Introduction - BMW G12 Product Information

G12￿Driver￿Assistance￿Systems
19.￿Cruise￿Control
19.1.￿Introduction
Two￿cruise￿control￿functions￿can￿be￿used￿in￿the￿G12.￿The￿cruise￿control￿with￿braking￿function￿(DCC)
is￿part￿of￿the￿basic￿equipment.
The￿customer￿also￿has￿the￿option￿of￿ordering￿the￿Active￿Cruise￿Control￿with￿Stop&Go￿function
(ACC Stop&Go)￿optional￿equipment￿(OE ZN7)￿part￿of￿ZDT￿Driver￿Assistance￿Plus￿II.
ACC Stop&Go￿can￿also￿be￿obtained￿if￿the￿customer￿opts￿for￿the￿Active￿Driving￿Assistant￿Plus￿optional
equipment￿(OE 5AT),￿as￿it￿is￿contained￿in￿this￿equipment￿package.
Other￿features￿of￿the￿Active￿Driving￿Assistant￿Plus￿optional￿equipment￿(OE￿5AT)￿are￿the￿steering￿and
lane￿control￿assistant￿and￿the￿traffic￿jam￿assistant.￿When￿used￿in￿conjunction￿with￿the￿steering￿and
lane￿control￿assistant￿and￿the￿traffic￿jam￿assistant,￿ACC￿Stop￿&￿Go￿provides￿optimum￿support￿for￿the
driver.
The￿cruise￿control￿systems￿support￿the￿driver￿with￿adapting￿the￿speed,￿distance￿and￿driving￿style￿to
the￿traffic￿conditions,￿but￿do￿not￿relieve￿him￿of￿his￿responsibility.￿The￿driver￿must￿actively￿intervene,
e.g.￿by￿braking,￿steering￿or￿taking￿evasive￿action,￿as￿otherwise￿there￿is￿a￿risk￿of￿an￿accident.
19.2.￿Cruise￿control￿with￿braking￿function
The￿cruise￿control￿with￿braking￿function￿is￿included￿as￿part￿of￿the￿G12's￿basic￿equipment.￿The￿system
is￿also￿Known￿as￿"Dynamic￿Cruise￿Control"￿(DCC).￿Dynamic￿Cruise￿Control￿(DCC)￿supports￿the￿driver
on￿roads￿with￿less￿traffic￿by￿keeping￿the￿speed￿constant￿irrespective￿of￿rolling￿resistances￿(incline,
downhill￿driving￿and￿vehicle￿load).￿In￿spite￿of￿the￿support,￿the￿driver￿remains￿responsible￿for￿control
of￿the￿vehicle.￿It￿is￿possible￿to￿override￿the￿DCC￿function￿at￿any￿time￿by￿braking￿or￿accelerating￿the
vehicle.
19.2.1.￿Control￿functions
Cruise￿control
The￿cruise￿control￿calculates￿a￿target￿acceleration￿or￿deceleration￿based￿on￿the￿speed￿set￿by￿the￿driver
and￿the￿actual￿speed.
Acceleration￿and￿deceleration
The￿driver￿can￿specify￿the￿set￿speed￿or￿acceleration￿via￿the￿rocker￿switch￿on￿the￿multifunction￿steering
wheel￿(MFL).
Cruise￿control￿on￿bends
Another￿purpose￿of￿this￿function,￿also￿referred￿to￿as￿the￿"lateral￿acceleration￿controller",￿is￿to￿prevent
the￿lateral￿acceleration￿from￿increasing￿above￿an￿acceptable￿level￿when￿cornering￿with￿the￿cruise
control￿switched￿on.￿A￿lateral￿acceleration￿is￿calculated￿from￿the￿driving￿speed￿and￿yaw￿rate.￿This￿value
is￿compared￿with￿a￿speed-dependent￿limit￿in￿order￿to￿achieve￿the￿following￿seemingly￿contradictory
objectives:
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