CN111634183A - Double-planet-row hybrid power system and auxiliary braking method thereof - Google Patents
Double-planet-row hybrid power system and auxiliary braking method thereof Download PDFInfo
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- CN111634183A CN111634183A CN202010507060.8A CN202010507060A CN111634183A CN 111634183 A CN111634183 A CN 111634183A CN 202010507060 A CN202010507060 A CN 202010507060A CN 111634183 A CN111634183 A CN 111634183A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
- B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
- B60K6/22—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs
- B60K6/36—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the transmission gearings
- B60K6/365—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the transmission gearings with the gears having orbital motion
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
- B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
- B60K6/22—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs
- B60K6/24—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the combustion engines
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
- B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
- B60K6/50—Architecture of the driveline characterised by arrangement or kind of transmission units
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
- B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
- B60W10/06—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of combustion engines
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
- B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
- B60W10/08—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of electric propulsion units, e.g. motors or generators
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
- B60W10/18—Conjoint control of vehicle sub-units of different type or different function including control of braking systems
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
- B60W10/24—Conjoint control of vehicle sub-units of different type or different function including control of energy storage means
- B60W10/26—Conjoint control of vehicle sub-units of different type or different function including control of energy storage means for electrical energy, e.g. batteries or capacitors
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W30/00—Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of vehicle sub-units
- B60W30/18—Propelling the vehicle
- B60W30/18009—Propelling the vehicle related to particular drive situations
- B60W30/18109—Braking
- B60W30/18136—Engine braking
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2510/00—Input parameters relating to a particular sub-units
- B60W2510/24—Energy storage means
- B60W2510/242—Energy storage means for electrical energy
- B60W2510/244—Charge state
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/62—Hybrid vehicles
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Automation & Control Theory (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Hybrid Electric Vehicles (AREA)
Abstract
The invention discloses a double-planet-row hybrid power system and an auxiliary braking method thereof, wherein the double-planet-row hybrid power system comprises an engine, a driving motor, a first planet row and a second planet row, wherein: the engine is connected with a first transmission assembly for power transmission, and the first transmission assembly is connected with the first planet row; the driving motor is connected with a second transmission assembly for power transmission, and the second transmission assembly is connected with the second planet row; the first transmission assembly is provided with a first locker for power locking; the first planet row and the second planet row are both connected with an output assembly for driving the whole vehicle; the first planet row is connected with a third transmission assembly, and the third transmission assembly is connected with a generator; a second locking device for locking the generator is arranged on the third transmission assembly; the invention improves the braking energy efficiency of the whole vehicle, reduces the use of the friction plates of the main brake of the vehicle, improves the auxiliary braking effect by utilizing other vehicle accessories such as an engine, a driving motor and the like, and reduces the oil consumption cost of the vehicle.
Description
Technical Field
The invention relates to the technical field of hybrid vehicle braking, in particular to a double-planet-row hybrid power system and an auxiliary braking method thereof.
Background
Planetary rows refer to gear systems whose axes of rotation rotate with the carrier about the axes of other gears, in addition to rotating about their axes of rotation as fixed-axis gears, and planetary rows are the basis of a speed change mechanism, which is typically an automatic transmission, consisting of two or more rows of planet rows.
In the braking process of the vehicle, under the action of vehicle inertia, the whole vehicle can generate mechanical energy in the motion process, the mechanical energy is transmitted to the planet row, the outer gear ring on the planet row rotates, the motor coupled with the outer gear ring rotates along with the outer gear ring to generate electromotive force to form charging current, the power battery recovers part of electric energy and stores the electric energy in the power battery.
Disclosure of Invention
The invention aims to provide a double-planet-row hybrid power system and an auxiliary braking method thereof, which improve the energy recovery of a generator and the braking energy efficiency of a whole vehicle, reduce the use of friction plates of a main brake of the vehicle, improve the auxiliary braking effect by using other vehicle accessories such as an engine and a driving motor and reduce the oil consumption of the vehicle and the cost of the whole vehicle.
In order to achieve the purpose, the invention adopts the following technical scheme:
a double-planet-row hybrid power system comprises an engine, a driving motor, a first planet row and a second planet row, wherein:
the engine is connected with a first transmission assembly for power transmission, and the first transmission assembly is connected with the first planet row; the driving motor is connected with a second transmission assembly for power transmission, and the second transmission assembly is connected with the second planet row; the first transmission assembly is provided with a first locker for power locking; the first planet row and the second planet row are both connected with an output assembly for driving the whole vehicle; the first planet row is connected with a third transmission assembly, and the third transmission assembly is connected with a generator; and a second locking device for locking the generator is arranged on the third transmission assembly.
Further, the first planet row comprises a first gear ring, a first planet carrier and a first sun gear, and the first gear ring, the first planet carrier and the first sun gear are meshed with each other; the second planet row comprises a second gear ring, a second planet carrier and a second sun gear, and the second gear ring, the second planet carrier and the second sun gear are meshed with each other; the first planet carrier is connected with the first transmission assembly and receives power transmission of an engine, and the first sun gear is connected with the generator through the third transmission assembly; and the second sun gear is connected with the driving motor through a second transmission assembly.
Furthermore, the engine is provided with a piston, a crankshaft and a cylinder, the piston is arranged in the cylinder, the piston is connected with the crankshaft to transmit power, and the crankshaft is connected with the first transmission assembly; the cylinder is provided with an exhaust valve for exhaust.
Furthermore, the engine, the generator and the driving motor are all connected with a vehicle control unit for human-computer interaction.
Furthermore, the generator and the driving motor are both connected with a power battery, and a BMS battery management system for detecting electric quantity and charging capacity is arranged on the power battery.
An auxiliary braking method for a double-planet-row hybrid power system comprises the following steps:
s1, detecting the current vehicle speed and the electric quantity of the power battery, and feeding back the current vehicle speed and the electric quantity to the vehicle control unit, wherein the vehicle control unit obtains the vehicle speed working condition and the electric quantity grade of the current vehicle speed according to preset classification;
s2, adjusting the matching mode of the first planet row, the second planet row, the first locker, the second locker, the engine, the generator and the driving motor by the vehicle controller according to the vehicle speed working condition of the current vehicle speed;
s3, performing auxiliary braking according to the current electric quantity grade of the power battery, adjusting the matching mode of the first planet row, the second planet row, the first locking device, the second locking device, the engine, the generator and the driving motor by the vehicle controller, dividing the electric quantity grade into first-grade electric quantity, second-grade electric quantity and third-grade electric quantity, dividing the auxiliary braking into first-grade auxiliary braking, second-grade auxiliary braking and third-grade auxiliary braking, performing the first-grade auxiliary braking on the first-grade electric quantity by the auxiliary braking, performing the second-grade auxiliary braking on the second-grade electric quantity by the auxiliary braking, and performing the third-grade auxiliary braking on the third.
Further, the matching mode of step S2 is divided into 3 modes, namely, a low speed operating mode, a medium speed operating mode and an ultra high speed operating mode, and specifically, the following modes are adopted:
and (3) low-speed working condition: the first transmission assembly is locked through the first locking device, the engine is locked, the second locking device is unlocked, the generator is connected with the first planet row, the power battery provides power, the driving motor drives the second planet row to rotate, and the whole vehicle is driven through the output assembly;
medium-high speed working conditions: the first locking device and the second locking device are unlocked, the engine drives the first planetary row to rotate, the rotating speed of the engine is regulated by utilizing the rotating speed of the generator, the driving motor drives the second planetary row to rotate, and the whole vehicle is driven by the output assembly;
ultra-high speed working condition: the first locking device is unlocked, the third transmission assembly is locked through the second locking device, the generator is locked, the engine drives the first planet row to rotate, the driving motor drives the second planet row to rotate, and the whole vehicle is driven through the output assembly.
Further, the power level of step S3 is as follows:
a first grade: the electric quantity of the power battery is 0-79%;
a first grade: the electric quantity of the power battery is 80-89%;
third level: the electric quantity of the power battery is 90-100%.
Further, the auxiliary braking in step S3 is specifically as follows:
primary auxiliary braking: the mechanical energy of the whole vehicle is transmitted to the second planet row through the output assembly, the second planet row is transmitted to the driving motor through the second transmission assembly, and the driving motor generates electricity and transmits the electricity to the power battery; the first transmission assembly is locked through the first locking device, the engine is locked, the mechanical energy of the whole vehicle is respectively transmitted to the first planet row and the second planet row through the output assembly, the second locking device is unlocked, the generator receives the mechanical energy through the third transmission assembly to convert the mechanical energy into electric energy to be transmitted to the power battery, and the combined energy of the driving motor and the generator is fed back to the power battery to increase the braking force;
secondary auxiliary braking: the driving motor idles, the first locking device is unlocked, the mechanical energy of the whole vehicle is transmitted to the first planet row through the output assembly, the second locking device is unlocked, the generator receives the mechanical energy through the third transmission assembly and converts the mechanical energy into electric energy to be transmitted to the power battery, the rotating speed of the generator is controlled through the vehicle control unit, the rotating speed of the engine is adjusted, and the high-pressure gas in the cylinder prevents the piston and the crankshaft from moving to perform in-cylinder braking;
three-stage auxiliary braking: the second locking device locks the third transmission assembly, the generator locks, mechanical energy of the whole vehicle is transmitted to the first planet row through the output assembly, the engine receives the mechanical energy of the whole vehicle as braking force through the first transmission assembly, and the engine stops the piston and the crankshaft from moving through high-pressure gas in the cylinder to perform in-cylinder braking; the second locking device is unlocked, the generator is unlocked, the vehicle controller is used for controlling the rotating speed of the generator and the rotating speed of the first gear ring is in the same direction, the generator is in a driving state and consumes the electric quantity of the power battery, the rotating speed of the engine is increased, the engine receives the mechanical energy of the vehicle and the mechanical energy of the generator and performs long-time in-cylinder braking, and the driving motor generates electricity and transmits the electricity to the power battery.
Furthermore, the power battery can not absorb energy feedback generated by primary auxiliary braking or secondary auxiliary braking, and the tertiary auxiliary braking is switched.
After adopting the technical scheme, compared with the background technology, the invention has the following advantages:
1. the mechanical energy of the whole vehicle is transmitted to a first planet row and a second planet row through an output assembly respectively, the first planet row transmits the received mechanical energy of the whole vehicle to an engine through a first transmission assembly and to a generator through a third transmission assembly, a first locker locks the first transmission assembly and locks the engine, the mechanical energy of the first planet row is all received by the generator, a second locker locks the third transmission assembly and locks the generator, the mechanical energy of the first planet row is all received by the engine, the whole vehicle controller controls the energy feedback of a driving motor, the second planet row transmits the received mechanical energy of the whole vehicle to the driving motor through a second transmission assembly, and the received mechanical energy of the whole vehicle is fed back to a power battery through the matching mode of the engine, the driving motor, the first planet row and the second planet row by using the energy of the driving motor and the generator, the energy recovery efficiency of the generator and the braking energy efficiency of the whole vehicle are improved, the use of friction plates of a main brake of the vehicle is reduced, the auxiliary braking effect by utilizing other vehicle accessories such as an engine and a driving motor is improved, and the oil consumption of the vehicle and the cost of the whole vehicle are reduced.
2. The method comprises the steps of classifying vehicle speed working conditions and electric quantity by detecting the current vehicle speed and the electric quantity of a power battery, wherein the vehicle speed working conditions are divided into a low-speed working condition, a medium-high speed working condition and an ultrahigh-speed working condition, and the matching modes of a first planet row, a second planet row, a first locker, a second locker, an engine, a generator and a driving motor are adjusted according to the vehicle speed working conditions; the electric quantity grade is divided into a first grade, a second grade and a third grade, auxiliary braking is carried out according to the electric quantity grade of the power battery, the auxiliary braking is divided into primary auxiliary braking, secondary auxiliary braking and tertiary auxiliary braking, the auxiliary braking carries out the primary auxiliary braking at the primary electric quantity, the secondary auxiliary braking at the secondary electric quantity and the tertiary auxiliary braking at the tertiary electric quantity; the work of the friction plate of the vehicle main brake is reduced, the service life of the friction plate is prolonged, the auxiliary braking part of the vehicle is removed, and the cost of the whole vehicle is reduced.
3. After the oil supply is stopped during the in-cylinder braking, the exhaust valve is opened instantly when the piston is at the upper extreme point in the compression stroke stage, high-pressure gas is released, the exhaust valve is closed, little gas exists in the cylinder, the cylinder is in a negative pressure state when the piston turns downwards from the upper extreme point in the stage, the gas can prevent the piston from descending, and a torque action in the opposite direction of a crankshaft is generated, so that the braking action is generated; the in-cylinder braking of the engine is combined with the energy recovery of the driving motor, so that the auxiliary braking force is improved, and the braking requirement of the vehicle on a long-distance downward long slope is met.
Drawings
FIG. 1 is a hybrid powertrain frame diagram of the present invention;
FIG. 2 is a flow chart illustrating a control method according to the present invention;
FIG. 3 is a schematic view of a first level auxiliary braking low brake of the present invention;
FIG. 4 is a schematic view of a primary auxiliary brake high braking of the present invention;
FIG. 5 is a schematic illustration of the secondary auxiliary braking of the present invention;
FIG. 6 is a schematic diagram of the three-level auxiliary braking short-time braking of the present invention;
FIG. 7 is a schematic diagram of the three-level auxiliary brake long-time brake of the present invention.
Description of reference numerals:
the planetary gear train comprises an engine 1, a driving motor 2, a first planetary row 3, a second planetary row 4, a first transmission assembly 5, a second transmission assembly 6, an output assembly 7, a third transmission assembly 8, a generator 9 and a power battery 10;
a first ring gear.31, a first planet carrier.32, a first sun gear.33;
a second ring gear 41, a second carrier 42, a second sun gear 43;
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Examples
In conjunction with fig. 1 to 7, the present invention discloses a dual planetary row hybrid power system, which includes an engine 1, a driving motor 2, a first planetary row 3 and a second planetary row 4, wherein:
referring to fig. 1, a first transmission assembly 5 for power transmission is connected to the engine 1, and the first transmission assembly 5 is connected to the first planetary gear set 3; the driving motor 2 is connected with a second transmission assembly 6 for power transmission, and the second transmission assembly 6 is connected with the second planet row 4; the first transmission component 5 is provided with a first locking device 51 for locking power; the first planet row 3 and the second planet row 4 are both connected with an output assembly 7 for driving the whole vehicle; the first planet row 3 is connected with a third transmission assembly 8, and the third transmission assembly 8 is connected with a generator 9; and a second locking device 81 for locking the generator is arranged on the third transmission assembly 8.
The first planetary row 3 includes a first ring gear 31, a first carrier 32, and a first sun gear 33, and the first ring gear 31, the first carrier 32, and the first sun gear 33 are engaged with each other; the second planet 4 row comprises a second ring gear 41, a second planet carrier 42 and a second sun gear 43, and the second ring gear 41, the second planet carrier 42 and the second sun gear 43 are meshed with each other; the first planet carrier 32 is connected with the first transmission assembly 5 and receives the power transmission of the engine 1, and the first sun gear 33 is connected with the generator 9 through the third transmission assembly 8; the second sun gear 34 is connected to the drive motor 2 via the second transmission assembly 6.
The engine 1 is provided with a piston, a crankshaft and a cylinder, wherein the piston is arranged in the cylinder, the piston is connected with the crankshaft to transmit power, and the crankshaft is connected with the first transmission assembly 5; the cylinder is provided with an exhaust valve for exhaust.
The engine 1, the generator 9 and the driving motor 2 are all connected with a vehicle control unit for human-computer interaction, and the vehicle control unit respectively controls the first locking device 51 and the second locking device 81; the vehicle control unit is connected with a brake pedal, and a driver treads the brake pedal to change the stroke of the brake pedal to brake; the generator 9 and the driving motor 2 are both connected with a power battery 10, and a BMS battery management system for detecting electric quantity and charging capacity is arranged on the power battery 10.
The first transmission assembly 5, the second transmission assembly 9, the third transmission assembly 8 and the output assembly 7 are preferably transmission shafts or transmission gears, and the embodiment is not limited herein.
Referring to fig. 2, an auxiliary braking method for a double-planetary-row hybrid power system includes the following steps:
and S1, detecting the current vehicle speed and the electric quantity of the power battery 10, and feeding back the current vehicle speed and the electric quantity to the vehicle control unit, wherein the vehicle control unit obtains the vehicle speed working condition and the electric quantity grade of the current vehicle speed according to preset classification.
And S2, adjusting the matching modes of the first planetary gear row 3, the second planetary gear row 4, the first locker 51, the second locker 81, the engine 1, the generator 9 and the driving motor 2 by the vehicle controller according to the vehicle speed working condition of the current vehicle speed.
S3, performing auxiliary braking according to the current electric quantity grade and the brake pedal stroke of the power battery 10, adjusting the matching mode of the first planet row 3, the second planet row 4, the first locker 51, the second locker 81, the engine 1, the generator 9 and the driving motor 2 by the vehicle controller, wherein the electric quantity grade is divided into first-grade electric quantity, second-grade electric quantity and third-grade electric quantity, the auxiliary braking is divided into first-grade auxiliary braking, second-grade auxiliary braking and third-grade auxiliary braking, the auxiliary braking performs first-grade auxiliary braking on the first-grade electric quantity, the second-grade auxiliary braking on the second-grade electric quantity, and the third-grade auxiliary braking on the third-grade electric quantity.
A driver treads a brake pedal to control the whole vehicle controller to control the brake accessories to work, auxiliary braking is matched, the stroke of the brake pedal is increased, the braking force of the auxiliary braking is increased, the braking effect is improved, and the pressure of a friction plate of the main brake is reduced.
The matching mode of step S2 is divided into 3 modes, namely, a low-speed working condition, a medium-high speed working condition and an ultra-high speed working condition, and specifically, the following modes are adopted:
and (3) low-speed working condition: the first transmission assembly 5 is locked through the first locking device 51, the engine 1 is locked, the second locking device 81 is not locked, the generator 9 is connected with the first planetary row 3, the power battery 10 provides power, the driving motor 2 drives the second planetary row 4 to rotate, and the whole vehicle is driven through the output assembly 7.
Medium-high speed working conditions: the first locking device 51 and the second locking device 81 are unlocked, the engine 1 drives the first planet row 3 to rotate, the rotating speed of the engine 1 is regulated by the rotating speed of the generator 9, the driving motor 2 drives the second planet row 4 to rotate, and the whole vehicle is driven by the output assembly 7.
Ultra-high speed working condition: the first locking device 51 is unlocked, the third transmission assembly 8 is locked through the second locking device 81, the generator 9 is locked, the engine 1 drives the first planet row 3 to rotate, the driving motor 2 drives the second planet row 4 to rotate, and the whole vehicle is driven through the output assembly 7.
The speed amounts of the low speed, the medium speed, and the ultra high speed are determined by the specific vehicle type, and the embodiment is not limited herein.
The power level of step S3 is as follows:
a first grade: the electric quantity of the power battery 10 is 0-79%; a first grade: the electric quantity of the power battery 10 is 80-89%; third level: the electric quantity of the power battery 10 is 90-100%; the specific proportion values in the above three interval ranges are determined according to development and calibration of specific matching vehicle types, and the specific proportion values in this embodiment are not limited.
The auxiliary braking in step S3 is specifically as follows:
as shown in fig. 2, 3 and 4, the primary auxiliary brake: according to the requirements of a driver, the brake pedal is controlled to be stepped to perform auxiliary braking with small braking force, the mechanical energy of the whole vehicle is transmitted to the second planet row 4 through the output assembly 7, the second planet row 4 is transmitted to the driving motor 2 through the second transmission assembly 6, and the driving motor 2 generates electricity and transmits the electricity to the power battery 10; according to the requirements of a driver, the brake pedal is controlled to be stepped to increase the braking force of auxiliary braking, the first locking device 51 is used for locking the first transmission assembly 5, the engine 1 is locked, the mechanical energy of the whole vehicle is respectively transmitted to the first planetary row 3 and the second planetary row 4 through the output assembly 7, the second locking device 81 is not locked, the generator 9 receives the mechanical energy through the third transmission assembly 8 and converts the mechanical energy into electric energy to be transmitted to the power battery 10, and the combined energy of the driving motor 2 and the generator 9 is fed back to the power battery 10 to increase the braking force.
As shown in fig. 2 and 5, the secondary auxiliary braking: according to the requirements of a driver, a brake pedal is controlled to be stepped on for auxiliary braking, the driving motor 2 idles or the driving motor 2 is separated from the second planet row 4, the first locker 51 is unlocked, the engine 1 is unlocked, the mechanical energy of the whole vehicle is transmitted to the first planet row 3 through the output assembly 7, the second locker 81 is unlocked, the generator 9 receives the mechanical energy through the third transmission assembly 8 and converts the mechanical energy into electric energy to be transmitted to the power battery 10, the rotating speed of the generator 9 is controlled through the vehicle control unit, the rotating speed of the engine 1 is adjusted, and the high-pressure gas in the cylinder prevents the piston and the crankshaft from moving to perform in-cylinder braking.
As shown in fig. 2, 6 and 7, the three-stage auxiliary braking is: according to the requirements of a driver, the brake pedal is controlled to be stepped on to perform auxiliary braking with short time and small braking force, the second locking device 81 locks the third transmission assembly 8, the generator 9 is locked, the mechanical energy of the whole vehicle is transmitted to the first planet row 3 through the output assembly 7, the engine 1 receives the mechanical energy of the whole vehicle as braking force through the first transmission assembly 5, and the engine 1 prevents the piston and the crankshaft from moving through high-pressure gas in a cylinder to perform in-cylinder braking; according to the requirements of a driver, the brake pedal is controlled to be stepped on to perform auxiliary braking with long time and large braking force, the second locking device 81 is unlocked, the generator 9 is unlocked, the rotating speed of the generator 9 is controlled by the vehicle control unit and is in the same direction as the rotating speed of the first gear ring 31, the generator 9 is in a driving state and consumes the electric quantity of the power battery 10 to generate mechanical energy acting on the engine 1, the rotating speed of the generator 9 is increased to further increase the rotating speed of the engine 1, the rotating speed of the engine 1 is increased to generate larger in-cylinder braking energy, the engine 1 receives the mechanical energy of the vehicle and the mechanical energy of the generator 9 to perform long-time in-cylinder braking, the driving motor 2 generates electricity and transmits the electricity to the power battery 10, the part of the power battery 10 consumed by the generator 9 is filled by.
In-cylinder braking is that after an oil valve is loosened, an exhaust valve is opened instantly when a piston is at an upper extreme point in a compression stroke stage, high-pressure gas is released, the exhaust valve is closed, little gas exists in a cylinder, the cylinder is in a negative pressure state when the piston turns to move downwards from the upper extreme point in an explosion (expansion) stage, the gas can prevent the piston from moving downwards to generate a torque effect in the opposite direction of a crankshaft, and therefore a braking effect is generated; the in-cylinder braking of the engine 1 is combined with the energy recovery of the driving motor 2, so that the auxiliary braking force is improved, and the braking requirement of the vehicle on a long distance downhill is met.
The power battery 10 is in the second grade or the third grade, and the three-grade auxiliary brake can be used when long-time auxiliary braking is needed; the power battery 10 cannot absorb energy feedback generated by the primary auxiliary brake or the secondary auxiliary brake, the tertiary auxiliary brake is switched, the electric quantity and the energy recovery capability of the power battery 10 are detected through the BMS battery management system, if the energy recovery capability of the power battery 10 is 50kw, the primary auxiliary brake or the secondary auxiliary brake generates 51kw, the power battery 10 cannot absorb energy feedback, the power battery 10 skips the primary auxiliary brake and the secondary auxiliary brake to enter the tertiary auxiliary brake, and the switching of the auxiliary brake of the power battery 10 is calibrated according to a preset threshold value, a specific threshold value is calibrated according to a specific vehicle type, and the switching is not limited herein.
In the embodiment, the mechanical energy of the whole vehicle is transmitted to the first planetary row 3 and the second planetary row 4 through the output assembly 7, the first planetary row 3 transmits the received mechanical energy of the whole vehicle to the engine 1 through the first transmission assembly 5, and transmits the received mechanical energy of the whole vehicle to the generator 9 through the third transmission assembly 8, the first transmission assembly 5 is locked by the first locker 51 and the engine 1 is locked, the mechanical energy of the first planetary row 3 is all received by the generator 9, the third transmission assembly 8 is locked by the second locker 81 and the generator 9 is locked, the mechanical energy of the first planetary row 3 is all received by the engine 1, the whole vehicle controller controls the driving motor 2 to feed back the energy, the second planetary row 4 transmits the received mechanical energy of the whole vehicle to the driving motor 2 through the second transmission assembly 6, and the mechanical energy of the whole vehicle is transmitted to the driving motor 2 through the engine 1, the driving motor 2, the first planetary row 3 and the second planetary row 4, utilize driving motor 2 and generator 9 energy feedback power battery 10, improved generator 9 energy recuperation and whole car braking energy efficiency, reduced the use of vehicle service brake friction disc, improved and utilized other vehicle accessories such as engine 1, driving motor 2 to carry out auxiliary brake effect, reduced the work of vehicle service brake friction disc, improve the friction disc life-span, get rid of vehicle auxiliary brake part, if: the eddy current retarder and the hydraulic retarder utilize the energy of the generator to recover the braking energy of the whole vehicle, reduce the oil consumption of the vehicle, save energy, reduce emission and reduce the oil consumption of the vehicle and the cost of the whole vehicle.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. The utility model provides a double row planet row hybrid power system which characterized in that, includes engine, driving motor, first planet row and second planet row, wherein:
the engine is connected with a first transmission assembly for power transmission, and the first transmission assembly is connected with the first planet row; the driving motor is connected with a second transmission assembly for power transmission, and the second transmission assembly is connected with the second planet row; the first transmission assembly is provided with a first locker for power locking; the first planet row and the second planet row are both connected with an output assembly for driving the whole vehicle; the first planet row is connected with a third transmission assembly, and the third transmission assembly is connected with a generator; and a second locking device for locking the generator is arranged on the third transmission assembly.
2. A double planetary row hybrid system and an auxiliary braking method thereof as claimed in claim 1, wherein: the first planet row comprises a first gear ring, a first planet carrier and a first sun gear, and the first gear ring, the first planet carrier and the first sun gear are mutually meshed; the second planet row comprises a second gear ring, a second planet carrier and a second sun gear, and the second gear ring, the second planet carrier and the second sun gear are meshed with each other; the first planet carrier is connected with the first transmission assembly and receives power transmission of an engine, and the first sun gear is connected with the generator through the third transmission assembly; and the second sun gear is connected with the driving motor through a second transmission assembly.
3. A double planetary row hybrid system and an auxiliary braking method thereof as claimed in claim 1, wherein: the engine is provided with a piston, a crankshaft and a cylinder, wherein the piston is arranged in the cylinder, the piston is connected with the crankshaft to transmit power, and the crankshaft is connected with a first transmission assembly; the cylinder is provided with an exhaust valve for exhaust.
4. A double planetary row hybrid system and an auxiliary braking method thereof as claimed in claim 1, wherein: the engine, the generator and the driving motor are all connected with a vehicle control unit for human-computer interaction.
5. A double planetary row hybrid system and an auxiliary braking method thereof as claimed in claim 1, wherein: the generator and the driving motor are both connected with a power battery, and a BMS battery management system for detecting electric quantity and charging capacity is arranged on the power battery.
6. An auxiliary braking method for a double-planet-row hybrid power system is characterized by comprising the following steps of:
s1, detecting the current vehicle speed and the electric quantity of the power battery, and feeding back the current vehicle speed and the electric quantity to the vehicle control unit, wherein the vehicle control unit obtains the vehicle speed working condition and the electric quantity grade of the current vehicle speed according to preset classification;
s2, adjusting the matching mode of the first planet row, the second planet row, the first locker, the second locker, the engine, the generator and the driving motor by the vehicle controller according to the vehicle speed working condition of the current vehicle speed;
s3, performing auxiliary braking according to the current electric quantity grade of the power battery, adjusting the matching mode of the first planet row, the second planet row, the first locking device, the second locking device, the engine, the generator and the driving motor by the vehicle controller, dividing the electric quantity grade into first-grade electric quantity, second-grade electric quantity and third-grade electric quantity, dividing the auxiliary braking into first-grade auxiliary braking, second-grade auxiliary braking and third-grade auxiliary braking, performing the first-grade auxiliary braking on the first-grade electric quantity by the auxiliary braking, performing the second-grade auxiliary braking on the second-grade electric quantity by the auxiliary braking, and performing the third-grade auxiliary braking on the third.
7. The auxiliary braking method for the double-planet-row hybrid power system as claimed in claim 1, wherein the auxiliary braking method comprises the following steps: the matching mode of step S2 is divided into 3 modes, namely, a low-speed working condition, a medium-high speed working condition and an ultra-high speed working condition, and specifically includes the following steps:
and (3) low-speed working condition: the first transmission assembly is locked through the first locking device, the engine is locked, the second locking device is unlocked, the generator is connected with the first planet row, the power battery provides power, the driving motor drives the second planet row to rotate, and the whole vehicle is driven through the output assembly;
medium-high speed working conditions: the first locking device and the second locking device are unlocked, the engine drives the first planetary row to rotate, the rotating speed of the engine is regulated by utilizing the rotating speed of the generator, the driving motor drives the second planetary row to rotate, and the whole vehicle is driven by the output assembly;
ultra-high speed working condition: the first locking device is unlocked, the third transmission assembly is locked through the second locking device, the generator is locked, the engine drives the first planet row to rotate, the driving motor drives the second planet row to rotate, and the whole vehicle is driven through the output assembly.
8. The auxiliary braking method for the double-planet-row hybrid power system as claimed in claim 1, wherein the auxiliary braking method comprises the following steps: the power level of step S3 is as follows:
a first grade: the electric quantity of the power battery is 0-79%;
a first grade: the electric quantity of the power battery is 80-89%;
third level: the electric quantity of the power battery is 90-100%.
9. The auxiliary braking method for the double-planet-row hybrid power system as claimed in claim 1, wherein the auxiliary braking method comprises the following steps: the auxiliary braking in step S3 is specifically as follows:
primary auxiliary braking: the mechanical energy of the whole vehicle is transmitted to the second planet row through the output assembly, the second planet row is transmitted to the driving motor through the second transmission assembly, and the driving motor generates electricity and transmits the electricity to the power battery; the first transmission assembly is locked through the first locking device, the engine is locked, the mechanical energy of the whole vehicle is respectively transmitted to the first planet row and the second planet row through the output assembly, the second locking device is unlocked, the generator receives the mechanical energy through the third transmission assembly to convert the mechanical energy into electric energy to be transmitted to the power battery, and the combined energy of the driving motor and the generator is fed back to the power battery to increase the braking force;
secondary auxiliary braking: the driving motor idles, the first locking device is unlocked, the mechanical energy of the whole vehicle is transmitted to the first planet row through the output assembly, the second locking device is unlocked, the generator receives the mechanical energy through the third transmission assembly and converts the mechanical energy into electric energy to be transmitted to the power battery, the rotating speed of the generator is controlled through the vehicle control unit, the rotating speed of the engine is adjusted, and the high-pressure gas in the cylinder prevents the piston and the crankshaft from moving to perform in-cylinder braking;
three-stage auxiliary braking: the second locking device locks the third transmission assembly, the generator locks, mechanical energy of the whole vehicle is transmitted to the first planet row through the output assembly, the engine receives the mechanical energy of the whole vehicle as braking force through the first transmission assembly, and the engine stops the piston and the crankshaft from moving through high-pressure gas in the cylinder to perform in-cylinder braking; the second locking device is unlocked, the generator is unlocked, the vehicle controller is used for controlling the rotating speed of the generator and the rotating speed of the first gear ring is in the same direction, the generator is in a driving state and consumes the electric quantity of the power battery, the rotating speed of the engine is increased, the engine receives the mechanical energy of the vehicle and the mechanical energy of the generator and performs long-time in-cylinder braking, and the driving motor generates electricity and transmits the electricity to the power battery.
10. The auxiliary braking method for a double-row planetary hybrid system as set forth in claim 9, wherein: the power battery can not absorb energy feedback generated by the primary auxiliary brake or the secondary auxiliary brake, and the three-level auxiliary brake is switched.
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Application publication date: 20200908 |