Temperature Mixing

IHKA E32 TEMPERATURE MIXING







On E32 vehicles, the left and right side temperature mixing flaps are operated separately by their own stepper motors, allowing different stratified air discharge temperatures on the left and right sides of the cabin.

Prior to engine start-up, the mixing flaps on both sides are in the "warmest-air" position (fully closed). They are also in the warmest-air position when the IHKA system is turned "Off," and when maximum defrost mode is selected.

Also, if "down" mode is selected on one side of the cabin, the mixing flaps on that side move to the warmest-air position.







When the ignition switch is turned to "Run", and "up/down" or "AUTO" mode is selected, on one side of the cabin, the mixing flaps for that side move to positions, determined by:
- center face-vent thumbwheel position (most important)
- interior temperature
- left (or right) desired temperature
- left (or right) Y-factor







In general, when "up/down" or "auto" mode is selected, the mixing flaps are:
- in the coolest air position (fully open) when the Y-factor is from -25% to 0%
- closed linearly (from fully open to 2/3 closed) at Y-factors from 0% to 5%
- positioned according to thumbwheel setting at Y-factors of 10% to 100%