| 摘要 |
<p>A piston type pneumatic engine, including a cylinder block, a piston (1), a cylinder (2), a crankshaft (26), a connecting rod (3), a camshaft (4) and a device for controlling the opening or closing of air valves. A cylinder cover (5) is arranged on the cylinder (2) and the cylinder cover (5) is provided with an inwardly-opened compressed gas intake valve (7) and an exhaust valve (6). A camshaft (4) is provided with an intake cam (8) and an exhaust cam (9), and the crankshaft (26) drives the camshaft (4) by a timing chain or belt (22). The intake valve (7) and exhaust valve (6) are opened or closed by a rocker arm (17) so that high-pressure gas into the cylinder (2) can be controlled to drive piston (1) to reciprocate and to discharge low-pressure gas out of the cylinder (2). The piston (1) drives the crankshaft (26) to rotate and to output power by the connecting rod (3). An air suction valve (11) is arranged on the cylinder cover (5) and an air suction cam (12) is arranged on the camshaft (4). The air suction valve (11) is opened or closed by the rocker arm (17) for controlling the opening or closing time of the air suction valve (11) when the cylinder (2) sucks or stops sucking air outside the cylinder (2). The bore stroke ratio of the cylinder (2) can be 1:2~15.</p> |
