| 摘要 |
An internal combustion engine has an inlet air manifold (24), at least one cylinder (16) having a combustion chamber, spark ignitor (26) and a fuel injector (21), a cylinder head (14) including an inlet valve connecting the inlet air manifold to the or each combustion chamber, and a pressure relief valve (26) connecting the combustion chamber to the manifold (24) and operable to pass to the manifold part of the air/fuel mixture in the combustion chamber if the pressure in the combustion chamber during compression exceeds a maximum desired pressure.
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