CN106585613A

CN106585613A - Hybrid electric vehicle gear shifting method

Info

Publication number: CN106585613A
Application number: CN201611075722.9A
Authority: CN
Inventors: 张辉
Original assignee: Tianjin Santroll Electric Automobile Technology Co Ltd
Current assignee: Tianjin Santroll Electric Automobile Technology Co Ltd
Priority date: 2016-11-30
Filing date: 2016-11-30
Publication date: 2017-04-26

Abstract

The invention discloses a hybrid electric vehicle gear shifting method. The stepping depth and the speed of an accelerator pedal are acquired in real time, the current drive requirement is judged according to the stepping depth and the speed, the gear of a gearbox is selected, a vehicle is driven by a motor in the gear shifting process of the gearbox, power output of the vehicle is guaranteed, the acceleration requirement of a driver is met, and the driving feeling of the vehicle is improved.

Description

A kind of hybrid vehicle process for gear

Technical field

The present invention relates to hybrid vehicle, and in particular to the choosing method of hybrid-power automobile shift.

Background technology

Hybrid vehicle is divided into serial mixed power, parallel type hybrid dynamic, series parallel hybrid power, dynamic in mixing In the evolution of power automobile, serial type hybrid automobile is gradually by parallel hybrid electric vehicle and series parallel hybrid power Automobile is replaced, and parallel hybrid electric vehicle and Series-Parallel HEV are driven jointly with motor by electromotor Vehicle is travelled, and electromotor can be operated alone vehicle with motor, and in order to better meet various power demands, more Carry out more hybrid vehicles and be equipped with change speed gear box, existing gearbox shifting principle is typically based on the information such as engine speed and sentences Fixed, to meet engine high-efficiency operating, but such gearshift mode does not adapt to driver demand, particularly demand and accelerates to overtake other vehicles When, if according to selection of speed high gear, engine drive power can be caused to reduce, it is unfavorable for the fast lifting of speed, ultimately result in The dynamic property of vehicle is not strong.

The content of the invention

For solving the above problems, the present invention proposes a kind of hybrid vehicle process for gear, Real-time Collection gas pedal Trample depth and speed, trample depth and velocity estimated currently drives demand and chooses the change speed gear box gear according to described, And by motor-driven vehicle during gearbox shifting, it is ensured that the power output of vehicle, meet the acceleration of driver Demand, improves the driving sense of vehicle.

For achieving the above object, the technical scheme is that：

A kind of hybrid vehicle process for gear, the hybrid vehicle includes electromotor, change speed gear box, motor, institute State electromotor, change speed gear box, motor to be sequentially connected, the electromotor drives the hybrid power vapour jointly with the motor Car, Real-time Collection gas pedal tramples depth and speed, and depth is trampled and velocity estimated currently drives demand simultaneously according to described Choose the change speed gear box gear.

Preset one or more gas pedal depth values and velocity amplitude, contrast Real-time Collection gas pedal trample depth and Speed and preset value, the gas pedal tramples depth value and velocity amplitude is bigger, and the change speed gear box is chosen and gets over low gear, and vehicle drives Dynamic torque is bigger.

During the gearbox shifting, the engine power interrupts, the hybrid power by described in the motor-driven Automobilism.

The hybrid vehicle also includes electrical source of power, described dynamic for providing the motor-driven required drive Power power supply is power-type electrical source of power, and further, the electrical source of power is super capacitor.

Existing hybrid vehicle process for gear is compared, the present invention has remarkable advantage and beneficial effect, is embodied as：

1. using the process for gear of the present invention, gearshift gear is chosen according to gas pedal, can better meet driver's Operation sense；

2. using the process for gear of the present invention, the motor used in shift process temporarily replaces engine driving, keeps Power does not interrupt.

Description of the drawings

Fig. 1 is the corresponding relation figure that gear and engine speed are chosen in process for gear of the present invention.

Specific embodiment

The specific implementation method of the present invention is as follows：

Hybrid vehicle is the new-energy automobile driven jointly by electromotor and motor, in order to preferably adapt to various Operating mode and the dynamic property of hybrid vehicle is improved, often add change speed gear box on hybrid vehicle, and change speed gear box is changed Whether gear opportunity as orthodox car, is chosen according to engine speed high efficient district and currently shifts gears, and chooses high gear still Low gear, it is different yet with the accelerated mode of different drivers, in the case of particularly different operating conditions or demand difference, if Only consider present engine Effec-tive Function, the operation sense of driver may be met, such as driver when accelerating to overtake other vehicles, With the increase of gas pedal aperture, engine speed also can be with increase, when engine speed reaches gearshift rotating speed, speed change Case can shift gears and enter high gear, engine output torque is reduced on the contrary, so as to have influence on the speed of speed lifting, be unfavorable for Overtake other vehicles, or even vehicle accident occurs, thus, technical scheme proposed by the present invention is to ensure that electromotor running efficiency is high and simultaneous Turn round and look at the process for gear of operator sense.

The technical side of the present invention is illustrated below for the concrete grammar of the change speed gear box selection gear under vehicle running state Case：

Heretofore described hybrid vehicle includes electromotor, change speed gear box, motor, the electromotor, change speed gear box, electricity Motivation is sequentially connected, and the electromotor drives the hybrid vehicle, and the electromotor and institute jointly with the motor Stating motor can be operated alone vehicle traveling, by motor-driven vehicle during vehicle launch, send out after speed reaches certain value Motivation starts offer vehicle power.

Fig. 1 is the corresponding relation figure that gear chooses with engine speed in process for gear of the present invention, wherein V1, V2, V3, V4 For four tachometer values of electromotor, and V1<V2<V3<V4, rotating speed interval V1～V3, V2～V4 send out when being respectively low gear and high gear The high efficient district of motivation, maintains under corresponding to the engine high-efficiency area to determine current vehicle speed according to change speed gear box difference gear The gear chosen when the engine high-efficiency area runs, the change speed gear box is selected from described selection in gear, i.e. electromotor In interval V2～V3, the change speed gear box can select high gear or low gear to rotating speed, now, by presetting one or more throttle Tread depths value and velocity amplitude, the gas pedal depth trampled depth and speed, contrast Real-time Collection of Real-time Collection gas pedal Degree and speed and preset value, if gas pedal tramples depth and velocity amplitude more than or equal to preset value, illustrate that Current vehicle is in Accelerate or overtake other vehicles etc. state, and demand speed is quickly improved, then the change speed gear box chooses low gear, to improve vehicle traction moment of torsion, Satisfaction is overtaken other vehicles or acceleration demand, if gas pedal tramples depth or velocity amplitude less than preset value, illustrates Current vehicle speed-raising demand It is not high, can slowly lift speed, then the change speed gear box chooses high gear, to improve the efficiency of electromotor.

When engine speed is between V3～V4 and trample depth and the speed of Real-time Collection gas pedal are more than or wait In larger preset value, illustrate that Current vehicle accelerates or demand of overtaking other vehicles is larger, demand speed is quickly improved, then the change speed gear box is cut Low gear is shifted to, to improve vehicle traction moment of torsion, satisfaction is overtaken other vehicles or acceleration demand.

During the gearbox shifting, the engine power occurs short interruption, if vehicle needs quick speed-raising, Then of short duration power interruption can bring obvious pause and transition in rhythm or melody sense, cause power output discontinuous and sensation that power is delayed, therefore, The hybrid vehicle is driven during gearbox shifting according to being currently needed for providing vehicle drive force by the motor Operation, until change speed gear box is completed after gearshift, can be by engine driving.

The gas pedal tramples the preset value of depth and speed it can also be provided that multiple, when gas pedal tramples depth And speed can control change speed gear box and choose low-grade location when exceeding relatively low preset value, and only vehicle drive force improved by electromotor, Can control change speed gear box when depth and speed exceed higher preset value and choose low-grade location when gas pedal is trampled, by electromotor with Motor improves vehicle drive force simultaneously.

For for the present invention one exemplary embodiment, it should be understood that be in the protection domain of claims of the present invention A certain demonstrative example therein, with the directiveness effect that those skilled in the art are realized with corresponding technical scheme, and Non- limitation of the invention.

Claims

1. a kind of hybrid vehicle process for gear, it is characterised in that the hybrid vehicle include electromotor, change speed gear box, Motor, the electromotor, change speed gear box, motor are sequentially connected, and the electromotor drives described mixed jointly with the motor Power vehicle is closed, Real-time Collection gas pedal tramples depth and speed, depth is trampled and velocity estimated works as forerunner according to described Dynamic demand simultaneously chooses the change speed gear box gear.

2. hybrid vehicle process for gear according to claim 1, it is characterised in that preset one or more throttles and step on Plate depth value and velocity amplitude, the gas pedal for contrasting Real-time Collection tramples depth and speed and preset value, and the gas pedal is stepped on Step on depth value and velocity amplitude is bigger, the change speed gear box is chosen and gets over low gear, and vehicle traction moment of torsion is bigger.

3. hybrid vehicle process for gear according to claim 1 and 2, it is characterised in that the gearbox shifting mistake Cheng Zhong, the engine power interrupts, the hybrid vehicle operation by described in the motor-driven.

4. hybrid vehicle process for gear according to claim 1, it is characterised in that the hybrid vehicle is also wrapped Electrical source of power is included, for providing the motor-driven required drive, the electrical source of power is power-type electrical source of power.

5. hybrid vehicle process for gear according to claim 4, it is characterised in that the electrical source of power is super electricity Hold.