High-power engine power take-off power generation and power supply system

Abstract

The invention discloses a power take-off power generation and power supply system for a high-power engine. The power take-off power generation and power supply system comprises a high-power power take-off power generation device, a system controller, a high-voltage inverter, an energy storage battery box, an integrated high-voltage power distribution and transformation power transformation system, a cooling heat dissipation device and the engine. A power take-off power generation system is conveniently and additionally arranged on a vehicle without a power take-off power generation structure, and the generated power is higher than that of a belt power take-off scheme. The engine power take-off power generation and power supply system is wide in adaptability and can be additionally arranged on various vehicles provided with common engines theoretically, and due to the fact that fans and connecting structures of the fans and engine crankshafts are designed at the front ends of engines of most vehicles, the economical efficiency of the vehicles is improved; the engine load rate of the engine under the low load condition can be improved through the power take-off generator, and then the working efficiency of the engine is improved; and on the other hand, after the structure is additionally arranged, other accessories adopting belt power take-off of the original vehicle can be all canceled.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of automobile parts, and particularly relates to a high-power engine power take-off power generation and power supply system, which is suitable for the demand of converting large power from an engine into electric energy without originally designed power take-off device in the engine and transmission system structure, and does not affect the normal driving function of the original vehicle after modification. BACKGROUND

[0002] Generally, the vehicle-mounted power take-off power generation device can only rely on the power take-off port of the gearbox to obtain power. For the case without designed power take-off interface, the power take-off by pulley can be used. However, the power take-off by pulley has the disadvantage that it mainly relies on the friction force to transmit torque, and is therefore limited by the size of the pulley and the cross-sectional shape, material strength and other conditions of the belt. Therefore, for the application scenario without originally designed power take-off device and with large power take-off power generation, there is currently no simple and effective power take-off power generation and power supply system to achieve it, which cannot meet the production needs of people. SUMMARY

[0003] The present application provides a high-power engine power take-off power generation and power supply system which is universally applicable and can greatly exceed the power take-off power generation of the belt power take-off structure.

[0004] Technical scheme: A high-power engine power take-off power generation and power supply system, comprising: a high-power power take-off power generation device, a system controller, a high-voltage inverter, an energy storage battery box, an integrated high-voltage power distribution, a voltage transformation system, a cooling and heat dissipation device, and an engine. The crankshaft front end of the engine is connected to the high-power power take-off power generation device, the high-power power take-off power generation device comprises a speed-increasing gearbox, a permanent magnet generator and an alternator. The high-voltage inverter is connected to the energy storage battery box, and the integrated high-voltage power distribution and voltage transformation system are connected together with the energy storage battery box through the high-voltage bus, and according to the actual power demand of the vehicle, the high-voltage power is converted into low-voltage or 220V or 380V alternating current. The system controller determines whether the engine needs to be involved according to the amount of electricity of the energy storage battery box. If the amount of electricity of the energy storage battery box is high, the energy storage battery box independently supplies power, the energy storage battery box is inversely converted into alternating high-voltage power by the integrated high-voltage power distribution and voltage transformation system to supply power to external loads, and can also output low-voltage direct current to supply power to some loads. If the power of the energy storage battery box is lower than a certain design value, the system controller controls the engine to work, the engine supplies power to the permanent magnet generator and the alternating current motor through the speed increasing gear box, the permanent magnet generator generates three-phase electricity which is inverted into direct current by the high-voltage inverter to charge the energy storage battery box.

[0005] As a further improvement of the application: the speed increasing gear box has one input shaft and two output shafts, one of which is used to connect the generator for high-voltage power generation, and the other is used to connect the alternating current generator, which is used to generate low-voltage power for the vehicle.

[0006] As a further improvement of the application: the engine crankshaft directly drives the cooling fan, which is replaced by an electronic fan, and the original single cooling fan is replaced by multiple small-diameter electronic fans to save space for arranging the newly added speed increasing gear box.

[0007] As a further improvement of the application: the permanent magnet generator is the main power supply, which charges the energy storage battery box on one hand and supplies power to the integrated high-voltage power distribution and voltage conversion system through the energy storage battery box on the other hand.

[0008] As a further improvement of the application: the alternating current generator is mainly used for emergency low-voltage power supply, when the high-voltage power generation system or its DC / DC module of the system fails, resulting in no continuous low-voltage power supply source for the vehicle, the system controller temporarily starts the alternating current generator to convert engine kinetic energy into electric energy to supply low-voltage power for the vehicle during normal driving or to supply power for other low-voltage loads.

[0009] Advantages: The specific advantages of the application are as follows: 1. The application is convenient for adding a power take-off power generation system to vehicles that do not originally have a power take-off power generation structure, and the power generation power is higher than that of the belt power take-off scheme.

[0010] 2. The engine power take-off power generation and power supply system of the application has wide adaptability, and in theory, it can be added to vehicles with various types of ordinary engines, because most vehicle engines have fan connection structures at the front end of the engine.

[0011] 3. The engine power take-off power generation and power supply system of the application can improve the economy of the vehicle, on one hand, after adding the power take-off power generation system, the engine load rate of the engine under low load conditions can be improved through the power take-off generator, thereby improving the engine efficiency; on the other hand, after adding this structure, the remaining accessories of the original vehicle that use belt power take-off can also be completely cancelled, such as the air conditioner compressor which can be replaced by an electric air conditioner compressor, and the original alternating current generator which can be replaced by a high-voltage DC / DC. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1This is a schematic diagram of the structure of the present invention. Detailed Implementation

[0013] The technical solutions in the embodiments of the present invention will be clearly and completely described below, so that those skilled in the art can better understand the advantages and features of the present invention, thereby making a clearer definition of the scope of protection of the present invention. The embodiments described in this invention are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention. Example

[0014] like Figure 1 As shown, a high-power engine power take-off and power supply system includes: a high-power power take-off device 1, a system controller 2, a high-voltage inverter 3, an energy storage battery box 4, an integrated high-voltage power distribution and transformer system 5, a cooling and heat dissipation device 6, and an engine 7.

[0015] The crankshaft front end and cooling fan structure of engine 7 are removed, and a high-power power take-off generator 1 is connected. The high-power power take-off generator 1 includes a speed-increasing gearbox 11, a permanent magnet generator 12, and an AC generator 13. The speed-increasing gearbox 11 has one input shaft and two output shafts. One output shaft is used to connect to a generator for high-voltage power generation, and the other output shaft is used to connect to an AC generator, which is used to generate low-voltage electricity for the vehicle.

[0016] The crankshaft-driven cooling fan of the original engine 7 can be replaced with an electric fan. Depending on the actual space dimensions, the original single large fan can be replaced with multiple small-diameter electric fans to save space for the newly added speed-increasing gearbox 11.

[0017] Add a high-voltage inverter 3 that matches the high-voltage generator, a high-voltage power distribution device and an energy storage device, and connect the integrated high-voltage power distribution and transformer system 5 to the energy storage battery box 4 through the high-voltage bus. According to the actual power demand of the vehicle, the high-voltage electricity is converted into low-voltage or 220V or 380V AC electricity.

[0018] The system controller 2 determines whether the engine 7 needs to intervene based on the power level of the energy storage battery box 4. If the energy storage battery box 4 has a high power level, it will be powered independently first. The energy storage battery box 4 will be converted into AC high voltage through the integrated high voltage power distribution and transformer system 5 to power the external load. It can also output low voltage DC to power some loads. If the charge of the energy storage battery box 4 is lower than a certain design value, the system controller 2 controls the engine 7 to work, and the engine 7 supplies energy to the permanent magnet generator 12 and the AC motor 13 through the speed-increasing gearbox 11.

[0019] The permanent magnet generator 12 mainly generates three-phase electricity, which is then converted into DC power by the high-voltage inverter 3 to charge the energy storage battery box 4. The permanent magnet generator 12 is the main energy source, charging the energy storage battery box 4 on one hand, and supplying power to the integrated high-voltage power distribution and transformer system 5 through the energy storage battery box 4 on the other hand.

[0020] The alternator 13 is mainly activated by the system controller 2 when the high-voltage power distribution and transformer system 5 fails, resulting in no continuous low-voltage power supply to the vehicle. The alternator 13 converts the kinetic energy of the engine 7 into electrical energy to provide low-voltage power for normal vehicle operation or to power other loads.

[0021] This invention facilitates the installation of a power take-off (PTO) system on vehicles that were not originally designed with a PTO structure, and the power output is higher than that of the belt-driven PTO solution.

[0022] The engine power take-off and power supply system of the present invention has wide applicability and can theoretically be installed on various vehicles equipped with ordinary engines, because most vehicles have a fan and its connection structure with the engine crankshaft at the front end of the engine.

[0023] The engine power take-off and power supply system of the present invention can improve vehicle economy. On the one hand, after the power take-off system is installed, the engine load rate under low load conditions can be increased by the power take-off generator, thereby improving the engine working efficiency. On the other hand, after this structure is installed, all other accessories of the original vehicle that use belt power take-off can be eliminated. For example, the air conditioning compressor can be replaced with an electric air conditioning compressor, and the original alternator can be replaced with a high-voltage DC / DC converter.

Claims

1. A high-power engine power take-off and power supply system, characterized in that: include: High-power power take-off generator (1), system controller (2), high-voltage inverter (3), energy storage battery box (4), integrated high-voltage power distribution and transformer system (5), cooling and heat dissipation device (6) and engine (7); The crankshaft of the engine (7) is connected to a high-power power take-off generator (1), which includes a speed-increasing gearbox (11), a permanent magnet generator (12), and an alternator (13). The high-voltage inverter (3) is connected to the energy storage battery box (4), and the integrated high-voltage power distribution and transformer system (5) is connected to the energy storage battery box (4) through the high-voltage bus. According to the actual power demand of the vehicle, the high-voltage electricity is converted into low-voltage or 220V or 380V AC electricity. The system controller (2) determines whether the engine (7) needs to intervene based on the power level of the energy storage battery box (4): If the energy storage battery box (4) has a high power, it will be powered independently by the energy storage battery box (4). The energy storage battery box (4) will be converted into AC high voltage power supply to the external load through the integrated high voltage power distribution and transformer system (5). It can also output low voltage DC power supply to some loads. If the power of the energy storage battery box (4) is lower than a certain design value, the system controller (2) controls the engine (7) to work. The engine (7) supplies energy to the permanent magnet generator (12) and the AC motor (13) through the speed-increasing gearbox (11). The permanent magnet generator (12) generates three-phase power, which is then converted into DC power by the high-voltage inverter (3) to charge the energy storage battery box (4).

2. The high-power engine power take-off and power supply system according to claim 1, characterized in that: The speed-increasing gearbox (11) has one input shaft and two output shafts. One output shaft is used to connect to a generator for high-voltage power generation, and the other output shaft is used to connect to an AC generator for generating low-voltage electricity for the vehicle.

3. The high-power engine power take-off and power supply system according to claim 1, characterized in that: The crankshaft-driven cooling fan of the engine (7) is replaced with an electric fan, and the original single cooling fan is replaced with multiple small-diameter electric fans to save space for the newly added speed-increasing gearbox (11).

4. The high-power engine power take-off and power supply system according to claim 1, characterized in that: The permanent magnet generator (12) is the main power source, which charges the energy storage battery box (4) on the one hand, and supplies power to the integrated high voltage power distribution and transformer system (5) through the energy storage battery box (4) on the other hand.

5. The high-power engine power take-off and power supply system according to claim 1, characterized in that: The alternator (13) is mainly used for emergency low-voltage power supply. When the high-voltage power distribution and transformer system (5) of this system fails and the whole vehicle has no continuous low-voltage power supply, the alternator (13) is temporarily activated by the system controller (2) to convert the kinetic energy of the engine (7) into electrical energy to supply low-voltage power for normal vehicle operation or to supply power to other low-voltage loads.

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