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Control of a motor vehicle drive train during assisted-control deceleration

A powertrain and motor vehicle technology, applied in motor vehicles, hybrid vehicles, brakes, etc., can solve problems such as undesigned powertrain creep function and driver assistance function coordination

Pending Publication Date: 2021-10-19
PEZHO SITROEN AUTOMOBILS SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Despite this, it is not designed to coordinate the creep function of the powertrain with the driver assistance function

Method used

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  • Control of a motor vehicle drive train during assisted-control deceleration
  • Control of a motor vehicle drive train during assisted-control deceleration
  • Control of a motor vehicle drive train during assisted-control deceleration

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0042] exist figure 1 Above, a motor vehicle 1 for implementing the invention is shown. The motor vehicle 1 comprises a powertrain GMP and a front power wheel axle TRMAY and a rear power wheel axle TRMAR. The motor vehicle also includes a hydraulic braking system F and a driver assistance monitor 10 , a powertrain monitor 20 and a hydraulic braking system monitor 30 .

[0043]The powertrain GMP consists of an internal combustion engine MTH which in turn passes through (e.g. slip and synchronous) front clutch EMBAV, steered front electric motor MELAV, discrete ratio gearbox BV (e.g. with torque converter) and front transfer case DIF1 is connected with the front power wheel axle TRMAV.

[0044] The powertrain GMP also includes the rear motor MELAR, which is sequentially connected to the rear power wheel axle TRMAR through the reducer Red, the rear clutch EMBAR (in the form of a single claw coupling) and the rear transfer case DIF2.

[0045] To supply the front electric motor ...

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PUM

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Abstract

Disclosed is a method for controlling a motor vehicle drive train (GMP) during an assisted control deceleration, comprising determining (E21) a maximum value (123) of braking torque that can be delivered by the drive train, then, taking account of said maximum value (123), determining (E8) a command (301) to be delivered to the drive train (GMP) and applying said command (301) to the drive train, the braking torque maximum value (123) being determined according to the current value of ramping torque of the drive train (GMP).

Description

technical field [0001] The invention relates to the management field of managing the powertrain of a motor vehicle in situations in which driver assistance functions define commands in addition to optional actions of the driver during low-speed movements. [0002] The invention aims in particular to adapt the command for deceleration sent by the driver assistance function to the powertrain to the presence of a pre-existing rampage behavior on the vehicle. Background technique [0003] Note that creep is a behavior of the powertrain by which positive torque is transmitted to the powered wheel axle while the vehicle is moving forward at very low speeds, the engine is revving at low speeds, and the driver is not pressing on the accelerator control superior. [0004] Thus, on a vehicle equipped with a thermal powertrain with an automatic transmission with a torque converter, the creep originates from the torque converter running (which partially transmits the rotation of the e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60W20/10B60W10/04B60W10/18B60W10/188B60W20/00B60W20/15B60W30/14B60W30/18B60W30/188B60T1/00
CPCB60W20/00B60W20/15B60W30/18072B60W2030/18081B60W30/18063B60W30/14B60W30/188B60W10/04B60W10/18B60W10/188B60W2510/0657B60W2510/083B60W2710/0666B60W2710/083B60W2710/182B60W2720/30B60W2050/0027B60W2050/0026B60K6/52B60K6/387B60K6/442B60T7/22B60T2201/02Y02T10/62
Inventor V·恰拉S·图赞
Owner PEZHO SITROEN AUTOMOBILS SA
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