railway RRB JE (CBT I + CBT II) Mock Test 2024 Internal Combustion Engine Fuels and Combustion Stoichiometric Air Fuel Ratio
The air-fuel ratios used in the normal operation of SI and CI engines are:
1
Around stoichiometric for both SI and CI
2
Excess air for CI and SI
3
Excess air for CI and around stoichiometric for SI
4
Very rich mixture for SI and lean mixture for CI