Power system of road working vehicle and road working vehicle

Abstract

The invention discloses a power system of a road operation vehicle and the road operation vehicle, the power system of the road operation vehicle comprises an engine, a power supply assembly and a transmission mechanism, the power supply assembly comprises a generator and a power battery, and the power battery is electrically connected with a chassis driving part, an upper driving part and the generator; the transmission mechanism comprises a planetary gear set and a one-way brake assembly, the planetary gear set is in driving connection with the engine through a planet carrier and is in driving connection with the generator through a sun gear, and a gear ring of the planetary gear set is in one-way driving connection with the upper driving piece through the one-way brake assembly. The power system can drive the upper driving piece through the engine, it is guaranteed that the road operation vehicle can conduct road operation without consuming the electric quantity of a power battery, the power consumption speed of the power battery is greatly reduced, the endurance mileage of the road operation vehicle is prolonged, and the mileage anxiety of a user is relieved.

Description

Technical Field

[0001] The present invention belongs to the technical field of power systems, and in particular relates to a power system of a road working vehicle and the road working vehicle. Background Art

[0002] At present, with the development of new energy technology, sanitation vehicles are gradually tending to adopt pure electric drive mode. However, due to the high purchase price, insufficient cruising range and lack of charging facilities of pure electric sanitation vehicles, they cannot meet the needs of users. Therefore, the use of hybrid power to drive sanitation vehicles is a solution. However, the hybrid system of sanitation vehicles in the prior art usually uses the chassis engine as the power source. The operating upper part of the sanitation vehicle cannot be driven by the chassis engine, and can only be driven by the power battery to supply power to the upper drive parts. As a result, the power battery needs to meet the power supply requirements of both the chassis drive parts and the upper drive parts. The power battery consumes power quickly, and a large-capacity power-type power battery needs to be selected, which greatly increases the cost and easily causes user mileage anxiety. Summary of the invention

[0003] In view of the above-mentioned defects or shortcomings, the present invention provides a power system of a road work vehicle and a road work vehicle, aiming to solve the technical problem of fast power consumption of power batteries of existing sanitation vehicles.

[0004] In order to achieve the above object, the present invention provides a power system of a road working vehicle, the power system of the road working vehicle comprising:

[0005] engine;

[0006] A power supply assembly, including a generator and a power battery, wherein the power battery is electrically connected to the chassis drive component, the upper body drive component and the generator respectively;

[0007] The transmission mechanism includes a planetary gear set and a one-way brake assembly. The planetary gear set is connected to the engine through a planet carrier and is connected to the generator through a sun gear. The ring gear of the planetary gear set is connected to the upper drive member through a one-way brake assembly.

[0008] In an embodiment of the present invention, the one-way brake assembly includes a first brake and a first one-way clutch, the first brake is used to brake the ring gear, and the first one-way clutch is used to provide the ring gear with one-way drive for the upper drive member.

[0009] In an embodiment of the present invention, the power system of the road work vehicle also includes a controller that is communicatively connected to the engine, the generator, the power battery and the first brake respectively, and the controller is configured to control the engine, the generator, the power battery and the first brake respectively according to the power level of the power battery.

[0010] In an embodiment of the present invention, controlling the engine, the generator, the power battery, and the first brake respectively according to the power level of the power battery includes:

[0011] When receiving the upper installation work instruction and determining that the power battery is in a sufficient power state, controlling the power battery to supply power to the upper installation drive component;

[0012] When it is determined that the power battery is in a state of low power, the engine is controlled to run.

[0013] In an embodiment of the present invention, when receiving an upper installation work instruction and determining that the power battery is in a sufficient power state, controlling the power battery to supply power to the upper installation drive component includes:

[0014] When receiving the upper installation work instruction and determining that the power of the power battery is within a first preset power range, controlling the power battery to supply power to the upper installation drive component;

[0015] When receiving a superstructure work instruction and determining that the power battery's power level is within a second preset power range, the power battery is controlled to supply power to the superstructure drive component, the engine is controlled to run, and the first brake is controlled to perform braking; wherein any value in the first preset power range is greater than any value in the second preset power range.

[0016] In an embodiment of the present invention, the transmission mechanism further includes a second one-way clutch, the planet carrier is drivingly connected to the engine through the second one-way clutch, the second one-way clutch is used to allow the planet carrier to drive the transmission part of the engine when the generator rotates forward, and to lock the engine when the generator rotates reversely, and the controller is further configured as follows:

[0017] When it is determined that the power level of the power battery is within a second preset power level range, the generator is controlled to rotate forward to drive the transmission part of the engine to rotate, and the first brake is controlled to brake;

[0018] When the transmission part of the engine rotates for a preset time, the generator is controlled to stop running and the driving part of the engine is controlled to run.

[0019] In an embodiment of the present invention, the controller is further configured to:

[0020] When the first strong working instruction is received and it is determined that the power battery is in a sufficiently charged state, the power battery is controlled to supply power to the upper drive component, the generator is controlled to reverse, and the first brake is controlled to release the brake.

[0021] In an embodiment of the present invention, the controller is further configured to:

[0022] When the second strong working instruction is received and it is determined that the power battery is in a sufficiently charged state, the power battery is controlled to supply power to the upper drive component, the engine is controlled to run, the generator is controlled to reverse, and the first brake is controlled to release the brake.

[0023] In an embodiment of the present invention, when it is determined that the power battery is in a low-power state, controlling the engine to run includes:

[0024] When receiving a bodywork work instruction and determining that the power battery has a power level within a third preset power level range, controlling the engine to run and controlling the first brake to release the brake;

[0025] When it is determined that the power of the power battery is within a fourth preset power range, controlling the engine to run, controlling the first brake to brake, and limiting the power battery from supplying power to the upper drive component;

[0026] When it is determined that the power battery's power level is within the fifth preset power range, the engine is controlled to run, the first brake is controlled to brake, and the power battery is limited from supplying power to the upper drive component and the chassis drive component, wherein any value in the third preset power range is greater than any value in the fourth preset power range, and any value in the fourth preset power range is greater than any value in the fifth preset power range.

[0027] In an embodiment of the present invention, the transmission mechanism further includes a second brake, the sun gear is drivingly connected to the generator via the second brake, the second brake is communicatively connected to the controller and is used to brake the sun gear, and the controller is further configured as:

[0028] When a bodywork work instruction and a fault signal are received, the engine is controlled to run, the first brake is controlled to release the brake, and the second brake is controlled to brake.

[0029] In order to achieve the above object, the present invention further provides a road working vehicle, which comprises the power system of the road working vehicle described above.

[0030] Through the above technical solution, the power system of the road working vehicle and the road working vehicle provided by the embodiment of the present invention have the following beneficial effects:

[0031] In the technical solution of the present invention, the chassis drive is electrically connected to the power battery, and the power battery can supply power to the chassis drive and drive the chassis drive; the upper drive is electrically connected to the power battery, and the power battery can supply power to the upper drive and drive the upper drive; the engine is connected to the upper drive in a one-way driving manner through the planetary carrier, the ring gear and the one-way brake assembly in sequence, so that the engine can drive the upper drive, and the fuel of the engine is diesel, gasoline, etc., thereby realizing the pure electric drive of the chassis drive and the hybrid power drive of the upper drive. When the power battery is in a state of insufficient power, the power system can drive the upper drive through the engine, and the power battery only needs to supply power to the chassis drive, ensuring that the road work vehicle can continue to perform road work without consuming the power of the power battery, greatly reducing the power consumption rate of the power battery, and the power system can flexibly select a small-capacity power battery only according to the mileage requirements, without the need to be equipped with a power battery, greatly reducing the cost of the power system, and extending the cruising range of the road work vehicle, alleviating the user's mileage anxiety.

[0032] Other features and advantages of the embodiments of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The accompanying drawings are used to provide a further understanding of the embodiments of the present invention and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the embodiments of the present invention, but do not constitute a limitation on the embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on the structures shown in these drawings without creative work. In the accompanying drawings:

[0034] Figure 1 It is a structural schematic diagram of a power battery in a power system according to an embodiment of the present invention, in which the power level of the power battery is within a first preset power level range and the controller receives an installation work instruction;

[0035] Figure 2 It is a structural schematic diagram of a power battery in a power system according to an embodiment of the present invention, in which the power level of the power battery is within a second preset power level range and the controller receives an installation work instruction;

[0036] Figure 3 is a structural schematic diagram of a power battery in a power system according to an embodiment of the present invention, in which the power level is within a second preset power level range;

[0037] Figure 4 is a structural schematic diagram of a power battery in a power system according to an embodiment of the present invention in which the power is sufficient and the controller receives a first strong working instruction;

[0038] Figure 5is a structural schematic diagram of a power battery in a power system according to an embodiment of the present invention having sufficient power and a controller receiving a second strong working instruction;

[0039] Figure 6 It is a structural schematic diagram of a power battery in a power system according to an embodiment of the present invention, in which the power level of the power battery is within a third preset power level range and the controller receives a bodywork work instruction;

[0040] Figure 7 is a structural schematic diagram of a power battery in a power system according to an embodiment of the present invention, in which the power level is within a fourth preset power range;

[0041] Figure 8 is a structural schematic diagram of a power battery in a power system according to an embodiment of the present invention, in which the power level is within a fifth preset power range;

[0042] Fig. 9 is a schematic diagram of a structure in which a controller in a power system receives a bodywork instruction and a fault signal according to an embodiment of the present invention;

[0043] Fig.10 is a structural block diagram of a power system according to an embodiment of the present invention;

[0044] Fig.11 4 is a flow chart of a control method of a power system according to an embodiment of the present invention.

[0045] Description of Reference Numerals

[0046] 10 Engine 40 One-way brake assembly

[0047] 20 Power supply assembly 41 First brake

[0048] 21 Generator 42 First one-way clutch

[0049] 22 Power Battery 50 Controller

[0050] 30 Planetary gear set 60 Second one-way clutch

[0051] 31 Planet carrier 70 Second brake

[0052] 32 Sun gear 200 Chassis drive

[0053] 33 Ring gear 300 Upper drive DETAILED DESCRIPTION

[0054] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0055] The power system of the road working vehicle of the present invention will be described below with reference to the accompanying drawings.

[0056] like Figures 1 to 9 As shown, the present invention provides a power system of a road work vehicle, the power system of the road work vehicle includes an engine 10, a power supply component 20 and a transmission mechanism, the power supply component 20 includes a generator 21 and a power battery 22, the power battery 22 is electrically connected to the chassis drive component 200, the upper drive component 300 and the generator 21 respectively; the transmission mechanism includes a planetary gear set 30 and a one-way brake assembly 40, the planetary gear set 30 is drivingly connected to the engine 10 through a planet carrier 31 and is drivingly connected to the generator 21 through a sun gear 32, and the ring gear 33 of the planetary gear set 30 is unidirectionally drivingly connected to the upper drive component 300 through the one-way brake assembly 40.

[0057] It should be noted that the power system of the embodiment of the present invention can be applied to a road work vehicle, which includes a chassis assembly and a superstructure assembly for performing road work. The chassis assembly includes a chassis drive component 200 for driving the road work vehicle to travel, and the superstructure assembly includes a superstructure drive component 300 for driving the superstructure working mechanism to perform road work. The power system is used to provide power to the chassis drive component 200 and the superstructure drive component 300 respectively, so that the road work vehicle can travel and perform road work.

[0058] Specifically, the chassis drive component 200 is electrically connected to the power battery 22, and the power battery 22 can supply power to the chassis drive component 200 and thereby drive the chassis drive component 200; the upper body drive component 300 is electrically connected to the power battery 22, and the power battery 22 can supply power to the upper body drive component 300 and thereby drive the upper body drive component 300; the engine 10 is unidirectionally drivenly connected to the upper body drive component 300 through the planetary carrier 31, the ring gear 33 and the one-way brake assembly 40 in sequence, so that the engine 10 can drive the upper body drive component 300. The fuel of the engine 10 is diesel, gasoline, etc., thereby realizing pure electric drive of the chassis assembly and hybrid power drive of the upper body assembly. When the power battery 22 is in a state of low power, the power system can drive the upper body drive component 300 through the engine 10, and the power battery 22 only needs to supply power to the chassis drive component 200, ensuring that the upper body assembly can continue to perform road operations without consuming the power of the power battery 22, greatly reducing the power consumption rate of the power battery 22, and the power system can flexibly select a small-capacity power battery 22 based only on the mileage requirements of the chassis assembly, and there is no need to be equipped with a power battery required for the strong operation of the upper body assembly, which greatly reduces the cost of the power system, and extends the cruising range of the chassis assembly, alleviating the user's mileage anxiety.

[0059] In the existing road operation vehicles, taking an 18-ton pure electric washing and sweeping vehicle as an example, the capacity of the power battery 22 needs to reach 210 kWh to meet the power supply requirements of the chassis drive 200 and the upper drive 300, and the upper assembly needs to be equipped with a power battery to meet the power requirements when performing strong road operations. In the power system of the embodiment of the present invention, the engine 10 can drive the upper drive 300 when the power battery 22 is in an insufficient state, and the power battery 22 only needs to supply power to the chassis drive 200, so that the capacity of the power battery 22 only needs to reach 75 kWh to meet the mileage requirements. The engine 10 drives the upper drive 300 so that the power system can meet the power required for strong road operations without being equipped with a power battery, which greatly reduces the cost of the power battery 22 and alleviates the user's mileage anxiety caused by fast power consumption and lack of charging facilities. In addition, the power battery 22 can also supply power to the upper mounted drive component 300. When the power battery 22 is in a fully charged state or the road work vehicle is in an operating area where charging is convenient, the power battery 22 can supply power to the chassis drive component 200 and the upper mounted drive component 300 respectively, thereby reducing the fuel loss of the engine 10 and lowering the cost of use, so that the road work vehicle has the advantages of driving comfort and smoothness of electric drive and low fuel consumption of hybrid power.

[0060] Furthermore, the engine 10 is sequentially connected to the generator 21 through the planetary carrier 31 and the sun gear 32, and the generator 21 is electrically connected to the power battery 22, so that the engine 10 can drive the generator 21, so that the generator 21 charges the power battery 22, further increasing the cruising range, and the chassis drive 200 is completely decoupled from the engine 10 through the planetary gear set 30, realizing the pure electric drive of the chassis drive 200, and improving the driving comfort. In addition, the one-way brake assembly 40 can one-way brake the ring gear 33 when the engine 10 drives the generator 21, so that the engine 10 cannot drive the upper drive 300 through the ring gear 33, and the upper drive 300 cannot drive the ring gear 33 to rotate. The upper drive 300 can be driven by the power battery 22, realizing the power coupling and decoupling of the upper drive 300 with the engine 10 and the power battery 22 respectively, and the driving mode of the upper drive 300 can be switched arbitrarily between the engine 10 fuel drive and the power battery 22 drive, and the use flexibility is high. In addition, the planetary gear set 30 can adopt the planetary gears in the prior art including a planet carrier 31, planetary gears, a sun gear 32 and a ring gear 33. The planetary gear set 30 has a compact structure, is easy to assemble, has high reliability, does not require changes to the chassis assembly structure, and further reduces costs.

[0061] In the embodiment of the present invention, Figures 1 to 9As shown, the one-way brake assembly 40 includes a first brake 41 and a first one-way clutch 42. The first brake 41 is used to brake the ring gear 33, and the first one-way clutch 42 is used to allow the ring gear 33 to drive the upper mounted driving member 300 in one direction. Specifically, the upper mounted driving member 300 can adopt a motor in the prior art, and a gear is provided on the transmission shaft of the upper mounted driving member 300 so that the upper mounted driving member 300 is connected to the ring gear 33 through the gear. The first brake 41 and the first one-way clutch 42 are provided on the transmission shaft of the upper mounted driving member 300. The first brake 41 can brake the ring gear 33 so that the engine 10 cannot drive the upper mounted driving member 300 through the ring gear 33. The first one-way clutch 42 can allow the ring gear 33 to drive the upper mounted driving member 300 when the first brake 41 is released, and prevent the upper mounted driving member 300 from driving in the reverse direction. The ring gear 33 rotates, thereby realizing flexible selection of driving power for the upper drive component 300 according to actual use requirements. When the power battery 22 is fully charged, the upper drive component 300 is electrically driven by the power battery 22. When the engine 10 drives the generator 21 to charge the power battery 22, the first brake 41 can brake the ring gear 33 to electrically drive the upper drive component 300 through the power battery 22, and the first one-way clutch 42 prevents the upper drive component 300 from driving the ring gear 33 in reverse. The first brake 41 can also be released to drive the upper drive component 300 through the engine 10, which is flexible and convenient to use.

[0062] In the embodiment of the present invention, Fig.10 As shown, the power system of the road work vehicle also includes a controller 50 that is communicatively connected to the engine 10, the generator 21, the power battery 22 and the first brake 41 respectively, and the controller 50 is configured to control the engine 10, the generator 21, the power battery 22 and the first brake 41 respectively according to the power level of the power battery 22. Specifically, the controller 50 is communicatively connected with the engine 10, the generator 21 and the power battery 22 via the CAN bus, and the controller 50 is communicatively connected with the first brake 41 via the EMS hard line. The controller 50 can obtain the state of charge (SOC, State of Charge) of the power battery 22, and control the start and stop of the engine 10, the start and stop of the generator 21, the power supply of the power battery 22, the limiting of the power supply of the power battery 22, the braking of the first brake 41, and the release of the first brake 41 according to the power level of the power battery 22, thereby realizing the flexible selection of electric drive and fuel drive of the upper drive part 300, and realizing the charging of the power battery 22 according to the power level of the power battery 22, effectively alleviating mileage anxiety, reducing costs, and having the advantages of high automation and intelligence.

[0063] In the embodiment of the present invention, controlling the engine 10, the generator 21, the power battery 22 and the first brake 41 respectively according to the power level of the power battery 22 includes:

[0064] When receiving the upper installation work instruction and determining that the power battery 22 is in a sufficient power state, controlling the power battery 22 to supply power to the upper installation drive component 300;

[0065] When it is determined that the power battery 22 is in an insufficient power state, the engine 10 is controlled to run.

[0066] Specifically, the controller 50 is further configured to obtain the power of the power battery 22, and determine whether the power battery 22 is in a sufficient power state or an insufficient power state according to the power of the power battery 22. When it is determined that the power battery 22 is in a sufficient power state, the power of the power battery 22 is sufficient to supply the chassis drive 200 and the upper body drive 300. When road work is required, the controller 50 receives the upper body work instruction, and controls the power battery 22 to supply power to the upper body drive 300 according to the upper body work instruction, so that the upper body drive 300 operates to perform road work, thereby realizing the electric drive of the chassis drive 200 and the upper body drive 300, and reducing fuel consumption and use cost. When it is determined that the power battery 22 is in an insufficient power state, the power of the power battery 22 can only meet the power supply demand of the chassis drive 200. The controller 50 controls the engine 10 to run, so that the engine 10 drives the generator 21 through the planetary carrier 31 and the sun gear 32 in turn. The generator 21 runs and charges the power battery 22 to replenish the power of the power battery 22, thereby extending the cruising range and effectively alleviating the user's mileage anxiety.

[0067] Further, when receiving the upper installation work instruction and determining that the power battery 22 is in a sufficient power state, controlling the power battery 22 to supply power to the upper installation drive component 300 includes:

[0068] When receiving the upper installation work instruction and determining that the power of the power battery 22 is within the first preset power range, controlling the power battery 22 to supply power to the upper installation drive component 300;

[0069] When receiving the upper installation work instruction and determining that the power battery 22 is within the second preset power range, the power battery 22 is controlled to supply power to the upper installation drive component 300, the engine 10 is controlled to run, and the first brake 41 is controlled to brake; wherein any value in the first preset power range is greater than any value in the second preset power range.

[0070] Specifically, the controller 50 is also configured to determine whether the power battery 22 is in a first preset power range or a second preset power range when determining that the power battery 22 is in a sufficiently charged state, wherein the first preset power range can be set to be above 50%, and the second preset power range can be set to be above 20% and less than 50%, and the first preset power range and the second preset power range can be flexibly set according to actual usage requirements, and the embodiment of the present invention does not limit the first preset power range and the second preset power range.

[0071] like Figure 1 As shown, when it is determined that the power level of the power battery 22 is within the first preset power range, the power level of the power battery 22 is sufficient to supply the chassis drive 200 and the upper drive 300, and the power battery 22 does not need to be replenished. When road operations are required, the controller 50 receives the upper work instructions, and controls the power battery 22 to supply power to the upper drive 300 according to the upper work instructions, so that the upper drive 300 can operate to perform road operations, thereby realizing the electric drive of the chassis drive 200 and the upper drive 300, and reducing fuel consumption and use costs.

[0072] like Figure 2 As shown, when it is determined that the power of the power battery 22 is within the second preset power range, the power of the power battery 22 is sufficient to supply the chassis drive 200 and the upper drive 300, and the power battery 22 needs to be replenished, the controller 50 controls the engine 10 to run and controls the first brake 41 to brake, so that the engine 10 charges the power battery 22 by driving the generator 21 to replenish the power of the power battery 22, and the first brake 41 brakes the ring gear 33 to prevent the engine 10 from driving the upper drive 300 through the ring gear 33; when road work is required, the controller 50 receives the upper work instruction, and controls the power battery 22 to supply power to the upper drive 300 according to the upper work instruction, and the first one-way clutch 42 is used to prevent the upper drive 300 from driving the ring gear 33 to rotate in the reverse direction, ensuring that the upper drive 300 can be operated by electric drive to perform road work, realizing the electric drive of the chassis drive 200 and the upper drive 300, and replenishing the power of the power battery 22, thereby extending the cruising range.

[0073] In the embodiment of the present invention, Figures 1 to 9 As shown, the transmission mechanism further includes a second one-way clutch 60, and the planet carrier 31 is drivingly connected to the engine 10 through the second one-way clutch 60. The second one-way clutch 60 is used to allow the planet carrier 31 to drive the transmission part of the engine 10 when the generator 21 rotates forward, and to lock the engine 10 when the generator 21 rotates reversely. The controller 50 is also configured as follows:

[0074] When it is determined that the power level of the power battery 22 is within the second preset power level range, the generator 21 is controlled to rotate forward to drive the transmission part of the engine 10 to rotate, and the first brake 41 is controlled to brake;

[0075] When the transmission part of the engine 10 rotates for a preset time, the generator 21 is controlled to stop running and the driving part of the engine 10 is controlled to run.

[0076] Specifically, the second one-way clutch 60 is used to limit the generator 21 from driving the engine 10 in the reverse direction through the planetary gear set 30 in the case of reverse rotation, so that the generator 21 can only drive the transmission part of the engine 10 to rotate through the sun gear 32 and the planet carrier 31 in sequence in the case of forward rotation, and the driving part of the engine 10 is used to drive the transmission part of the engine 10, so that the transmission part of the engine 10 can drive the generator 21 to charge the power battery 22 in sequence through the planet carrier 31 and the sun gear 32. The controller 50 is also configured to determine whether the power of the power battery 22 is within a second preset power range when it is determined that the power battery 22 is in a sufficient power state.

[0077] like Figure 3 As shown, when it is determined that the power of the power battery 22 is within the second preset power range, the power of the power battery 22 needs to be replenished, and the controller 50 first controls the generator 21 to rotate forward, so that the generator 21 drags the transmission part of the engine 10 in reverse through the sun gear 32 and the planetary carrier 31 in turn. After the generator 21 drives the transmission part of the engine 10 to rotate for a preset time, the controller 50 controls the generator 21 to stop running and controls the driving part of the engine 10 to run, so that the driving part of the engine 10 drives the transmission part of the engine 10 to rotate, and then the transmission part of the engine 10 drives the generator 21 through the planetary carrier 31 and the sun gear 32 in turn to charge the power battery 22. In the embodiment of the present invention, when the power battery 22 needs to be replenished, it first reversely drags the engine 10 through the generator 21, so that the engine 10 can be quickly started in the high-efficiency operating range according to the universal characteristics, that is, the starting speed and load of the engine 10 are adjusted by the generator 21, so that the engine 10 can operate in the high-efficiency operating range, further reducing fuel consumption, and there is no need to additionally equip a motor for starting the engine 10. The engine 10 can be quickly started only by the generator 21, the planetary gear set 30 and the second one-way clutch 60, further reducing costs and saving installation space.

[0078] It can be understood that the generator 21 rotates forward and reverses to drag the engine 10 only to assist the engine 10 to start quickly, so that the engine 10 can operate in the high-efficiency operating range. After the speed of the engine 10 is adjusted to a suitable range, the controller 50 controls the generator 21 to stop, and controls the drive unit of the engine 10 to consume fuel to drive the transmission unit, so that the transmission unit of the engine 10 charges the power battery 22 through the generator 21, thereby replenishing the power of the power battery 22; and when the generator 21 rotates forward or the drive unit of the engine 10 is running, the first brake 41 is controlled to brake to prevent the generator 21 or the engine 10 from driving the upper drive member 300 to run through the ring gear 33. The drive of the upper drive member 300 is powered by the power battery 22, thereby reducing the fuel consumption of the engine 10.

[0079] In the embodiment of the present invention, when it is determined that the power battery 22 is in an insufficient power state, controlling the engine 10 to run includes:

[0080] When receiving the upper installation work instruction and determining that the power of the power battery 22 is within the third preset power range, controlling the engine 10 to run and controlling the first brake 41 to release the brake;

[0081] When it is determined that the power of the power battery 22 is within the fourth preset power range, the engine 10 is controlled to run, the first brake 41 is controlled to brake, and the power battery 22 is limited to supply power to the upper drive member 300;

[0082] When it is determined that the power level of the power battery 22 is within the fifth preset power range, the engine 10 is controlled to run, the first brake 41 is controlled to brake, and the power battery 22 is limited to supply power to the upper drive component 300 and the chassis drive component 200, wherein any value in the third preset power range is greater than any value in the fourth preset power range, and any value in the fourth preset power range is greater than any value in the fifth preset power range.

[0083] Specifically, the controller 50 is also configured to determine whether the power battery 22 is in a third preset power range, a fourth preset power range or a fifth preset power range when determining that the power battery 22 is in a low power state, wherein the third preset power range can be set to be greater than 10% and less than 20%, the fourth preset power range can be set to be greater than 5% and less than 10%, and the fifth preset power range can be set to be less than 5%. The third preset power range, the fourth preset power range and the fifth preset power range can be flexibly set according to actual usage requirements. The embodiment of the present invention does not limit the third preset power range, the fourth preset power range and the fifth preset power range.

[0084] like Figure 6As shown, when it is determined that the power of the power battery 22 is within the third preset power range, the power battery 22 needs to be replenished, and the controller 50 controls the engine 10 to run, so that the engine 10 charges the power battery 22 by driving the generator 21 to replenish the power of the power battery 22; when road work is required, the controller 50 receives the upper body working instruction, and controls the first brake 41 to release the brake according to the upper body working instruction, so that the engine 10 drives the upper body drive component 300 to run through the planetary carrier 31 and the ring gear 33 in turn, thereby realizing the fuel drive of the upper body drive component 300. The upper body drive component 300 does not need to consume the power of the power battery 22, thereby reducing the power consumption rate of the power battery 22, extending the driving mileage, and alleviating the user's mileage anxiety.

[0085] like Figure 7 As shown, when it is determined that the power of the power battery 22 is within the fourth preset power range, the power of the power battery 22 can only supply the chassis drive 200, and the power battery 22 needs to be replenished, the controller 50 controls the engine 10 to run and limits the power battery 22 to supply power to the upper mounted drive 300, so that the engine 10 charges the power battery 22 by driving the generator 21 to replenish the power of the power battery 22, and the power battery 22 can only supply power to the chassis drive 200 to drive the road working vehicle to travel, and cannot supply power to the upper mounted drive 300 to prevent power loss; and the engine 10 is used to drive the generator 21 first to ensure the mileage of the road working vehicle, the controller 50 controls the first brake 41 to brake the ring gear 33 to prevent the engine 10 from driving the upper mounted drive 300 through the ring gear 33, even if the controller 50 receives the upper mounted work instruction, it will not drive the upper mounted drive 300 through the engine 10 or the power battery 22, that is, when the power of the power battery 22 is within the fourth preset power range, the upper mounted assembly is prohibited from performing road work, thereby ensuring the cruising range and improving driving reliability.

[0086] like Figure 8As shown, when it is determined that the power of the power battery 22 is within the fifth preset power range, the power of the power battery 22 is seriously insufficient and needs to be supplemented urgently, the controller 50 controls the engine 10 to operate so that the engine 10 drives the generator 21, and the generator 21 charges the power battery 22 to supplement the power of the power battery 22, and the controller 50 controls the first brake 41 to brake the ring gear 33 to prevent the engine 10 from driving the upper drive 300 through the ring gear 33, thereby reducing fuel loss. In addition, the controller 50 limits the power battery 22 from supplying power to the chassis drive 200 and the upper drive 300, so that the road work vehicle stops for charging, that is, when the power of the power battery 22 is within the fifth preset power range, the road work vehicle is prohibited from driving and the upper assembly is prohibited from performing road work, and the vehicle can only drive after the power of the power battery 22 is supplemented to exceed the fifth preset power range, thereby greatly improving driving safety.

[0087] Reference Fig.11 , is a flow chart of a control method of a power system according to an embodiment of the present invention, wherein the controller 50 is further configured as follows:

[0088] Step S10, obtaining the power level of the power battery 22, and determining whether the power level of the power battery 22 is within a first preset power range;

[0089] Step S20, when receiving the upper installation work instruction and determining that the power of the power battery 22 is within the first preset power range, controlling the power battery 22 to supply power to the upper installation drive component 300;

[0090] Step S30, when it is determined that the power level of the power battery 22 is outside the first preset power level range, determining whether the power level of the power battery 22 is within a second preset power level range;

[0091] Step S40, when it is determined that the power level of the power battery 22 is within the second preset power level range, the generator 21 is controlled to rotate forward to drive the transmission part of the engine 10 to rotate, and the first brake 41 is controlled to brake;

[0092] Step S41, when the transmission part of the engine 10 rotates for a preset time, the generator 21 is controlled to stop running and the driving part of the engine 10 is controlled to run;

[0093] Step S42, when receiving the upper installation work instruction, controlling the power battery 22 to supply power to the upper installation driving component 300;

[0094] Step S50, when it is determined that the power level of the power battery 22 is outside the second preset power level range, determining whether the power level of the power battery 22 is within a third preset power level range;

[0095] Step S60, when receiving the upper installation work instruction and determining that the power of the power battery 22 is within the third preset power range, controlling the engine 10 to run and controlling the first brake 41 to release the brake;

[0096] Step S70, when it is determined that the power level of the power battery 22 is outside the third preset power level range, determining whether the power level of the power battery 22 is within a fourth preset power level range;

[0097] Step S80, when it is determined that the power of the power battery 22 is within the fourth preset power range, controlling the engine 10 to run, controlling the first brake 41 to brake, and limiting the power battery 22 from supplying power to the upper drive member 300;

[0098] Step S90, when it is determined that the power level of the power battery 22 is outside the fourth preset power level range, determining whether the power level of the power battery 22 is within a fifth preset power level range;

[0099] Step S100, when it is determined that the power level of the power battery 22 is within the fifth preset power range, the engine 10 is controlled to run, the first brake 41 is controlled to brake, and the power battery 22 is limited to supply power to the upper drive component 300 and the chassis drive component 200.

[0100] Specifically, the engine 10, the generator 21 and the upper mounted drive member 300 are coupled through the planetary gear set 30, and the generator 21, the chassis drive member 200 and the upper mounted drive member 300 are all electrically connected to the power battery 22, so that different control strategies are adopted according to the power of the power battery 22 to drive the upper mounted drive member 300 and charge the power battery 22, thereby realizing multiple working modes such as the chassis drive member 200 and the upper mounted drive member 300 are both electrically driven, the engine 10 starts quickly in the high-efficiency operating range and charges the power battery 22 by driving the generator 21, the upper mounted drive member 300 is fuel driven, the upper mounted drive member 300 is prohibited from running and charges the power battery 22, and the upper mounted drive member 300 is parked for charging. While meeting the different operating requirements of the upper mounted assembly, the power supply of the chassis assembly is guaranteed, the user's mileage anxiety is alleviated, the degree of intelligence is high, the engine 10 fuel and the power of the power battery 22 are reasonably utilized, and the combination of the engine 10, the generator 21 and the upper mounted drive member 300 enables the road operation vehicle to always operate in the most efficient range. Furthermore, the planetary gear set 30 can reduce the power and torque requirements of the upper-mounted driving member 300 through the design of the speed ratio, further saving fuel loss. In addition, it can be understood that when the power of the power battery 22 is within the fourth preset power range, the upper-mounted assembly is prohibited from performing road operations and charging the power battery 22. When the power of the power battery 22 is replenished to exceed the preset recovery operation power, the upper-mounted driving member 300 can be driven again to restore the upper-mounted assembly to perform road operations, further improving the degree of automation and intelligence.

[0101] In an embodiment of the present invention, the controller 50 is also configured to: upon receiving a first strong working instruction and determining that the power battery 22 is in a sufficiently charged state, control the power battery 22 to supply power to the upper drive component 300, control the generator 21 to reverse, and control the first brake 41 to release the brake.

[0102] Specifically, Figure 4As shown, when it is determined that the power battery 22 is in a fully charged state, the power of the power battery 22 is sufficient to supply the chassis drive 200 and the upper drive 300, and the power system also has a first strong working mode. When it is necessary to enter the first strong working mode, the controller 50 receives the first strong working instruction, and controls the power battery 22 to supply power to the upper drive 300 according to the first working instruction, so that the power battery 22 electrically drives the upper drive 300, and the controller 50 controls the generator 21 to reverse and controls the first brake 41 to release the brake. The generator 21 reverses and cannot reversely drag the engine 10 under the action of the second one-way clutch 60. The generator 21 can only drive the upper drive 300 through the sun gear 32, the ring gear 33 and the first brake 41 that releases the brake in sequence, so that the upper drive 300 can be synchronously driven by the power battery 22 and the generator 21, so that the upper drive 300 can strongly drive the upper assembly to perform road functions, which is beneficial to improving the working effect and improving the working efficiency.

[0103] Furthermore, the controller 50 is also configured to: upon receiving a second strong working instruction and determining that the power battery 22 is in a sufficiently charged state, control the power battery 22 to supply power to the upper drive component 300, control the engine 10 to run, control the generator 21 to reverse, and control the first brake 41 to release the brake.

[0104] Specifically, Figure 5 As shown, when it is determined that the power battery 22 is in a fully charged state, the power of the power battery 22 is sufficient to supply the chassis drive 200 and the upper drive 300, and the power system also has a second strong working mode. When it is necessary to enter the second strong working mode, the controller 50 receives the second strong working instruction, and controls the power battery 22 to supply power to the upper drive 300 according to the second working instruction, so that the power battery 22 electrically drives the upper drive 300, and the controller 50 controls the generator 21 to reverse and controls the first brake 41 to release the brake. The generator 21 reverses and drives the upper drive 300 through the sun gear 32, the ring gear 33 and the first brake 41 that releases the brake. In addition, the controller 50 also controls the engine 10 to run, so that the engine 10 further increases the driving force of the upper drive 300 through the planetary carrier 31 and the ring gear 33 in turn, so that the upper drive 300 further enhances the drive of the upper assembly on the basis of the first strong working mode, greatly improving the operating effect of the upper assembly and accelerating the operating speed of the upper assembly.

[0105] In the embodiment of the present invention, Fig. 9As shown, the transmission mechanism also includes a second brake 70, the sun gear 32 is drivingly connected to the generator 21 via the second brake 70, the second brake 70 is communicatively connected to the controller 50 and is used to brake the sun gear 32, and the controller 50 is also configured to: upon receiving an upper installation work instruction and a fault signal, control the engine 10 to run, control the first brake 41 to release the brake, and control the second brake 70 to brake.

[0106] Specifically, Fig. 9 As shown, the second brake 70 can brake the sun gear 32, so that the engine 10 cannot drive the generator 21 through the sun gear 32. When the controller 50 receives a fault signal, in order to ensure the mileage of the road work vehicle and reduce the power loss of the power battery 22, the upper drive member 300 can only be driven by the engine 10. When road work is required, the controller 50 receives the upper work instruction, and controls the engine 10 to run, controls the first brake 41 to release the brake, and controls the second brake 70 to brake according to the upper work instruction, so that the engine 10 can drive the upper drive member 300 through the planet carrier 31 and the ring gear 33 in turn, and the engine 10 cannot drive the generator 21, which reduces fuel consumption and ensures that the upper drive member 300 is driven by fuel and the chassis drive member 200 is driven by electricity in the case of a fault, and the structure is stable and reliable. In addition, the embodiment of the present invention brakes the ring gear 33 by the first brake 41 and the sun gear 32 by the second brake 70, thereby achieving independent driving of the upper drive member 300 and the generator 21, without the need for the generator 21 to rotate or the upper drive member 300 to rotate, further reducing energy consumption and improving transmission efficiency.

[0107] In addition, the present invention also provides a road work vehicle, which can be a washing and sweeping vehicle, a cleaning vehicle, a sanitation vehicle, etc. The road work vehicle includes a power system according to the road work vehicle described above, and the specific structure of the power system refers to the above embodiment. Since the road work vehicle adopts all the technical solutions of the above embodiment, it at least has all the beneficial effects brought by the technical solutions of the above embodiment, which will not be repeated here one by one.

[0108] In the description of the present invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0109] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0110] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0111] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A power system for a road working vehicle, characterized in that: The power system of the road working vehicle comprises: Engine (10); A power supply assembly (20) comprises a generator (21) and a power battery (22), wherein the power battery (22) is electrically connected to a chassis drive component (200), a top drive component (300) and the generator (21) respectively; The transmission mechanism comprises a planetary gear set (30) and a one-way brake assembly (40); the planetary gear set (30) is drivingly connected to the engine (10) via a planet carrier (31), and is drivingly connected to the generator (21) via a sun gear (32); and the ring gear (33) of the planetary gear set (30) is one-way drivingly connected to the upper drive member (300) via the one-way brake assembly (40).

2. The power system of the road working vehicle according to claim 1, characterized in that: The one-way brake assembly (40) comprises a first brake (41) and a first one-way clutch (42); the first brake (41) is used to brake the ring gear (33); and the first one-way clutch (42) is used to allow the ring gear (33) to drive the upper drive member (300) in one direction.

3. The power system of the road working vehicle according to claim 2, characterized in that: The power system of the road work vehicle further comprises a controller (50) which is communicatively connected to the engine (10), the generator (21), the power battery (22) and the first brake (41) respectively, and the controller (50) is configured to control the engine (10), the generator (21), the power battery (22) and the first brake (41) respectively according to the power level of the power battery (22).

4. The power system of the road working vehicle according to claim 3, characterized in that: The controlling of the engine (10), the generator (21), the power battery (22) and the first brake (41) respectively according to the power level of the power battery (22) comprises: When receiving a load-bearing work instruction and determining that the power battery (22) is in a state of sufficient power, controlling the power battery (22) to supply power to the load-bearing drive component (300); When it is determined that the power battery (22) is in an insufficient power state, the engine (10) is controlled to operate.

5. The power system of the road working vehicle according to claim 4, characterized in that: When receiving the upper installation work instruction and determining that the power battery (22) is in a state of sufficient power, controlling the power battery (22) to supply power to the upper installation drive component (300) comprises: When the upper-mounted work instruction is received and it is determined that the power level of the power battery (22) is within a first preset power range, controlling the power battery (22) to supply power to the upper-mounted driving component (300); When receiving the upper body working instruction and determining that the power level of the power battery (22) is within a second preset power range, the power battery (22) is controlled to supply power to the upper body drive component (300), the engine (10) is controlled to run, and the first brake (41) is controlled to brake; wherein any value in the first preset power range is greater than any value in the second preset power range.

6. The power system of the road working vehicle according to claim 5, characterized in that: The transmission mechanism further comprises a second one-way clutch (60), the planet carrier (31) is drivingly connected to the engine (10) via the second one-way clutch (60), the second one-way clutch (60) is used to allow the planet carrier (31) to drive the transmission part of the engine (10) when the generator (21) rotates forward, and to lock the engine (10) when the generator (21) rotates reversely, and the controller (50) is further configured as follows: When it is determined that the power level of the power battery (22) is within the second preset power level range, the generator (21) is controlled to rotate forward to drive the transmission part of the engine (10) to rotate, and the first brake (41) is controlled to brake; When the transmission part of the engine (10) rotates for a preset time, the generator (21) is controlled to stop running and the driving part of the engine (10) is controlled to run.

7. The power system of the road working vehicle according to claim 6, characterized in that: The controller (50) is also configured to: When receiving a first strong working instruction and determining that the power battery (22) is in the sufficient power state, controlling the power battery (22) to supply power to the upper drive component (300), controlling the generator (21) to reverse, and controlling the first brake (41) to release the brake; And / or, the controller (50) is further configured to: When a second strong working instruction is received and it is determined that the power battery (22) is in the sufficient power state, the power battery (22) is controlled to supply power to the upper drive component (300), the engine (10) is controlled to run, the generator (21) is controlled to reverse, and the first brake (41) is controlled to release the brake.

8. The power system of a road working vehicle according to any one of claims 4 to 7, characterized in that: When it is determined that the power battery (22) is in a state of insufficient power, controlling the engine (10) to operate comprises: When the upper installation work instruction is received and it is determined that the power level of the power battery (22) is within a third preset power range, controlling the engine (10) to run and controlling the first brake (41) to release the brake; When it is determined that the power level of the power battery (22) is within a fourth preset power level range, controlling the engine (10) to run, controlling the first brake (41) to brake, and limiting the power battery (22) from supplying power to the upper drive component (300); When it is determined that the power level of the power battery (22) is within a fifth preset power range, the engine (10) is controlled to run, the first brake (41) is controlled to brake, and the power battery (22) is restricted from supplying power to the upper drive component (300) and the chassis drive component (200), wherein any value in the third preset power range is greater than any value in the fourth preset power range, and any value in the fourth preset power range is greater than any value in the fifth preset power range.

9. The power system of a road working vehicle according to any one of claims 4 to 7, characterized in that: The transmission mechanism further comprises a second brake (70), the sun gear (32) is drivingly connected to the generator (21) via the second brake (70), the second brake (70) is communicatively connected to the controller (50) and is used to brake the sun gear (32), and the controller (50) is further configured as follows: When the upper installation work instruction and the fault signal are received, the engine (10) is controlled to run, the first brake (41) is controlled to release the brake, and the second brake (70) is controlled to brake.

10. A road working vehicle, characterized in that: The road work vehicle comprises a power system for a road work vehicle according to any one of claims 1 to 9.

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