CN112013087A - Speed change device and speed change method - Google Patents
Speed change device and speed change method Download PDFInfo
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- CN112013087A CN112013087A CN202010932786.6A CN202010932786A CN112013087A CN 112013087 A CN112013087 A CN 112013087A CN 202010932786 A CN202010932786 A CN 202010932786A CN 112013087 A CN112013087 A CN 112013087A
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- driving motor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H3/00—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion
- F16H3/44—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion using gears having orbital motion
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H2200/00—Transmissions for multiple ratios
- F16H2200/003—Transmissions for multiple ratios characterised by the number of forward speeds
- F16H2200/0043—Transmissions for multiple ratios characterised by the number of forward speeds the gear ratios comprising four forward speeds
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H2200/00—Transmissions for multiple ratios
- F16H2200/20—Transmissions using gears with orbital motion
- F16H2200/2002—Transmissions using gears with orbital motion characterised by the number of sets of orbital gears
- F16H2200/2007—Transmissions using gears with orbital motion characterised by the number of sets of orbital gears with two sets of orbital gears
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H2200/00—Transmissions for multiple ratios
- F16H2200/20—Transmissions using gears with orbital motion
- F16H2200/203—Transmissions using gears with orbital motion characterised by the engaging friction means not of the freewheel type, e.g. friction clutches or brakes
- F16H2200/2035—Transmissions using gears with orbital motion characterised by the engaging friction means not of the freewheel type, e.g. friction clutches or brakes with two engaging means
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- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
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Abstract
The invention relates to the technical field of vehicle speed change, in particular to a speed change device and a speed change method for pure electric transmission and hybrid power transmission, wherein the speed change device comprises a first driving motor, a second driving motor, a first planet row, a second planet row, an output shaft and a brake; the first planet row comprises a first sun gear, a first gear ring and a first planet carrier; the second planet row comprises a second sun gear, a second gear ring and a second planet carrier; the first driving motor is connected with the first sun gear, the second driving motor is connected with the second sun gear, the first gear ring is connected with the second planet carrier, the output shaft is connected with the first planet carrier, the output shaft is connected with the second gear ring, the brake is connected with the first gear ring, the brake is connected with the second planet carrier, and the unpowered interrupt output of a plurality of gears can be realized only by operating one brake control mechanism and a motor control program.
Description
Technical Field
The invention relates to the technical field of vehicle speed change, in particular to a speed change device and a speed change method for pure electric transmission and hybrid power transmission.
Background
The driving mode of the new energy automobile is mostly a scheme of adding a speed reducer or a gearbox by a single motor at present, and as the gearbox of the new energy automobile does not have a mature solution at present on the reliability of a gear shifting mechanism, most of the new energy automobile adopts a speed reducer scheme with a fixed speed ratio.
In the process of implementing the invention, the inventor finds that the existing mainstream single-motor reinforced fixed-speed-ratio speed reducer technology at least has the following problems:
firstly, under the conditions of low speed, high speed and light load and the like, the efficiency of a single motor is reduced by 20-30% compared with that of a high-efficiency section of the motor, although the high-efficiency section of the motor is much larger than that of an internal combustion engine, when an automobile runs under various road conditions, the requirements on the rotating speed and the torque of power are wide, strong acceleration performance and climbing capacity need large torque, and high-speed running has very high requirements on the rotating speed range, although the efficiency of the motor can reach more than 90% under most medium and high-speed working conditions, under the conditions of low speed and heavy load, low speed and light load, high speed and light load and the like.
Second, the efficiency of braking energy recovery is low
The driving efficiency and the recovery efficiency of the motor are the same, and the driving efficiency is the driving efficiency when the motor works in the electric mode, and the recovery efficiency is the recovery efficiency when the motor works in the power generation mode. Under the conditions of low-speed heavy load, low-speed light load, high-speed light load and the like of the automobile, the energy recovery efficiency of the motor is low.
Thirdly, the weight is heavy and the cost is high
If a single motor needs to meet the requirement of high performance, namely, the high torque and high rotating speed range are considered, the design and manufacture difficulty of the motor is high, the total weight is large, and the cost is high. If two motors meeting the requirements of high torque and high rotating speed are combined into one motor, one motor with 40kW or so and one motor with 30kW or so must be replaced by one motor with 100kW or even higher performance indexes, and the total weight needs to be increased by 30 percent or more.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: a speed change device and a speed change method with simple control, high efficiency and no power interruption are provided.
In order to solve the technical problems, the invention adopts the technical scheme that:
a speed change device comprises a first driving motor, a second driving motor, a first planet row, a second planet row, an output shaft and a brake;
the first planet row comprises a first sun gear, a first gear ring and a first planet carrier;
the second planet row comprises a second sun gear, a second gear ring and a second planet carrier;
the first driving motor is connected with the first sun gear, the second driving motor is connected with the second sun gear, the first gear ring is connected with the second planet carrier, the output shaft is connected with the first planet carrier, the output shaft is connected with the second gear ring, the brake is connected with the first gear ring, and the brake is connected with the second planet carrier.
The invention also relates to a speed change device, which comprises a first driving motor, a second driving motor, a first planet row, a second planet row, an output shaft and a brake;
the first planet row comprises a first sun gear, a first gear ring and a first planet carrier;
the second planet row comprises a second sun gear, a second gear ring and a second planet carrier;
the first driving motor is connected with the first sun gear, the second driving motor is connected with the first gear ring, the first gear ring is connected with the second planet carrier, the output shaft is connected with the first planet carrier, the output shaft is connected with the second gear ring, and the brake is connected with the second sun gear.
The present invention also relates to a shifting method of a transmission device, including:
under the working condition of low speed and light load, the brake is closed, any one of the first drive motor or the second drive motor outputs power to the output shaft, and the other motor idles;
under the working condition of low speed and heavy load, the brake is closed, and the first driving motor and the second driving motor output power to the output shaft through torque coupling;
under the high-speed working condition, the brake is separated, and the first driving motor and the second driving motor output power to the output shaft through rotating speed coupling.
According to the braking energy recovery working condition, one or more combinations of the four gears are adopted according to the actual road condition requirements, and the requirements on recovery strength and comfort are balanced.
The invention has the beneficial effects that: according to the technical scheme, the two driving motors are designed to be in a specific planetary gear transmission structure, so that the rotating speed coupling or torque coupling of the two motors can be realized, the overall efficiency of a power system can be improved under a low-speed light-load working condition, a low-speed heavy-load working condition or a high-speed working condition, and the unpowered interrupt output of a plurality of gears can be realized only by operating one brake control mechanism and one motor control program, so that the complex gear shifting execution and control mechanism is avoided, and the advantages of simplicity in manufacturing, low cost, high reliability and the like are realized; the gear shifting process is smooth, impact caused by gear shifting power interruption is avoided, and comfort is improved.
Drawings
Fig. 1 is a schematic structural diagram of a transmission provided in embodiment 1 of the present invention;
fig. 2 is a schematic structural view of a transmission according to embodiment 2 of the present invention;
fig. 3 is a schematic structural view of a transmission according to embodiment 3 of the present invention;
fig. 4 is a schematic structural view of a transmission according to embodiment 4 of the present invention;
description of reference numerals:
1. a first drive motor; 2. a second drive motor; 3. a first planet row; 31. a first sun gear; 32. a first ring gear; 33. a first carrier; 4. a second planet row; 41. a second sun gear; 42. a second ring gear; 43. a second planet carrier; 5. an output shaft; 6. a brake; 7. an internal combustion engine; 8. a clutch.
Detailed Description
In order to explain technical contents, achieved objects, and effects of the present invention in detail, the following description is made with reference to the accompanying drawings in combination with the embodiments.
Referring to fig. 1 to 4, the present invention relates to a transmission device, which includes a first driving motor 1, a second driving motor 2, a first planetary row 3, a second planetary row 4, an output shaft 5 and a brake 6;
the first planetary row 3 comprises a first sun gear 31, a first ring gear 32 and a first planet carrier 33;
the second planetary row 4 comprises a second sun gear 41, a second ring gear 42 and a second planet carrier 43;
the first driving motor 1 is connected with the first sun gear 31, the second driving motor 2 is connected with the second sun gear 41, the first gear ring 32 is connected with the second planet carrier 43, the output shaft 5 is connected with the first planet carrier 33, the output shaft 5 is connected with the second gear ring 42, the brake 6 is connected with the first gear ring 32, and the brake 6 is connected with the second planet carrier 43.
The invention also relates to a speed change device, which comprises a first driving motor 1, a second driving motor 2, a first planet row 3, a second planet row 4, an output shaft 5 and a brake 6; the first planetary row 3 comprises a first sun gear 31, a first ring gear 32 and a first planet carrier 33; the second planetary row 4 comprises a second sun gear 41, a second ring gear 42 and a second planet carrier 43; the first driving motor 1 is connected with the first sun gear 31, the second driving motor 2 is connected with the first gear ring 32, the first gear ring 32 is connected with the second planet carrier 43, the output shaft 5 is connected with the first planet carrier 33, the output shaft 5 is connected with the second gear ring 42, and the brake 6 is connected with the second sun gear 41.
The present invention also relates to a shifting method of a transmission device, including:
under the working condition of low speed and light load, the brake 6 is closed, any one of the first driving motor 1 or the second driving motor 2 outputs power to the output shaft 5, and the other motor idles;
under the working condition of low speed and heavy load, the brake 6 is closed, and the first driving motor 1 and the second driving motor 2 output power to the output shaft 5 through torque coupling;
under the high-speed working condition, the brake 6 is separated, and the first driving motor 1 and the second driving motor 2 output power to the output shaft 5 through the rotating speed coupling.
According to the above description, in the power transmission process, the output shaft of the first driving motor 1 drives the first sun gear 31 to rotate, power is input, the output shaft of the second driving motor 2 drives the second sun gear 41 to rotate, and power is input and is output by the output shaft 5 connected with the first planet carrier 33 and the second gear ring 42 after torque or rotational speed coupling.
Further, in the above-described transmission structure, the brake 6 is a wet brake 6 or a dry brake 6, the brake 6 is a self-energizing brake 6 or a non-self-energizing brake 6, and the brake 6 is an electric brake 6, a pneumatic brake 6, or a hydraulic brake 6.
As can be seen from the above description, the brake 6 used in the present invention can be any brake 6 structure known in the art.
Further, in the above transmission structure, the first driving motor 1 is a characteristic motor with high efficiency at low rotation speed, and the second driving motor 2 is a characteristic motor with high efficiency at high rotation speed, or the first driving motor 1 is a characteristic motor with high efficiency at high rotation speed, and the second driving motor 2 is a characteristic motor with high efficiency at low rotation speed.
According to the description, the characteristic motor with high efficiency at the low rotating speed and the characteristic motor with high efficiency at the high rotating speed are matched with each other, so that the power system has a wider high-efficiency rotating speed range after the double motors are coupled.
Further, in the above-described transmission structure, which can also be used in a hybrid transmission, the hybrid transmission includes an internal combustion engine 7 and a clutch 8, and the internal combustion engine 7 is connected to the first drive motor 1 or the second drive motor 2 through the clutch 8.
As can be seen from the above description, during the power transmission process, the internal combustion engine 7 drives the output shaft of the first driving motor 1 to rotate through the clutch 8, so as to input power, the output shaft of the first driving motor 1 drives the first sun gear 31 to rotate, the output shaft of the second driving motor 2 drives the second sun gear 41 to rotate, and the input power is coupled by torque or rotation speed, and then is output by the output shaft 5 connected with the first planet carrier 33 and the second ring gear 42.
Deal with different operating modes, still can realize the hybrid output of multiple mode, specifically do:
when the vehicle is in a parking state, the brake 6 is separated, the first driving motor 1 or the second driving motor 2 is used as an ISG motor to start the internal combustion engine 7, or the internal combustion engine 7 drives the first driving motor 1 or the second driving motor 2 to generate electricity, so that the in-situ electricity generation function of the vehicle is realized;
when the vehicle is in a running state and the power battery is seriously insufficient, the brake 6 is closed, and the internal combustion engine 7 simultaneously drives the vehicle, the first driving motor 1 and the second driving motor 2 to generate electricity;
when the vehicle is in a running state and the storage of a power battery is low, the brake 6 is separated, the internal combustion engine 7 simultaneously drives the vehicle and the first driving motor 1 to generate power, the second driving motor 2 outputs power to realize the coupling of the rotating speed of the system, and the vehicle has an inorganic speed change function and runs at a high speed to correspond to an economic cruising working condition;
when the vehicle is in a running state and the electric quantity storage of the power battery is sufficient, the brake 6 is closed, the power of the internal combustion engine 7, the first driving motor 1 and the second driving motor 2 drive the vehicle at the same time, the torque coupling of the system is realized, and the working conditions of heavy load, rapid acceleration or steep slope are met;
the vehicle is in a running state, the electric quantity of the power battery is sufficient, the brake 6 is separated, the power of the internal combustion engine 7, the first driving motor 1 and the second driving motor 2 drive the vehicle at the same time, the coupling of the system rotating speed is realized, and the ultra-high speed working condition is met.
The internal combustion engine 7 drives the two motors to generate power, one motor generates power, the other motor outputs power, the internal combustion engine 7 is coupled with the torques of the two motors, and the internal combustion engine 7 is coupled with the rotating speeds of the two motors, so that the five-mode output of the power system is realized, various working conditions are met, and the overall efficiency of the power system is improved.
Further, in the above-described transmission structure, the power system of the internal combustion engine 7 is a power system using various types of fuel such as gasoline, diesel oil, and LNG.
Further, in the above-described transmission structure, the output mode of the output shaft 5 is a horizontal or vertical stage output mode.
Further, in the above transmission structure, the internal combustion engine 7 may be connected to the first driving motor 1 or the second driving motor 2 through the clutch 8 to meet different requirements.
Further, in the above transmission structure, the second driving motor 2 may be connected to the first ring gear 32 and the second carrier 43, and the brake 6 may be connected to the second sun gear 41, so as to meet a demand for a high-speed output condition.
The speed change device can be carried on mechanical devices with strictly controlled weight and cost, such as various pure electric vehicles, hybrid electric vehicles, motorcycles, ships, engineering machinery and the like.
Example 1
A speed change device comprises a first driving motor 1, a second driving motor 2, a first planet row 3, a second planet row 4, an output shaft 5 and a brake 6; the first planetary row 3 comprises a first sun gear 31, a first ring gear 32 and a first planet carrier 33; the second planetary row 4 comprises a second sun gear 41, a second ring gear 42 and a second planet carrier 43; the first driving motor 1 is connected with the first sun gear 31, the second driving motor 2 is connected with the second sun gear 41, the first gear ring 32 is connected with the second planet carrier 43, the output shaft 5 is connected with the first planet carrier 33, the output shaft 5 is connected with the second gear ring 42, the brake 6 is connected with the first gear ring 32, and the brake 6 is connected with the second planet carrier 43.
The speed change method of the speed change device comprises the following steps:
under the working condition of low speed and light load, the brake 6 is closed, any one of the first driving motor 1 or the second driving motor 2 outputs power to the output shaft 5, and the other motor idles;
under the working condition of low speed and heavy load, the brake 6 is closed, and the first driving motor 1 and the second driving motor 2 output power to the output shaft 5 through torque coupling;
under the high-speed working condition, the brake 6 is separated, and the first driving motor 1 and the second driving motor 2 output power to the output shaft 5 through the rotating speed coupling.
In the process of power transmission, the output shaft of the first driving motor 1 drives the first sun gear 31 to rotate, power is input, the output shaft of the second driving motor 2 drives the second sun gear to rotate, and power is input and is output by the output shaft 5 connected with the first planet carrier 33 and the second gear ring 42 after being coupled by torque or rotating speed, the scheme can realize the rotating speed coupling or the torque coupling of two motors by designing a specific planet row transmission structure between the two driving motors, so that the vehicle can improve the unpowered overall efficiency of a power system under the low-speed light-load working condition, the low-speed heavy-load working condition or the high-speed working condition, can realize the interruption output of four gears by only operating a brake 6 control mechanism and a motor control program, avoids complex gear shifting execution and control mechanisms, thereby realizing the advantages of simpler manufacture, low cost and high reliability, the motor has light weight, low comprehensive cost, less parts and simple maintenance; the gear shifting process is smooth, impact caused by gear shifting power interruption is avoided, and comfort is improved.
Example 2
A speed change device comprises a first driving motor 1, a second driving motor 2, a first planet row 3, a second planet row 4, an output shaft 5 and a brake 6; the first planetary row 3 comprises a first sun gear 31, a first ring gear 32 and a first planet carrier 33; the second planetary row 4 comprises a second sun gear 41, a second ring gear 42 and a second planet carrier 43; the first driving motor 1 is connected with the first sun gear 31, the second driving motor 2 is connected with the second sun gear 41, the first gear ring 32 is connected with the second planet carrier 43, the output shaft 5 is connected with the first planet carrier 33, the output shaft 5 is connected with the second gear ring 42, the brake 6 is connected with the first gear ring 32, and the brake 6 is connected with the second planet carrier 43. An internal combustion engine 7 is also included, which internal combustion engine 7 is connected to the first drive motor 1 via a clutch 8.
In the power transmission process, the internal combustion engine 7 drives the output shaft 5 of the first driving motor 1 to rotate through the clutch 8, power is input, the output shaft 5 of the first driving motor 1 drives the first sun gear 31 to rotate, power is input, the output shaft 5 of the second driving motor 2 drives the second sun gear 41 to rotate, and power is input and is output through the output shaft 5 connected with the first planet carrier 33 and the second gear ring 42 after being coupled through torque or rotating speed.
Deal with different operating modes, still can realize the hybrid output of multiple mode, specifically do:
when the vehicle is in a parking state, the brake 6 is separated, the first driving motor 1 or the second driving motor 2 is used as an ISG motor to start the internal combustion engine 7, or the internal combustion engine 7 drives the first driving motor 1 or the second driving motor 2 to generate electricity, so that the in-situ electricity generation function is realized;
when the vehicle is in a running state and the power battery is seriously insufficient, the brake 6 is closed, and the internal combustion engine 7 simultaneously drives the vehicle, the first driving motor 1 and the second driving motor 2 to generate electricity;
when the vehicle is in a running state and the storage of a power battery is low, the brake 6 is separated, the internal combustion engine 7 simultaneously drives the vehicle and the first driving motor 1 to generate power, the second driving motor 2 outputs power to realize the coupling of the rotating speed of the system, and the vehicle has an inorganic speed change function and runs at a high speed to correspond to an economic cruising working condition;
when the vehicle is in a running state and the electric quantity storage of the power battery is sufficient, the brake 6 is closed, the power of the internal combustion engine 7, the first driving motor 1 and the second driving motor 2 drive the vehicle at the same time, the torque coupling of the system is realized, and the working conditions of heavy load, rapid acceleration or steep slope are met;
the vehicle is in a running state, the electric quantity of the power battery is sufficient, the brake 6 is separated, the power of the internal combustion engine 7, the first driving motor 1 and the second driving motor 2 drive the vehicle at the same time, the coupling of the system rotating speed is realized, and the ultra-high speed working condition is met.
The internal combustion engine 7 drives the two motors to generate power, one motor generates power, the other motor outputs power, the internal combustion engine 7 is coupled with the torques of the two motors, and the internal combustion engine 7 is coupled with the rotating speeds of the two motors, so that the five-mode output of the power system is realized, various working conditions are met, and the overall efficiency of the power system is improved.
The conventional internal combustion engine 7 and the clutch 8 are added for control, so that the hybrid power engine can be applied to a hybrid power mode, five operation modes are realized, and all working condition requirements are met.
Example 3
A speed change device comprises a first driving motor 1, a second driving motor 2, a first planet row 3, a second planet row 4, an output shaft 5 and a brake 6; the first planetary row 3 comprises a first sun gear 31, a first ring gear 32 and a first planet carrier 33; the second planetary row 4 comprises a second sun gear 41, a second ring gear 42 and a second planet carrier 43; the first driving motor 1 is connected with the first sun gear 31, the second driving motor 2 is connected with the first gear ring 32, the first gear ring 32 is connected with the second planet carrier 43, the output shaft 5 is connected with the first planet carrier 33, the output shaft 5 is connected with the second gear ring 42, and the brake 6 is connected with the second sun gear 41.
The speed change method of the speed change device comprises the following steps:
under the working condition of low speed and light load, the brake 6 is closed, any one of the first driving motor 1 or the second driving motor 2 outputs power to the output shaft 5, and the other motor idles;
under the working condition of low speed and heavy load, the brake 6 is closed, and the first driving motor 1 and the second driving motor 2 output power to the output shaft 5 through torque coupling;
under the high-speed working condition, the brake 6 is separated, and the first driving motor 1 and the second driving motor 2 output power to the output shaft 5 through the rotating speed coupling.
In the process of power transmission, the output shaft of the first driving motor 1 drives the first sun gear 31 to rotate, power is input, the output shaft of the second driving motor 2 drives the second planet carrier 43 to rotate, and power is input and is output by the output shaft 5 connected with the first planet carrier 33 and the second gear ring 42 after being coupled by torque or rotating speed, the scheme can realize the rotating speed coupling or the torque coupling of two motors by designing a specific planet row transmission structure between the two driving motors, so that the vehicle can improve the unpowered overall efficiency of a power system under the low-speed light-load working condition, the low-speed heavy-load working condition or the high-speed working condition, can realize the interruption output of four gears by only operating a brake 6 control mechanism and a motor control program, avoids complex gear shifting execution and control mechanisms, thereby realizing the advantages of simpler manufacture, low cost and high reliability, the motor has light weight, low comprehensive cost, less parts and simple maintenance; the gear shifting process is smooth, impact caused by gear shifting power interruption is avoided, and comfort is improved.
Example 4
In addition to embodiment 3, an internal combustion engine 7 and a clutch 8 are added, and the internal combustion engine 7 is connected to the first drive motor 1 or the second drive motor 2 through the clutch 8.
In the power transmission process, the internal combustion engine 7 drives the output shaft of the first driving motor 1 to rotate through the clutch 8, power is input, the output shaft of the first driving motor 1 drives the first sun gear 31 to rotate, power is input, the output shaft of the second driving motor 2 drives the second planet carrier 43 to rotate, and the input power is coupled through torque or rotating speed and then is output through the output shaft 5 connected with the first planet carrier 33 and the second gear ring 42.
Deal with different operating modes, still can realize the hybrid output of multiple mode, specifically do:
when the vehicle is in a parking state, the brake 6 is separated, the first driving motor 1 or the second driving motor 2 is used as an ISG motor to start the internal combustion engine 7, or the internal combustion engine 7 drives the first driving motor 1 or the second driving motor 2 to generate electricity, so that the in-situ electricity generation function of the vehicle is realized;
when the vehicle is in a running state and the power battery is seriously insufficient, the brake 6 is closed, and the internal combustion engine 7 simultaneously drives the vehicle, the first driving motor 1 and the second driving motor 2 to generate electricity;
when the vehicle is in a running state and the storage of a power battery is low, the brake 6 is separated, the internal combustion engine 7 simultaneously drives the vehicle and the first driving motor 1 to generate power, the second driving motor 2 outputs power, the coupling of the system rotating speed is realized, the vehicle has a stepless speed change function and runs at a high speed, and the economical cruising working condition is met;
when the vehicle is in a running state and the electric quantity storage of the power battery is sufficient, the brake 6 is closed, the power of the internal combustion engine 7, the first driving motor 1 and the second driving motor 2 drive the vehicle at the same time, the torque coupling of the system is realized, and the working conditions of heavy load, rapid acceleration or steep slope are met;
the vehicle is in a running state, the electric quantity of the power battery is sufficient, the brake 6 is separated, the power of the internal combustion engine 7, the first driving motor 1 and the second driving motor 2 drive the vehicle at the same time, the coupling of the system rotating speed is realized, and the ultra-high speed working condition is met.
The internal combustion engine 7 drives two motors to generate power or one motor generates power and the other motor outputs power, the internal combustion engine 7 is coupled with the torques of the two motors, and the internal combustion engine 7 is coupled with the rotating speeds of the two motors, so that the five-mode output of the power system is realized, the requirements of various working conditions are met, and the overall efficiency of the power system is improved.
The conventional internal combustion engine 7 and the clutch 8 are added for control, so that the hybrid power engine can be applied to a hybrid power mode, five operation modes are realized, and all working condition requirements are met.
In summary, the technical scheme of the invention can realize the rotational speed coupling or torque coupling of the two motors by designing the specific planetary gear transmission structure between the two driving motors, so that the vehicle can improve the overall efficiency of the power system under the low-speed light-load working condition, the low-speed heavy-load working condition or the high-speed working condition, and can realize the unpowered interrupted output of a plurality of gears by only operating one brake control mechanism and one motor control program, thereby avoiding the complex gear shifting execution and control mechanism, and further realizing the advantages of simpler manufacture, low cost, high reliability and the like, light motor weight, low comprehensive cost, less parts and simple maintenance; the gear shifting process is smooth, impact caused by gear shifting power interruption is avoided, and comfort is improved.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent changes made by using the contents of the present specification and the drawings, or applied directly or indirectly to the related technical fields, are included in the scope of the present invention.
Claims (9)
1. A speed change device is characterized by comprising a first driving motor, a second driving motor, a first planet row, a second planet row, an output shaft and a brake;
the first planet row comprises a first sun gear, a first gear ring and a first planet carrier;
the second planet row comprises a second sun gear, a second gear ring and a second planet carrier;
the first driving motor is connected with the first sun gear, the second driving motor is connected with the second sun gear, the first gear ring is connected with the second planet carrier, the output shaft is connected with the first planet carrier, the output shaft is connected with the second gear ring, the brake is connected with the first gear ring, and the brake is connected with the second planet carrier.
2. A speed change device is characterized by comprising a first driving motor, a second driving motor, a first planet row, a second planet row, an output shaft and a brake;
the first planet row comprises a first sun gear, a first gear ring and a first planet carrier;
the second planet row comprises a second sun gear, a second gear ring and a second planet carrier;
the first driving motor is connected with the first sun gear, the second driving motor is connected with the first gear ring, the first gear ring is connected with the second planet carrier, the output shaft is connected with the first planet carrier, the output shaft is connected with the second gear ring, and the brake is connected with the second sun gear.
3. The transmission of claim 1 or 2, wherein the brake is a wet brake or a dry brake, the brake is a self-energizing brake or a non-self-energizing brake, and the brake is an electric brake, a pneumatic brake, or a hydraulic brake.
4. The transmission according to claim 1 or 2, wherein one of the first drive motor and the second drive motor is a characteristic motor that is efficient at a low rotation speed, and the other is a characteristic motor that is efficient at a high rotation speed.
5. The transmission according to claim 1 or 2, characterized by further comprising an internal combustion engine connected to the first drive motor or the second drive motor through a clutch.
6. The transmission of claim 5, wherein the power system of the internal combustion engine comprises a power system using gasoline, diesel, or LNG fuel.
7. The transmission of claim 1, wherein the output mode of the output shaft is a transverse or longitudinal flatbed output mode.
8. A shifting method of a shifting apparatus according to claim 1 or 2, characterized by comprising:
under the working condition of low speed and light load, the brake is closed, any one of the first drive motor or the second drive motor outputs power to the output shaft, and the other motor idles;
under the working condition of low speed and heavy load, the brake is closed, and the first driving motor and the second driving motor output power to the output shaft through torque coupling;
under the high-speed working condition, the brake is separated, and the first driving motor and the second driving motor output power to the output shaft through rotating speed coupling.
9. A method of shifting a transmission as claimed in claim 5, comprising
When the vehicle is in a parking state, the brake is separated, and the first driving motor or the second driving motor is used as an ISG motor to start the internal combustion engine or is driven by the internal combustion engine to generate electricity in situ;
when the vehicle is in a running state and the electric quantity of the power battery is seriously insufficient, the brake is closed, and the power of the internal combustion engine simultaneously drives the vehicle and drives the first driving motor and the second driving motor to generate electricity;
when the vehicle is in a running state and the storage of the power battery is low, the brake is separated, the power of the internal combustion engine drives the vehicle and the first driving motor to generate power at the same time, and the second driving motor outputs power to realize the coupling of the rotating speed of the system;
when the vehicle is in a running state and the power battery is sufficient in storage capacity, the brake is closed, the power of the internal combustion engine, the first driving motor and the second driving motor drive the vehicle at the same time, and the torque coupling of the system is realized;
the vehicle is in a running state, the power battery is sufficient in electricity storage, the brake is separated, the internal combustion engine power, the first driving motor and the second driving motor drive the vehicle at the same time, and the coupling of the system rotating speed is achieved.
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| CN202010932786.6A CN112013087A (en) | 2020-09-08 | 2020-09-08 | Speed change device and speed change method |
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| CN202010932786.6A CN112013087A (en) | 2020-09-08 | 2020-09-08 | Speed change device and speed change method |
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