Chassis Systems Control Solutions for increased safety, comfort and agility 2 | Chassis Systems Control Innovations from Bosch have shaped the automobile as we know it today and will continue to do so in the future – a future in which sustainable and low-emission mobility is more important than ever. Although the combustion engine is likely to continue to dominate the industry for many years to come, alternative technologies, such as hybrid and electric drives, are gaining in importance. Regardless what technology powers the vehicles of the future, it must ensure a safe, relaxed and comfortable driving experience. This is another major area of innovation for Bosch. In line with the slogan “Invented for life”, Bosch will continue to supply systems that make personal mobility safer, cleaner and more economical. | 3 Content Page Section 4 Safe and comfortable driving 6 Active safety systems 12 Passive safety systems 18 Driver assistance systems 30 Perspectives of connected mobility 4 | Chassis Systems Control Our contribution toward greater safety and comfort in road traffic Our products have been helping to reduce accidents and the risk of injury for many decades. However, we want to take the already high safety standards to the next level, which is why we are focu sing our efforts on the development and intelligent networking of safety and assistance systems. | 5 We aim to implement new functions If we are to reduce the number of analyze international traffic and acci- to reduce the number of accidents, accidents by a significant amount, dent data to help us calculate the improve the protection available to available safety systems need to be benefits of new functions before they vehicle occupants, pedestrians and included in as many vehicle classes are incorporated in vehicles. By other road users, increase comfort, as possible. We not only support tech- carefully evaluating this information, and improve driving dynamics. Our nological innovation, but also the it is possible to reconstruct the technology will be utilized to reduce development of safety systems that cause and sequence of an accident. the severity of accidents in the mid- can be made available to every one. This means that new systems can term. Our long-term objective is to see We are continually enhancing systems be developed or existing systems the implementation of technology that have already proven successful. optimized to combat potential acci­­- that reduces accidents caused by Take ESP®, for example, which now dent risks, thus considerably improv- driver error. costs just 25 percent of a first-gener- ing road safety. ation system. Thanks to technical in- novations, our components and sys- Assistance systems, which aid the tems are also becoming smaller and driver, and safety systems, which lighter, while at the same time more help to prevent accidents or lessen powerful. As a result, we are also help- the severity of accidents in critical ing to reduce the weight of vehicles situations, can significantly reduce and therefore lower fuel consumption the number of injuries and fatalities and vehicle emissions. as a result of road traffic accidents, consequently reducing the financial Bosch accident research for burden. It is our aim to develop cost- increased safety effective solutions for the functions An important starting point for the with the greatest expected benefit development of safety systems and and to put them into mass produc- functions at Bosch is our central tion. accident research center. Here, we 6 | Chassis Systems Control | Active safety systems Active safety systems help to prevent accidents Active safety systems contribute toward road safety by providing safe, quick and reliable braking actions. As soon as a critical driving condi- tion is detected using data sent by sensors, the active safety systems pinpoint the vehicle dynamics to guide them and restore the stability of the vehicle. Active safety systems | 7 Active safety systems: Brake booster Master cylinder iBooster Antilock braking system Traction control system Electronic stability program* * Electronic stability program (ESP®) is also known as electronic stability control (ESC) 8 | Chassis Systems Control | Active safety systems Active safety systems enable safe and reliable braking The braking system is one of the most important pieces of safety equipment in a vehicle. The components in the braking system convert the brake force applied by the driver into the required braking effect in an optimal way, ensuring the vehicle is decele r- ated safely and comfortably. Active safety systems | 9 Regenerative braking systems increase the range of electric vehicles and lower the con- sumption of hybrid vehicles. Bosch offers products that generate Brake boosters: less effort for brake fluid into the braking circuits and distribute brake pressure, includ- a more comfortable pedal feel and controlling this process. The ing brake boosters and master cylin- Vacuum brake boosters amplify the latest generation of Bosch master ders. What’s more, we are also one of power exerted by the driver’s foot cylinders is approximately 30 % Europe’s largest suppliers of brake when depressing the brake. Amplify- shorter and around 20 % lighter than disks. ing this power reduces the amount conventional master cylinders. of force that needs to be applied by These reductions mean that the To make cars more environmentally the driver. Bosch offers scalable master cylinder not only saves friendly and efficient, we are working solutions for brake boosters in single on space, but also helps save fuel on new braking concepts for current and tandem designs. These solutions thanks to its low weight. and future drive systems. For hybrid not only cover requirements demand- and electric vehicles, we are devel- ed by braking performance and the iBooster: dynamics and safety – oping regenerative braking systems that space available in the vehicle – they not just the domain of electric and take the energy generated during also deliver a pedal feel that can be hybrid vehicles braking and reuse the stored energy adapted to be in tune with the vehi- In contrast to conventional combus- to its maximum possible effect. By cle’s characteristics, thus enhancing tion engines, electric motors do not using alternative materials, we can the comfort. produce a vacuum; however, one is reduce the weight of the brake sys - needed for a vacuum brake booster. tem and brake disks, thereby enhanc- In vehicles equipped with antilock The electromechanical iBooster ing the driving dynamics and cutting braking systems, the mechanical works independently from external CO2 emissions. brake assist supports drivers when vacuum generators and is therefore they need to apply the full brakes, ideal for electric and hybrid vehicles. suddenly. The iBooster offers great pressure build-up dynamics, a high degree of Master cylinders: saving space and pressure control accuracy and is enhancing safety extremely quiet. When combined with Master cylinders convert the pressure driver assistance systems, the applied by the driver’s foot and iBooster is the solution to meet the amplified by the brake booster into demands required for braking hydraulic pressure. The cylinder dynamics, safety and comfort. converts this pressure by feeding 10 | Chassis Systems Control | Active safety systems Active safety systems stabilize the vehicle in critical situations Bosch’s market launch of the antilock braking system (ABS) for cars in 1978 represented a milestone in the development of active safety systems. The technology was groundbreaking and paved the way for all modern brake control systems. The function of ABS has been enhanced over the years: in 1986 the traction control system (TCS) was added and in 1995 the electronic stability pro- gram (ESP®). Once again, these systems were innovations from Bosch. Bosch has been producing antilock braking systems for motor- cycles since 1995. The launch of motorcycle stability control (MSC) in 2013 marked an important milestone on the road to improve driving safety for two-wheelers. For the first time, this brake control system is able to provide the best possible stability in all driving situations. MSC supports the rider during braking and acceler- ating, while driving in a straight line, and while riding in a curve. Active safety systems | 11 The electronic stability program from Bosch counter- acts skidding. Antilock braking system (ABS): Traction control system (TCS): Value-added functions expand the braking without wheel lockup acceleration without wheel spinning potential of ESP® In critical driving situations, such The traction control system extends ESP® also features value-added func- as on wet or slippery surfaces, the the ABS functions. When setting off tions that further increase driving wheels may lock during braking. and accelerating, TCS prevents the safety and comfort. These include, for The vehicle can no longer be steered drive wheels from spinning by acting example, hill hold control, which and can become unstable. ABS on the engine and, if necessary, by makes it easier to start on an incline, detects the tendency of one or more braking the spinning wheel. In this or load adaptive control, which wheels to lock at an early stage way, the system enables optimum ac- adapts the ESP® interventions and and adjusts the brake pressure ac- celeration, even in adverse driving the ABS and TCS function to the cordingly. This enables the driver conditions, such as slippery or wet vehicle load in light commercial