Erdgas

Natural-Gas Motronic for sustainable mobility

Natural gas is a fos­sile fuel with a fu­ture. It is pro­duced without the need for ex­ten­sive re­fin­ing, and its com­bust­ion places far less load on the en­vi­ron­ment than gaso­line or die­sel. For the spe­cial re­quire­ments of natural-gas en­gines Bosch has de­vel­oped spec­ial tech­nolo­gies for gas in­jec­tion and en­gine man­age­ment.
A fuel with many
advantages		 CNG engine-management system
The bi-fuel NG-Motronic ECU The NGI2 natural-gas injector

A fuel with many advantages

There is great po­ten­tial for Com­pres­sed Natural Gas (CNG) due to it hav­ing very low emis­sions. Com­pared to gaso­line, CNG com­bus­tion pro­duces about 25% less car­bon di­ox­ide (CO2). Fur­ther­more, CNG has a great po­ten­tial for re­duc­ing un­treated emis­sions. The ex­haust gas is odor­less and con­tains no par­ti­cles.

CNG also has an ad­van­tage when be­ing pre­pared as a fuel: it needs no ad­di­tives and its pro­duc­tion does without com­pli­cated re­fin­ing pro­cesses. Another ad­van­tage is that CNG vehicles place no load on the world's scanty pe­tro­leum re­sources. Methane, CNG's ma­jor compo­nent, can also be pro­duced from or­ganic sub­stances. This closes the CO2 cy­cle and long-term avail­ability is in­creased even fur­ther.

 

CNG vehicles have proven them­selves for years now. Since CNG fill­ing sta­tions are still few and far be­tween, the vehicles are mostly equipped with bi-fuel sys­tems, and the en­gine can run on ei­ther natural gas or gas­oline.

 

CNG has a very high knock resis­tance (130 ROZ as op­posed to be­tween 91 and 100 ROZ for gas­oline). This re­presents fur­ther potential for op­timiza­tion of the CNG en­gine. This is ide­ally suited for super­charging, al­low­ing down­sizing concepts to be ap­plied with the ac­compa­ny­ing im­prove­ments in effi­ciency.

   
The Bi-fuel System can change from gas to gasoline operation during driving without a torque jump
BIFuelSystem