By-pass field trials
23rd January 1982, Page 10
23rd January 1982
Page 10
Page 10, 23rd January 1982
— By-pass field trials
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The standard engine is, of course, a two-stroke design and as such uses a gear-driven Roots supercharger for scavenging.
The by-pass system is claimed to allow the engine to take maximum advantage from the addi tion of a high-efficiency turbocharger.
At low boost, the Roots blower supplies the air whereas, at high boost, the by-pass valve opens and unloads the supercharger.
According to Detroit Diesel, the use of the by-pass blower reduces the parasitic power loss associated with the positively driven supercharger and can also be used with air-to-air charge cooling.