Aquamist Water Injection Pump PUMP DESIGN
ERL Aquamist have ruled out the widely available centrifugal pump as the pumping mechanism, because it is always coupled to a high rotational-speed drive-motor for efficency reasons, hence it is prone to wear; further problems arise when the water inside the pump is frozen, the drive motor has to be detached from the vane by a slipping clutch arrangement so drive-motor windings cannot be damaged as a result of jamming, this led to unecessary expenses and complicated mechanical links. In addition, high speed drive motor tends to suffer from burn-out under prolonged continuous running.
THE ERL ELECTROMAGNETIC PUMP
In order to find a pump that will reliably perform under the harsh environment of the engine bay, Aquamist had no alternatives but to design their own. The ERL electro-magnetic pump is the result of a two-year intense mechanical and electronic research and developement programme. A high pressure pump with NO mechanical links, thus eliminating damages caused by jamming. The special magnetic stainless armature is set in motion by a strong magnetic field induced by a powerful solenoid. Water is then delivered without being in contact with the drive-motor. Pressure and delivery rate is regulated by internal high-tech electronic circuitry.
HOW IT WORKS
As seen form the diagram below, the construction of the centre of the pump is very similar to a bicycle pump with two valves, one priming and one output valve. The similarity ends when the manual pump actions is replaced by electro-magnetic fields and speed is also cranked up to about 50 strokes a second! Water is being filled and retained between the two valves during the induction stroke (armature is pulled against the spring), water is then pushed out by the action of a compressed spring and the armature when the electric-field is shut-off, high pressure is the product of spring force and the cross-section area of the armature tip. Peak pressure can go as high as 250psi!, perfectly suiting the atomising jets requirement.
SPECIFICATIONS
Input Voltage: 12.5VDC to 14.3VDC
Input Current: 12ADC max, 10mA standby
Control Input: 0-12V @5mA (Digital)
Delivery: 300cc per minute @ 6Bars
Weight: 1Kg (2.2lb)
|
|
