CN202399888U

CN202399888U - Power assembly system for ISG (Integrated Starter and Generator) parallel hybrid power automobile

Info

Publication number: CN202399888U
Application number: CN2012200011214U
Authority: CN
Inventors: 付主木; 高爱云; 王斌; 周朋歌; 李勋; 宋晓娜; 李晓强
Original assignee: Henan University of Science and Technology
Current assignee: Henan University of Science and Technology
Priority date: 2012-01-04
Filing date: 2012-01-04
Publication date: 2012-08-29
Anticipated expiration: 2022-01-04

Abstract

The utility model relates to a power assembly system for an ISG (Integrated Starter and Generator) parallel hybrid power automobile. The power assembly system comprises an engine, a main motor and an ISG motor, wherein the ISG motor is used for driving pinions at the two ends of a transmission shaft to be meshed with a gear on an engine output shaft and a gear on a main motor output shaft respectively, so that an efficiency-optimized gear set is constructed; the input and output efficiencies of the engine and the main motor are optimized through the ISG motor; a bull gear on the engine output shaft is arranged on an engine fly wheel; and the engine output shaft is directly connected with a final transmission shaft through a clutch and a central gear set, so that main transmission loss is reduced. The efficiencies and auxiliary driving functions of the engine and the main motor are optimized, and the power assembly system has a simple structure and is convenient to realize and maintain; and the central controller is used for adjusting the input or output power distribution between the engine and the motor driving system as well as between the main motor and the ISG motor by judging a battery charge state SOC (System On Chip) value, so that the fuel economy and driving system efficiency of the entire automobile are finally increased when the hybrid power automobile runs in different working modes.

Description

A kind of ISG parallel type hybrid dynamic powertrain system of automobile

Technical field

The utility model belongs to the hybrid vehicle technical field, relates to a kind of power assembly system of ISG parallel type hybrid dynamic automobile.

Background technology

Hybrid vehicle is the focus of studying both at home and abroad over past ten years.The research of hybrid vehicle belongs to starting or preliminary test stage at home; And major part is single with structure, the simple light hybrid of control is main; Motor is hung on driving engine one side outward and is used for engine starting or is used for regenerative brake, and motor driven systems efficient is low relatively.In addition, the efficient of hybrid vehicle be fundamentally improved, the degree of mixing of automobile should be improved; When the hybrid vehicle degree of mixing is higher, will increase the complexity of hybrid vehicle configurations, the requirement of motor driven systems also can correspondingly be increased; When 2 motors or a plurality of motor occurring; Must be according to the size of automobile demand power, binding engine, motor driven systems, battery charge state (SOC) value are judged the mode of operation of each parts, make the performance of car load reach best.

The utility model content

The purpose of the utility model provides a kind of ISG parallel type hybrid dynamic powertrain system of automobile, to solve the contradiction between hybrid vehicle efficient and the configuration of automobiles complexity.

For realizing above-mentioned purpose, the ISG parallel type hybrid dynamic powertrain system of automobile of the utility model comprises driving engine and main motor; The output shaft of said driving engine is a main driving axle; Big gear wheel on the main driving axle is installed on the engine flywheel, and main driving axle directly connects with final drive shaft through power-transfer clutch, central tooth wheels, and said main motor output shaft is a counter drive shaft; This counter drive shaft is integrated through power-transfer clutch, gear and main rotor output shaft; Directly connect with the central tooth wheels, said main motor is controlled by main motor inverter, and this main motor inverter is exported control linkage by electric machine controller; Said electric machine controller is also through ISG motor inverter control linkage ISG motor; This ISG rotor two ends output shaft is as attachment driving shaft; Two accessory drives shaft ends are separately installed with power-transfer clutch; Two clutch spindles connect with miniature gears respectively, miniature gears respectively with main driving axle on big gear wheel and the gear mesh on the counter drive shaft, form the efficiency optimization gear cluster; Said driving engine, electric machine controller, each power-transfer clutch are connected with central controller controls respectively.

Further, said ISG motor and main motor are permanent-magnet synchronous direct current motor, and main motor just is being diverted to generating or is being driven, and the ISG motor just changes, reverses and all can be used for generating or driving.

Further, said maximum power output equals the maximum output power sum of main motor and ISG motor.

The ISG parallel type hybrid dynamic powertrain system of automobile of the utility model; The ISG motor has replaced the starter of driving engine; Engagement that the miniature gears at ISG motor attachment driving shaft two ends cogs with engine output shaft respectively and main motor output shaft cogs; Form the efficiency optimization gear cluster, optimize driving engine output efficiency and main motor I/O efficiency through the ISG motor; Engine output shaft is a main driving axle, and the big gear wheel on the main driving axle is installed on the engine flywheel, and main driving axle directly connects with final drive shaft through power-transfer clutch, central tooth wheels, to reduce the main gear loss; The utility model is through increasing ISG motor attachment driving shaft; Make the ISG motor have fire an engine; Optimize the function of driving engine and main efficiency of motor and assistive drive; Dynamic assembly is simple in structure, be convenient to realize and safeguard that the power division control policy is concisely accurate, can well improve the car load fuel economy.

Description of drawings

Fig. 1 is the power assembly system constructional drawing of the utility model embodiment;

Fig. 2 is power circuit output or the input distance base diagram of the utility model embodiment;

Fig. 3 is the engine efficiency optimal curve figure of the utility model embodiment;

Fig. 4 is that the car load mode of operation of the utility model embodiment is confirmed diagram of circuit;

Fig. 5 is power division figure under the various patterns of the utility model embodiment.

The specific embodiment

As shown in Figure 1, ISG parallel type hybrid dynamic powertrain system of automobile comprises that driving engine 15 flywheels and engine efficiency optimization gear 1 is cemented on the main output shaft 2, and main output shaft 2 is equipped with power-transfer clutch 3 near central tooth wheels main gear 4 sides; ISG motor 17 output shafts are attachment driving shaft 7, and both-side ends respectively is equipped with

miniature gears

5,9, optimize gear 1 with engine efficiency respectively and optimize gear 12 engagements with main electrical efficiency, and attachment driving shaft 7 is separately installed with power-transfer clutch 6,8 near the miniature gears side; Engine efficiency is optimized gear 1 and is formed engine efficiency optimization gear cluster 49 with miniature gears 5; Main electrical efficiency is optimized gear 12 and is formed electrical efficiency optimization gear cluster 50 with miniature gears 9; Main motor 16 place axles are counter drive shaft 10; Optimize gear 12 sides near main electrical efficiency power-transfer clutch 11 is installed; Main motor is optimized gear 11 through main electrical efficiency and is directly connected with central tooth wheels pinion 13, and central tooth wheels pinion 13 directly connects with final output shaft 14 with central tooth wheels main gear 4 engagement backs.ISG motor 17 and main motor 16 are respectively by

inverter

19,18 controls separately, and inverter 18,19 is by electric machine controller 20 controls.

Like Fig. 1, shown in 2, the mixed power system structure power way of output is parallel or single mode, during driving engine 15 independent drive; The power outgoing route is 21; At this moment, power-transfer clutch 3,6 combines, and power-transfer clutch 8,11 separates; To batteries charging, just transmitting by ISG motor 17 through ISG motor 17 for the driving engine surplus power.

When driving engine 15 and motor driven systems combination drive; Engine operation is on optimal curve; If the difference of automobile demand power and engine output is less than maximum output power under the current rotating speed of ISG motor, this moment, the power outgoing route was 21,22, and power-transfer clutch 3,6 combines; Power-transfer clutch 8,11 separates, and the ISG motor is just changeing driving; If the difference of automobile demand power and engine output is greater than maximum output power under the current rotating speed of ISG motor and less than main motor maximum output power under the current rotating speed; Engine operation is on optimal curve; The power outgoing route is 21,23; Power-transfer clutch 3,11 combines, and power-transfer clutch 6,8 separates, and main motor is just changeing driving; If automobile demand power and engine output difference are greater than under the current rotating speed during main motor maximum output power; Engine operation is on optimal curve; Main motor is exported with maximum power, and the power outgoing route is 21,23,24, and power-transfer clutch 6 separates; Other power-transfer clutch combines, at this moment ISG motor inversion driving.

Pure when electronic, if automobile demand power is less than ISG motor maximum output power under the current rotating speed, the ISG motor works independently, and power-transfer clutch 8 combines, and other power-transfer clutch all separates, and the power outgoing route is 24; If automobile demand power is greater than ISG motor maximum output power under the current rotating speed and less than under the current rotating speed during main motor maximum power, main motor works independently, power-transfer clutch 11 combines, and other disengaging of clutch, power outgoing route are 23; If automobile demand power is greater than main motor maximum output power under the current rotating speed, main motor Maximum Power Output, the ISG motor provides surplus power, and power-transfer clutch 8,11 combines, and power-transfer clutch 3,6 separates, and the power outgoing route is 23,24.Pure when electronic, the ISG machine operation is an inversion driving, and main motor is just changeing driving.

During regenerative brake, clutch operating is with pure electronic consistent, horsepower input path 23,24, and notice that 21,22 power paths can not be reverse, at this moment, the ISG machine operation for counter-rotating generating, main machine operation for just transmitting.

As shown in Figure 3, driving engine output optimization efficiency draws according to concrete rotating speed, torque.According to the automobile present speed, can calculate engine speed, obtain respective torque according to torque, rotational speed optimization curve, draw engine output by torque, rotating speed, power triadic relation again.

As shown in Figure 4, car load when operation, at first detect and show SOC value of battery (step 25), detect automobile demand power more whether more than or equal to zero (step 26):

If not, promptly automobile demand power is less than zero, when SOC value of battery less than 0.75 the time, automobile is operated in regenerative brake pattern (step 27), battery SOC was more than or equal to 0.75 o'clock, automobile is operated in hydraulic braking pattern or other braking mode.

If automobile demand power is more than or equal to zero: SOC value of battery is operated in driving engine independent drive pattern (step 28) for being less than or equal at 0.25 o'clock; SOC value of battery is greater than 0.25 and less than 0.5, should judge that automobile silk ball power is whether greater than engine optimization horsepower output (step 29): otherwise be operated in driving engine independent drive pattern (step 30), and be then to be operated in combination drive pattern (step 31); If SOC value of battery is more than or equal to 0.5 and less than 0.75; Whether judging automobile demand power greater than engine optimization horsepower output (step 32) equally, otherwise be operated in electric-only mode (step 33), is then to be operated in combination drive pattern (step 34).If SOC value of battery is more than or equal to 0.75, automobile is operated in electric-only mode (step 36).

As shown in Figure 5, if automobile is operated in then driving engine output optimization power (step 38) of combination drive pattern (step 37), all the other power and motor driven systems provide.Power division between motor driven systems is consistent when being operated in electric-only mode or regenerative brake pattern (step 39) with automobile: whether detect motor driven systems power less than ISG motor maximum output power (step 40); If motor work independently (step 41) then; Then continue if not whether to detect motor driven systems power less than main motor maximum output power (step 42); If motor work independently (step 43) then; Then main if not motor maximum power output, the ISG motor provides other power (step 44).

If automobile is operated in driving engine independent drive pattern (step 45); Then detect automobile demand power and whether optimize power (step 46) less than driving engine output; Then automobile acquisition power is that power (step 47) is optimized in driving engine output if not; If then automobile is operated in the driving charge mode, power is optimized in driving engine output, and surplus power offers ISG motor charging (step 48).

Claims

1. an ISG parallel type hybrid dynamic powertrain system of automobile comprises driving engine and main motor, it is characterized in that; The output shaft of said driving engine is a main driving axle; Big gear wheel on the main driving axle is installed on the engine flywheel, and main driving axle directly connects with final drive shaft through power-transfer clutch, central tooth wheels, and said main motor output shaft is a counter drive shaft; This counter drive shaft is integrated through power-transfer clutch, gear and main rotor output shaft; Directly connect with the central tooth wheels, said main motor is controlled by main motor inverter, and this main motor inverter is exported control linkage by electric machine controller; Said electric machine controller is also through ISG motor inverter control linkage ISG motor; This ISG rotor two ends output shaft is as attachment driving shaft; Two accessory drives shaft ends are separately installed with power-transfer clutch; Two clutch spindles connect with miniature gears respectively, miniature gears respectively with main driving axle on big gear wheel and the gear mesh on the counter drive shaft, form the efficiency optimization gear cluster; Said driving engine, electric machine controller, each power-transfer clutch are connected with central controller controls respectively.

2. system according to claim 1 is characterized in that: said ISG motor and main motor are permanent-magnet synchronous direct current motor, and main motor just is being diverted to generating or is being driven, and the ISG motor just changes, reverses and all can be used for generating or driving.

3. system according to claim 1 and 2 is characterized in that: said maximum power output equals the maximum output power sum of main motor and ISG motor.