WO2022089106A1

WO2022089106A1 - Driving device, hybrid truck driving method, and hybrid truck

Info

Publication number: WO2022089106A1
Application number: PCT/CN2021/119910
Authority: WO
Inventors: 洪智
Original assignee: 洪智; 南京司凯奇汽车科技有限公司
Priority date: 2020-10-30
Filing date: 2021-09-23
Publication date: 2022-05-05
Also published as: CN112298160A

Abstract

Provided are a driving device (100), and a hybrid truck driving method. The driving device (100) comprises a controller (1), an engine (2), a clutch (3), a first motor (4), a second motor (5), a third motor (6), a multi-speed transmission (7), a second transmission (8), and a third transmission (9); the engine (2), the clutch (3), and the first motor (4) constitute a powertrain system to provide driving torque to a drive mechanism of a truck, or the first motor (4) or the engine (2) separately provide driving torque to a traveling mechanism of the truck; the second motor (5), the third motor (6), the second transmission (8), and the third transmission (9) constitute a powertrain system to provide driving torque to the traveling mechanism of the truck; the controller controls, according to an operating mode signal, the engine (2), the first motor (4), the second motor (5), and the third motor (6) to output operating states.

Description

Driving device, driving method of hybrid truck, and hybrid truck

This application claims the priority of a Chinese patent application with an application date of October 30, 2020 and an application number of 202011192257.3, the entire contents of which are incorporated herein by reference.

technical field

The embodiments of the present application relate to the technical field of new energy trucks, for example, to a driving device, a driving method for a hybrid truck, and a hybrid truck.

Background technique

The working conditions of heavy-duty trucks include short-term transportation in mining areas, long-distance trunk line freight, construction machinery, and port transshipment. , need high-power drive; construction machinery mostly operates in ports, enterprises and logistics parks, with short transportation radius, complex road conditions, long operation time, and high requirements for the power of trucks; dock port transfers mostly work on fixed field lines, with a single trip. The distance is short, the cargo capacity is large, and the power requires low speed and high torque.

The existing pure electric centralized central drive form of new energy trucks generally requires at least 300kw/h of power, and the 300kw/h power battery has a dead weight of about 2 tons, and the battery capacity limits the continuous operation time of the vehicle. The size of the electric drive system with high power and high torque is very large in the new energy truck in the form of hybrid power, which is not conducive to the layout of the whole vehicle, and there is a clear sense of frustration when shifting gears.

SUMMARY OF THE INVENTION

Embodiments of the present application provide a driving device, a driving method for a hybrid truck, and a hybrid truck, which can handle the situation that the new energy truck is difficult to meet the truck's demand for high torque.

In a first aspect, an embodiment of the present application provides a driving device, including:

Controller, engine, clutch, first motor, second motor, third motor, multi-speed gearbox, second gearbox and third gearbox; the engine is connected with the first motor through the clutch; the multi-speed gearbox is connected with the first motor The motor is directly connected; the engine is set to provide driving torque to the power output transmission mechanism of the truck; the first motor is set to provide driving torque to the traveling mechanism of the truck;

The second motor is directly connected to the second gearbox; the third motor is directly connected to the third gearbox;

The second motor is configured to provide driving torque to the running gear of the truck; the third motor is set to provide driving torque to the running gear of the truck;

The controller is respectively connected with the engine, the first motor, the second motor, the third motor, the clutch, the multi-speed gearbox, the second gearbox and the third gearbox, and the controller is set to receive the working mode signal, and according to the working mode The signal controls the output working state of the engine, the first motor, the second motor and the third motor, and respectively controls the multi-speed gearbox, the second gearbox and the third gearbox to switch gears.

Optionally, the driving device further includes: a final reducer;

The second gearbox and the third gearbox are respectively directly connected with the main reducer, and the second gearbox and the third gearbox are meshed with the gears of the final gearbox through the output gear; the final gearbox is set to decelerate the truck and increase the driving torque .

Optionally, the driving device further includes: a power battery system;

The power battery system is electrically connected with the first motor, the second motor and the third motor; the power battery system is configured to supply power to the first motor, the second motor and the third motor.

Optionally, the driving device further includes: a high-voltage power distribution box;

The power battery system is electrically connected with the first motor, the second motor and the third motor through the high voltage distribution box;

When the truck is driving, the power battery system supplies power to the first motor, the second motor and the third motor, and the first motor, the second motor and the third motor work in an electric state;

When the truck is braking, the power battery system does not supply power, and the vehicle drives the first motor, the second motor and the third motor to rotate. The first motor, the second motor and the third motor are in the power generation state, and output negative torque to assist braking And output current to the power battery system.

Optionally, the controller is set to:

In the low-speed start or low-speed running phase, the clutch is controlled to disengage, the engine is idling, and the first motor, the second motor or the third motor is controlled to output the driving torque independently;

In the middle and high speed stage, the control clutch is engaged, and the driving torque is output by the engine;

In the climbing stage, the clutch is controlled to disengage, the engine is idling, and the first motor, the second motor and the third motor are controlled to jointly output driving torque;

In the downhill or deceleration or braking stage, the clutch is controlled to disengage, the engine is idling, the first motor, the second motor and the third motor are controlled to recover braking energy, and the power battery system is charged.

Optionally, the working mode signal includes an electric drive mode signal, a power generation mode signal, an engine mode signal, a combined drive mode signal, and an energy recovery mode signal;

The controller is set to:

When the working mode signal is the electric drive mode signal, the clutch is controlled to disengage and the engine is idling; and the first motor is controlled to output the driving torque, or the first motor, the second motor and the third motor are controlled to output the driving torque;

When the working mode signal is the power generation mode signal, the engine is controlled to output the driving torque to the optimal operating point of the rotational speed, and the clutch is controlled to be engaged, and the first motor is controlled to enter the feeding state to charge the power battery system;

When the working mode signal is the engine mode signal, the control clutch is engaged, and the engine outputs the driving torque;

When the working mode signal is the combined driving mode signal, the clutch is controlled to be combined, and the engine is controlled to output the coupling torque with the first motor, the second motor and the third motor;

When the working mode signal is an energy recovery mode signal, the first motor, the second motor and the third motor are controlled to enter a feeding state to charge the power battery system.

In a second aspect, the embodiments of the present application further provide a method for driving a hybrid truck,

The hybrid truck includes: a controller, an engine, a clutch, a first motor, a second motor, a third motor, a multi-speed gearbox, a second gearbox and a third gearbox; the engine is connected with the first motor through the clutch; multi-speed The gearbox is directly connected to the first motor; the second motor is directly connected to the second gearbox; the third motor is directly connected to the third gearbox; the controller is respectively connected to the engine, the first motor, the second motor, the third motor and the clutch , the multi-speed gearbox, the second gearbox and the third gearbox are connected;

The method includes:

The controller receives the working mode signal, and controls the engine, the first motor, the second motor, and the third motor to output the working state according to the working mode signal, and controls the multi-speed gearbox, the second gearbox and the The third gearbox switches gears.

Optionally, in a low-speed start or low-speed running phase, the controller controls the clutch to be disengaged, the engine idles, and controls the first motor, the second motor or the third motor to output driving torque independently;

In the middle and high speed stage, the controller controls the clutch engagement, and the driving torque is output by the engine;

In the climbing stage, the controller controls the clutch disengagement, the engine idle speed, and controls the first motor, the second motor and the third motor to jointly output the driving torque;

In the downhill or deceleration or braking stage, the controller controls the clutch disengagement, the engine idle speed, controls the first motor, the second motor and the third motor for braking energy recovery, and charges the power battery system of the hybrid truck.

Optionally, when the working mode signal is the electric drive mode signal, the controller controls the clutch to disengage and the engine idles; and controls the first motor to output the drive torque, or controls the first motor, the second motor and the third motor to output the drive torque;

When the working mode signal is the power generation mode signal, the controller controls the engine to output the driving torque to the optimal operating point of the rotational speed, and controls the clutch engagement, and controls the first motor to enter the feeding state to charge the power battery system of the hybrid truck;

When the working mode signal is the engine mode signal, the controller controls the clutch engagement, and the engine outputs the driving torque;

When the working mode signal is the combined driving mode signal, the controller controls the clutch to be combined, and controls the output coupling torque between the engine and the first motor, the second motor and the third motor;

When the working mode signal is an energy recovery mode signal, the controller controls the first motor, the second motor and the third motor to enter a feeding state to charge the power battery system of the hybrid truck.

In a third aspect, an embodiment of the present application further provides a hybrid truck, including the drive device described in the first aspect.

Description of drawings

1 is a schematic structural diagram of a driving device provided by an embodiment of the present application;

2 is a schematic structural diagram of another driving device provided by an embodiment of the present application;

3 is a schematic structural diagram of another driving device provided by an embodiment of the present application;

4 is a schematic structural diagram of another driving device provided by an embodiment of the present application;

5 is a schematic structural diagram of another driving device provided by an embodiment of the present application;

FIG. 6 is a schematic structural diagram of a hybrid truck provided by an embodiment of the present application.

Detailed ways

FIG. 1 is a schematic structural diagram of a driving device provided by an embodiment of the present application. Referring to FIG. 1 , a drive device 100 provided by an embodiment of the present application includes a controller 1 , an engine 2 , a clutch 3 , a first motor 4 , a second motor 5 , a third motor 6 , a multi-speed gearbox 7 , and a second gearbox 8 And the third gearbox 9, the engine 2 is connected with the first motor 4 through the clutch 3, the multi-speed gearbox 7 is directly connected with the first motor 4, the engine 2 is arranged to provide driving torque to the power output transmission mechanism of the truck, and the first motor 4 is set to provide driving torque to the running gear of the truck, the second motor 5 is directly connected to the second gearbox 8, the third motor 6 is directly connected to the third gearbox 9, and the second motor 5 is set to provide the running gear of the truck. Driving torque, the third motor 6 is set to provide driving torque to the traveling mechanism of the truck, and the controller 1 is respectively connected with the engine 2, the first motor 4, the second motor 5, the third motor 6, the clutch 3, the multi-speed gearbox 7, The second gearbox 8 and the third gearbox 9 are connected, and the controller 1 is configured to receive the working mode signal and control the engine 2, the first motor 4, the second motor 5 and the third motor 6 to output the working state according to the working mode signal. , and respectively control the multi-speed gearbox 7, the second gearbox 8 and the third gearbox 9 to switch gears.

Exemplarily, the engine 2 may be a multi-source internal combustion engine such as diesel, gasoline or natural gas, and the working mode signal may include an electric drive mode signal, a power generation mode signal, an engine mode signal, a combined drive mode signal, and an energy recovery mode signal. The engine 2 The working states of the first motor 4, the second motor 5 and the third motor 6 include the output driving torque state, the feeding state and the auxiliary braking state. The traveling mechanism may include wheels, the power output transmission mechanism may include an output shaft of the engine, and the driving torque output by the engine is transmitted to the wheels through the power output transmission mechanism to drive the vehicle forward. The controller 1 receives the working mode signal, and according to the working mode signal, controls the engine 2, the first motor 4, the second motor 5, and the third motor 6 to output the working state in the corresponding working mode, and controls the multi-speed gearbox 7 respectively. , the second gearbox 8 and the third gearbox 9 to switch gears.

In the drive device 100 provided in this embodiment, the engine 2, the clutch 3 and the first motor 4 constitute a set of power systems to provide driving torque to the transmission mechanism of the truck, or, through the first motor 4 or the engine 2, respectively, to the running mechanism of the truck independently Provide driving torque, the second motor 5, the third motor 6, the second gearbox 8 and the third gearbox 9 constitute a set of power systems to provide driving torque to the traveling mechanism of the truck, and the two sets of power systems can respectively supply the traveling mechanism of the truck. Provide driving torque, or two sets of power systems can jointly provide driving torque to the traveling mechanism of the truck, and can provide a larger output torque to drive the vehicle. The controller 1 receives the working mode signal, and according to the working mode signal, controls the engine 2, the first The first motor 4, the second motor 5, and the third motor 6 output the working state, and respectively control the multi-speed gearbox 7, the second gearbox 8 and the third gearbox 9 to switch gears, which solves the difficulty of existing new energy trucks. The problem of meeting the truck's demand for high torque.

Optionally, FIG. 2 is a schematic structural diagram of another driving device provided by an embodiment of the present application. On the basis of the above-mentioned embodiment, referring to FIG. 2 , the driving device 100 further includes a final gearbox 10 , the second gearbox 8 and the third gearbox 9 are directly connected with the final gearbox 10 , and the second gearbox 8 and the third gearbox 9 are respectively directly connected to the final gearbox 10 . The gearbox 9 meshes with the gears of the final drive 10 through the output gear, which is arranged to slow down the truck and increase the drive torque.

Exemplarily, the final gear 10 decelerates the truck through the cooperation of the second gearbox 8 and the third gearbox 9 to realize active braking of the truck, decelerate the truck and increase the driving torque. The second motor 5 provides torque to the second gearbox 8, the third motor 6 provides torque to the third gearbox 9, the second gearbox 8 and the third gearbox 9 transmit the torque to the final gearbox 10, the final gearbox 10 The transmission is then transmitted via the differential to the undercarriage, which can be, for example, wheels.

Optionally, FIG. 3 is a schematic structural diagram of another driving device provided by an embodiment of the present application. On the basis of the above-mentioned embodiment, referring to FIG. 3 , the driving device 100 further includes a power battery system 11 . The power battery system 11 is electrically connected to the first motor 4 , the second motor 5 and the third motor 6 , and the power battery system 11 is configured as Power is supplied to the first motor 4 , the second motor 5 and the third motor 6 .

The power battery system 11 provides the electrical energy required by the first motor 4 , the second motor 5 and the third motor 6 .

Optionally, FIG. 4 is a schematic structural diagram of another driving device provided by an embodiment of the present application. FIG. 5 is a schematic structural diagram of another driving device provided by an embodiment of the present application. On the basis of the above embodiment, with reference to FIG. 4 and FIG. 5 , the driving device 100 further includes a high-voltage power distribution box 12 , and the power battery system 11 communicates with the first motor 4 , the second motor 5 and the third motor through the high-voltage power distribution box 12 . 6. Electrical connection, when the truck is running, the power battery system 11 supplies power to the first motor 4, the second motor 5 and the third motor 6, and the first motor 4, the second motor 5 and the third motor 6 work in an electric state; When braking, the power battery system 11 does not supply power, the vehicle drives the first motor 4, the second motor 5 and the third motor 6 to rotate, the first motor 4, the second motor 5 and the third motor 6 are in the power generation state, and the output The negative torque assists braking and outputs current to the power battery system 11 .

Among them, when the truck is driving, the high-voltage power distribution box 12 plays a role in reducing the voltage and power distribution, and the high-voltage power distribution box 12 reduces the voltage and distributes the electric energy provided by the power battery system 11, so as to pass the high-voltage power distribution box 12 to the first motor 4, The second motor 5 and the third motor 6 are powered; when the truck is braking, the vehicle drives the first motor 4, the second motor 5 and the third motor 6 to rotate, and the first motor 4, the second motor 5 and the third motor 6 are In the power generation state, the electric energy generated by the first motor 4 , the second motor 5 and the third motor 6 passes through the high-voltage power distribution box 12 to store the energy in the power battery system 11 to realize braking energy recovery. In addition, the first motor 4. The second motor 5 and the third motor 6 output negative torque to assist braking, which can also reduce the wear of the braking system.

Optionally, on the basis of the above embodiment, continue to refer to FIG. 4 , the controller 1 is configured to control the clutch 3 to disengage, the engine 2 to idle, and to control the first motor 4 and the second motor 5 during the low-speed start or low-speed running stage. Or the third motor 6 outputs the driving torque alone; in the middle and high speed stage, the control clutch 3 is engaged, and the driving torque is output by the engine 2; in the climbing stage, the control clutch 3 is disengaged, the engine 2 is idling, and the first motor 4 and the second motor are controlled. 5 and the third motor 6 jointly output driving torque; and in the downhill or deceleration or braking stage, the clutch 3 is controlled to disengage, the engine 2 is idling, and the first motor 4 and the second motor 5 and the third motor 6 are controlled to recover braking energy, Charge the power battery system 11 .

Exemplarily, on the basis of the above-mentioned embodiment, and continuing to refer to FIG. 4 , in the low-speed starting stage, the controller 1 controls the clutch 3 to disengage, the engine 2 idles, and the controller 1 controls the first motor 4 , the second motor 5 or the third motor 5 . The motor 6 outputs the driving torque alone. In the low-speed driving stage, the controller 1 controls the clutch 3 to disengage, the engine 2 idles, and the controller 1 controls the first motor 4, the second motor 5 or the third motor 6 to output the driving torque alone, avoiding the engine. 2. The low-efficiency range at low speed saves diesel consumption.

In the medium and high speed stage, the controller 1 controls the clutch 3 to engage, and the engine 2 outputs the driving torque. At this time, the engine 2 works in the high-efficiency stage. If the power demand of the truck is strong, the second motor 5 and the third motor 6 provide assistance. The excess torque of the engine 2 is set to drive the second motor 5 and the third motor 6 to generate electricity, and to charge the power battery system 11 .

In the climbing stage, the controller 1 controls the clutch 3 to disengage, the engine 2 idles, and the controller 1 controls the first motor 4, the second motor 5 and the third motor 6 to jointly output driving torque, avoiding the low-efficiency interval of the engine 2 at low speed , the driving torque is output by the first motor 4, the second motor 5 and the third motor 6 to save diesel consumption. If the truck has a strong demand for power, the controller 1 controls the clutch 3 to engage, and the engine 2 intervenes to assist the first motor 4 , the second motor 5 and the third motor 6 to provide power.

In the downhill stage, the controller 1 controls the clutch 3 to disengage, the engine 2 idles, and the controller 1 controls the first motor 4 , the second motor 5 and the third motor 6 to recover braking energy and charge the power battery system 11 . In the deceleration stage, the controller 1 controls the clutch 3 to disengage, the engine 2 idles, and controls the first motor 4 , the second motor 5 and the third motor 6 to recover braking energy and charge the power battery system 11 . In the braking stage, the controller 1 controls the clutch 3 to disengage, the engine 2 idles, and controls the first motor 4, the second motor 5 and the third motor 6 to recover braking energy, charge the power battery system 11, and realize the reduction of braking energy. recycling, reducing energy loss.

Optionally, on the basis of the above embodiment, continue to refer to FIG. 4 , when the working mode signal is the electric drive mode signal, the controller 1 is set to: control the clutch 3 to disengage, the engine 2 is idling, and control the first motor 4 to output the drive. torque, or control the first motor 4 , the second motor 5 and the third motor 6 to output driving torque.

Wherein, when the working mode signal is an electric drive mode signal, the entry conditions may include that the motor system is not faulty, the remaining battery power is greater than a safe value, and the vehicle speed is less than a set value. The truck starts with the first motor 4 outputting driving torque preferentially. At this time, the clutch 3 is disengaged and the engine 2 is idling. The driver steps on the accelerator pedal, the first motor 4, the second motor 5 and the third motor 6 jointly output the driving torque or the first motor 4 outputs the driving torque, in response to the torque demand of the truck, to drive the truck forward until the set value is reached. When the electric drive mode exits the condition, the controller 1 controls the clutch 3 to engage to exit the electric drive mode. Among them, the exit conditions of the electric drive mode include that the remaining battery power is less than the safe value, or the vehicle speed reaches the set value, that is, the vehicle speed reaches the high-efficiency vehicle speed range of the engine 2, or the motor system fails, or the condition of the combined drive mode is reached, and the combined drive mode is entered. .

Optionally, on the basis of the above embodiment, continue to refer to FIG. 4 , when the working mode signal is the power generation mode signal, the controller 1 is set to control the engine 2 to output the driving torque to the optimal operating point of the rotational speed, and control the clutch 3 to engage, The first motor 4 is controlled to enter a feeding state to charge the power battery system 11 .

The power battery system 11 includes a battery. When the working mode signal is a power generation mode signal, the entry conditions may include that the remaining battery power is less than a safe value, the engine 2 is in an inefficient working area, the motor system is faultless, and the remaining battery power is less than 98%. The output torque of the engine 2 is increased to the optimal operating point of the current speed, the clutch 3 is engaged, and the first motor 4 is driven to enter a feeding state to charge the power battery system 11 . The exit conditions of the power generation mode include meeting the conditions of the combined driving mode, entering the combined driving mode, or the remaining battery power is greater than 98%, or the current engine 2 torque is in the high-efficiency area or the motor system is faulty, or the vehicle speed is less than the set value and the remaining battery power is greater than Safe value.

Optionally, on the basis of the above embodiment, continue to refer to FIG. 4 , when the working mode signal is the engine mode signal, the controller 1 is set to control the clutch 3 to engage, and the engine 2 outputs the driving torque.

Wherein, when the working mode signal is the engine mode signal, the entry conditions may include that the remaining battery power is greater than the set value, the vehicle speed is greater than the set value, the engine 2 is in the high-efficiency working area, and the motor system is faulty. When the driving torque required by the truck is within the optimal working area of the engine 2, the engine 2 alone responds to the request of the accelerator pedal. The exit conditions of the engine mode include meeting the conditions of the combined drive mode to enter the combined drive mode, or meeting the conditions of the power generation mode to enter the power generation mode, or the vehicle speed is less than the set value and the remaining battery power is greater than the safe value and the motor system is not faulty, exit to the electric drive mode. .

Optionally, on the basis of the above embodiment, continue to refer to FIG. 4 , when the working mode signal is the combined driving mode signal, the controller 1 is set to control the clutch 3 to be combined, and to control the engine 2 and the first motor 4 and the second motor. 5 and the third motor 6 output coupling torque.

Wherein, when the working mode signal is the combined driving mode signal, the entry condition may include that the remaining battery power is greater than a safe value and the motor system is not faulty. According to the demand of vehicle power performance, make the first motor 4, the second motor 5, the third motor 6 and the engine 2 work at the same time, so that the motors can provide additional power and ensure the power of the truck. The combined driving mode exit conditions may include exiting the combined driving mode to the power generation mode if the combined driving mode is not satisfied and the remaining battery power is less than the set value and the motor system is not faulty; if the combined driving mode is not satisfied and the remaining battery power is greater than a safe value or If the motor system fails, exit to engine mode.

Optionally, on the basis of the above embodiment, continue to refer to FIG. 4, when the working mode signal is the energy recovery mode signal, the controller 1 is set to control the first motor 4, the second motor 5 and the third motor 6 to enter the feeding state to charge the power battery system 11 .

Among them, when the working mode signal is the energy recovery mode signal, the entry conditions may include that the battery power is less than 98%, the accelerator pedal is not depressed, and the vehicle speed is greater than the set value, according to the brake pedal opening and the torque output to the motor, the motor enters In the feeding state, the power battery system 11 is charged.

During braking, the controller 1 controls the clutch 3 to disengage, so that the first motor 4, the second motor 5 and the third motor 6 assist in braking, and the motor braking and mechanical braking can be performed in a superimposed manner.

Optionally, on the basis of the above-mentioned embodiment, and continuing to refer to FIG. 4 , the first motor 4 may be a disc motor, and the second motor 5 and the third motor 6 are hairpin-type motors. Compared with the existing column motor, the disc motor has a flatter shape, a shorter axial dimension and a higher torque density, and the hairpin column motor has a higher power density and a smaller circumferential dimension. In this embodiment, a high-power hybrid power system is formed in the form of a disc motor combined with an engine 2 and a hairpin motor to reduce the structural size of the power system, and the first motor 4 , the second motor 5 and the third motor 6 control strategy and output power distribution to solve the problem that the existing new energy trucks are difficult to meet the truck's demand for large torque.

The drive device 100 provided in the embodiment of the present application includes a controller 1, an engine 2, a clutch 3, a first motor 4, a second motor 5, a third motor 6, a multi-speed gearbox 7, a second gearbox 8, and a third speed change The box 9, the engine 2, the clutch 3 and the first motor 4 constitute a power system to provide driving torque to the transmission mechanism of the truck, or provide driving torque to the traveling mechanism of the truck through the first motor 4 or the engine 2 respectively, and the second The motor 5, the third motor 6, the second gearbox 8 and the third gearbox 9 constitute a power system to provide driving torque to the traveling mechanism of the truck. The controller 1 receives the working mode signal and controls the engine 2 according to the working mode signal. , the first motor 4, the second motor 5, and the third motor 6 output the working state, and respectively control the multi-speed gearbox 7, the second gearbox 8 and the third gearbox 9 to switch gears, which solves the problem of existing new energy It is difficult for the truck to meet the truck's demand for high torque.

Embodiments of the present application provide a driving method for a hybrid truck. On the basis of the above embodiment, continue to refer to FIG. 4 , the hybrid truck includes a controller 1, an engine 2, a clutch 3, a first motor 4, a second motor 5, a third motor 6, a multi-speed gearbox 7, The second gearbox 8 and the third gearbox 9; the engine 2 is connected to the first motor 4 through the clutch 3; the multi-speed gearbox 7 is directly connected to the first motor 4; the second motor 5 is directly connected to the second gearbox 8; The third motor 6 is directly connected to the third gearbox 9; the controller 1 is respectively connected to the engine 2, the first motor 4, the second motor 5, the third motor 6, the clutch 3, the multi-speed gearbox 7, and the second gearbox 8 And the third gearbox 9 is connected.

The driving method of the hybrid truck provided by this embodiment includes:

The controller 1 receives the working mode signal, and according to the working mode signal, controls the engine 2, the first motor 4, the second motor 5, and the third motor 6 to output the working state, and controls the multi-speed gearbox 7 and the second gearbox 8 respectively. And the third gearbox 9 switches gears.

Optionally, on the basis of the above embodiment, continue to refer to FIG. 4 , in the low-speed start or low-speed running stage, the controller 1 controls the clutch 3 to disengage, the engine 2 idles, and controls the first motor 4, the second motor 5 or the third motor. The motor 6 outputs the drive torque alone.

In the middle and high speed stage, the controller 1 controls the clutch 3 to engage, and the engine 2 outputs the driving torque.

In the climbing stage, the controller 1 controls the clutch 3 to disengage, the engine 2 idles, and controls the first motor 4, the second motor 5 and the third motor 6 to jointly output driving torque.

In the downhill or deceleration or braking stage, the controller 1 controls the clutch 3 to disengage, the engine 2 idles, and controls the first motor 4 , the second motor 5 and the third motor 6 to recover braking energy and charge the power battery system 11 .

Optionally, on the basis of the above embodiment, continue to refer to FIG. 4, when the working mode signal is the electric drive mode signal, the controller 1 controls the clutch 3 to disengage, the engine 2 idles; and controls the first motor 4 to output the drive torque, or The first motor 4, the second motor 5 and the third motor 6 are controlled to output driving torque.

When the working mode signal is the power generation mode signal, the controller 1 controls the engine 2 to output the driving torque to the optimal operating point of the rotational speed, controls the clutch 3 to engage, and controls the first motor 4 to enter the feeding state to charge the power battery system 11 .

When the working mode signal is the engine mode signal, the controller 1 controls the clutch 3 to engage, and the engine 2 outputs the driving torque.

When the working mode signal is the combined driving mode signal, the controller 1 controls the clutch 3 to engage, and controls the engine 2 to output the coupling torque with the first motor 4 , the second motor 5 and the third motor 6 .

When the working mode signal is the energy recovery mode signal, the controller 1 controls the first motor 4 , the second motor 5 and the third motor 6 to enter a feeding state to charge the power battery system 11 .

The driving method of the hybrid truck provided in this embodiment includes: the controller 1 receives the working mode signal, and controls the engine 2, the first motor 4, the second motor 5 and the third motor 6 to output the working state according to the working mode signal. It realizes the hybrid power output for hybrid trucks, and the output meets the torque requirements of different working modes of hybrid trucks, and meets the requirements of hybrid trucks for clean, pollution-free and large driving torque.

Optionally, FIG. 6 is a schematic structural diagram of a hybrid truck provided by an embodiment of the present application. Referring to FIG. 6 , the hybrid truck 200 provided by the embodiment of the present invention includes the drive device 100 described in any of the foregoing embodiments, and has the beneficial effects of the drive device 100 described in any of the foregoing embodiments, which will not be repeated here.

Claims

A drive device (100), comprising: a controller (1), an engine (2), a clutch (3), a first motor (4), a second motor (5), a third motor (6), a multi-speed transmission a box (7), a second gearbox (8) and a third gearbox (9);

Wherein, the engine (2) is connected with the first motor (4) through the clutch (3); the multi-speed gearbox (7) is directly connected with the first motor (4); the engine (2) is arranged to The power output transmission mechanism of the truck provides driving torque; the first motor (4) is arranged to provide driving torque to the running gear of the truck;

The second motor (5) is directly connected to the second gearbox (8); the third motor (6) is directly connected to the third gearbox (9);

The second motor (5) is arranged to provide driving torque to the running gear of the truck; the third motor (6) is arranged to provide driving torque to the running gear of the truck;

The controller (1) is respectively connected with the engine (2), the first motor (4), the second motor (5), the third motor (6), the clutch (3), The multi-speed gearbox (7), the second gearbox (8) and the third gearbox (9) are connected, and the controller (1) is configured to: receive a working mode signal and, according to the The working mode signal controls the engine (2), the first motor (4), the second motor (5), and the third motor (6) to output the working state, and respectively controls the multi-speed transmission The box (7), the second gearbox (8) and the third gearbox (9) switch gears.
The drive device (100) according to claim 1, further comprising: a final reducer (10);

The second gearbox (8) and the third gearbox (9) are respectively directly connected to the main reducer (10), the second gearbox (8) and the third gearbox (9) ) meshes with the gears of the final drive (10) through an output gear; the final drive (10) is arranged to slow down the truck and increase drive torque.
The drive device (100) according to claim 2, further comprising: a power battery system (11);

The power battery system (11) is electrically connected to the first motor (4), the second motor (5) and the third motor (6); the power battery system (11) is configured to The first motor (4), the second motor (5) and the third motor (6) are powered.
The drive device (100) according to claim 3, further comprising: a high-voltage power distribution box (12);

The power battery system (11) is electrically connected to the first motor (4), the second motor (5) and the third motor (6) through the high-voltage power distribution box (12);

When the truck is running, the power battery system (11) supplies power to the first motor (4), the second motor (5) and the third motor (6), and the first motor ( 4), the second motor (5) and the third motor (6) work in an electric state;

When the truck is braking, the power battery system (11) does not supply power, and the vehicle drives the first motor (4), the second motor (5) and the third motor (6) to rotate, so the The first motor (4), the second motor (5) and the third motor (6) are in a power generation state to output negative torque to assist braking, and output current to the power battery system (11).
The drive device (100) according to claim 4, wherein the controller (1) is arranged to:

In the low-speed starting or low-speed running phase, the clutch (3) is controlled to disengage, the engine (2) is idling, and the first motor (4), the second motor (5) or the third motor ( 6) Independent output driving torque;

In the middle and high speed stage, the clutch (3) is controlled to be engaged, and the engine (2) outputs the driving torque;

In the climbing stage, the clutch (3) is controlled to disengage, the engine (2) is idling, and the first motor (4), the second motor (5) and the third motor (6) are controlled together output drive torque;

In the downhill or deceleration or braking phase, the clutch (3) is controlled to disengage, the engine (2) is idling, the first motor (4) and the second motor (5) and the third motor ( 6) Recover braking energy to charge the power battery system (11).
The drive device (100) according to claim 3, wherein,

The working mode signal includes an electric drive mode signal, a power generation mode signal, an engine mode signal, a combined drive mode signal and an energy recovery mode signal;

The controller (1) is set to:

When the working mode signal is an electric drive mode signal, the clutch (3) is controlled to disengage and the engine (2) is idling; and the first motor (4) is controlled to output driving torque, or the first motor is controlled (4), the second motor (5) and the third motor (6) output driving torque;

When the working mode signal is a power generation mode signal, the engine (2) is controlled to output a driving torque at an optimal operating point of rotation speed, and the clutch (3) is controlled to engage, and the first motor (4) is controlled to enter the feeding The state is charging the power battery system (11);

When the working mode signal is an engine mode signal, the clutch (3) is controlled to be engaged, and the engine (2) outputs a driving torque;

When the working mode signal is a combined driving mode signal, the clutch (3) is controlled to be engaged, and the engine (2) is controlled with the first motor (4), the second motor (5) and the The third motor (6) outputs coupling torque;

When the working mode signal is an energy recovery mode signal, the first motor (4), the second motor (5) and the third motor (6) are controlled to enter a feeding state, which is the power battery system (11) CHARGE.
A driving method of a hybrid truck, wherein,

The hybrid truck comprises: a controller (1), an engine (2), a clutch (3), a first motor (4), a second motor (5), a third motor (6), and a multi-speed gearbox (7). ), a second gearbox (8) and a third gearbox (9); the engine (2) is connected to the first motor (4) through the clutch (3); the multi-speed gearbox (7) ) is directly connected to the first motor (4); the second motor (5) is directly connected to the second gearbox (8); the third motor (6) is directly connected to the third gearbox ( 9) Directly connected; the controller (1) is respectively connected with the engine (2), the first motor (4), the second motor (5), the third motor (6), the The clutch (3), the multi-speed gearbox (7), the second gearbox (8) and the third gearbox (9) are connected;

The method includes:

The controller (1) receives a working mode signal, and controls the engine (2), the first motor (4), the second motor (5), and the third motor according to the working mode signal The motor (6) outputs the working state, and controls the multi-speed gearbox (7), the second gearbox (8) and the third gearbox (9) to switch gears respectively.
The method of claim 7, wherein,

In a low-speed start or low-speed running phase, the controller (1) controls the clutch (3) to disengage, the engine (2) idles, and controls the first motor (4) and the second motor (5) Or the third motor (6) outputs driving torque alone;

In the middle and high speed stage, the controller (1) controls the clutch (3) to engage, and the engine (2) outputs driving torque;

In the climbing stage, the controller (1) controls the clutch (3) to disengage, the engine (2) idles, controls the first motor (4) and the second motor (5) and the The third motor (6) jointly outputs the driving torque;

During downhill or deceleration or braking phases, the controller (1) controls the clutch (3) to disengage, the engine (2) idles, and controls the first motor (4) and the second motor (5) And the third motor (6) performs braking energy recovery to charge the power battery system (11) of the hybrid truck.
The method of claim 7, wherein,

When the working mode signal is an electric drive mode signal, the controller (1) controls the clutch (3) to disengage, the engine (2) idles; and controls the first motor (4) to output drive torque, Or control the first motor (4), the second motor (5) and the third motor (6) to output driving torque;

When the working mode signal is a power generation mode signal, the controller (1) controls the engine (2) to output a driving torque at an optimal operating point of rotational speed, and controls the clutch (3) to engage, and controls the first The motor (4) enters a feeding state to charge the power battery system (11) of the hybrid truck;

When the working mode signal is an engine mode signal, the controller (1) controls the clutch (3) to engage, and the engine (2) outputs a driving torque;

When the working mode signal is a combined driving mode signal, the controller (1) controls the clutch (3) to be engaged, and controls the engine (2), the first motor (4), the second motor (4) and the second motor (4). The motor (5) and the third motor (6) output coupling torque;

When the working mode signal is an energy recovery mode signal, the controller (1) controls the first motor (4), the second motor (5) and the third motor (6) to enter a feeding state , charging the power battery system (11) of the hybrid truck.
A hybrid truck (200), comprising the drive device (100) according to any one of claims 1 to 6.