In April 2010, Bosch produced its 50 millionth DV-E electric throttle device at its Nuremberg plant. The unit regulates the air supply in the gasoline engine’s intake tract. It consists of a throttle device with an electric drive and an angle sensor. On the basis of the accelerator position, the engine control unit calculates the required opening of the throttle valve, the ignition angle, and the injection amount. A DC motor adjusts the throttle-valve shaft via a gearing unit, and in this way meters the air volume. By precisely metering air volume, the DV-E controls the torque level delivered by the engine, and thus engine power. At the same time, it also plays a role in air-fuel mixture preparation for economical and low-CO2 combustion.

Condition for safety and driver assistance systems
The DV-E also creates the condition for safety and driver assistance systems that require a reduction or increase in engine power in specific driving situations, such as traction control, ESP®, or ACC adaptive cruise control. The throttle can be used to reduce engine power, for example, so that the traction control system can prevent the wheels from spinning, or to increase or reduce engine power so that ACC can keep the vehicle at a constant distance from the vehicle ahead. The Bosch DV-E is one of the lightest aluminium throttle devices on the market, and no other device takes up less space. Its low power consumption is also particularly impressive. Available in diameters between 32 and 82 millimetres, it can be used in almost all engine and displacement classes. In diesel engines, the electrically regulated control valve (RKL-E) is a similar device, controlling both the air supply and exhaust-gas recirculation.

This component’s history began in 1986 with production of the DV-E1 in the Bosch plant in Bühl, Germany. Then, in 1989, the DV-E3 for 12-cylinder Mercedes-Benz models was produced at the Nuremberg plant. As calls for reduced fuel consumption and CO2 emissions became louder, demand for these Bosch components also increased. Following start of production in 1997, the DV-E5 reached annual production figures of more than 3.5 million units. The RKL-E for diesel engines went into series production in 2003. Production of this component was also given a massive boost by the trend toward high-torque and economical diesel engines.

Global production
To this day, more DV-E5 devices have been made than any other throttle device. It is manufactured at five Bosch sites worldwide. The international manufacturing network includes sites in the U.S., Brazil, China, South Korea, and Germany. After the first applications in Mercedes-Benz, Volkswagen, Audi, and Fiat vehicles, nearly all carmakers around the world now use Bosch throttle devices.

Robert Bosch GmbH – Automotive Equipment

Bosch predictive emergency braking system goes into series production

· Environment recognition with radar and video sensors

· Of all the accidents involving injury and fatalities in Germany, 15 percent are rear-end collisions

The Bosch automatic emergency braking system is going into series production for the first time. It provides effective support for drivers in critical situations in which there is the threat of a rear-end collision. “Roughly 80 percent of drivers do not hit the brakes at all before a rear-end collision, or do not use the car’s full braking capacity,” says Dr. Werner Struth, president of the Bosch Chassis Systems Control division, summarizing an analysis of GIDAS, the German accident database. The Bosch system helps drivers to react properly. The technical basis of this system is the ESP® electronic stability program and the LRR3 long-range radar sensors of the ACC adaptive cruise control system, which are complemented by a video sensor. The functions now feature for the first time in the new Audi A8, as part of the “pre-sense” package.

Sensor data fusion for the best possible recognition of the traffic situation
Of all the accidents involving injury and fatalities in Germany, 15 percent are rear-end collisions. Predictive systems that interpret the state of the traffic ahead of the vehicle, warn drivers, support them, and finally react automatically can help to significantly reduce the number of such accidents. The earlier and the more precisely the situation in front of the vehicle can be interpreted, the better the driver assistance functions can help the driver. Bosch engineers have thus made an interplay of radar and video data possible, for optimum recognition of traffic situations. Apart from the high-performance Bosch ESP®premium brake control system, the Audi A8 features two long-range radar sensors, which are housed at the left and right of the front bumper. These new Bosch generation 3 sensors can detect objects within a beam width of approximately 40 degrees at a distance of up to 250 meters, and can determine their position and speed. The video camera is positioned behind the front windshield, at the same height as the rear-view mirror. The advantage of video technology is the high level of information content, which makes persons, vehicles, or traffic signs easy to identify. Another benefit is the technology’s ability to set off one image against another, as well as the angle detection of objects. The radar signals, for their part, deliver precise data as to the position and speed of the persons, vehicles, or traffic signs featured in the video images.

Warn, support, intervene
In a first step, if the predictive emergency braking system detects a potential obstacle, such as a vehicle that is slowing down very fast or coming to a standstill, the brake is primed for the emergency braking that may follow. This involves the brake control system imperceptibly building up slight pressure, which brings the brake pads up close to the discs, so that they can provide immediate deceleration in the event of a subsequent braking operation. If the driver does not react, and the vehicle comes closer, an acoustic warning is given, followed by automatic partial braking, initiated via a brief jerk on the brakes. If the driver still does not react, and if a collision can no longer be prevented, the system brakes automatically at maximum pressure roughly half a second before impact, in order to reduce speed of impact and mitigate the consequences of the accident.

The ACC function has also been extended. With the help of the video data for example, the system reacts more quickly when overtaking other vehicles and when other cars veer into the lane ahead. Moreover, in the new Audi, the signals from the Bosch video camera are used for the automatic headlight control and for the lane departure warning system. Additional functions in the ESP® provide further comfort and safety features. The hill-hold control, for example, can prevent the vehicle from rolling backwards on an incline. When towing, ESP® detects whether a trailer is weaving dangerously, and helps the driver to counteract.

Many other systems and components in the new A8 are also made by Bosch: there is the instrument cluster with its large color display, the control unit and sensors for the passenger restraint system, a domain control unit, the starter, and the wiper drive. For the gasoline engines of the new A8, Bosch supplies various engine control units, and the two initially available diesel engines use Bosch injection systems with piezo valves and injection pressure of up to 2,000 bar.

Robert Bosch GmbH – Automotive Equipment

Interesting, I wonder if car manufacturers will stop charging silly money for satnavs now?

Tom

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Google has brought its free turn-by-turn software to the UK.

The update to Google Maps is being made available today as a free download for any smartphone running Android 1.6 or above. Google confirmed at a London press conference that it plans to bring the free satnav to other smartphone platforms, including the iPhone, although it wouldn’t confirm when.

Unlike rivals such as TomTom or CoPilot’s smartphone software, Google’s satnav software doesn’t store maps on the device but downloads them on-demand from the cloud. That means users will need to have an active data connection when planning routes.

“Google Maps pre-caches the entire route,” said Mobile Maps product manager, Steve Lee. “It needs a data connection when you ask for navigation. But while driving to your destination, if you intermittently lose the connection, it will still carry on. As long as you stay on the route.”

The service has been localised for the UK: distances are stated in miles instead of kilometers, and the audio instructions are delivered in an English accent.

The Google satnav also benefits from voice recognition, with the software able to understand plain English commands such as “drive to 12 London Road” or “find nearest Starbucks”. Lee demonstrated advanced voice recognition commands such as “navigate to museum with Rosetta Stone”, which brought up a listing for the British Museum in the search results.

The satnav is available in several different views, including maps, satellite and Google Street View photography. Users can opt to see a Street View photo of the next junction, and a Street View image automatically appears when you near your destination so drivers can see exactly what their location looks like.

Google offers live traffic data, although the software isn’t yet capable of dynamically diverting drivers around traffic jams – a staple feature of dedicated satnav devices. However, Google’s software will automatically plot alternative routes on request, which estimates traffic-adjusted journey times.

Dedicated car docks will be available for handsets such as the Google Nexus One and HTC Desire.

Squashing the competition?

The launch of Google’s satnav will doubtless be a blow to commercial providers such as TomTom and Garmin. However, Google claims the satnav makers had become complacent.

“Google prides itself on innovating in markets that have been stagnant for a while,” said Hugo Barra, director of mobile products at Google. “I think navigation is a good example. We think there will be a lot more [innovation] happening as a result [of Google’s launch]. It will be good for users.”

Google said it will also bring the free satnav to rival smartphone platforms. “We’re absolutely evaluating other platforms,” said Lee. “Maps for Mobile has the most breadth [of any Google service]. It runs on Symbian, Windows Mobile, BlackBerry and Android. For navigation, it requires a lot more [hardware] capability.

We use OpenGL for some of the graphics. We started off with Android, because it has those capabilities, but we absolutely want to bring it to other platforms.”

Google brings free turn-by-turn satnav to UK | News | PC Pro

 Bosch Common Rail Systems
Lower fuel consumption – lower emissions
Robust and powerful

· CRS2-18-OHW tailored to the specific requirements of the off-highway segment

· CRSN3.3 for on- and off-highway applications

· Cost-effective high-pressure pumps with up to 1,800-bar injection pressure

Bosch diesel-injection systems deliver low pollutant emissions and reduced fuel consumption for commercial vehicles. At the same time, Bosch is designing and manufacturing powerful, robust Common Rail Systems for the specific requirements of the off-highway segment – in other words, for agricultural and construction machines as well as industrial applications.

Based on the series-production Common Rail Systems CRS2-11-OHW with 1,100 bar and CRS2-16-OHW with 1,600 bar, Bosch is currently developing the Common Rail System CRS2-18-OHW with a system pressure of up to 1,800 bar. The system operates with a new injector featuring a pressure-balanced solenoid valve and an additional rail volume built into the injector. Compared with the previous generations, the customer benefits from lower fuel consumption with a similar reduction in CO2 emissions. As the injection pressure increases within any one emission class, the effort involved in exhaust-gas treatment is reduced. The system thus helps meet future emissions limits. By tailoring the product to off-highway operation, Bosch has managed to factor in specific requirements, such as service life, fuel compatibility and the harsh operating conditions. Thanks to its modular design, the solution can be integrated easily into existing and new engine series. The product is aimed at agricultural and construction machines as well as industrial applications which develop up to 130 kilowatts with 4-cylinder engines and a maximum 200-kilowatt power output with 6-cylinder models. However, it can also be used as a cost-effective solution in light and heavy-duty commercial vehicles. The CRS2-18-OHW series will go into series production in mid-2012.

CRSN3.3 with 2,000 to 2,500-bar system pressure
The Common Rail System CRSN3.3 has been designed for the off-highway and commercial-vehicle segments. The solution is aimed specifically at engines with between four and 16 cylinders, developing between 200 and 560 kilowatts. Based on the current 1800-bar injector, Bosch has meantime configured the CRSN3.3 for injection pressures between 2,000 and 2,500 bar. The CP4 high-pressure pump, which has been derived from passenger-car applications, is used to build up the pressure and operates in tandem with high-pressure pumps from the CPN5 family. Despite the higher system pressure, the high-pressure pumps require the same or even lower drive power, thus increasing system efficiency. Thanks to the high injection pressures, CRSN3.3 will in future also meet the Tier 4 emissions standard, which is set to become the benchmark in the off-highway segment. The customer will also benefit from a reduction in fuel consumption and CO2 emissions. Both figures can be reduced even further by combining the technology with SCR exhaust-gas treatment.

Cost-effective high-pressure pumps for Common Rail Systems
In light of future emissions standards, automakers and engine manufacturers are currently switching many engines from the in-line pump design to Common Rail Systems, particularly in emerging markets such as China and India. In response, Bosch has developed the CB high-pressure pumps, which can be fitted to existing units as well as new engines without any major modifications. At the same time, the development of these pumps took particular account of the frequent problem of inconsistent fuel quality in these regions. The cost-effective CB family includes the oil-lubricated high-pressure pumps CB08, CB18 and CB28. The CB08 can be used in Common Rail Systems with up to 1,600 bar pressure and a maximum engine output of 60 kW. The two variants available (with and without pump housing) enable the pump to be easily fitted to existing units. The CB18 is designed for systems with up to 1,600-bar pressure and maximum engine output of 100 kilowatts, while the CB28 supports up to 1,800-bar pressure for engines developing a maximum of 200 kilowatts.

Robert Bosch GmbH – Automotive Equipment