch, the vehicle status information unit includes an EPB clamping status / handbrake pulling status monitoring unit, a Ready status monitoring unit, a motor and gearbox fault status monitoring unit, a vehicle speed information monitoring unit, an accelerator pedal opening monitoring unit, a brake pedal switch status monitoring unit and a slope information monitoring unit; the signal output end of the control unit is electrically connected to the control switches of gearbox a, gearbox b, motor a and motor b respectively.

2. The method for controlling a power take-off of a new energy vehicle based on a dual-bridge according to claim 1, characterized in that: The mobile APP must undergo information security certification on the enterprise cloud and vehicle side before use.

3. A power take-off control method for a new energy vehicle based on a dual-bridge, characterized by: It is used for parking power take-off control, including the following steps: Receive the power take-off enable signal and target speed information from the mobile phone APP, start the power take-off, and proceed to the next step: Receive vehicle speed information and determine whether the vehicle speed is zero. If the condition is met, proceed to the next step; Receive the vehicle's Ready status information and determine whether the vehicle is in the Ready state. If the conditions are met, proceed to the next step; Receive EPB clamping status information or parking brake pulling status information, determine whether the EPB is clamped or the parking brake is pulled, and if the conditions are met, proceed to the next step; Receive motor status information and gearbox status information, determine whether the motor and gearbox are faulty, and if neither is faulty, proceed to the next step; Control transmission b and transmission a to shift into N gear, and control transmission b to engage with the power take-off; Control motor a to enter the standby state, and at the same time adjust the target speed of motor b according to the power take-off target speed information.

4. The method for controlling a power take-off of a new energy vehicle based on a dual-bridge according to claim 3, characterized in that: When it is determined that the vehicle speed is not zero, the vehicle is not in the Ready state, the EPB is not clamped, the parking brake is not pulled, or there is a fault in the motor and gearbox, the control will issue an enable prompt message.

5. The power take-off control method for a new energy vehicle based on a dual-bridge according to claim 3, characterized in that: After the gearbox B is combined with the power take-off, the control sends a prompt message to enter the power take-off mode.

6. A power take-off control method for a new energy vehicle based on a dual-bridge, characterized in that: It is used for driving power take-off control, including the following steps: Receive the power take-off enable signal from the driving power take-off switch, turn on the power take-off, and then receive the power take-off target speed information from the Set+ / - switch to proceed to the next step; Receive the vehicle's Ready status information and determine whether the vehicle is in the Ready state. If the conditions are met, proceed to the next step; Receive motor status information and gearbox status information, determine whether the motor and gearbox are faulty, and if both are determined not to be faulty, proceed to the next step; Receive the gear position information of transmission b and determine whether the gear position of transmission b is N gear. If not, control transmission b to shift into N gear and convert the target speed information into torque demand before transferring it to the non-power take-off axle; Control the combination of gearbox b and power take-off; According to the target speed information, the target speed of motor b is adjusted; If the accelerator pedal opening increases or the slope information is greater than the preset value, the axle where the power take-off is located will be engaged into the driving gear, and the control motor B will be adjusted according to the control method of the non-power take-off axle; If the brake pedal is turned on, the transmission b is controlled to shift into the N gear, and the motor b is controlled to run according to the target speed information.

7. The method for controlling a power take-off of a new energy vehicle based on a dual-bridge according to claim 6, characterized in that: Long press the Set+ / Set- switch to increase / decrease the speed by 100 Rpm. Short press the Set+ / Set- switch to increase / decrease the speed by 50 Rpm.

8. The method for controlling a power take-off of a new energy vehicle based on a dual-bridge according to claim 6, characterized in that: When the vehicle is not in the Ready state or there is a fault in the motor and gearbox, the control will issue an enable prompt message.

9. The method for controlling a power take-off of a new energy vehicle based on a dual-bridge according to claim 6, characterized in that: After the gearbox B is combined with the power take-off, the control sends a prompt message to enter the power take-off mode.

10. The method for controlling a power take-off of a new energy vehicle based on a dual-bridge according to claim 6, characterized in that: When it is necessary to stop driving to take off power, the transmission b is controlled to be disconnected from the power take-off, and a prompt message to exit driving power take-off is issued.

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