1. INGAS meeting, Prague, 25-26 Mai 2009 INGAS INtegrated GAS Powertrain 1 Status Siemens AG Dr. Michael Höge 25-26 Mai 2009

2. INGAS meeting, Prague, 25-26 Mai 2009 INGAS INtegrated GAS Powertrain 2 Function and system concept of the Generation 1 injector two piezoelectric actuator guiding cylinder piston (1) hydraulic chamber (1) hydraulic chamber (2) piston (2) needle Advantage:  high and robust needle lift Disadvantage:  production costs  abrasion @ needle

3. INGAS meeting, Prague, 25-26 Mai 2009 INGAS INtegrated GAS Powertrain 3 Function and system concept of the Generation 2 injector one piezoelectric actuator guiding cylinder piston (1) hydraulic chamber (1) hydraulic chamber (2) piston (2) needle Advantage:  less production costs  higher durability due to less abrasion @ needle Disadvantage:  needle lift is more sensible against rail and combustion chamber pressure

4. INGAS meeting, Prague, 25-26 Mai 2009 INGAS INtegrated GAS Powertrain 4 Comparison of Gen1 to Gen2 injector Gen2 injector Gen1 injector

5. INGAS meeting, Prague, 25-26 Mai 2009 INGAS INtegrated GAS Powertrain 5 - 12 stroke amplifier with 3 different diameters of piston (5) and - 3 stroke amplifier with notches to reduce shear stresses Best configuration will be used for Generation 2 Different configurations of Generation 2 injectors

6. INGAS meeting, Prague, 25-26 Mai 2009 INGAS INtegrated GAS Powertrain 6 Development of an optimized nozzle layout Gen 1 ‘slotted’ needle Gen 2 ‘hollow’ needle Larger guiding surface => less stresses => higher durability A Gen1 top = 16mm²A Gen2 top = 60mm² A Gen1 bottom = 50mm² A Gen2 bottom = 190mm²

7. INGAS meeting, Prague, 25-26 Mai 2009 INGAS INtegrated GAS Powertrain 7 Calculation of gas flow Target is 10g/s Calculation of theoretic gas flow @ CT Politecnico di Torino: quantity and diameter of bores / exact quantity of gasflow

8. INGAS meeting, Prague, 25-26 Mai 2009 INGAS INtegrated GAS Powertrain 8 Comparison of the simulated (PT) and theoretically calculated mass flow rate Actual Status @ Siemens CT Boundary conditions @ PT:

9. INGAS meeting, Prague, 25-26 Mai 2009 INGAS INtegrated GAS Powertrain 9 Calculation of the simulated and theoretically calculated mass flow rate Actual Status @ Siemens CT Temperature FEM => 30°C Pressure FEM => 17bar => 272um needle lift ~ 10 g/s Next step => measurement of gas flow @ CT * FEM Results from Politecnico de Torino

10. INGAS meeting, Prague, 25-26 Mai 2009 INGAS INtegrated GAS Powertrain 10 Planning for next time @ Siemens CT

11. INGAS meeting, Prague, 25-26 Mai 2009 INGAS INtegrated GAS Powertrain 11 Siemens CT Dr. Michael Höge Siemens AG Corporate Research and Technologies Power & Sensor Systems / Actuators & Control Otto-Hahn-Ring 6 D-81730 Munich Thank you for your attention!