As for a diesel engine， lack of combustion air may be due to （）.
举一反三
- If the engine does start on air， but combustion does not immediately begin， the cause may not be （）.
- Diesel engine is an external combustion engine.
- Which statement about diesel engine combustion is true?（）
- Successful combustion inside the cylinders of a diesel engine is dependent upon （）.
- A diesel engine with a combustion chamber located between the crowns of two pistons is known as a/an （）.