Precisely Metering Inlet and Outlet Pressure
Customer Problem
An automotive manufacturer needed a solution that would give more precise control over a pneumatic actuator that controlled a turbocharger wastegate. The component they had been using was a single valve that controlled 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 compact.
The TLX Solution
TLX worked with the customer to develop a two-valve solution using pulse-width-modulated proportional pneumatic control valves. One valve metered the inlet pressure, and one valve metered the outlet pressure. Two valves were chosen because a single multiport valve that regulated both inlet and outlet pressure would produce some leakage, resulting in less precise control. The new valve was small and airtight, provided precise proportional control over the wastegate position, and reduced hysteresis and turbo lag.
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 149°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.
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