Question

Which one of the following is a limitation of a two stroke engine when compared with a four stroke engine?​

Answer 1

Answer:

Two-stroke engines require pre-mixing of oil and fuel, while the 4-strokes do not. Four-strokes are more environmentally friendly; in a 2-stroke engine, burnt oil is also released into the air with the exhaust.

Answer 2

The limitations of a two-stroke engine when compared with a four-stroke engine are as follows:

• In a two-stroke engine, one power stroke corresponds to one crankshaft revolution, whereas in a four-stroke engine, one power stroke corresponds to two crankshaft revolutions.
• The thermal efficiency of a two-stroke engine is low, and it consumes a lot of gasoline.
• The thermal efficiency of a four-stroke engine is high, yet fuel consumption is low.
• Two-stroke engines cannot function at all speeds with the same efficiency.
• At all speeds, four-stroke engines may function at the same efficiency.