Varying Intake Stroke Injection Timings with Wet Ethanol in LTC: A CFD Simulation Study
Computational Fluid Dynamics (CFD) modeling was used to investigate the effects of the direct injection of wet ethanol at various timings during the intake stroke in a diesel engine with a shallow bowl piston. Thermally Stratified Compression Ignition (TSCI) has been proposed to expand the operating range of Low Temperature Combustion (LTC) by broadening the temperature distribution in the cylinder prior to ignition. TSCI can be enabled by using either direct water injection or a split injection strategy of water-fuel mixture that injects at least once during the intake stroke and at least once during the compression stroke. This current study focuses on isolating the effects that the injection during the intake stroke has on the temperature and equivalence ratio distributions before the onset of the combustion process.