| 摘要 |
An engine exhaust assembly includes an inner pipe for connecting to an engine exhaust port. An outer pipe surrounds a portion of the inner pipe. The inner pipe and the upstream end of the outer pipe form an opening therebetween for receiving air from the environment. An annular cap fills a gap between the inner pipe and the downstream end of the outer pipe. A vent is formed in the inner pipe inside and adjacent to the downstream end of the outer pipe. The flow of exhaust through the inner pipe causes air from the environment to flow into the opening between the inner pipe and outer pipe, through the space between the pipes and into the inner pipe through the vent. The downstream end of the inner pipe projects or extends beyond the downstream end of the outer pipe.
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