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Improving
Fuel and Air Mixture
Engines converted to lean burn design
require attention to fuel injection. Optimum fuel admission measures
differ from engine to engine, but may include:
- Using directional fuel injection (DFI)
- Modifying fuel cams and using DFI
- Upgrading to Dresser-Rand's Fuel Management
System for four-cycle gas engines
Directional fuel injection:
- Provides high velocity gas injection that improves mixing
- Provides the initial stratification within the main chamber to
support adequate mixing in the precombustion chamber
- Is used with modified cam timing to support lean burn conversion for
some Dresser-Rand engines
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