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Online determination method for drive torque required by driver

A technology of driver demand and determination method, which is applied in the field of vehicle demand driving torque calibration, and can solve problems such as poor vehicle speed controllability and so on.

Active Publication Date: 2019-08-23
JILIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention proposes an online determination method for the driver's demanded driving torque to solve the problem of poor vehicle speed controllability in various complex road environments

Method used

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  • Online determination method for drive torque required by driver
  • Online determination method for drive torque required by driver
  • Online determination method for drive torque required by driver

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Embodiment Construction

[0076] The present invention will be further described below with reference to the accompanying drawings and embodiments: This invention takes a car with an engine as the power source as an example. The basic parameters of the car are as follows: Table 1:

[0077] Table 1: The basic parameter table of the vehicle in the embodiment of the present invention

[0078] Parameter meaning Parameter value unit Number of stallsn6 Transmission ratio of each gearig

[4.212; 2.637; 1.8; 1.386; 1.0; 0.772] Transmission efficiency η [0.8777; 0.885; 0.9043; 0.9138; 0.9127; 0.9058] Transmission ratio of main reduceri03.51 Wheel radiusr0.350m Rolling resistance coefficientf0.1 Car gravityG1781*9.8N Coefficient of air resistanceCD

0.381 Frontal area A2.52m^2

[0079] The engine characteristics in the embodiment of the present invention are as figure 1 As shown, the process of the online determination method of the driver's required drive torque is as follows figure 2 Shown

[0080] The tec...

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Abstract

The invention relates to an online determination method for drive torque required by a driver and belongs to the technical field of calibration of the drive torque required by a whole vehicle. The method comprises the steps of determining a traveling resistance curve and the largest drive force curve, determining the request curve of drive force required by the wheel end and the highest vehicle speed when an acceleration pedal is 100%, designing an insensitive area and a sensitive area of the acceleration pedal, determining the complete map matrix table of drive force required by the driver ofthe wheel end online, and calculating the required drive torque of the driver to the output end of an engine. The described online determination method for the drive torque required by the driver issimple and practical, calibration of an off-line driver required drive toque map table is not needed, and the development time and cost of the whole vehicle are shortened and reduced. According to themethod, by planning the sensitive area and the insensitive area of the pedal online, acceleration / reduction and vehicle speed easy control performance of a car in various traveling environments is ensured, and the driving quality of the car is effectively improved.

Description

Technical field [0001] The invention belongs to the technical field of calibration of the required driving torque of a complete vehicle, and particularly relates to an online determination method of the required driving torque of a driver. Background technique [0002] With the rapid development of automobiles, consumers pay more and more attention to the driving feeling (driving quality) of automobiles. In the past, the accelerator pedal and the throttle valve were directly mechanically connected, which made it impossible to customize the driving feeling and meet the needs of consumers. Therefore, all cars at this stage adopt electronic throttle valves, which are mapped through the configuration of the accelerator pedal and the required drive torque. If the mapping relationship is not configured properly, the vehicle’s response to the accelerator pedal input is too sensitive, too lagging, and the shifting shock is large, which makes it difficult for the driver to control the sta...

Claims

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Application Information

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IPC IPC(8): B60L15/20
CPCB60L15/20B60L2250/00Y02T10/72
Inventor 管欣金号段春光卢萍萍
Owner JILIN UNIV
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