| 摘要 |
A portable, combustion-engined tool including a combustion chamber (1), a piston (8) adjoining the combustion chamber (1), with a pressure build-up in the combustion chamber (1) providing for movement of the piston (8) from its initial position, in which the piston adjoins the combustion chamber (1), away from the combustion chamber (1), a brake device (43) for retaining the piston (8) substantially in its initial position during build-up of pressure in the combustion chamber (1), and elements for changing a braking force applied to piston (8).
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