bluey
Well-known member
- Joined
- Oct 18, 2008
- Location
- Australia
- TDI
- Skoda Yeti 2.0L 103kW CR TDI (CFHC) [MY09 Polo TDI 1.9 74kW (AXR) retired with hail damage]
Found these Bosch documents by Jurgen Hammar on diesel technology for passenger cars (PC) and light duty vehicles (LDV). Interesting reading.
Advanced Fuel Injection Equipment - Technology serving Future Diesel Powertrains
Shows product strategy for diesel injection systems, with emphasis on emissions and common rail pump generations. Note the CP4i is designed to be engine lubricatesd rather than fuel lubricated. While we suspect this is designed to reduce HPFP failures caused by low lubricity fuel, it also helps pump efficiency and eliminates the need for a return line.
Aspects on Injection Pressure for Diesel and Gasoline DI Engines
Describes how higher pressure at lower flow rate can provide net improvements in combustion process, and that this will continue to rise over time- planning for 3000bar by 2020. Still there is a tradeoff between power, emissions and noise. Oil lubricated high pressure fuel pump reduces pump power consumption 200-300W.
Advanced Diesel Fuel Injection Equipment – A never ending BOSCH story
Describes DRS digital rate shaping of injection pulse has particular benefits to noise prodiuction without changing the soot/NOX ratio.
Advanced Fuel Injection Equipment - Technology serving Future Diesel Powertrains
Shows product strategy for diesel injection systems, with emphasis on emissions and common rail pump generations. Note the CP4i is designed to be engine lubricatesd rather than fuel lubricated. While we suspect this is designed to reduce HPFP failures caused by low lubricity fuel, it also helps pump efficiency and eliminates the need for a return line.
Aspects on Injection Pressure for Diesel and Gasoline DI Engines
Describes how higher pressure at lower flow rate can provide net improvements in combustion process, and that this will continue to rise over time- planning for 3000bar by 2020. Still there is a tradeoff between power, emissions and noise. Oil lubricated high pressure fuel pump reduces pump power consumption 200-300W.
Advanced Diesel Fuel Injection Equipment – A never ending BOSCH story
Describes DRS digital rate shaping of injection pulse has particular benefits to noise prodiuction without changing the soot/NOX ratio.