§-Quick questions
NSWEngineering StudiesPersonal and Public Transport
Quick questions on Internal combustion engines: HSC Engineering Studies Personal and Public Transport
3short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.
What is the four-stroke Otto cycle?Show answer
The four-stroke petrol engine cycle uses two crankshaft revolutions per cylinder per cycle:
What is the two-stroke cycle?Show answer
A two-stroke engine completes a cycle in one crankshaft revolution. The intake and compression occur simultaneously (compression on top of the piston, intake below it), and the power and exhaust occur together. Two-stroke engines have more power strokes per revolution (so more power per litre of displacement) but burn oil with fuel, emit more pollution, and are now used mostly in chainsaws, small outboards and some motorcycles.
What is australian context?Show answer
The Holden Commodore (1978-2017) used Australian-made petrol V6 and V8 engines. The Ford Falcon (1960-2016) was a parallel programme. Both ended local manufacturing in 2016-2017. Australian-market vehicles now use imported powertrains from Japan, Thailand, Korea, Germany and the United States.
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