Method and device for evaluating exhaust gas temperature in motor vehicle

A technology for exhaust temperature and motor vehicles, which is applied in the direction of machines/engines, electrical control, mechanical equipment, etc., and can solve problems such as unreliable and weakened requirements

Inactive Publication Date: 2010-06-23
FORD GLOBAL TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it must be realized that even very precise temperature sensors have a time constant of several seconds, which means that this type of sensor is critical for precise instantaneous measurement of the exhaust gas temperature or the inlet temperature Ti of the exhaust gas at the inlet of the exhaust turbine. Requirements are not very reliable
Also, the long-term behavior of this method can be impaired by other factors such as soot particles attached to the sensor element

Method used

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  • Method and device for evaluating exhaust gas temperature in motor vehicle
  • Method and device for evaluating exhaust gas temperature in motor vehicle
  • Method and device for evaluating exhaust gas temperature in motor vehicle

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Embodiment Construction

[0018] The invention will be explained in more detail below with the aid of preferred exemplary embodiments and with reference to the drawings.

[0019] The following abbreviations are used in this manual:

[0020] T o Turbine outlet temperature (in Kelvin K);

[0021] T i Turbine inlet temperature (in Kelvin K);

[0022] T3 Exhaust temperature (in Kelvin K);

[0023] P o Turbine outlet pressure (in bar);

[0024] P i Turbine inlet pressure (in bar);

[0025] NT turbocharger speed (in revolutions per minute rpm);

[0026] NT corr Corrected turbocharger speed (in revolutions per minute rpm);

[0027] VNT impeller position (in % or angle) (optional);

[0028] γ ratio of specific heat (dimensionless);

[0029] n TS total / static efficiency (values ​​range from 0 to 1);

[0030] n M Mechanical efficiency (values ​​range from 0 to 1).

[0031] According to the invention, the turbocharger speed is determined by using a turbocharger s...

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Abstract

The invention discloses a method and device for evaluating the exhaust gas temperature in a motor vehicle. The motor vehicle has a turbocharger system with an exhaust-gas turbine. The exhaust gas temperature (Ti) at an inlet in the exhaust-gas turbine is estimated. The estimation of the exhaust gas temperature takes place based on a turbocharger speed of the turbocharger system. According to the invention, the exhaust-gas turbine can be better protected, in particular during the transient phase.

Description

【Technical field】 [0001] The present invention relates to a method and apparatus for estimating exhaust gas temperature in a motor vehicle. 【Background technique】 [0002] It is believed that turbocharger speed sensors (TSS) will become standard equipment in new motor vehicles with turbochargers in the near future. Such turbocharger sensors can be used to provide additional information about the current state of the turbocharger, which can improve the performance and overall power of the motor vehicle. [0003] In order to protect the exhaust turbine located in the exhaust flow, it is often necessary to limit the exhaust gas temperature, especially when the internal combustion engine is operating at full load or at peak load. The exhaust gas temperature corresponds to the inlet temperature of the exhaust gas at the inlet of the exhaust turbine, hereinafter referred to as T3 or Ti. [0004] In one aspect, the limitation of the exhaust gas temperature can be performed in a s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D23/00F02B37/12
CPCF02D41/0007F02D23/00F02D41/1447Y02T10/144Y02T10/12
Inventor S·彼得罗维奇Y·雅库珀
Owner FORD GLOBAL TECH LLC
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