| DESCRIPTION |
This is the ultimate water injection system: its function is directly comparable to a standard car's
fuel injection system, except it controls water-flow. In addition, it has diagnostic circuitry
designed to detect blocked water-jets and cut pipes. A special output link from the ECU can
inform other systems in the event of a fault condition, so boost-pressure can be lowered to
minimise engine damage. A pre-pressurized system enables instant response on demand.   |
| WATER PUMP |
|
Specially designed and manufactured by ERL for the sole purpose of pumping water, its delivery
rate is small but generated at very high pressure: a minimum differential pressure of 3 bar is
necessary for the ERL atomising jet. There are no mechanical links between the piston and the
drive motor: the movement of the special magnetic stainless piston is induced by a powerful
magnetic field generated by the on-board electronic controller. Flow and pressure characteristics
are controlled by varying the frequency and the duration of the electrical pulse fed to the
solenoid. |
| MF2 |
|
MF2 is the brain of the system, ultimately responsible for the vital functions of metering the
water delivery rate. The MF2 uses incoming RPM and pressure signals from the sensors in the
engine bay and compares them with a pre-programmed map set by the user. After several signal
conditioning stages it finally arrives at the pulse-width-modulator stage, and the output signal is
then converted into digital pulses before being sent to the electro-magnetic water valve.
|
| MANIFOLD BLOCK |
|
The electro-magnetic water valve and a water pressure switch sit on the top of the anodised
aluminum block. The valve controls the flow rate and the pressure switch (normally set to 5 bars)
limits the water pressure in the event of the pump's malfunctioning (the pump is capable of
reaching a pressure of 12 bars!). There are two additional inlet ports: one for priming the water
pump on start-up, the other for a remote water-pressure gauge. |
| ADJUSTABLE PRESSURE SWITCH |
|
This switch determines the point where the system starts to inject. It is normally fitted to the
vacuum side of the inlet manifold (2D mode). For applications where load signal (throttle angle
sensor) or manifold absolute pressure sensor (MAP sensor) are available, the MF2 can read these
signals and perfom 3-D mapping functions. |
| WATER JET |
 The jet is made of nickel-plated brass with two spiral grooves cut into the centre insert. Water
travelling through these grooves picks up a swirling motion before leaving the small hole on the
tip, causing an atomising effect, turning the water into a fine mist: of course a pressure of at least
3 bar is required. Jet sizes from 0.5mm to 1.0mm are available in 0.1mm increments. |
| FUSED LOOM (Blue) |
|
A high quality splash-proof plug, with seals, hosts eleven UL and CSA approved wires for
connections to the intended equipment/sensors. All mating pins of the socket/plug are gold-plated, all capable of carrying 5 amps of electrical current. An additional pair of wires supplies
a stablised output voltage of 5 volts for driving a MAP (manifold absolute pressure) sensor. Click on TECH-LINK for see schematic diagram |
| MF2 inline fuse (Blue) |
|
Inline fuse rated at 6A for use with the MF2wire loom.
|
| FASTERNERS |
|
All fasteners are made with high quality 316(A4) grade stainless steel: lower grade stainless steel does suffer from corrosion and pitting under the harsh environments of the engine bay |
| Instruction manual |
|
A 20-page comprehensively-written instruction manual discusses every aspect of the MF2 in great detail, including over 20 schematic diagrams and illustrations.
|
| FUSED LOOM (pump) |
|
The 3-wire loom is equipped with a 10A inline fuse. Wire size is very important as the pump draws large currents at start-up of every stroke (45 times/sec.): make sure a 30A wire is used if extension is necessary. |
