Control valves receive motor sport approval
A
Moog product story
Edited by the Engineeringtalk editorial team
May 22, 2008
Moog Controls' E024 and E050 servo valves and the E050 series micro-solenoid valve have received approval from the FIA.
Three control valves from Moog Controls have received homologation (granting of approval) from the FIA for use with the 2008 Standard Engine Control Unit (ECU).
To race in events such as Formula One, a vehicle and its constituent components must be homologated by the FIA, the world's motor spot governing body.
The Motor Sports Association (MSA), the sole motor sport governing body for the United Kingdom, may also restrict the selection of components to those with FIA homologation.
Moog Controls' E024 and E050 servo valves and the E050 series micro-solenoid valve have received approval.
F1 hydraulics generally operate at temperatures of up to 135C, compared to 60C on typical industrial systems.
In any hydraulic circuit, throttling flow generates heat.
Most industrial systems incorporate large reservoirs and coolers to dissipate the heat.
In contrast, F1 hydraulic reservoirs and coolers are designed to be small and light and with no significant oil mass in the system, so temperatures rise quickly.
A consequence of high temperatures is low oil viscosity.
Therefore, both the E024 and E050 have been designed and optimised to perform to specification, even in these extreme conditions.
They are high-performance proportional valves used for rapid and precise closed loop control of hydraulic actuators.
Typical applications include gear selection, clutch actuation, throttle actuation and control of the differential.
Some car functions require only on-off hydraulic control.
These include engaging reverse gear and opening the "cat-flap", an access door to the fuel filler.
F1 cars also include a special safety feature, the clutch-disengagement system, used after accidents or breakdowns.
Pressing a red button on the dashboard dumps oil stored in an accumulator into the clutch slave cylinder, which opens the clutch and permits race marshals to push the car off the circuit.
For these applications, Moog developed the E050-747 microsolenoid valve.
The three-way, normally closed, two-position valve weighs less than 40g, making it one of the smallest direct-acting hydraulic solenoid valves available.
The valve comprises a single passive coil with a resistance of 135ohm at 25C.
It is available in four versions, identical electrically, the only difference being the size of internal orifices to optimise the valve for different pressures.
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