Precisely Metering Inlet and Outlet Pressure

This proportional pneumatic control valve provided precise turbocharger wastegate control with reduced hysteresis and turbo lag.

Customer Problem

An automotive system manufacturer was trying to resolve an issue they were having with achieving more precise control over the position of a turbocharger wastegate. Their current solution was a single valve to control both inlet and outlet pressure, which did not offer enough precision and produced too much hysteresis and turbo lag. The new solution needed to be airtight and small enough to fit in a confined space.

The TLX Solution

TLX worked with the customer to develop a two-valve solution using pneumatic valves with proportional control. One valve proportionally metered the inlet pressure, and one valve metered the outlet pressure. Two valves were chosen because a single multiport valve that provided both inlet and outlet pressure would result in some leakage and less precise control. The valve was small and airtight, provided precise proportional control over the wastegate position, and reduced hysteresis and turbo lag.

View Design Solution

Proportional Pneumatic Control Valve

Supply voltage: 24 Vdc nominal

Coil resistance at 20°C: 131 Ω

Operating temperate range: -40°C to 65°C (-40°F to 150°F)

Operating pressure range: -3 to 124 kPa

Flow rate: 24 l/min @ 80 kPa

Leak rate: < 1 cc/min

Response time: < 3 ms

PWM pressure control: 10-90% duty cycle

PWM vacuum control: 10-90% duty cycle

All TLX components are customized to fit system requirements, meaning technical specifications are unique to each customer and design. Examples given on our website are for illustration purposes only.

Working with TLX

Experienced partner of industry leaders, first-tier suppliers, and OEMs
Direct access to our design and engineering team
Localized production in USA and China
Dependable single-source solution from design to delivery

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Our Process

Step 1 / Initial Review

Our engineering team works directly with you to determine the viability of your program and identify the best solution based on your specifications.

Step 2 / Quote

Quotes include all costs related to your project - tooling, prototype, piece part, production and project specific costs.

Step 3 / Design Review & Prototypes

Our engineering team reviews the design with you and makes any adjustments needed. Prototypes are built according to design specifications for testing.

Step 4 / Testing

Prototypes are tested according to your specifications, with all relevant test data provided to you for evaluation.

Step 5 / APQP

DFMEA’s, PFMEA’s, control plans and process flow diagrams are started to drive the product intent design.

Step 6 / Pre-Production

Working drawings are developed for production. A second prototype build and a set of production parts are made from tooling and thoroughly tested.

Step 7 / PPAP/Production

The final design along with the PPAP (Production Part Approval Process) is developed and the new product enters production.

Step 8 / Ongoing Improvements

Our team collaborates with you to continue making improvements to the product to best meet your needs, increasing efficiency and reducing cost.

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