A hybrid drive system for a mining dump truck

Abstract

The invention discloses a hybrid drive system for a mining dump truck, comprising: a vehicle controller electrically connected to a throttle and a slope sensor; a power battery electrically connected to the vehicle controller via a battery controller; an engine electrically connected to the vehicle controller via an engine controller, and a starter motor connected to the vehicle controller is provided on the engine; an AMT gearbox electrically connected to the vehicle controller via a gearbox controller; an automatic clutch is provided at the output end of the engine, and the automatic clutch is electrically connected to the vehicle controller; a clutch is provided at the output end of the engine, a main drive motor is provided between the automatic clutch and the input end of the AMT gearbox, and is electrically connected to the vehicle controller via a main drive motor controller, an auxiliary drive motor is provided at the output end of the AMT gearbox, and is electrically connected to the vehicle controller via an auxiliary drive motor controller; and a wheel drive assembly is provided at the output end of the auxiliary drive motor. The operation of the engine, the main drive motor and the auxiliary drive motor can be adjusted according to the road conditions to ensure smooth driving.

Description

Technical Field

[0001] The invention belongs to the technical field of mining vehicles, and in particular relates to a hybrid drive system of a mining dump truck. Background Art

[0002] Open-pit mines have complex road conditions, poor road conditions, and steep slopes. They are used to transport materials from the loading point to the unloading point for short-distance round trip transportation, and the transportation route is fixed. The working conditions of each mine are different. Some mines are heavily loaded uphill and empty downhill, while others are heavily loaded downhill and empty uphill. The slopes are also different. The altitudes of each mining area are different.

[0003] With the development of large-scale mining transportation equipment and the steep slope of mining transportation roads, the power requirements for power equipment are relatively high, while the purchase cost of domestic and foreign high-power engines remains high, resulting in relatively high manufacturing costs for the entire vehicle, leading to high purchase and operating costs for end customers. At the same time, due to the steep slope of the mine, the vehicle needs a large power to go uphill during operation. When going downhill, in order to avoid overspeeding, the brake needs to be used to limit the speed, which not only causes acceleration loss of the friction plate, but also causes the power to be lost in vain when going downhill. Summary of the invention

[0004] In view of the above problems, the present invention proposes a hybrid drive system for a mining dump truck that overcomes the above problems or at least partially solves the above problems.

[0005] According to one aspect of an embodiment of the present invention, a hybrid drive system for a mining dump truck is provided, comprising:

[0006] A vehicle controller is electrically connected to the throttle and the slope sensor, and receives a throttle signal from the throttle and / or receives a slope signal from the slope sensor;

[0007] A power battery is electrically connected to the vehicle controller via a battery controller, and the vehicle controller controls the operation of the power battery via the battery controller;

[0008] An engine is electrically connected to the vehicle controller through an engine controller, a starter motor is provided on the engine, the starter motor is connected to the vehicle controller, the vehicle controller controls the switch of the engine through the starter motor, and controls the running speed of the engine through the engine controller;

[0009] An AMT gearbox is electrically connected to the vehicle controller via a gearbox controller, and the vehicle controller controls the operation of the AMT gearbox via the gearbox controller;

[0010] An automatic clutch is provided at the output end of the engine, and the automatic clutch is electrically connected to the vehicle controller;

[0011] A main drive motor and an auxiliary drive motor, wherein a clutch is provided at the output end of the engine, the main drive motor is arranged between the automatic clutch and the input end of the AMT gearbox, the main drive motor is electrically connected to the vehicle controller via a main drive motor controller, the auxiliary drive motor is arranged at the output end of the AMT gearbox, the auxiliary drive motor is electrically connected to the vehicle controller via an auxiliary drive motor controller, and the vehicle controller adjusts the operating states of the main drive motor and the auxiliary drive motor according to a received throttle signal sent from the throttle, and / or a slope signal sent from a slope sensor, and / or a gear position signal sent from a gearbox controller;

[0012] The wheel drive assembly is arranged at the output end of the auxiliary drive motor.

[0013] Furthermore, the wheel drive assembly includes: a transmission shaft, a drive axle and two drive wheels, the transmission shaft is connected to the auxiliary drive motor, and the two drive wheels are connected to the transmission shaft through the drive axle.

[0014] Furthermore, the wheel drive assembly also includes: a wet brake, which is arranged on the inner side of at least one of the drive wheels, and the wet brake is electrically connected to the vehicle controller through a brake controller.

[0015] Furthermore, it also includes: a rotation speed sensor is provided on the two driving wheels, and the rotation speed sensor is electrically connected to the brake controller.

[0016] Furthermore, it also includes a load sensor, which is arranged at the bottom of the compartment of the mining dump truck and is electrically connected to the vehicle controller.

[0017] Furthermore, it also includes a wind speed sensor, which is arranged on the front of the mining dump truck and is electrically connected to the vehicle controller.

[0018] Furthermore, the slope sensor includes a plurality of gyroscopes, and the plurality of gyroscopes are arranged on the carriage of the mining dump truck.

[0019] Furthermore, it also includes a display instrument, which is electrically connected to the vehicle controller.

[0020] Furthermore, a shift motor is provided on the AMT gearbox, and the shift motor is electrically connected to the gearbox controller.

[0021] The hybrid drive system of a mining dump truck provided by the embodiment of the present invention has the following beneficial effects:

[0022] Through the technical solution of the present invention, the vehicle controller can control the operating conditions of various circuit elements of the mining dump truck, and can also analyze the current road conditions and vehicle operation conditions of the mining dump truck based on the throttle signal sent by the throttle, and / or the slope signal sent by the slope sensor, and / or the gear signal sent by the gearbox controller, and adjust the operating conditions of the engine, main drive motor and auxiliary drive motor, so that the mining dump truck can adapt to various road conditions for driving. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings, which constitute a part of the specification, illustrate embodiments of the present invention and, together with the description, serve to explain the principles of the present invention.

[0024] The present invention may be more clearly understood from the following detailed description with reference to the accompanying drawings, in which:

[0025] Figure 1 The figure is a schematic structural diagram of a hybrid drive system for a mining dump truck according to an embodiment of the present invention.

[0026] Description of reference numerals: 1 vehicle controller, 11 throttle, 12 slope sensor, 13 load sensor, 14 display instrument;

[0027] 2 power batteries, 21 battery controllers;

[0028] 3 engine, 31 engine controller, 32 starter motor, 33 automatic clutch;

[0029] 4AMT gearbox, 41 gearbox controller, 42 gear shift motor;

[0030] 5 main drive motor, 51 main drive motor controller;

[0031] 6 auxiliary drive motor, 61 auxiliary drive motor controller;

[0032] 7 wheel drive assembly, 71 transmission shaft, 72 drive axle, 73 drive wheel, 74 wet brake, 75 brake controller. DETAILED DESCRIPTION

[0033] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangement of components, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention unless otherwise specifically stated.

[0034] At the same time, it should be understood that for the convenience of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship.

[0035] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

[0036] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.

[0037] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0038] like Figure 1 As shown, a hybrid drive system of a mining dump truck includes: a vehicle controller 1, which is electrically connected to an accelerator 11 and a slope sensor 12, and receives an accelerator 11 signal sent by the accelerator 11 and / or receives a slope signal sent by the slope sensor 12; a power battery 2, which is electrically connected to the vehicle controller 1 through a battery controller 21, and the vehicle controller 1 controls the operation of the power battery 2 through the battery controller 21; an engine 3, which is electrically connected to the vehicle controller 1 through an engine controller 31, and a starter motor 32 is provided on the engine 3, and the starter motor 32 is connected to the vehicle controller 1, and the vehicle controller 1 controls the switch of the engine 3 through the starter motor 32, and controls the start of the engine 3 through the engine controller 31. The controller 31 controls the running speed of the engine 3; the AMT gearbox 4 is electrically connected to the vehicle controller 1 through the gearbox controller 41, and the vehicle controller 1 controls the operation of the AMT gearbox 4 through the gearbox controller 41; an automatic clutch 33 is provided at the output end of the engine 3, and the automatic clutch 33 is electrically connected to the vehicle controller 1; a main drive motor 5 and an auxiliary drive motor 6, a clutch is provided at the output end of the engine 3, the main drive motor 5 is arranged between the automatic clutch 33 and the input end of the AMT gearbox 4, the main drive motor 5 is electrically connected to the vehicle controller 1 through the main drive motor controller 51, and the auxiliary drive motor 6 is arranged at the output end of the AMT gearbox 4 (Automated Manual Transmissions, manual automatic gearbox), the auxiliary drive motor 6 is electrically connected to the vehicle controller 1 through the auxiliary drive motor controller 61, and the vehicle controller 1 adjusts the running state of the main drive motor 5 and the auxiliary drive motor 6 according to the throttle 11 signal sent by the throttle 11, and / or the slope signal sent by the slope sensor 12, and / or the gear position signal sent by the gearbox controller 41; a wheel drive component 7 is arranged at the output end of the auxiliary drive motor 6.

[0039] In the above solution, after the user starts the mining dump truck, he will step on the accelerator 11, and the accelerator 11 will send the accelerator 11 signal to the vehicle controller 1, and the vehicle controller 1 will control the various components to cooperate to make the mining dump truck run smoothly. For example, the AMT gearbox uses an 8-speed AMT gearbox.

[0040] The motor is installed at the input end of the ATM gearbox, after the clutch (i.e., the main drive motor). This is a P2 motor drive form that assists in driving the vehicle, compensates for the lack of engine power, and can also achieve pure electric drive.

[0041] The motor is installed at the output end of the ATM gearbox (i.e., the auxiliary drive motor), which belongs to the P3 motor drive form. It compensates for the power interruption during gear shifting, assists in driving, provides braking force, and recovers energy.

[0042] Through the cooperation of P2 and P3, it can ensure that the mining dump truck can run smoothly under various road conditions, as follows:

[0043] In the first case, the vehicle controller 1 controls the engine 3 to idle or shut down, controls the automatic clutch 33 to disengage, and if the AMT gearbox 4 is in gear at this time, controls the battery system to discharge the main drive motor 5, so that the main drive motor 5 drives, the auxiliary drive motor 6 does not work, and the main drive motor 5 drives the wheel drive assembly 7 to travel. This situation is suitable for the case where the speed is relatively slow, the slope signal received by the vehicle controller 1 is relatively stable (small change range, and the body slope is small), and only electric power is used for driving.

[0044] The second type is that the vehicle controller 1 controls the engine to idle or shut down, controls the automatic clutch 33 to disengage, and if the AMT gearbox 4 is in gear at this time, controls the battery system to discharge the main drive motor 5 and the auxiliary drive motor 6, so that the main drive motor 5 and the auxiliary drive motor 6 are driven, and the main drive motor 5 and the auxiliary drive motor 6 are used to drive the wheel drive assembly 7. This situation is suitable for the case where the speed is relatively fast, the slope signal received by the vehicle controller 1 is relatively stable (small change range, and the body slope is small), and only electric power is used for driving.

[0045] The third type is that the vehicle controller 1 controls the engine to idle or shut down, controls the automatic clutch 33 to disengage, and if the AMT gearbox 4 is in a gear shifting state (i.e., in gear or neutral) at this time, controls the battery system to discharge the auxiliary drive motor 6, and the main drive motor 5 does not work, so that the auxiliary drive motor 6 is driven, and the auxiliary drive motor 6 is used to drive the wheel drive assembly 7. This situation is suitable for when the user is shifting gears, or when shifting gears when climbing a slope, so as to avoid the situation where the vehicle speed is decelerated too fast or the vehicle slips.

[0046] Fourthly, when the vehicle controller 1 controls P3 to drive the wheel drive assembly 7 during driving, if it is found that the power level of the power battery 2 is lower than the set value (for example, 50%), the engine 3 is controlled to start, the automatic clutch 33 is engaged, and the engine 3 generates electricity through the main drive motor 5, and transmits the electricity to the power battery 2 for charging until the power battery 2 is fully charged.

[0047] The fifth type is that the vehicle controller 1 controls the engine 3 to run and the automatic clutch 33 is engaged. The vehicle controller 1 controls the main drive motor 5 to drive at a variable speed and controls the auxiliary drive motor 6 to compensate the wheel drive assembly 7 for torque. At this time, the power battery 2 does not work. This situation is applicable when only the engine 3 is used for driving.

[0048] The sixth type is that the vehicle controller 1 controls the engine 3 to run, the automatic clutch 33 is engaged, the main drive motor 5 is controlled to drive at a variable speed, and the power battery 2 is controlled to output power to the auxiliary drive motor 6, and the auxiliary drive motor 6 is used to drive the wheel drive assembly 7 or perform torque compensation. This situation is suitable for when the road conditions are relatively bad and the engine 3 and the auxiliary drive motor 6 need to be used for driving together.

[0049] Among them, the slope signal (the angle between the vehicle body and the horizontal plane) received by the vehicle controller 1 and sent by the slope sensor 12 changes greatly, or the slope signal indicates that the vehicle is in a climbing state and the slope is steep (for example, the slope exceeds 20%, where slope = (slope length / height)*100%), which proves that the road conditions are relatively bad.

[0050] The seventh type is that the vehicle controller 1 controls the engine 3 to run, the automatic clutch 33 is engaged, the power battery 2 is controlled to output power to the main drive motor 5 and the auxiliary drive motor 6, the main drive motor 5 is controlled to drive or speed-adjust, and the auxiliary drive motor 6 is used to drive or torque compensate the wheel drive assembly 7. This situation is suitable for when the road conditions are more severe and the engine 3, the main drive motor 5 and the auxiliary drive motor 6 need to be used for driving together.

[0051] The eighth type is that the vehicle controller 1 controls the engine 3 to run, the automatic clutch 33 is engaged, the power battery 2 is controlled to output power to the auxiliary drive motor 6, the main drive motor 5 is controlled to drive at a variable speed, the auxiliary drive motor 6 is used to drive the wheel drive assembly 7 or perform torque compensation, the engine 3 generates electricity through the main drive motor 5, and transmits the electricity to the power battery 2 for charging until the power battery 2 is fully charged. This situation is suitable for driving with the engine 3 and the auxiliary drive motor 6 together, and the power battery 2 is insufficient and needs to be charged.

[0052] Through the above scheme, the vehicle controller 1 can control the operating conditions of various circuit components of the mining dump truck, and can also analyze the current road conditions and vehicle operation conditions of the mining dump truck according to the throttle 11 signal sent by the throttle 11, and / or the slope signal sent by the slope sensor 12, and / or the gear signal sent by the gearbox controller 41, and adjust the operating status of the main drive motor 5 and the auxiliary drive motor 6, so that the mining dump truck can adapt to various road conditions for driving.

[0053] In a specific embodiment, the wheel drive assembly 7 includes: a transmission shaft 71 , a drive bridge 72 and two drive wheels 73 . The transmission shaft 71 is connected to the auxiliary drive motor 6 , and the two drive wheels 73 are connected to the transmission shaft 71 through the drive bridge 72 .

[0054] In the above solution, the auxiliary drive motor 6 is used to convert electric power into driving force, which is transmitted to two driving wheels 73 through the transmission shaft 71 and the drive axle 72, so that the driving wheels 73 rotate and the mining dump truck moves.

[0055] In a specific embodiment, the wheel drive assembly 7 further includes: a wet brake 74 , which is disposed on the inner side of at least one driving wheel 73 , and the wet brake 74 is electrically connected to the vehicle controller 1 via a brake controller 75 .

[0056] In the above solution, the brake controller 75 includes: an ASR controller (Acceleration Slip Regulation, traction control system) and / or an ABS controller (Anti-locked Braking System, anti-lock braking system).

[0057] The wet brake 74 is connected to the brake of the mining dump truck through the brake controller 75. When the user steps on the brake to brake, in order not to waste energy, the braking energy can be recovered, specifically including:

[0058] The ninth type is that the vehicle controller 1 controls the engine 3 to idle or shut down, controls the automatic clutch 33 to disengage, controls the main drive motor 5 to adjust the speed, starts the auxiliary drive motor 6 to brake, and uses the auxiliary drive motor 6 to recover the braking energy, convert it into electrical energy and transmit it to the power battery 2 for charging. This situation is suitable for when the user's braking force is small (that is, the brake pedal is depressed less than or equal to the set stroke), and only the auxiliary drive motor 6 is started for braking to recover energy.

[0059] The tenth type is that the vehicle controller 1 controls the engine 3 to idle or shut down, controls the automatic clutch 33 to disengage, controls the main drive motor 5 and the auxiliary drive motor 6 to brake, and uses the main drive motor 5 and the auxiliary drive motor 6 to recover the braking energy, convert it into electrical energy and transmit it to the power battery 2 for charging. This situation is suitable for when the user's braking force is small (that is, the distance traveled by the brake pedal is less than or equal to the set travel), and the main drive motor 5 and the auxiliary drive motor 6 are started at the same time for braking to recover energy.

[0060] In a specific embodiment, rotation speed sensors are provided on the two driving wheels 73 , and the rotation speed sensors are electrically connected to the brake controller 75 .

[0061] In the above scheme, the speed sensor can detect the rotation speed of the driving wheel and send the rotation speed to the vehicle controller 1 through the brake controller 75 in real time. If the rotation speeds of the two driving wheels are different, it proves that the wheels are slipping. Then the vehicle controller 1 sends a braking signal to the wet brake 74 through the brake controller 75, and the wet brake 74 applies braking force to the two driving wheels to prevent the driving wheels from slipping. That is, the function of the ASR controller (brake controller 75) is realized.

[0062] In a specific embodiment, it also includes a load sensor 13 , which is arranged at the bottom of the compartment of the mining dump truck and is electrically connected to the vehicle controller 1 .

[0063] In the above scheme, the load sensor 13 can detect the load information (i.e., weight) of the mining dump truck. If the load information exceeds a predetermined proportion of the nuclear load (e.g., 10%), a larger power is needed to drive the vehicle. The vehicle controller 1 will control the engine 3 to run, and at the same time control the power battery 2 to transmit power to the main drive motor 5 and the auxiliary drive motor 6, and start the main drive motor 5 and the auxiliary drive motor 6 for driving. In this way, the three power engines of the engine, the main drive motor 5 and the auxiliary drive motor 6 can be used to simultaneously drive the wheel drive assembly 7 for driving. In this way, the mining dump truck can ensure the normal and stable driving of the mining dump truck while carrying more materials.

[0064] In a specific embodiment, it also includes a wind speed sensor, which is arranged on the front of the mining dump truck and is electrically connected to the vehicle controller 1.

[0065] In the above scheme, the wind speed sensor can send the detected wind speed to the vehicle controller 1. If the wind speed is opposite to the driving direction of the mining dump truck, and the reverse wind speed exceeds the set reverse wind speed value (for example, 10m / s), a larger power is required for driving. The vehicle controller 1 will control the engine 3 to run, and at the same time control the power battery 2 to transmit electricity to the main drive motor 5 and the auxiliary drive motor 6, and start the main drive motor 5 and the auxiliary drive motor 6 for driving. In this way, the three power engines of the engine, the main drive motor 5 and the auxiliary drive motor 6 can be used to drive the wheel drive assembly 7 at the same time for driving. In this way, the mining dump truck can ensure the normal and stable driving of the mining dump truck when the reverse wind speed is large.

[0066] In addition, if the wind speed detected by the wind speed sensor is the same as the driving direction of the mining dump truck, if the forward wind speed exceeds the set forward wind speed value (for example, 10m / s), if the vehicle speed is fast at this time, the vehicle controller 1 needs to control the engine 3 to stop running, and at the same time control the main drive motor 5 and / or the auxiliary drive motor 6 to start the braking function, brake the drive wheels, and use the main drive motor 5 and the auxiliary drive motor 6 to recover the braking energy, convert it into electrical energy and transmit it to the power battery 2 for charging.

[0067] In a specific embodiment, the slope sensor 12 includes a plurality of gyroscopes, and the plurality of gyroscopes are arranged on the carriage of the mining dump truck. In order to ensure the detection effect, the plurality of gyroscopes need to be arranged on the same horizontal plane, so that the connection angle of each gyroscope can detect whether the vehicle is in an uphill state or a downhill state, and then the vehicle controller 1 can adjust the operating state of the main drive motor 5 and the auxiliary drive motor 6 according to different states, so that the mining dump truck can travel smoothly.

[0068] In a specific embodiment, a display instrument 14 is also included, and the display instrument 14 is electrically connected to the vehicle controller 1. The controller controls the operation status and results of each component to be displayed on the display instrument 14.

[0069] In a specific embodiment, a shift motor 42 is provided on the AMT gearbox 4, and the shift motor 42 is electrically connected to the gearbox controller 41. The shift motor 42 can realize the automatic shifting function without the user having to manually shift gears. The vehicle controller 1 transmits the gear position information to the gearbox controller 41, and the gearbox controller 41 adjusts the gear position of the AMT gearbox 4 through the shift motor 42 to realize the gear shifting process.

[0070] A hybrid drive system for a mining dump truck according to another embodiment of the present invention can solve the following current problems:

[0071] 1) The cost of purchasing an engine that meets the power and torque requirements is very high.

[0072] 2) Energy cannot be recovered, resulting in energy waste. When going downhill, the friction plate wears out too quickly.

[0073] 3) The vehicle speed is slow and the transportation efficiency is low.

[0074] 4) Currently, mining dump trucks are mainly powered by high-power diesel engines, which have high fuel costs and high emissions that pollute the environment. In high-altitude areas, engine power decreases as the altitude increases, resulting in insufficient power for mining dump trucks.

[0075] 5) In recent years, pure electric mining dump trucks powered by batteries require large battery capacity, which leads to high cost, large weight and volume. Special charging equipment is also needed for parking and charging, which affects the working time. From the perspective of economy, pure electric mining dump trucks can only be used for heavy-load downhill or flat road conditions, not for heavy-load climbing conditions (heavy-load climbing conditions account for more than 70% of mining conditions).

[0076] The solution adopted in this embodiment is:

[0077] 1) Choose a smaller power engine and supplement it with power batteries, main drive motors and auxiliary drive motors to reduce the purchase cost of high-power engines. The energy of the mining dump truck when going downhill, braking and decelerating is stored in the battery, which assists the engine drive when going uphill, saving fuel costs.

[0078] 2) According to the working conditions of the mine, choose the appropriate hybrid technology route. The hybrid technology route of the main drive motor + auxiliary drive motor is adopted: the main drive motor and the auxiliary drive motor assist in driving to make up for the insufficient power of the engine; at the same time, the main drive motor has the function of adjusting the engine working point to avoid or reduce the engine working in unfavorable operating modes, such as idling, low-speed crawling, etc., to reduce fuel consumption; the auxiliary drive motor can make up for power interruption when shifting gears. Dual motors (that is, the main drive motor and the auxiliary drive motor together) provide braking force and recover energy. Dual motors can also achieve pure electric drive, and the high speed of the motor is used to increase the maximum speed of the vehicle. The assist effect of the peak torque of the motor improves the acceleration performance of mining dump trucks.

[0079] 3) The intelligent combination of engine, main drive motor and auxiliary drive motor, matched with an 8-speed AMT gearbox, has a wide speed regulation range and meets both the climbing grade and vehicle speed requirements.

[0080] 4) Monitor the SOC level, identify the working condition and load condition through the slope sensor and load sensor, identify the driver's operating intention through the electronic accelerator pedal (i.e., accelerator), control the three-engine intelligent combination through the vehicle controller and automatically select the appropriate gear, output the required torque and speed, drive the vehicle efficiently and economically, and ensure the power balance of the working cycle at the same time. No charging equipment is required, and there is no need to stop for charging, which significantly improves transportation efficiency.

[0081] 5) As mines are operated in a round-trip manner and the routes are relatively fixed, the control system can be adaptive and self-learning, and the unmanned driving function can be upgraded as needed.

[0082] 6) The modular design of the power battery allows different battery capacities to be selected according to the working conditions to form different oil-electric hybrid ratios, achieving full coverage of working conditions while maximizing economy. In high-altitude areas, the engine power will decrease as the altitude increases, resulting in insufficient power for the entire vehicle. The use of an engine + battery hybrid system can solve this problem.

[0083] 7) Under heavy-load downhill conditions, the vehicle controller controls the combined braking method of engine braking + motor feedback braking + wet brake to achieve automatic constant speed downhill, simplifying the driver's operation. At the same time, due to the use of three deceleration methods, the deceleration capacity of the vehicle is greatly improved, allowing the vehicle to safely go downhill at a higher speed, shortening the working cycle time and improving transportation efficiency. The wet brake integrates ABS / ASR functions to improve the driving ability on soft and slippery roads.

[0084] The present invention can automatically realize the following working modes in Table 1 according to working conditions through the intelligent combination of the engine, the main drive motor and the auxiliary drive motor:

[0085] Table 1

[0086]

[0087]

[0088] The vehicle controller measures and calculates the load and slope in real time, and dynamically selects the working state of each component. See Table 2 below for details:

[0089] Table 2

[0090]

[0091]

[0092] In summary, it has the following advantages:

[0093] 1) Adaptability: All operating conditions can be covered by adjusting the oil-electric hybrid ratio.

[0094] 2) Economy: Reducing engine power reduces the purchase cost of mining dump trucks; saving fuel through energy recovery, with obvious economic benefits.

[0095] 3) Intelligence: Adaptive self-learning intelligent control system automatically outputs torque and speed according to working conditions, simplifying driver operation.

[0096] 4) High efficiency: fast speed and short working cycle time; no need to wait for charging, high transportation efficiency.

[0097] 5) Safety: 3 braking modes and strong deceleration capability ensure driving safety.

[0098] Each embodiment in this specification is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referenced to each other.

[0099] The description of the present invention is given for the purpose of illustration and description, and is not intended to be exhaustive or to limit the invention to the disclosed form. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for particular uses.

Claims

1. A hybrid drive system for a mining dump truck, characterized in that: include: A vehicle controller (1) is electrically connected to the throttle (11) and the slope sensor (12), and receives a throttle (11) signal sent by the throttle (11) and / or receives a slope signal sent by the slope sensor (12); A power battery (2) is electrically connected to the vehicle controller (1) via a battery controller (21), and the vehicle controller (1) controls the operation of the power battery (2) via the battery controller (21); The engine (3) is electrically connected to the vehicle controller (1) via an engine controller (31); a starter motor (32) is provided on the engine (3); the starter motor (32) is connected to the vehicle controller (1); the vehicle controller (1) controls the switch of the engine (3) via the starter motor (32), and controls the running speed of the engine (3) via the engine controller (31); An AMT gearbox (4) is electrically connected to the vehicle controller (1) via a gearbox controller (41); the vehicle controller (1) controls the operation of the AMT gearbox (4) via the gearbox controller (41); a gear shift motor (42) is provided on the AMT gearbox (4); and the gear shift motor (42) is electrically connected to the gearbox controller (41); An automatic clutch (33) is provided at the output end of the engine (3), and the automatic clutch (33) is electrically connected to the vehicle controller (1); A main drive motor (5) and an auxiliary drive motor (6), wherein a clutch is provided at the output end of the engine (3), the main drive motor (5) is arranged between the automatic clutch (33) and the input end of the AMT gearbox (4), the main drive motor (5) is electrically connected to the vehicle controller (1) via a main drive motor controller (51), the auxiliary drive motor (6) is arranged at the output end of the AMT gearbox (4), the auxiliary drive motor (6) is electrically connected to the vehicle controller (1) via an auxiliary drive motor controller (61), and the vehicle controller (1) adjusts the operating states of the main drive motor (5) and the auxiliary drive motor (6) according to a throttle (11) signal received from the throttle (11), and / or a slope signal received from a slope sensor (12), and / or a gear position signal received from a gearbox controller (41); A wheel drive assembly (7) is arranged at the output end of the auxiliary drive motor (6).

2. The hybrid drive system according to claim 1, characterized in that: The wheel drive assembly (7) comprises: a transmission shaft (71), a drive bridge (72) and two drive wheels (73); the transmission shaft (71) is connected to the auxiliary drive motor (6); and the two drive wheels (73) are connected to the transmission shaft (71) via the drive bridge (72).

3. The hybrid drive system according to claim 2, characterized in that: The wheel drive assembly (7) further comprises: a wet brake (74), wherein the wet brake (74) is arranged inside the drive wheel (73), and the wet brake (74) is electrically connected to the vehicle controller (1) via a brake controller (75).

4. The hybrid drive system according to claim 3, characterized in that: Rotation speed sensors are provided on the two driving wheels (73), and the rotation speed sensors are electrically connected to the brake controller (75).

5. The hybrid drive system according to claim 1, characterized in that: It also includes a load sensor (13), which is arranged at the bottom of the compartment of the mining dump truck and is electrically connected to the vehicle controller (1).

6. The hybrid drive system according to claim 1, characterized in that: It also includes a wind speed sensor, which is arranged on the front of the mining dump truck and is electrically connected to the vehicle controller (1).

7. The hybrid drive system according to claim 1, characterized in that: The slope sensor (12) comprises a plurality of gyroscopes, and the plurality of gyroscopes are arranged on a carriage of a mining dump truck.

8. The hybrid drive system according to claim 1, characterized in that: It also includes a display instrument (14), and the display instrument (14) is electrically connected to the vehicle controller (1).

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