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Vehicle and brake feedback control method thereof

A technology of brake feedback and control method, which is applied in the direction of road vehicle drive control system, control drive, control device, etc., can solve the problems of complex control process, poor braking feeling, low braking energy recovery rate, etc., and the method is simple. The effect of reliable, smooth drivability, great fuel economy

Active Publication Date: 2015-01-14
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The former does not adjust the original friction braking force, and the feedback braking force is added to the original friction braking to realize the braking function together, the braking energy recovery rate is low, and the braking feeling is poor; the latter needs to adjust the friction force, The braking energy recovery rate is relatively large, and the braking feeling is also good, but the control process is relatively complicated due to the difficulty in adjusting the frictional braking force

Method used

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  • Vehicle and brake feedback control method thereof
  • Vehicle and brake feedback control method thereof
  • Vehicle and brake feedback control method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0162] Such as figure 2 As shown, the engine unit 1 is connected to the input end 313 of the double clutch 31, the first output end 311 of the double clutch 31 is connected to the first input shaft 21, and the second output end 312 of the double clutch 31 is connected to the second input shaft 22, The second input shaft 22 is coaxially sleeved on the first input shaft 21 .

[0163] A driving gear 25 is fixedly arranged on the first input shaft 21 and the second input shaft 22 respectively, and the first motor generator 41 is indirectly driven with the driving gear 25 on the second input shaft 22 through an intermediate gear 411 . Two driven gears 26 are fixedly arranged on the output shaft 24 , and the two driven gears 26 respectively mesh with the driving gears 25 on the first input shaft 21 and the second input shaft 22 to form two transmission gears.

[0164] The synchronizer 6 is arranged on the output shaft 24, and the driving gear of the main reducer (that is, the outp...

Embodiment 2

[0192] Such as image 3 As shown, the power transmission system 100 in this embodiment and figure 2 The difference of the power transmission system 100 in the above may only lie in the arrangement form of the second motor generator 43 . In this embodiment, each second motor-generator 43 drives the corresponding rear wheel 220 through a second speed change mechanism 72, and the remaining parts can be connected with figure 2 The power transmission system 100 in the embodiment is basically the same, and will not be repeated here. As for the specific working conditions, it is related to figure 2 The power transmission system 100 in the embodiment is basically the same, and the only difference is that the power transmission between the second motor generator 43 and the corresponding rear wheel 220 needs to go through the second transmission mechanism 72 , which will not be described in detail here.

Embodiment 3

[0194] Such as Figure 4 As shown, the power transmission system 100 in this embodiment and figure 2 The difference of the power transmission system 100 in the above may only lie in the arrangement form of the second motor generator 43 . In this embodiment, the second motor-generator 43 is one and drives the corresponding rear wheel 220 through a first speed change mechanism 71, and the remaining parts can be connected with figure 2 The power transmission system 100 in the embodiment is basically the same, and will not be repeated here. As for the specific working conditions, it is related to figure 2 The power transmission system 100 in the embodiment is basically the same, and the only difference is that the two rear wheels 220 are driven by a second motor-generator 43 and a first speed change mechanism 71, so without adding new components, only The differential function of the two rear wheels 220 cannot be realized by a motor and a transmission mechanism, but it can b...

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PUM

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Abstract

The invention discloses a vehicle and a brake feedback control method of the vehicle. The brake feedback control method comprises the following steps: detecting the current speed of the vehicle and the depth of a brake pedal of the vehicle; controlling the vehicle to enter a brake feedback control mode when the current speed of the vehicle is higher than a preset vehicle speed, the depth of the brake pedal is more than 0, and an anti-lock brake system of the vehicle stays at a non-work state, acquiring a needed brake torque corresponding to the vehicle according to the depth of the brake pedal when the vehicle stays at the brake feedback control mode, and allocating the brake torque of a first electric generator, the brake torque of a second electric generator and the brake torque for the basic brake of the vehicle according to the needed brake torque. By adopting the brake feedback control method of the vehicle, the energy can be reasonably allocated between the engine unit and the electric generators when the vehicle brakes, the brake feedback efficiency is improved, and high fuel economical performance, low emission and stable driving performance can be acquired.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to a vehicle braking feedback control method and a vehicle. Background technique [0002] At present, most of the mechanical energy in the braking process of the car is converted into heat energy through the friction of the brake and consumed. Although a control method for braking energy recovery of electric vehicles is disclosed in the related art, it only considers factors such as the power battery and the motor generator system, and controls the recoverable current of the electric vehicle during braking according to the feedback torque value of the motor generator. , complete the recovery of braking energy. [0003] Moreover, most of the brake feedback control strategies in the related art are aimed at parallel / series two-drive hybrid electric vehicles, which are mainly divided into two categories: parallel control strategies and series control strategies. The former does n...

Claims

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Application Information

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IPC IPC(8): B60L7/18B60L7/26B60L50/15B60L50/16
CPCB60K1/00B60K6/387B60K6/442B60K6/48B60K6/52B60K7/00B60K17/354B60K17/356B60K2001/001B60K2007/0061B60K2007/0092B60L3/108B60L3/12B60L7/14B60L7/26B60L15/2009B60L15/2045B60L15/2054B60L2210/30B60L2210/40B60L2220/44B60L2220/46B60L2240/12B60L2240/421B60L2240/423B60L2240/425B60L2240/427B60L2240/429B60L2240/445B60L2240/465B60L2240/486B60L2240/507B60L2240/80B60L2250/26B60L2260/28B60L2270/12B60L2270/145B60W10/08B60W10/18B60W20/00B60W20/10B60W30/18127B60W2510/18B60W2520/10B60W2540/12B60W2710/18B60W2720/403B60Y2200/92B60K1/02B60W20/15B60L50/16B60L50/61B60L58/21Y02T10/62Y02T10/64Y02T10/70Y02T10/7072Y02T10/72Y10S903/916Y10S903/947B60K6/22B60Y2300/18125B60Y2300/182B60Y2300/89
Inventor 杨冬生廉玉波张金涛罗红斌
Owner BYD CO LTD
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