Microelectronics

1
Clean Diesel Technology HAT- Hydraulically
Actuated Turbine
Brian SangeorzanNoel Balzan, M.S. Student
Objective To develop an efficient,
hydraulically-actuated turbine to minimize turbo
lag in modern, high-speed turbocharged diesel
engines.
Motivation Modern diesel engines offer the
potential for about a 20 increase in fuel
efficiency over their gasoline counterparts.
Acceptance into the U.S. marketplace for light
duty diesel engines will depend upon successes in
reducing particulate and NOx emissions.
Particulates (soot) are formed in fuel-rich
regions, especially during transient operation
during which the air flow lags the increase in
fuel flow. One method proposed for minimizing
the lag in air flow is to hydraulically
accelerate the turbocharger.

• Research Methodology
• Develop a test bed that can be used to measure
  the performance of various hydraulic turbine
  designs
• Develop various turbine and injector designs
• Model and test these designs in order to predict
  their performance in the complete turbocharger.

Preliminary Results The figure to the left shows
the turbine speed and hydraulic oil flow rate for
a test case at 3000 psig hydraulic oil pressure,
using only two (of four) oil injectors.