The data of engine valve timing is as follows:
- inlet valve opens 6' before top dead centre;
- inlet valve closes 35' after bottom dead centre;
- exhaust valve opens 38' before bottom dead centre;
- exhaust valve closes 5' after top dead centre.
Draw the valve timing diagram.
(b) Calculate:
(i) The overlap;
(ii) The total period the inlet valve remained closed after bottom dead centre;
(iii) The total period the exhaust valve was opened during the operation.