Hybrid airport fire truck chassis operation control system

Abstract

The invention discloses a hybrid airport fire fighting truck chassis operation control system, which comprises a chassis frame, a water pump, a power battery and a vehicle control unit, and further comprises a diesel engine mounted on the chassis frame; the power takeoff is connected with the diesel engine; the AT gearbox is also connected with the diesel engine; the AT gearbox is connected with the input end of the power transfer case through a transmission shaft; and the driving motor is connected with the input end of the power transfer case through a speed reducer. The problems that a traditional chassis is single in power source, vehicle in-out garage emission waste gas treatment and driving power take-off are solved, the problem that a vehicle cannot run when an engine breaks down or a motor breaks down is solved, and the problems that the whole vehicle is insufficient in power performance and poor in economical efficiency are solved.

Description

Technical Field

[0001] The present invention belongs to the field of fire fighting technology. Specifically, the present invention relates to a hybrid airport fire truck chassis operation control system. Background Art

[0002] Currently, typical special chassis for airport fire trucks all have one or two large horsepower engines, and their electronic control principles are that the engine ECU outputs corresponding power according to the driver's needs, either the engine is fully used for driving, or the engine is used for driving while also used for power take-off.

[0003] Existing engines are limited by their own output characteristics and have poor starting and accelerating performance.

[0004] However, for a single-engine drive solution, the key assembly resource supply manufacturers are relatively single, the cost remains high, which is not conducive to the development of the industry. The engine emissions affect the environment, and the exhaust gas generated during startup in the parking garage needs to be specially treated. The vehicle requires on-road power take-off, and when the water pump needs to pump water at full power, the vehicle can travel at different speeds. This power take-off method is relatively difficult to achieve and relies on imported components. Summary of the Invention

[0005] The present invention provides a hybrid airport fire truck chassis operation control system, which solves the problems raised in the above background art.

[0006] To achieve the above object, the technical solution adopted by the present invention is: a hybrid airport fire truck chassis operation control system, including a chassis frame, a water pump, a power battery, and a vehicle controller, further including: A diesel engine, which is installed on the chassis frame; A power take-off, which is connected to the diesel engine; An AT transmission, which is also connected to the diesel engine; A power transfer case, and the AT transmission is connected to the input end of the power transfer case through a drive shaft; A drive motor, which is connected to the input end of the power transfer case through a reducer.

[0007] Preferably, the drive axle is adjusted according to the use requirements and is applicable to vehicles of 4X4, 6X6, and 8X8 models.

[0008] Preferably, the drive axle includes front axle drive and rear axle drive, and both the front axle drive and the rear axle drive are connected to the output case of the power transfer case through drive shafts.

[0009] In the rapid acceleration driving mode, the engine and the drive motor work simultaneously and are combined through a coupling box to jointly drive the transmission, and the acceleration time is less than 20S.

[0010] When in the driving water pumping mode, the drive motor independently controls the gearbox, and the engine controls the power take-off to provide reliable water pumping for the upper mounting.

[0011] When in the parking water pumping mode, the engine controls the power take-off to achieve parking water pumping.

[0012] When in the pure electric mode, the motor independently controls the gearbox for driving, and the upper mounting can pump water.

[0013] When in the parking charging mode, it can be charged through an external charging pile or by the engine generating electricity.

[0014] The beneficial effects of adopting the above technical solutions are as follows: 1. Solve the problem of the single power source of the traditional chassis. In the vehicle startup process, the drive motor is ingeniously put into the electric mode. When the vehicle starts, the drive motor responds quickly. With its unique electric characteristics, it can output stable and strong torque instantly. This measure makes the power source of the vehicle no longer limited to the traditional single form, but adds the flexible and efficient electric drive power mode. The electric mode of the drive motor can accurately distribute power according to the actual driving needs of the vehicle, not only improving the power performance of the vehicle in the startup stage, but also laying a good power foundation for the subsequent driving process, enabling the vehicle to show better performance in different road conditions and driving scenarios.

[0015] 2. Solve the problem of exhaust gas treatment when the vehicle enters and exits the warehouse. The invention adopts the strategy of the drive motor being electric and the engine idling when the vehicle starts. When the vehicle is about to enter and exit the warehouse, the drive motor starts to work to provide the required power for the vehicle. At this time, the engine is in the idling state and does not perform actual work and combustion processes. Relying on its efficient and clean power output characteristics, the drive motor can smoothly drive the vehicle to complete the entry and exit operations. Since the engine does not participate in the actual power output, it avoids generating a large amount of exhaust gas during the short-distance and frequent start-stop process of entering and exiting the warehouse, thus effectively solving the problem of exhaust gas treatment when the vehicle enters and exits the warehouse and significantly reducing the environmental pollution of the vehicle in this specific scenario.

[0016] 3. Solve the problem of drive power take-off. The invention adopts an electronic control scheme in which the engine works and the power take-off drives the water pump to take power. When the vehicle needs to drive equipment such as a water pump, the engine works normally to provide a power source for the whole system. Under the precise control of the electronic control system, the power take-off is efficiently connected to the engine and power is transmitted. The power take-off can accurately obtain the power of the engine according to the working needs of the water pump and transmit it to the water pump to ensure that the water pump can work stably and efficiently. This electronic control scheme realizes the reasonable distribution and effective utilization of power, improves the efficiency and reliability of drive power take-off, and provides strong support for the application of the vehicle in special working scenarios.

[0017] IV. To solve the problem that the vehicle cannot move when the engine fails or the motor fails. When the engine fails in the present invention, the drive motor can, under the coordinated action of the coupling box / power transfer case and the electronic control system, independently undertake the task of driving the vehicle. The drive motor can automatically adjust the output power according to the driving state and load condition of the vehicle to ensure that the vehicle can continue to drive safely and stably. Conversely, when the drive motor fails, the engine can transmit power to the wheels through the coupling box / power transfer case, enabling the vehicle to still maintain the ability to drive. This electronic control solution realizes the flexible switching and coordinated operation between the engine and the drive motor, greatly improving the reliability and safety of the vehicle and reducing the risk of the vehicle being unable to move due to failures.

[0018] V. To solve the problems of insufficient vehicle power performance and poor economy. During the driving process of the vehicle in the present invention, according to different working conditions and driving requirements, the system will automatically select the appropriate driving mode. When the vehicle needs strong power, such as when accelerating to overtake or climbing a slope, the drive motor and the engine can work simultaneously to jointly provide strong power support for the vehicle to ensure that the vehicle can respond quickly and easily handle various complex road conditions. In some low-speed and light-load driving scenarios, such as in urban congested sections, the drive motor can drive the vehicle alone, and at this time the engine stops working, avoiding unnecessary energy consumption and improving the economy of the vehicle. This flexible driving mode realizes the organic combination of power performance and economy, enabling the vehicle to achieve the best performance state under different driving conditions, bringing a better driving experience and lower usage cost to users. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is the assembly drawing of the chassis of the hybrid airport fire truck; Figure 2 is the top view of the chassis of the hybrid airport fire truck; Figure 3 is the front view of the chassis of the hybrid airport fire truck; Figure 4 is the schematic diagram of the power chain principle of the chassis of the airport fire truck; Wherein: 1. Diesel engine; 2. Power take-off; 3. AT transmission; 4. Power transfer case; 5. Drive motor. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The following further details the specific embodiments of the present invention by describing the embodiments with reference to the accompanying drawings, aiming to help those skilled in the art have a more complete, accurate and in-depth understanding of the concept and technical solution of the present invention and contribute to its implementation. Embodiment 1

[0021] Specifically, asFigures 1 to 3 As shown in the figure, a hybrid airport fire truck chassis operation control system includes a chassis frame, a water pump, a power battery, and a vehicle controller, and further includes: A diesel engine 1, which is installed on the chassis frame; A power take-off 2, which is connected to the diesel engine 1; An AT transmission 3, which is also connected to the diesel engine 1; A power transfer case 4, and the AT transmission 3 is connected to the input end of the power transfer case 4 through a drive shaft; A drive motor 5, which is connected to the input end of the power transfer case 4 through a reducer.

[0022] It should be noted that at least one diesel engine 1 is provided to drive the power take-off 2 and the water pump to work; at least one drive motor 5 is also provided, which is used to drive the vehicle or perform power generation energy recovery or enter the low-torque mode for dynamic following; there is at least one group of power batteries, which is used to supply energy to the main drive motor or recover energy; at least one power transfer case 4 is provided, which can realize the combination and disconnection of the engine end, the motor end, the drive front axle, and the drive rear axle end.

[0023] In addition, the engine horsepower is greater than 1000 hp; the rated power of the drive motor is 300 kw - 400 kw, and the maximum power of the main drive motor is 500 kw - 600 kw; the AT gear of the transmission is 6 gears; the fire pump of the airport fire truck chassis can take power through the engine power take-off or through a separately installed drive motor.

[0024] The drive axle is adjusted according to the use requirements and is applicable to vehicles of models 4X4, 6X6, and 8X8.

[0025] It should be noted that the airport fire truck chassis can be driven by the parallel hybrid of the engine and the main drive motor.

[0026] The drive axle includes a front axle drive and a rear axle drive, and both the front axle drive and the rear axle drive are connected to the output box of the power transfer case 4 through drive shafts.

[0027] It should be noted that for the two input shafts, one shaft is connected to the engine end, with a designed maximum input torque of 15000 Nm for input power, and the other is connected to the motor end, with a designed maximum input power of 22000 Nm; For the two output shafts (front and rear), the designed output torque is 39000 Nm. Embodiment 2

[0028] Specifically, as Figure 4As shown, in the rapid acceleration driving mode, the engine and the drive motor work simultaneously and are combined through the coupling box to jointly drive the gearbox, and the acceleration time is less than 20S.

[0029] In the driving water injection mode, the drive motor independently controls the gearbox, and the engine controls the power take-off to provide reliable water injection for the upper mounting.

[0030] In the parking water injection mode, the engine controls the power take-off to achieve parking water injection.

[0031] In the pure electric mode, the motor independently controls the gearbox for driving, and the upper mounting can inject water.

[0032] In the parking charging mode, it can be charged through an external charging pile, or it can be charged through engine power generation; It should be noted that the electric control principle of the airport fire truck under different working conditions will be briefly described below.

[0033] Condition A: Acceleration condition. The drive motor and the engine drive the chassis together. The power battery 7 and fuel provide energy. The coupling box couples the engine, motor, and drive axle end. At this time, due to the intervention of the two power sources, the acceleration ability will be greatly improved, <20s.

[0034] Condition B: Driving water injection condition. At this time, the drive motor and the engine drive the chassis, and at the same time, they are connected to the water pump through the power take-off to be responsible for water injection. The coupling box couples the engine, motor, and drive axle end; at this time, according to the vehicle state, if the SOC of the power battery is relatively high, the motor mainly drives the vehicle; if the SOC of the power battery is relatively low, in addition to providing power for the power take-off, the engine mainly drives the vehicle, so as to achieve the stability of the battery SOC.

[0035] Condition C: Parking water injection condition. The drive motor enters the standby mode. The engine provides power for the power take-off. The coupling box disconnects the connection of the engine end, and the vehicle can move and switch stations at any time.

[0036] Condition D: Pure electric driving condition. The drive motor is the only power source for driving the chassis. The coupling box disconnects the connection of the engine end. At this time, if water injection is required, the engine provides power for water injection.

[0037] Condition E: Parking charging condition. It can be charged through an external charging pile, or the coupling box can disconnect the connection between the front and rear axles, and the engine and the motor form an extended range system to charge the battery pack.

[0038] Condition F: Drive motor / engine failure condition. The power can be output through the combination of the other power source and the coupling box to drive the vehicle; Condition G: Out-of-warehouse and in-warehouse conditions. At this time, it is completely driven by the main drive motor 4 as the vehicle power source, and there is no engine exhaust emission in the garage.

[0039] Operating condition H: When the vehicle encounters a situation where it needs to get out of trouble, the coupling box couples the engine end, the motor end, and the front and rear axles together to form a dual power source four-wheel drive solution for vehicle driving, realizing a quick escape from trouble.

[0040] Performance parameter comparison table: Index Traditional fire truck This hybrid system Improvement rate Acceleration time from 0 to 80 km / h 32 - 35 seconds <20 seconds ≥40% Maximum continuous climbing gradient 30% 45% 50% Pump flow rate (driving condition) 5000 L / min 8000 L / min 60% Garage emissions NOx > 500 ppm 0 ppm (pure electric mode) 100% Continuous combat time 45 minutes (full fuel) 75 minutes (hybrid mode) 66% Application scenarios Airport runway emergency response In the dual power coupling mode, the 8×8 chassis can reach a cruising speed of 80 km / h within 18 seconds, while maintaining a water cannon flow rate of 6000 L / min, meeting the FAA Class IV airport fire protection standard.

[0041] Underground garage fire extinguishing The pure electric mode supports 45 minutes of operation in a confined space. With a positive pressure air supply system, it completely solves the risk of carbon monoxide poisoning caused by traditional diesel vehicles.

[0042] Mountainous complex terrain The power transfer case realizes full-time four-wheel drive. With the millisecond-level torque response of the motor, it still maintains a stable traction force on a wet road surface with a 40% slope.

[0043] The above has made an exemplary description of the present invention in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited by the above methods. As long as various non-substantive improvements are made by adopting the method concept and technical solution of the present invention; or without improvement, the above concept and technical solution of the present invention are directly applied to other occasions, they are all within the protection scope of the present invention.

Claims

1. A chassis operation control system for a hybrid airport fire truck, comprising a chassis frame, a water pump, a power battery and a vehicle controller, characterized in that: Also includes: A diesel engine (1), wherein the diesel engine (1) is mounted on a chassis frame; A power take-off (2), the power take-off (2) being connected to the diesel engine (1); An AT gearbox (3), the AT gearbox (3) also being connected to the diesel engine (1); A power transfer case (4), wherein the AT gearbox (3) is connected to an input end of the power transfer case (4) via a transmission shaft; A drive motor (5) is connected to an input end of a power transfer case (4) via a reducer.

2. The chassis operation control system of a hybrid airport fire truck according to claim 1 is characterized by: The drive axle is adjusted according to usage requirements and is suitable for 4X4, 6X6, and 8X8 vehicles.

3. The chassis operation control system of a hybrid airport fire truck according to claim 2, characterized in that: The drive axle comprises a front axle drive and a rear axle drive, and both the front axle drive and the rear axle drive are connected to an output box of a power transfer case (4) via a transmission shaft.

4. The chassis operation control system of a hybrid airport fire truck according to claim 1, characterized in that: In the rapid acceleration driving mode, the engine and the drive motor work simultaneously and are combined through the coupling box to jointly drive the gearbox. The acceleration time is less than 20 seconds.

5. The chassis operation control system of a hybrid airport fire truck according to claim 1, characterized in that: In driving water pumping mode, the drive motor controls the gearbox alone, and the engine controls the power take-off to provide reliable upper water pumping.

6. The chassis operation control system of a hybrid airport fire truck according to claim 1, characterized in that: In the stop-water pumping mode, the engine controls the power take-off to achieve stop-water pumping.

7. The chassis operation control system of a hybrid airport fire truck according to claim 1, characterized in that: In pure electric mode, the motor independently controls the transmission drive, and the upper body can be pumped with water.

8. The chassis operation control system of a hybrid airport fire truck according to claim 1, characterized in that: In parking charging mode, the vehicle can be charged through an external charging station or through engine power generation.

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