| 摘要 |
<p>A method of accurately determining the top dead centre position of a piston (11) and a cylinder (12) of a reciprocating type of internal combustion engine (10) when inoperative which has a crankshaft (13) driven in use by the piston (11) via a piston rod (14), the method comprising the steps of connecting to a space (28) in the cylinder (12), a pressure sensitive switch (30, 31) of the kind which is adapted to change its operating state in response to sensing a pressure above or below a threshold pressure to open or close an electrical circuit, the method further comprising connecting the pressure sensitive switch (30, 31) in an electrical circuit which includes an indicating means (45, 46; 45a^_) to indicate when the operating state of the pressure sensitive switch (30, 31) changes, turning the crankshaft (13) manually until the indicating means (45, 46; 45a^_) indicates no change of operating state of the pressure sensitive switch (30, 31) for a corresponding movement of the crankshaft (13).</p> |
