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Legacy Piston Actuator - 2 port design Synchronic Piston Actuator - 4 port design Legacy Actuator vs Synchronic Actuator.

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Presentation on theme: "Legacy Piston Actuator - 2 port design Synchronic Piston Actuator - 4 port design Legacy Actuator vs Synchronic Actuator."— Presentation transcript:

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2 Legacy Piston Actuator - 2 port design Synchronic Piston Actuator - 4 port design Legacy Actuator vs Synchronic Actuator

3 Legacy Piston Actuator - 2 chamber design Synchronic Piston Actuator - 4 chamber design Legacy Actuator vs Synchronic Actuator

4 Legacy Piston Actuator - 2 surface design Synchronic Piston Actuator - 4 surface design Legacy Actuator vs Synchronic Actuator

5 Pressure to each port & chamber acts on their respective surface area. The force produced by the pressure depends on the surface area Legacy Actuator vs Synchronic Actuator

6 Unlike the legacy actuator, the Synchronic actuator geometry is a self centering geometry under pressure Legacy Actuator vs Synchronic Actuator

7 Spring Pre-Load

8 Spring Rate

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11 Flexible Diaphragm Actuator Unequal Actuation Surface Areas 1 Axis for Valve Guiding 2-Port, 2-Chamber, 2-Surface Actuator Spring-Biased

12 Billet Aluminum Piston Actuator Ratiometric Actuation Surface Areas 4 Axes for Valve Guiding 4-Port, 4-Chamber, 4- Surface Actuator Design Spring-Biased

13 Diaphragms can tear Diaphragm durometer changes with temperature Could get harder or softer Stretchability is variable

14 Slow response Non-linear actuation Pressure has to stretch diaphragm before moving the valve

15 You can only adjust spring pre-load You cannot reap the benefits of adjusting spring rate No control of the valve’s rising rate ratio per pound of boost

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17 Pressure is wasted on stretching the diaphragm before acting on the valve

18 While the legacy diaphragm WG stretches the diaphragm, Synchronic Wastegate has already lifted the valve

19 Boost-Only Pressure Signal 5 psi With Synchronic Wastegate spring rate can be changed with the same pre-load, to change the amount of valve lift per pound of boost

20 The legacy wastegate only allows adjustment of spring pre-load to control when the wastegate opens and the resultant boost level.

21 Spring rate cannot be increased independent of pre-load. Higher boost is achieved with a combination of increase pre-load and rate. Spring Rate = 25 lbs./in.

22 As you increase spring rate, the diaphragm will have to stretch more to accommodate the resistance. Spring Rate = 25 lbs./in.

23 The reduction in overall valve lift then produces boost creep. Spring Rate = 25 lbs./in.

24 Adjust Spring Pre-Load

25 Vary Spring Rate Only

26 Adjust Spring Pre-Load Vary Spring Rate Only 6 Different Built-In Boost Levels Without a Boost Controller

27 Adjust Spring Pre-Load Vary Spring Rate Only 6 Different Built-In Boost Levels Without a Boost Controller Variable Exhaust Flow Control

28 Adjust Spring Pre-Load Vary Spring Rate Only 6 Different Built-In Boost Levels Without a Boost Controller Ability to Keep WG Closed Without Using CO2 Variable Exhaust Flow Control

29 Adjust Spring Pre-Load Vary Spring Rate Only 6 Different Built-In Boost Levels Without a Boost Controller Ability to Keep WG Closed Without Using CO2 Potential For Anti-Lag Feature Variable Exhaust Flow Control

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34 Boost-Only Pressure Signal

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43 Different size valve seats allow for fine tuning of flow and performance

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46 1.Determine and set maximum boost pressure 2.Determine flow requirements and select appropriate valve seat 3.Vary spring rate depending on overall valve lift requirements 4.Adjust pre-load to achieve target initial wastegate opening 5.Use a controller to lower boost pressure for conditions that don’t require maximum performance

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48 Boost-Only Pressure Signal Solenoid

49 Boost/Vacuum Signal Exhaust manifold vacuum between gears and under decel is bypassed through the WG eliminating loss of inertia

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