Functional Description of EGM
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Status September 2003 (EvoBus-Service / AFT)
Page: 15 of 83
To protect the catalyst at excessively high exhaust-gas temperatures, the available engine torque is
limited as a function of the engine speed and exhaust-gas temperature according to the catalyst and
engine speed.
2.2.1.1
Engine protection: charge-air temperature
The engine protection function charge-air temperature is intended to reduce the maximum permissible
engine torque at excessively high charge-air temperatures. The value for the reduction of the available
engine torque is calculated with the engine running from a characteristic curve as a function of the
charge-air temperature and multiplied by the target engine torque.
Engine protection: charge-air temperature
Charge-air temperature
Characteristic curve
Torque limitation at
charge-air temperature
Charge air
Limitation factor
Title:
Service EGM: Motorschutz
File:
kd_mts_LLT.vsd
Date of last change: 2001-09-12
MOB - Torque Limitation at Charge-Air Temperature
Factor [-] = f(Charge-air temp.[°C])
Fac
tor
Charge-Air Temperature
