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US 7,461,569 B2Granted
Solenoid device for engaging power takeoffs
AssigneeOmfb S.P.A. Hydraulic Components
InventorAmedeo Bianchi
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AssigneeOmfb S.P.A. Hydraulic Components
InventorAmedeo Bianchi
Estimating the term…
A device for engaging power takeoffs, primarily used to drive a load from the engine of a vehicle, has an electromagnet with a single winding of small size which is driven by a microprocessor system in PWM mode allowing to differentiate the current intensity of the engaging phase and of the phase of maintaining said engaging. The control system monitors, without the aid of external sensors, parameters such as electromagnet current, power supply and electromagnet voltage, electromagnet winding resistance, electromagnet winding inductance. From these parameters, the system is able to determine the engaging or unengaging position of the power takeoff, and it is able automatically to uncouple if the monitored parameters do not fall within the expected ranges, simultaneously notifying the user of the protective intervention.
Engaging device for power takeoffs, comprising
Power takeoff comprising a main gear which is engaged with the gear inside the transmission of a motor vehicle, one or more driven or auxiliary gears, which are engaged with said main gear, at least one output shaft adapted to transmits motion from the driven gears to the external device, and a engaging device as claimed in any of the previous claims.
Method for operating a engaging assembly of a power takeoff by means of electromagnet, comprising the steps of:
Dependencies are inferred from the claim text.