The diesel engine is often is called a/an _______ ignition engine

The diesel engine is often is called a/an _______ ignition engine

• A. Spark ignition
• B. Compression
• C. Catalytic ignition
• D. Electrical ignition

Answer: (B)

Diesel engines use compression ignition. In the cylinder, air is compressed to a very high pressure, which raises its temperature enough that when fuel is injected it auto-ignites without needing a spark. This is different from spark ignition, used in gasoline engines, where a spark plug ignites a premixed air–fuel mixture. Catalytic ignition isn’t a method used to start combustion in engines, and electrical ignition isn’t the ignition method for diesels (though glow plugs may assist starting in cold conditions).

Diesel engines use compression ignition. In the cylinder, air is compressed to a very high pressure, which raises its temperature enough that when fuel is injected it auto-ignites without needing a spark. This is different from spark ignition, used in gasoline engines, where a spark plug ignites a premixed air–fuel mixture. Catalytic ignition isn’t a method used to start combustion in engines, and electrical ignition isn’t the ignition method for diesels (though glow plugs may assist starting in cold conditions).