Exhaust-to-Intake Temperature Ratio

Ratio of exhaust-gas to charge-air temperature - a sensitive indicator of cylinder fuel balance, valve timing and cooler performance.

EngineExhaustDiagnostics

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This calculator requires JavaScript to compute its result. The formula, symbols, and regulatory sources are shown in the Formula section below.

Formula, assumptions, and limits

r_T = \frac{T_{exh}}{T_{intake}}

Symbol	Meaning	Unit
$T_{exh}$	After-valve exhaust temperature	°C
$T_{intake}$	Receiver charge-air T	°C

Source: MAN ES Operating Guide

Ratio of exhaust-gas to charge-air temperature - a sensitive indicator of cylinder fuel balance, valve timing and cooler performance.