A hybrid power roller and its control method

Abstract

This invention discloses a hybrid power roller and its control method. The hybrid power roller includes an engine, a hydraulic drive pump, a hydraulic vibration pump, a rear axle hydraulic drive motor, a steel wheel hydraulic drive motor, a hydraulic vibration motor, a machine controller, a motor, a hybrid controller, and a battery pack. The engine, hydraulic drive pump, hydraulic vibration pump, and motor are coaxially arranged and rigidly connected in sequence. The machine controller is communicatively connected to the engine, hydraulic drive pump, hydraulic vibration pump, rear axle hydraulic drive motor, steel wheel hydraulic drive motor, hydraulic vibration motor, and hybrid controller. The hybrid controller is connected to the battery pack and motor via wires. The hydraulic drive pump is connected to the rear axle hydraulic drive motor and the steel wheel hydraulic drive motor. The hydraulic vibration pump is connected to the hydraulic vibration motor.

Description

Technical Field

[0001] This invention relates to a hybrid power roller and its control method, belonging to the field of roller technology. Background Technology

[0002] The power output and actuator of a conventional road roller, such as Figure 1 As shown, engine 1, hydraulic drive pump 2, hydraulic vibration pump 3, rear axle hydraulic drive motor 4, steel wheel hydraulic drive motor 5, hydraulic vibration motor 6, and machine controller 7 are fixed in appropriate positions. The machine controller 7 communicates with engine 1, hydraulic drive pump 2, hydraulic vibration pump 3, rear axle hydraulic drive motor 4, steel wheel hydraulic drive motor 5, and hydraulic vibration motor 6, controlling them to perform corresponding actions such as engine starting, machine drive, and vibration of the working device. However, some problems often arise during use:

[0003] 1. The engine has difficulty starting in low-temperature and high-altitude environments;

[0004] 2. Under heavy load conditions, such as vibration conditions, when a road roller climbs a slope, the engine speed often decreases, which in turn leads to a decrease in vibration frequency and affects the construction quality.

[0005] 3. With increasingly stringent emission standards, when an engine exceeds a certain rated power, it is necessary to add urea and SCR systems to meet emission requirements. However, this will increase the workload of adding urea to the equipment every day for the user.

[0006] 4. When the equipment is traveling downhill, there is a risk that the engine may be dragged backward. Summary of the Invention

[0007] To address the shortcomings of existing technologies, the present invention aims to provide a hybrid power roller and its control method, which solves the problems of difficult starting, high load, and susceptibility to reverse drag caused by single-engine technology.

[0008] To achieve the above objectives, the present invention adopts the following technical solution:

[0009] A hybrid power roller includes an engine, a hydraulic drive pump, a hydraulic vibration pump, a rear axle hydraulic drive motor, a steel wheel hydraulic drive motor, a hydraulic vibration motor, a machine controller, a motor, a hybrid controller, and a battery pack.

[0010] The engine, hydraulic drive pump, hydraulic vibration pump, and motor are coaxially arranged and rigidly connected in sequence;

[0011] The overall controller is connected to the engine, hydraulic drive pump, hydraulic vibration pump, rear axle hydraulic drive motor, steel wheel hydraulic drive motor, hydraulic vibration motor, and hybrid controller for communication.

[0012] The hybrid controller is connected to the battery pack and the motor via wires.

[0013] The hydraulic drive pump is connected to the rear axle hydraulic drive motor and the steel wheel hydraulic drive motor, and the hydraulic vibration pump is connected to the hydraulic vibration motor.

[0014] Furthermore, the aforementioned hybrid power roller also includes a key switch, which is connected to the machine controller and used to control the engine start.

[0015] Furthermore, the aforementioned hybrid power roller also includes a hydraulic drive system pressure sensor and a hydraulic vibration system pressure sensor. The hydraulic drive system pressure sensor and the hydraulic vibration system pressure sensor are connected to the machine controller. The hydraulic drive system pressure sensor and the hydraulic vibration system pressure sensor are used to detect the pressure of the hydraulic drive system and the hydraulic vibration system, respectively.

[0016] Furthermore, the aforementioned hybrid power roller also includes an electric control handle, a speed sensor, and a buzzer. The electric control handle, speed sensor, and buzzer are connected to the overall machine controller, and the speed sensor is used to detect the overall machine speed.

[0017] Furthermore, the aforementioned hybrid power roller also includes an engine radiator, a hydraulic oil radiator, an engine radiator fan, a hydraulic oil radiator fan, an engine water temperature sensor, and a hydraulic oil temperature sensor. The engine radiator fan, hydraulic oil radiator fan, engine water temperature sensor, and hydraulic oil temperature sensor are connected to the machine controller. The engine radiator fan and hydraulic oil radiator fan are used to dissipate heat for the engine radiator and hydraulic oil radiator, respectively. The battery pack is installed on the windward side of the engine radiator and hydraulic oil radiator. The engine radiator fan and hydraulic oil radiator fan are motor-driven suction fans.

[0018] A control method for a hybrid power roller includes the following steps:

[0019] Receives the key switch start signal and controls the engine to start and enter the working state;

[0020] Real-time reading of engine speed values ​​transmitted by the engine ECU;

[0021] If the engine speed does not exceed n within time T seconds, it sends a command to the hybrid controller to control the motor to operate; if the engine speed is greater than n, the hybrid controller controls the motor to idle.

[0022] Furthermore, the aforementioned hybrid power roller control method also includes the following steps:

[0023] In operation, it receives real-time detection signals from the pressure sensors of the hydraulic drive system and the hydraulic vibration system.

[0024] If the sum of the values ​​detected by the hydraulic drive system pressure sensor and the hydraulic vibration system pressure sensor is greater than P, and the engine speed drops by more than n1 within time T1 seconds, a command is sent to the hybrid controller to control the motor to operate. If the sum of the values ​​detected by the hydraulic drive system pressure sensor and the hydraulic vibration system pressure sensor decreases to P1, the hybrid controller controls the motor to stop.

[0025] Furthermore, the aforementioned hybrid power roller control method also includes the following steps:

[0026] During operation, the engine speed and overall machine speed are received in real time.

[0027] If the engine speed exceeds the maximum permissible speed n2 and the overall speed exceeds the maximum permissible speed v, the control buzzer will emit an audible signal and simultaneously send a signal to the hybrid controller to control the motor to move in the opposite direction to the engine speed.

[0028] Furthermore, the aforementioned hybrid power roller control method also includes the following steps:

[0029] During operation, signals from the engine coolant temperature sensor and hydraulic oil temperature sensor are collected in real time.

[0030] When the collected engine coolant temperature and hydraulic oil temperature are higher than the set values, the engine radiator fan and hydraulic oil cooler fan are controlled to operate respectively to cool the engine radiator and hydraulic oil cooler.

[0031] Furthermore, the aforementioned hybrid power roller control method also includes the following steps:

[0032] If a radiator cleaning signal is received and the engine is not running, the engine radiator fan and hydraulic oil cooler fan will be reversed.

[0033] The beneficial effects achieved by this invention are as follows:

[0034] 1. By using an electric motor to assist in engine starting, the problem of difficulty in starting the engine in low-temperature and high-altitude environments can be solved;

[0035] 2. By using electric motor assistance, the problems of engine 1 turning off and the need to add urea under heavy loads are solved;

[0036] 3. By reversing the motor, the risk of the engine being dragged backward is eliminated;

[0037] 4. Individually control and separately cool the engine radiator and hydraulic oil radiator to reduce energy consumption. Attached Figure Description

[0038] Figure 1 This is a diagram showing the power output and actuator connection of a conventional road roller;

[0039] Figure 2 This is a diagram showing the power output and actuator connection of the road roller of the present invention;

[0040] Figure 3 This is a schematic diagram of the solution to the startup difficulty of this invention;

[0041] Figure 4 This is a schematic diagram of the solution to the rotation problem of the present invention;

[0042] Figure 5 This is a schematic diagram of the solution to the reaction and being dragged back by the present invention;

[0043] Figure 6 This is a schematic diagram of the battery pack and heat dissipation arrangement of the present invention;

[0044] Figure 7 This is a schematic diagram of the temperature control of the present invention.

[0045] The meanings of the reference numerals in the diagram are as follows: 1-Engine; 2-Hydraulic drive pump; 3-Hydraulic vibration pump; 4-Rear axle hydraulic drive motor; 5-Steel wheel hydraulic drive motor; 6-Hydraulic vibration motor; 7-Machine controller; 8-Motor; 9-Hybrid controller; 10-Battery pack; 11-Key switch; 12-Hydraulic drive system pressure sensor; 13-Hydraulic vibration system pressure sensor; 14-Electric control handle; 15-Speed ​​sensor; 16-Buzzer; 17-Engine radiator; 18-Hydraulic oil radiator; 19-Engine radiator fan; 20-Hydraulic oil radiator fan; 21-Engine coolant temperature sensor; 22-Hydraulic oil temperature sensor. Detailed Implementation

[0046] The technical solution of the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the embodiments and specific features in the embodiments are detailed descriptions of the technical solution of the present application, rather than limitations thereof. In the absence of conflict, the embodiments and technical features in the embodiments can be combined with each other.

[0047] Example 1

[0048] This embodiment discloses a hybrid power roller, whose power output and actuator are as follows: Figure 2As shown, it includes: engine 1, hydraulic drive pump 2, hydraulic vibration pump 3, rear axle hydraulic drive motor 4, steel wheel hydraulic drive motor 5, hydraulic vibration motor 6, whole machine controller 7, motor 8, hybrid controller 9, battery pack 10, key switch 11, hydraulic drive system pressure sensor 12, hydraulic vibration system pressure sensor 13, electric control handle 14, speed sensor 15, buzzer 16, engine radiator 17, hydraulic oil radiator 18, engine radiator fan 19, hydraulic oil radiator fan 20, engine water temperature sensor 21, and hydraulic oil temperature sensor 22.

[0049] The engine 1, hydraulic drive pump 2, hydraulic vibration pump 3, and motor 8 are coaxial and rigidly connected. The overall controller 7 communicates with the engine 1, hydraulic drive pump 2, hydraulic vibration pump 3, rear axle hydraulic drive motor 4, steel wheel hydraulic drive motor 5, hydraulic vibration motor 6, hybrid controller 9, key switch 11, hydraulic drive system pressure sensor 12, hydraulic vibration system pressure sensor 13, electric control handle 14, speed sensor 15, buzzer 16, engine radiator 17, hydraulic oil radiator 18, engine radiator fan 19, hydraulic oil radiator fan 20, engine water temperature sensor 21, and hydraulic oil temperature sensor 22. The hybrid controller 9 is connected to the battery pack 10 and motor 8 via wires. The hybrid controller 9 can output low-voltage DC power for use by low-voltage electrical appliances; it can convert the DC power output from the battery pack 10 into three-phase AC power to drive motor 8; when the engine 1 has surplus power, motor 8 is used as a generator, with the engine driving motor 8 to generate electricity, and the hybrid controller 9 converting the AC power generated by motor 8 into DC power to charge the battery pack 10. The hydraulic drive pump 2 is connected to the rear axle hydraulic drive motor 4 and the steel wheel hydraulic drive motor 5 via a hydraulic hose, driving the rear axle hydraulic drive motor 4 and the steel wheel hydraulic drive motor 5 to operate; the hydraulic vibration pump 3 is connected to the hydraulic vibration motor 6 via a hydraulic hose, and can drive the hydraulic vibration motor 6 to operate.

[0050] Example 2

[0051] This embodiment discloses a control method for a hybrid power roller, including the following scheme:

[0052] 1. Solve the problem of engine starting difficulties in low-temperature and high-altitude environments, the solution is as follows: Figure 3 As shown:

[0053] When the key switch 11 is turned, the whole machine controller 7 receives a signal and controls the starter motor of engine 1 to start the engine. During the starting process, if the speed of engine 1 does not exceed n within time T seconds, the whole machine controller 7 will send a command to the hybrid controller 9 to control the motor 8 to start the engine. When the whole machine controller 7 detects that the speed of engine 1 is greater than n, it controls the motor 8 to idle through the hybrid controller 9, and the motor 8 completes the task of assisting the engine 1 to start.

[0054] 2. Solve the problem of engine 1 turning off under heavy load and the need to add urea:

[0055] like Figure 4 As shown: The signals from hydraulic drive system pressure sensor 12 and hydraulic vibration system pressure sensor 13 are connected to the main controller 7 via wires. When engine 1 operates under heavy load, the pressure in the hydraulic system increases. When the main controller 7 detects that the sum of the values ​​detected by hydraulic drive system pressure sensor 12 and hydraulic vibration system pressure sensor 13 is greater than P, and the speed decreases by more than n1 within time T1 seconds, the main controller 1 communicates with the hybrid controller 9 to activate motor 8, providing power assistance to engine 1. When the sum of the pressures decreases to P1, motor 8 stops providing power assistance. Due to the intervention of motor 8, the required rated power of the engine is reduced. With proper matching, engine 1 can operate without urea and SCR systems, reducing user operating costs.

[0056] 3. Regarding the risk of the engine being towed backwards.

[0057] When the equipment is descending a slope, the motor may reverse-drive the pump, which in turn reverse-drives the engine, increasing the engine speed and causing the equipment speed to exceed the set speed. This could lead to a risk of the equipment going out of control. The solution to this problem is as follows:

[0058] like Figure 5 As shown: The whole machine controller 7 detects the signal from the electric control handle 14 and controls the engine 1, hydraulic drive pump 2, rear axle hydraulic drive motor 4, and steel wheel hydraulic drive motor 5 to perform corresponding actions. When the controller 7 detects that the speed of the engine 1 exceeds the maximum allowable speed n2 (the speed of the engine 1 is read by the engine ECU and transmitted to the whole machine controller 7), and the speed of the whole machine exceeds the maximum allowable speed v, the whole machine controller 7 controls the buzzer 16 to emit an audible signal to remind the user to operate the electric control handle 14. At the same time, it sends a signal to the hybrid controller 9. After receiving the signal, the hybrid controller 9 sends a signal to the motor 8 to control the motor 8 to move in the opposite direction to the speed of the engine 1, so that the engine 1 returns from the overspeed state to the set speed.

[0059] 4. Noise, heat dissipation, and energy-saving control

[0060] like Figure 6 ,7 As shown:

[0061] like Figure 6 As shown: the engine radiator 17 and the hydraulic oil radiator 18 form a radiator assembly installed in a suitable position on the roller frame. The battery pack 10 is installed on the windward side of the radiator assembly. The engine radiator fan 19 and the hydraulic oil radiator fan 20 are motor-driven suction fans that draw cold air from the outside through the battery pack 10 to cool the radiator assembly, thus meeting the temperature and airflow requirements of the battery pack 10.

[0062] The engine coolant temperature sensor 21, hydraulic oil temperature sensor 22, engine radiator fan 19, and hydraulic oil radiator fan 20 are all connected to the main controller 7 via wires. The main controller 7 collects the signals from the two sensors and controls the engine radiator fan 19 and hydraulic oil radiator fan 20 respectively according to the collected temperature values, adjusting their speeds. This avoids the problem of a single cooling fan simultaneously cooling both the hydraulic oil radiator and the engine radiator, which would prevent the equipment from operating within the closest temperature range and cause additional energy consumption.

[0063] When the detected temperature is lower than the set value, the cooling fan does not rotate, allowing the temperature to rise rapidly to the optimal operating range. Then, the whole machine controller 7 drives the fan to operate, keeping the engine water temperature and hydraulic oil temperature within the optimal temperature range, thus improving energy utilization.

[0064] Furthermore, when the controller 7 detects that the user has pressed the radiator cleaning button, and the engine 1 is not running, the controller 7 controls the engine radiator fan 19 and the hydraulic oil radiator fan 20 to reverse direction to blow air and clean the foreign objects accumulated on the radiator assembly, thereby cleaning the radiator and improving heat dissipation efficiency. Each fan reversal lasts for 1 minute to avoid prolonged fan operation and potential battery pack 10 depletion.

[0065] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A control method for a hybrid power roller, characterized in that, The hybrid power roller includes an engine (1), a hydraulic drive pump (2), a hydraulic vibration pump (3), a rear axle hydraulic drive motor (4), a steel wheel hydraulic drive motor (5), a hydraulic vibration motor (6), a machine controller (7), a motor (8), a hybrid controller (9), and a battery pack (10). The engine (1), hydraulic drive pump (2), hydraulic vibration pump (3), and motor (8) are coaxially arranged and rigidly connected in sequence. The machine controller (7) is communicatively connected to the engine (1), hydraulic drive pump (2), hydraulic vibration pump (3), rear axle hydraulic drive motor (4), steel wheel hydraulic drive motor (5), hydraulic vibration motor (6), and hybrid controller (9). The hybrid controller (9) is connected to the battery pack (10) and motor (8) through wires. The hydraulic drive pump (2) is connected to the rear axle hydraulic drive motor (4) and steel wheel hydraulic drive motor (5), and the hydraulic vibration pump (3) is connected to the hydraulic vibration motor (6). The hybrid power roller also includes a key switch (11), which is connected to the machine controller (7) and used to control the engine (1) to start; The hybrid power roller also includes an electric control handle (14), a speed sensor (15), and a buzzer (16). The electric control handle (14), speed sensor (15), and buzzer (16) are connected to the machine controller (7). The speed sensor (15) is used to detect the machine speed. The control method includes the following steps: receiving the start signal from the key switch (11) and controlling the engine (1) to start and enter the working state; reading the engine speed value transmitted by the engine ECU in real time; if the engine speed (1) does not exceed n within time T seconds, sending a command to the hybrid controller (9) to control the motor (8) to operate; if the engine speed (1) is greater than n, controlling the motor (8) to idle through the hybrid controller (9); It also includes the following steps: In the working state, the engine (1) speed and the whole machine speed are received in real time; if the engine (1) speed exceeds the maximum allowable speed n2 and the whole machine speed exceeds the maximum allowable speed v, the buzzer (16) is controlled to emit a sound signal, and at the same time a signal is sent to the hybrid controller (9) to control the motor (8) to move in the opposite direction to the engine (1) speed.

2. The hybrid power roller control method according to claim 1, characterized in that, The hybrid power roller also includes a hydraulic drive system pressure sensor (12) and a hydraulic vibration system pressure sensor (13). The hydraulic drive system pressure sensor (12) and the hydraulic vibration system pressure sensor (13) are connected to the whole machine controller (7). The hydraulic drive system pressure sensor (12) and the hydraulic vibration system pressure sensor (13) are used to detect the pressure of the hydraulic drive system and the hydraulic vibration system, respectively.

3. The hybrid power roller control method according to claim 1, characterized in that, The hybrid power roller also includes an engine radiator (17), a hydraulic oil radiator (18), an engine radiator fan (19), a hydraulic oil radiator fan (20), an engine water temperature sensor (21), and a hydraulic oil temperature sensor (22). The engine radiator fan (19), the hydraulic oil radiator fan (20), the engine water temperature sensor (21), and the hydraulic oil temperature sensor (22) are connected to the machine controller (7). The engine radiator fan (19) and the hydraulic oil radiator fan (20) are used to dissipate heat from the engine radiator (17) and the hydraulic oil radiator (18), respectively. The battery pack (10) is installed on the windward side of the engine radiator (17) and the hydraulic oil radiator (18). The engine radiator fan (19) and the hydraulic oil radiator fan (20) are motor-driven suction fans.

4. The hybrid power roller control method according to claim 2, characterized in that, The following steps are also included: In the working state, the detection value signals of the hydraulic drive system pressure sensor (12) and the hydraulic vibration system pressure sensor (13) are received in real time; if the sum of the detection values ​​of the hydraulic drive system pressure sensor (12) and the hydraulic vibration system pressure sensor (13) is greater than P, and the engine speed drops more than n1 within time T1 seconds, an instruction is sent to the hybrid controller (9) to control the motor (8) to operate; if the sum of the detection values ​​of the hydraulic drive system pressure sensor (12) and the hydraulic vibration system pressure sensor (13) decreases to P1, the motor (8) is stopped by the hybrid controller (9).

5. The hybrid power roller control method according to claim 3, characterized in that, The following steps are also included: In the working state, the signals of the engine water temperature sensor (21) and hydraulic oil temperature sensor (22) are collected in real time; when the collected engine water temperature and hydraulic oil temperature are higher than the set value, the engine radiator fan (19) and hydraulic oil radiator fan (20) are controlled to operate respectively to dissipate heat from the engine radiator (17) and hydraulic oil radiator (18).

6. The hybrid power roller control method according to claim 5, characterized in that, It also includes the following steps: if a radiator cleaning signal is received and the engine (1) is not running, control the engine radiator fan (19) and hydraulic oil radiator fan (20) to reverse.

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