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Device and method for controlling an operation of a retarder in a motor vehicle

A technology for a reducer and a motor vehicle, which is applied in the field of controlling the work of a motor vehicle reducer and computer program products, and can solve the problems of undesired reduction of the torque of the reducer, the oil of the reducer reaching its self-ignition temperature, and increasing the risk of self-ignition.

Inactive Publication Date: 2012-05-23
SCANIA CV AB
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Failure in the cooling system could cause the retarder oil to reach its auto-ignition temperature with potentially disastrous consequences for the driver, passengers and other road users and the vehicle itself
[0008] Temperature sensors have inherent characteristics that cause delays in sensor heating
This means that if a too low limit value is set for it, an undesired reduction of the reducer torque may be activated
On the other hand, setting the limit value for activating the retarder torque reduction too high increases the risk of auto-ignition in the event of a fault in cooling the retarder cooler

Method used

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  • Device and method for controlling an operation of a retarder in a motor vehicle
  • Device and method for controlling an operation of a retarder in a motor vehicle
  • Device and method for controlling an operation of a retarder in a motor vehicle

Examples

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Embodiment Construction

[0049] figure 1 A side view of vehicle 100 is shown. Exemplary vehicle 100 includes tow unit 110 and trailer 112 . The vehicle can be a heavy vehicle such as a truck or a bus. Alternatively, the vehicle may be a passenger car.

[0050]The term "link" here refers to a communication link, which may be a physical connection, such as an optoelectronic communication line, or a non-physical connection, such as a wireless connection, such as a radio link or a microwave link.

[0051] The term "line" here means a line for conveying a fluid such as coolant or gear oil. Routes are physical lines, such as pipes or hoses. It can be of any desired size. It can also be made of any desired suitable material, such as rubber or plastic. The lines can be made of metal or metal alloys, such as aluminum or stainless steel.

[0052] figure 2 schematically shows the figure 1 Subsystem 299 of motor vehicle 100 is shown. Subsystem 299 includes vehicle cooler 220 connected to engine 230 via...

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PUM

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Abstract

The invention relates to a method for controlling retarder operation of a motor vehicle (100, 110), comprising the steps of: - continuously detecting temperatures (T) of the retarder's fluid (graph a); - continuously determining a change in the detected temperature; and - automatically disconnecting the operation of the retarder when said detected temperature exceeds a predetermined temperature. Said predetermined temperature (graph b) is determined continuously on the basis of the magnitude of the change per unit time. The invention relates also to a computer programme product comprising programme code for a computer for implementing a method according to the invention. The invention relates also to a device and a motor vehicle equipped with the device.

Description

technical field [0001] The invention relates to a method for controlling the operation of a motor vehicle retarder. The invention also relates to a computer program product comprising program code for causing a computer to carry out the method according to the invention. The invention also relates to a device for controlling the operation of a motor vehicle retarder and a motor vehicle equipped with such a device. Background technique [0002] Some of today's vehicles are equipped with hydrodynamic additional brakes called retarders. When the oil flows in the closed system between the reducer and the reducer cooler, the reducer oil of the reducer is cooled by the reducer cooler. The reducer cooler is cooled by the cooling system, which includes the vehicle's cooler and the coolant circulating in the cooling system. [0003] The temperature sensor currently located downstream of the retarder cooler is adapted to measure the temperature of the retarder oil after cooling of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60T10/02B60T1/087
CPCB60T17/02B60T10/02B60T1/087
Inventor T·赛林M·松内留斯
Owner SCANIA CV AB
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