Bosch (Germany) has launched the ESP-9 (electronic stability program) system for premium cars. It provides more safety, assistance, and comfort functions. The CAN-based system has been reduced in size and weight. It supports in particular predictive emergency braking and adaptive cruise control with stop-and-go function.
BOSCH HAS ENHANCED ITS NINTH GENERATION OF BRAKE CONTROL SYSTEMS. Gerhard Steiger, the president of the Bosch Chassis Systems Control division, summarzied: “The ESP-9 premium is the ideal basis for high-performance assistance and safety systems.” The core of this version is an especially efficient return pump that can build up brake pressure very fast, and almost without any vibration.
While current brake control systems work with two pump elements, a total of six pistons are integrated into the ESP-9 premium. They build up brake pressure especially fast, as well as very evenly, regardless of whether high or low brake pressure is required. On the one hand, this means that the brake control system can brake hard in an instant, and thus defuse critical situations. On the other hand, it can also provide the kind of gentle intervention needed for automatic dry braking or for an adaptive cruise control system with stop-and-go function. This pressure build-up is assisted by two additional pressure sensors integrated in the hydraulic modulator. Moreover, the smooth operation of the pump means that less vibration is transmitted to the bodywork, practically ruling out irksome noises and vibrations on the brake pedal.
Bosch was the world’s first company to produce a electronic stability controller, and since then has improved it several times. When designing the now introduced brake control systems, the German car supplier placed special importance on a high level of flexibility. This is why much of the hardware and software is modular in construction. While the ESP-9 base system provides full protection in critical situations, the ESP-9 plus system already allows a number of common assistance functions to be executed, from hill hold control to adaptive cruise control (ACC) with a stop-and-go function. And with the ESP-9 premium system, also other sophisticated driver assistance systems are supported. These include the lane keeping assistant, emergency braking assistant, and smart cruise control, as well as torque vectoring, a vehicle dynamics control function in which torque is distributed individually to each wheel. All these and many other functions can be configured as desired. Automakers can decide these questions for themselves, and in this way create the character they want for their brand or individual model.
Despite all these additional functions, the system is smaller and 800 g lighter than its predecessor. This supports automakers’ efforts to reduce the overall weight. The system is highly integrated into the in-vehicle networks. CAN communication is one of the most important networks for ESP systems.
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