Redundant Brake System for Highly Automated Driving (MK C1 HAD)

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1 Redundant Brake System for Highly Automated Driving (MK C1 HAD)

2 Conventional Brake System Components Tubes Electrical Vacuum Pump (EVP) Electronic Stability Control (ESC) Brackets Vacuum booster Tandem master cylinder Reservoir

3 Key points MK C1 Physical architecture By wire brake system with hydraulic fallback mode Brake boost and pressure modulation in a 1-Box-Design Brake pedal interface Electric brushless motor Pedal feel simulator Reservoir incl. brake fluid level switch Electric control unit incl. sensors Hydraulic control unit incl. control valves

4 MK C1 Advantages 30% reduced system weight, packaging space and mounting effort No vacuum for braking required 100% recuperation of braking energy, thanks to the brake-by-wire design Reduced can build up braking pressure in 150 ms (time-to-lock), which is twice as fast as conventional systems today Pressure built up performance driver independent due to brake-by-wire design Autonomous Emergency Braking CO 2 Reduction Assisted driving

5 MK C1 New requirements for Highly-Automated Driving (HAD) The human driver might not be immediately available as backup for all autopilot systems In case of unavailability of any of the HAD subsystems, a backup system has to take over For HAD an extension of the brake system is needed: MK 100 Hydraulic Brake Extension (HBE) MK C1 HAD MK C1 MK 100 HBE Automated driving

6 MK C1 for Highly-Automated Driving (MK C1 HAD) Concept & features Concept MK C1 HAD ensures the required deceleration level at all times, without driver interaction The MK C1 as base component is identical within HAD & non HAD vehicles, this limits the application effort to a minimum Technical features Fail operation Autopilot brake function with possible maximum deceleration up to 0,9 g for the full speed range Wheel slip control function (ABS & Electronic Brake Distribution) in fallback to prevent overbraking and destabilization Continuous self-testing provides highest fallback availability

7 MK C1 for Highly-Automated Driving (MK C1 HAD) NBrake & ABrake function: Chain of effects Normal driving Nbrake Automated driving Abrake Driver Brake pedal Pedal act. unit (TMC+SIM) m m TMC Travel Sensor bar s U p U TMC Pressure Sensor NBrake & Brake request Determination Software Autopilot Brake Request Determination Brake request arbitration M Linear Actuator (LAC) Pressure distribution + Valves Fallback mode Autopilot MK 100 HBE Wheel brakes

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9 New Continental Air Supply Module (CAirS) for Electronic Air Suspension System

10 Air Suspension Systems Advantages Comfort ride for BEV s with high battery weights CO2 reduction by lowering higher speedd E-Mobility* (* Source: skodavisione.com) Switchable volumes: adjustable stiffness comfort/sportive vehicle behavior Easy entry, easy loading Off road capability CO2 Reduction Assisted driving

11 Air Suspension Systems Requirements for E-Mobility High battery weights requires stiffer steel springs air suspension works independent from load conditions Every kilogram counts: light weight designs in chassis is a must have Height adjustment for inductive loading possible Battery protection E-Mobility* (* Source: skodavisione.com)

12 Conventional Air Supply System Components Several connectors Brackets, mounts Air lines Solenoid valve block Temperature sensor Compressor Electronic Control Unit

13 Key points CAirS Physical Architecture Housing with coils Air dryer Lower installation effort Reduction of compressor running time which leads to 70% less energy consumption compared to an open loop system High system availability and leveling speed are core elements of the CAirS module Integrated motor switch. Option: Inrush current limitation, speed control Electric control unit incl. sensors and EuCon connector Electric motor Housing with integrated compressor, valves, pneumatic connectors

14 New Electronic Air Suspension Approach Continental Air Supply (CAirS) Before: Benefits vs. New Electronic Air Suspension Approach: Highly integrated More functions Greater comfort -25% Weight Small size NVH reduction CAirS closed loop air supply concept. Its small size reduces weight and decreases vehicle energy consumption. CAirS recognized as 2018 honoree in the Eco-Design and sustainable technologies product category. At the Consumer Electronic Show (CES) in Las Vegas!

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