25
Feb

Water Runoff Management

Written by admin. Posted in Other Details

Another little detail that I took care of to keep the motor compartment dry. The cowling below the windshield is where the intake air comes into the interior, it also needs to deal with water that can come in at any time from rain or washing.

I machined this pair of “downspouts” from ABS block to replace the original gray rubber flap design (image below, bottom right) that simply dribbled water into the engine compartment.

Tubing that slides onto these barbed fittings route the water down and through the new bottom pan to keep the inside of the motor compartment completely dry and clean.

25
Feb

Aerodynamic Drag Reduction

Written by admin. Posted in Other Details

For an incremental reduction in aerodynamic drag, here is the main bottom pan in place.

24
Feb

Close look

Written by admin. Posted in Electrical Enclosure

Here is the Evision circuit board that measures voltages, currents, and steals some isolated power for the controller. It sends out the data on a fiber optic link (blue fitting/black cable)

The Fat current sensor resistors are out of view below the FR4 sheet.

More stuff keeps fitting in, but it is about full now.

10
Feb

The wired result

Written by admin. Posted in Electrical Enclosure

I am using semiconductor pre-charge devices along with the power resistors seen above, in gold color and with cooling fins. They will get little use so they will not be hot normally. In the case of a fault, we will sense it with thermal sensors that can generate a response.

26
Jan

Finished mount

Written by admin. Posted in DC/DC converter

The BMW engineers were thinking of me again, as luck would have it; The two studs you see holding the electrical box were just there, waiting for a use, exactly where needed.

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