Combustion Engine Concepts

Front

Purpose of the air-fuel mixture in a combustion engine

Back

To provide the correct ratio of air to fuel for efficient combustion and engine performance.

Front

Definition of 'stoichiometric ratio'

Back

The ideal air-fuel ratio for complete combustion, typically 14.7:1 for petrol engines.

Front

EGR stands for

Back

Exhaust Gas Recirculation

Front

Function of an EGR valve

Back

To reduce nitrogen oxide emissions by recirculating a portion of the exhaust gases back into the engine cylinders.

Front

DPF stands for

Back

Diesel Particulate Filter

Front

Role of a DPF in a diesel engine

Back

To capture and store soot from the exhaust to reduce particulate emissions.

Front

Explanation of 'spark ignition'

Back

A method of igniting the air-fuel mixture in a petrol engine using a spark plug.

Front

Main component of an ignition system

Back

The spark plug, which produces the spark to ignite the air-fuel mixture.

Front

Meaning of 'exhaust manifold'

Back

A component that collects exhaust gases from multiple cylinders and directs them into a single pipe.

Front

Importance of the catalytic converter in the exhaust system

Back

To convert harmful pollutants in exhaust gases into less harmful emissions before they are released into the atmosphere.