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A system and a method for controlling braking of a motor vehicle during downhill driving

A driving process, motor vehicle technology, applied in the direction of brakes, brake types, hydraulic brakes, etc., can solve problems such as shortening the service life of foot brake components

Active Publication Date: 2009-06-10
SCANIA CV AB
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This leads to the use of the service brake in many cases even though the auxiliary braking device can independently obtain the required braking effect, so that the service life of the service brake components is shortened

Method used

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  • A system and a method for controlling braking of a motor vehicle during downhill driving
  • A system and a method for controlling braking of a motor vehicle during downhill driving
  • A system and a method for controlling braking of a motor vehicle during downhill driving

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Embodiment Construction

[0019] figure 1 Very schematically shown are the components of the motor vehicle 1 in the form of a truck which are necessary for explaining the invention. The motor vehicle has a front axle 2 , a first rear axle 3 and a second rear axle 4 . These axles have wheels 5 - 12 , of which the wheels 5 , 6 of the front axle 2 are used for steering the vehicle, and the wheels 7 - 10 of the first rear axle 3 are used for driving the vehicle via the driven axle 3 . The wheels 11, 12 of the axle 4 can be lifted from the ground, which is only used when the motor vehicle is heavily loaded.

[0020] The motor vehicle also includes an engine 13 with an output shaft (not shown) connected to a transmission 14, which is an automatic or semi-automatic transmission with a shift lever 15 for selecting different modes, such as neutral, Drive gear, reverse gear, park gear, etc. The transmission 14 has an output shaft 16 which drives the axle 3 via a differential 17 .

[0021] The motor vehicle a...

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PUM

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Abstract

A system for controlling braking of a motor vehicle during downhill driving, in which the vehicle is provided with a service frictional braking device (18) and an auxiliary braking device (25), comprising a retarder brake (26) and a lever (40) for activating the retarder brake by the driver of the vehicle, comprises means (29) adapted to, upon activation of said retarder brake (26) by actuating said lever (40) by the driver for applying a braking action to the vehicle when driving downhill, based upon values of parameters of the driving conditions of the vehicle, calculate whether the auxiliary braking device is able to alone obtain said braking action to be applied to the vehicle. The braking control means (28) is adapted to activate the service frictional braking device to assist said auxiliary braking device when said calculation states that the auxiliary braking device is not able to alone obtain said braking action to be applied to the vehicle.

Description

technical field [0001] The invention relates to a system for braking a motor vehicle when driving downhill, said motor vehicle having a foot-operated friction brake device acting on at least one wheel axle of the motor vehicle to obtain a braking effect and acting on Auxiliary braking device on the driven wheel axle of a motor vehicle to obtain a braking action, the auxiliary braking device includes a retarder brake and a joystick used by the driver of the motor vehicle to activate the retarder brake, the system includes braking Control means for selecting an auxiliary braking mode in which the retarder brake is activated when it is desired to obtain a braking effect which may be obtained by said auxiliary braking means. The invention also relates to a method for controlling the braking of such a motor vehicle when driving downhill. Furthermore, the invention relates to a computer program comprising computer program code for implementing such a method; a computer program prod...

Claims

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Application Information

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IPC IPC(8): B60T10/02B60T13/58B60W10/18B60W30/18
CPCB60T8/00B60W30/18136B60T13/585B60T8/245B60W10/198B60W10/196B60W30/18109B60T10/02B60W10/184
Inventor J·里克曼T·赛林A·延森A·埃斯基尔松U·卡尔松
Owner SCANIA CV AB
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