Diesel injection system with closed-loop control
Bosch has developed a new injection system for diesel engines. The so-called Needle Closing Control system is based on the common rail technology with solenoid valve injectors and enables a closed-loop control of the injection duration. Using a piezo sensor in the injector and a new software architecture, the system measures and controls the exact duration of the individual fuel injection events with a resolution of a few millionths of a second. As a result, fuel dosing and processing, important for the engine, remain stable over the entire lifetime of the vehicle under real-driving conditions. In this way, the system makes an important contribution to the future competitiveness of diesel engines in passenger cars.
Robust System Layout
The challenge to comply with legal emission limits has increased significantly with the introduction of measurements to be performed under Real Driving Emissions (RDE). Against this background, a comprehensive approach covering the entire powertrain is...
- Kufferath, A.; KrÜger, M.; Naber, D.; MailÄnder, E.; Maier, R.: The path to a Negligible NOx-Immission Contribution from the Diesel Powertrain. 39th International Vienna Motor Symposium, 2018Google Scholar
- Wintrich, T.; Rothe, S.; Bucher, K.: RDE Step 2 and beyond — Bosch Diesel FIE System contribution. SIA Powertrain Congress, 2018Google Scholar
- Naber, D.; Bareiss, S.; Kufferath, A.; KrÜger, M.; Schumacher, H.: Measures to fulfill “Real Driving Emission (RDE)” with Diesel passenger cars. 18th Stuttgart Symposium, 2018Google Scholar