Sensotronic Brake Control From Wikipedia, the free encyclopedia This article needs additional citations for verification . Please help improve this article by adding citations to reliable sources. sources. Unsourced material may be challenged and when to remove remove this template template message ) removed. (June 2009) ( Learn how and when Sensotronic Brake Control (S!" is an electro-hydraulic brake system developed by #aimler and osch osch.. The S! system $as introduced on the %&' S)*class, S)*class, $hich $ent on sale in +urope -/ in ctober &-.
Contents •
- 0o$ it $orks
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& 1dvantages and disadvantages
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' 2ndustry recognition
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3 Problems
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4 Sensotronic rake !ontrol applications
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5 ther production electro*hydraulic brake systems
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6 %eferences
How it works 2n a hydraulic brake system, the driver applies ap plies force by a mechanical link from the pedal to the master brake cylinder. 2n turn the master brake cylinder develops hydraulic pressure in the $heels. 2n contrast, the electro*hydraulic brake S! provides the brakes $ith a brake fluid supply from the hydraulic h ydraulic high*pressure reservoir, $hich is sufficient for several braking events. 1 piston piston pump driven by b y an electric motor supplies a controlled brake fluid pressure bet$een -3 and -5 ar in in the gas diaphragm reservoir. When the driver presses the brake pedal * or $hen +SP intervenes to stabili7e the vehicle * the S! control unit calculates the desired target brake pressures on each individual $heel. Through the use of independent pressure modulators the system regulates the hydraulic pressure at each $heel. These four pressure modulators consist of one inlet and one outlet valve, controlled by electronic output stages.
The system employs a travel sensor and a pressure sensor at the pedal to measure the speed and force of the driver8s command. The control unit processes this information and g enerates the control signals for the $heel pressure modulators. 9ormally, the master brake cylinder is detached from the brake circuit. 1 pedal travel simulator creates normal pedal feedback. 2f +SP intervenes, the high*pressure reservoir supplies the re:uired brake pressure :uickly and precisely to selected $heels, $ithout any driver involvement.
Advantages and disadvantages With fine*grained control of pressure at each $heel, S! offers a uni:ue platform in $hich to implement skid protection and traction control compared to cf. 1nti*lock braking system (1S" and +lectronic Stability !ontrol (+S!", respectively. ;oreover, the system offers innovative functions to reduce the driver8s $orkload. These include Traffic
Industry recognition 2n &- the =*!lub, an association of international e>perts in the field of brake techno logy, honored %obert osch ?mb0 and #aimler!hrysler 1? for the development of the electrohydraulic brake S!. 0o$ever, sensotronic brake system (&-" is basically a copy of brake by $ire system develloped in Prius(-@@6" by Toyota motor !ompany. 1ll the parts and system diagram are almost identical in both systems.
Problems 2n ;ay &3, ;ercedes recalled 5A, vehicles e:uipped $ith the systemB in ;arch &4 a total of -.' million vehicles $ere recalled. 2n & 5 high*volume models such as the +*class returned to conventional hydraulic brake systems. )o$*volume lu>ury models such as the S), the ;aybach and the S)% continued to use S! due to the prohibitive cost of redesign.'/ Setup of SBC in a Car
Follo$ing on from the ;ercedes innovations 1S, 1S%, +SPC and rake 1ssist, this system is regarded as yet another important milestone to enhance driving safety. With Sensotronic rake !ontrol electric impulses are used to pass the driverDs braking commands onto a microcomputer $hich processes various sensor signals simultaneously and, depending on the particular driving situation, calculates the optimum brake pressure for each $heel. 1s a result, S! offers even greater active safety than conventional brake systems $hen braking in a corner or on a slippery surface. 1 high*pressure reservoir and electronically controllable v alves ensure that ma>imum
brake pressure is available much sooner. ;oreover, the system offers innovative additional functions to reduce the driverDs $orkload. These include Traffic
Sensotronic Brake Control applications •
&'*&5 +*!lass
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S)%
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;aybach
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&'*&5 !)S*!lass
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&-*&-- S)*!lass
Other production electrohydraulic brake systems •
Toyota Prius (2ntroduced in -@@6B uses an ehb system from 1dvics"
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Toyota +stima 0ybrid (2ntroduced in &- in
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Ford +scape 0ybrid (2ntroduced in &'"
