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Bosch’s innovative start-stop coasting function recently won a technology award in Germany.
Using the enhanced start-stop technology, an internal-combustion engine is stopped not only when the vehicle is stationary, but also temporarily while it is in motion. This happens as soon as the driver releases pressure on the accelerator. In conventional internal-combustion engines, this can mean a fuel saving of as much as 15% says Bosch.
A ten-strong panel of judges, made up of renowned experts from across Europe, voted in favor of the Bosch coasting function. They praised its suitability for the mass-market. “Start-stop coasting won over the judges because the technology is cost-effective, can be combined with any internal-combustion engine, and significantly reduces consumption,” said Bettina Mayer, the editor-in-chief of Automobil Produktion.
Much of the innovation is based on enhanced software using existing sensor information. Moreover, no additional components are needed in most cases.
The way the enhanced start-stop mechanism works is as simple as it is clever: as soon as the driver steps off the gas pedal, the clutch opens electronically. This works via the automatic transmission, or in the case of manual transmission via the Bosch e-clutch. The internal-combustion engine is stopped, and the vehicle coasts without any engine-braking effect. During any one journey, 30% of the time is spent coasting on average. In more powerful engines with greater displacement, the average 15% fuel saving can be improved upon.