Page 51 - E BOOK ENGINE MECHANICAL M2

1. GENERAL

8. KNOWLEDGE CHECK
Regarding the following sentences of a diesel engine, identify which ones are correct or incorrect,
and make the required correction to the wrong portion of the incorrect sentence.
(1) In the operation of a diesel engine, the mixed air with fuel is compressed to a high temperature
and a high pressure, and the fuel injected subsequently there for spontaneous ignition and combus-
tion.
(2) In the operation of a diesel engine, the engine output control is done by adjusting the intake air
amount sucked into the cylinders.
(3) The thermal efficiency of the diesel engine is higher than the gasoline engine’s one, and the fuel
economy is superior while driving at lower engine speed and lower engine load.
(4) The in-direct injection type combustion chamber has a multi-hole type injection nozzle.
(5) Diesel knocking occurs if the combustion pressure decreases abruptly in the flame propagation
period.
(6) The diesel fuel has lower ignition point than the gasoline.

1 - 8 Pub. No. PTAE1228