New System Description

New System Description
The optional Sequential Manual Gearbox (SMG) is an automated manual gearbox with which clutching and shifting is assumed by an electrohydraulic system. The SMG is operated via two shift paddles on the steering wheel and the selector lever in the center console. It offers the following functions:
^ Sequential shifting mode and automated Drive mode
^ Ability to choose between two different driving programs: Standard, Sport
^ Operating safety through protection against mix shifting
^ Automatic upshifts in the Drive mode
^ Automatic downshifts at minimum engine rem
^ Kickdown function in the Drive mode
^ Acceleration assistant
There are two sequential manual gearboxes (SMG) that are used for the E60:
^ HSMG (GS6S37BZ) for the M54B25, M54B30 engine
^ GSMG (GS6S53BZ) for the N62B44 engine
The 6speed manual gearboxes GS637BZ, GS6S53BZ are the foundations for the SMGs in the E60. The GSMG differs from the HSMG. It uses a more powerful clutch actuator, different shaped hydraulic tank and the GS6S53BZ gearbox.
In combination with this option, the customer also obtains the Driving Dynamics Control function (FDC). This function provides a Sport effect on driving by influencing the Engine Management, transmission (SMG) and steering control systems. This function is activated with the SPORT button.
The SMG gearboxes are already known from the E46 and (E85) Z4 model series. For additional detailed information on the SMG gearbox, refer to the ST045 (E85) Z4 Complete Vehicle Technical Training Handout. Only the new features of the system are described in the following module.