• Legacy Piston Actuator - 2 port design

• Synchronic Piston Actuator - 4 port design

Legacy Actuatorvs

Synchronic Actuator

• Legacy Piston Actuator - 2 chamber design

• Synchronic Piston Actuator - 4 chamber design

Legacy Actuatorvs

Synchronic Actuator

• Legacy Piston Actuator - 2 surface design

• Synchronic Piston Actuator - 4 surface design

Legacy Actuatorvs

Synchronic Actuator

• Pressure to each port & chamber acts on their respective surface area.

• The force produced by the pressure depends on the surface area

Legacy Actuatorvs

Synchronic Actuator

Unlike the legacy actuator, the Synchronic actuator geometry is a self centering geometry

under pressure

Legacy Actuatorvs

Synchronic Actuator

Spring Pre-Load

Spring Rate

Spring Rate

•Flexible Diaphragm Actuator

•Unequal Actuation Surface Areas

•1 Axis for Valve Guiding

•2-Port, 2-Chamber, 2-Surface Actuator

•Spring-Biased

•Billet Aluminum Piston Actuator

•Ratiometric Actuation Surface Areas

•4 Axes for Valve Guiding

•4-Port, 4-Chamber, 4-Surface Actuator Design

•Spring-Biased

•Diaphragms can tear

•Diaphragm durometer changes with temperature

•Could get harder or softer

•Stretchability is variable

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

•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

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

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

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

The legacy wastegate only allows adjustment of spring pre-load to control when the wastegate

opens and the resultant boost level.

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.

Spring Rate = 25 lbs./in.

As you increase spring rate, the diaphragm will have to stretch more to accommodate the

resistance.

Spring Rate = 25 lbs./in.

Spring Rate = 25 lbs./in.

The reduction in overall valve lift then produces boost creep.

Spring Rate = 25 lbs./in.

Spring Rate = 25 lbs./in.

•Adjust Spring Pre-Load

•Adjust Spring Pre-Load

•Vary Spring Rate Only

•Adjust Spring Pre-Load

•Vary Spring Rate Only

•6 Different Built-In Boost Levels Without a Boost Controller

•Adjust Spring Pre-Load

•Vary Spring Rate Only

•6 Different Built-In Boost Levels Without a Boost Controller

•Variable Exhaust Flow Control

•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

•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

Boost Signal to Port C&D, 36 mm Valve Seat, Pre-Load Adjustments

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RPM

HP

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0.5

1

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2.5

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4.5

5

Boos

HP 36 mmC&D

HP PL 1

Torque Pre-Load

Torque 36 mm

36 mm C+D

Pre-Load 1

Boost-Only Pressure

Signal

Boost-Only Pressure

Signal

Boost-Only Pressure

Signal

Boost-Only Pressure

Signal

Boost-Only Pressure

Signal

Boost-Only Pressure

Signal

Boost Pressure Settings

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RPM

36 mm D

36 mm C+A

36 mm C

36 mm C+D+A

36 mm C+D

Boost Settings HP Results

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1821

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2200

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7800

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8400

8600

8800

36 mm D

36 mm C+A

36 mm C

36 mm C+D+A

36 mm C+D

Different size valve seats allow for fine tuning of

flow and performance

Boost Signal to Port C 28 vs 36 mm Valve Seat

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8750

RPM

HP

0

1

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7

Boos

HP 36 mm C

HP 28 mm C

28 MM C

36 mm C

Boost Signal to Port D 28 vs 36 mm Valve Seat

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5150

5350

5550

5750

5950

6150

6350

6550

6750

6950

7150

7350

7550

7750

7950

8150

8350

8550

8750

RPM

HP

0

1

2

3

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5

6

7

8

Boos

HP 36 mm D

HP 28 mm D

28 MM D

36 mm D

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

Boost-Only Pressure

Signal

Solenoid

Boost/VacuumSignal

Exhaust manifold vacuum between gears and under decel is bypassed through the WG eliminating loss of inertia