A Three-Position Solenoid for an EVAP System
Customer Problem
Sealed automotive fuel tanks use an evaporative emission control (EVAP) system to comply with emissions standards. When the engine is not running, fuel vapors are absorbed and stored in a charcoal canister instead of being vented to the atmosphere. Once the engine starts, the vapors are purged into the engine’s intake manifold to be burned off during combustion. A manufacturer needed a solution to open and close the charcoal canister vent valve.
The TLX Solution
TLX Technologies designed a three-position push/pull solenoid to actuate the charcoal canister vent valve. The first position closed the valve during refueling. The second position allowed fuel vapors to purge directly to the intake manifold while the engine was running. The third position routed fuel vapors into the charcoal canister while the engine was turned off. This durable solenoid had a lifespan of more than 10 million cycles.
Three-Position Push/Pull Solenoid
- Stroke from center position
- 1.58 to 25.4 mm
- Push/pull force
- 0.29 to 44.13 N
- Supply voltage
- 3 to 48 Vdc
- Duty rating (%ED)
- 100%
- Operating temperature range
- -40°C to 120°C (-40°F to 248°F)
- Durability
- > 10M cycles
Every TLX solution is custom engineered to meet the requirements of its application. Technical specifications shown on this website are intended to illustrate typical performance and design characteristics.
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