Question

The _____________ sensor, checks the temperature of the ambient air entering the engine for fine tuning the mixture strength.

(a) engine temperature

(b) exhaust gas

(c) air flow

(d) air inlet temperature

The question was asked in an international level competition.

This interesting question is from Electronic Injection System topic in portion Electronic Injection Systems of IC Engine

Answer 1

The correct option is (d) air inlet temperature

To elaborate: The air inlet temperature sensor, checks the temperature of the ambient air entering the engine for fine tuning the mixture strength whereas the engine temperature sensor senses the temperature of the engine coolant, and from this data the computer adjusts the mixture strength to rich side for cold starting while the air flow sensor, monitors mass or volume of air flowing into the intake manifold for adjusting the quantity of fuel and exhaust gas senor senses the amount of oxygen in the engine exhaust and calculates air-fuel ratio.