BMW I01 Product Information page 42

I01￿High-voltage￿Components
3.￿Electric￿Motor
Index
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The￿O-ring￿seal￿and￿the￿X-sealing￿ring￿must￿be￿replaced￿after￿a￿disconnection￿of￿the￿transmission￿from
the￿electrical￿machine￿
Water￿and￿dirt￿may￿penetrate￿the￿cavity￿within￿the￿transmission￿housing￿which￿can￿be￿seen￿in￿the
graphic.￿This￿is￿not￿a￿problem￿for￿the￿transmission￿–￿however,￿water￿and￿dirt￿must￿be￿prevented￿from
entering￿the￿electrical￿machine￿from￿there.￿For￿this￿purpose,￿the￿sealing￿ring￿marked￿in￿the￿graphic,
which￿has￿the￿letter￿"X"￿in￿the￿cross-section,￿is￿used.
There￿is￿another￿sealing￿ring￿on￿the￿transmission￿input￿shaft.￿It￿seals￿the￿hub￿space￿of￿the￿electrical
machine,￿which￿is￿filled￿with￿grease.￿With￿the￿sealing￿ring￿the￿grease￿filled￿during￿installation￿remains￿in
the￿hub￿space￿and￿ensures￿the￿lubrication￿during￿the￿entire￿service￿life￿of￿the￿vehicle.
Ring-shaped￿through-holes￿arranged￿on￿the￿transmission￿housing￿hold￿the￿aluminium￿screws￿for
connecting￿the￿housing￿of￿the￿transmission￿and￿the￿electrical￿machine.
The￿aluminium￿screws￿must￿be￿replaced￿after￿disassembly￿
Interface￿for￿the￿output￿shafts
The￿output￿shafts￿are￿connected￿in￿the￿outputs￿of￿the￿differential.￿The￿torque￿is￿transmitted￿by￿the
positive￿connection￿(gearing)￿between￿the￿output￿shafts￿and￿the￿differential.￿A￿radial￿shaft￿seal,￿as
known￿from￿conventional￿BMW￿vehicles,￿seals￿the￿oil￿chamber￿of￿the￿transmission.
Covers
The￿graphics￿in￿this￿document￿show￿the￿electrical￿machine￿and￿the￿transmission￿without￿its￿covers.￿In
the￿vehicle￿sometimes￿these￿components￿are￿still￿covered￿by￿a￿foam￿part.￿This￿serves￿for￿the￿acoustic
encapsulation￿of￿the￿electric￿motor￿and￿absorbs￿noises.
3.2.4.￿Parking￿lock
Introduction
The￿parking￿lock￿is￿responsible￿for￿securing￿the￿vehicle￿against￿rolling￿away,￿just￿like￿in￿a￿conventional
vehicle￿with￿automatic￿transmission.￿Even￿on￿steep￿inclines/downhill￿gradients￿up￿to￿32%￿the￿parking
lock￿is￿able￿to￿safely￿hold￿the￿I01￿at￿a￿standstill.￿Nevertheless,￿just￿like￿for￿conventional￿vehicles￿it￿is
recommended￿to￿also￿secure￿the￿vehicle￿against￿rolling￿away￿using￿the￿parking￿brake.
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Explanation
Output￿shaft,￿left
Transmission￿input￿shaft￿with￿gearing
O-ring￿seal
Bore￿holes￿for￿the￿mechanical￿connection￿with￿the￿electrical￿machine