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1、MINI ServiceAftersales Training - Product Information. Electromechanical power steering R56.The information contained in the Product Information and the Workbook form an integral part of the training literature of Aftersales Training.Refer to the latest relevant MINI Service Information for any chan
2、ges/supplements to the Technical Data.Information status: August 2006Contact: conceptinfobmw.de 2006 BMW AG Mnchen, Germany Reprints of this publication or its parts require the written approval of BMW AG, Mnchen. VS-12 Aftersales TrainingProduct Information. ElectromechanicalPowerSteering R56.Speed
3、-dependent steering torque assistanceBeneficial for the environment as the system has no hydraulic circuitNotes on this Product InformationSymbols usedThe following symbols are used in this Product Information to facilitate better comprehension and to draw attention to important information.3contain
4、s information to facilitate better understanding of the described systems and their function.1 identifies the end of a note.Information status and national variantsMINI vehicles conform to the highest safety and quality standards. Changes in terms of environmental protection, customer benefits and d
5、esign render necessary continuous development of systems and components. Consequently, this may result in deviations between this Product Information and the vehicles available in the training course.This document relates exclusively to left-hand drive vehicles with European specifications. Some con
6、trols or components are in part arranged differently in right-hand drive vehicles than shown on the graphics in the Product Information. Further differences may arise as the result of the equipment variants used in specific markets or countries.Additional sources of informationFurther information on
7、 the individual subjects can be found in the following:- Owner s Handbook- MINI diagnostic system- Workshop systems documentation- SBT BMW Service Technology.Contents. Electromechanical Power Steering R56.Objectives1 Reference for practical applications1Introduction3 History and features3System over
8、view5 Design5 Overview of bus system6 Schematic circuit diagram7 Input/Output9 Functions11System components15 EPS Components in detail15 Interconnection of EPS components18 Service procedures19 Service information21Summary23 Points to remember23Test questions25 Questions25 Answers to questions2612Ob
9、jectives. Electromechanical Power Steering R56.Reference for practical applicationsGeneralThis Product Information serves as the theoretical basis for the training course.It provides information on the design and operationofthenewelectromechanicalpower steering used in the MINI R56.This Product Info
10、rmation is designed as reference material and complements the seminar material prepared by MINI Aftersales Training. The Product Information is a useful self-study tool.In connection with practical exercises conducted as part of the training course, it should enable the participant to perform servic
11、e jobs on the electromechanical power steering in the MINI R56.Theoretical and practical knowledge of the MINI models R50/R52/R53 will facilitate understanding of the subject matter presented in this Product Information.Basic knowledge ensures competence in theory and practical applications.2233Intr
12、oduction. Electromechanical Power Steering R56.History and featuresImplementationThe new electromechanical power steering (EPS) fitted on the R56 replaces the electrohydraulic power steering (EHPS) used on the R50, R52 and R53.EPS is used for the first time in the R56 MINI COOPER and MINI COOPER S.
13、The R56 MINI ONE, which will be launched at alaterdate,willalsobeequippedwiththisnew power steering system. There will be a specific EPS system for LHD and RHD versions.Similar electromechanical power steering systems are also used in the BMW Z4 (E85) andBMW3Series(E9x).Byextendingtheuse of this sys
14、tem in a further model, i.e. the R56, the BMW Group is one step closer to using these innovative steering systems throughout its range.MotivationThe use of the electromechanical power steering system provides many advantages for the MINI customer, the environment and the BMW Group as the vehicle man
15、ufacturer.Interactingwiththewell-provenaxleconcepts, a unique combination of driving comfort and dynamics is realized. The steering properties (e.g. the level of steering torque assistance and damping) can be finely tuned by correspondingly programming the electrical system while ensuring optimum ad
16、aptation to the different vehicle philosophies. In the R56, the EPS is set up such that it is very direct and sports-orientated. In addition, an optional driving dynamics control button (SPORT button) makes it possible to switch between standard mode and sports mode. Standard mode is designed for the normal customer and is characterized by the way it resolvestheconflictofobjectivesbetweenlow parkingforcesandspeed-dependentsteeringforces. Sports mode gives the customer the opportunity of ado
