It's probably only of passing interest to most of you guys, but I've been developing prototype after-market systems in Australia for the past seven years.
Our latest version is a 2007 (Australian) Ford Falcon station wagon (6 cylinder in-line, 4.0 litre) bi-fuel. It is fitted with a sequential multi-point fuel injected CNG system. The engine has a compression ratio of 10.3:1. In addition to the existing catalytic converter, we run a methane specific cat to control hydrocarbon emissions.
I have 55 cubic metres (14.67 gge) storage on board, and we have replaced the original 76 litre (20 gallon) gasoline tank with a 20 litre (5 1/4 gallon) limp home tank.
I get 640km (400 miles) on CNG (mainly highway driving) with gasoline backup of 160km (100 miles).
Our next step (next month?) is to fit a supercharger with 4psi boost that will switch on when we switch to CNG. This will raise the effective compression ratio to 13.4:1, which is ideal for our CNG composition. This is expected to result in much better combustion and further reduce emissions. I don't have a handle on what it will do to my fuel economy yet.
We have explored the possibility of bringing our systems to the US, but there are just too many regulatory hoops to jump through to make it feasible. Perhaps one day!!
By the way, I really enjoy reading all the posts on this site.
Our latest version is a 2007 (Australian) Ford Falcon station wagon (6 cylinder in-line, 4.0 litre) bi-fuel. It is fitted with a sequential multi-point fuel injected CNG system. The engine has a compression ratio of 10.3:1. In addition to the existing catalytic converter, we run a methane specific cat to control hydrocarbon emissions.
I have 55 cubic metres (14.67 gge) storage on board, and we have replaced the original 76 litre (20 gallon) gasoline tank with a 20 litre (5 1/4 gallon) limp home tank.
I get 640km (400 miles) on CNG (mainly highway driving) with gasoline backup of 160km (100 miles).
Our next step (next month?) is to fit a supercharger with 4psi boost that will switch on when we switch to CNG. This will raise the effective compression ratio to 13.4:1, which is ideal for our CNG composition. This is expected to result in much better combustion and further reduce emissions. I don't have a handle on what it will do to my fuel economy yet.
We have explored the possibility of bringing our systems to the US, but there are just too many regulatory hoops to jump through to make it feasible. Perhaps one day!!
By the way, I really enjoy reading all the posts on this site.
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