Petrol Compression Engine for Australia. Would it be worth it?

[irlewy86]

Thought of the day....

As we all know reducing emmisions and fuel consumption is high on the Auto makers lists at the moment. Europe seems to be ploughing ahead with Diesel Compression engines and enjoying the benifits of lower fuel costs. However in Australia the ecconomy of Compression engines is lost a little with a 17.5cpl tax placed on Diesel and a higher benchmark price from Asia. Would it be benifical for our market to see the introduction of petrol compression engines. (The ecconomy of diesel with the bowser price of unleaded). This of course would all hinge on the tax remaining on Diesel, however I still think it would be a niche market worth aiming for if the dollars start matching up.

Any ideas?

[outback_ute]

I'd imagine it will be on the radar but they will go to direct injection first

[FGII-XR6]

I think you will find petrol is too volatile for this you would get detonation due to the higher compression required for ignition thats why the use diesel ( less volatile) and not petrol

Originally Posted by irlewy86

Thought of the day....

As we all know reducing emmisions and fuel consumption is high on the Auto makers lists at the moment. Europe seems to be ploughing ahead with Diesel Compression engines and enjoying the benifits of lower fuel costs. However in Australia the ecconomy of Compression engines is lost a little with a 17.5cpl tax placed on Diesel and a higher benchmark price from Asia. Would it be benifical for our market to see the introduction of petrol compression engines. (The ecconomy of diesel with the bowser price of unleaded). This of course would all hinge on the tax remaining on Diesel, however I still think it would be a niche market worth aiming for if the dollars start matching up.

Any ideas?

[outback_ute]

That's what I thought but I plugged the key words into google and they are actually working on it, not with diesel-levels of compression, just slightly higher than normal.

[vztrt]

You got any literature on these types of engines, like au3xr6 said petrol is too volatile for high compression engines.

[JG66ME]

What needs to happen is the tax on diesel needs to be replaced by a road user charge for trucks, something like they have in New Zealand. Truck rego also needs to be reduced, offset by the road user charge.

In NZ road user charges are based on axle load and milage.

[vztrt]

Originally Posted by JG66ME

What needs to happen is the tax on diesel needs to be replaced by a road user charge for trucks, something like they have in New Zealand. Truck rego also needs to be reduced, offset by the road user charge.

In NZ road user charges are based on axle load and milage.

In oz trucks get the excise back as they have to claim for it. Current claim rate is 17.431c/l (dropped from 18.5 c/l last yr). The extra tax on diesel is there to deter people from buying diesel cars in oz (greenies lobbied as they said it was a dirty fuel...which it may have been in 99/00 but these new diesels are very clean).

[JG66ME]

Originally Posted by vztrt

In oz trucks get the excise back as they have to claim for it. Current claim rate is 17.431c/l (dropped from 18.5 c/l last yr). The extra tax on diesel is there to deter people from buying diesel cars in oz (greenies lobbied as they said it was a dirty fuel...which it may have been in 99/00 but these new diesels are very clean).

I didnt know that, thanks for the heads up.

[Bossxr8]

MB are working on the dieso-otto engine, which combines diesel and petrol engines. One of their concept cars had one last year.

[outback_ute]

Originally Posted by vztrt

You got any literature on these types of engines, like au3xr6 said petrol is too volatile for high compression engines.

http://www.green-car-guide.com/news/...aturn-aura.htm
http://www.motorauthority.com/sparkl...ving-fuel.html

You will find more info looking for homogeneous charge compression ignition.

[XR Martin]

I was under the impression that Diesel still produces excessive amounts of soot when compared to petrol, soot being the main cause of smog (and hence why diesel laws in California are so strict)

[Fev]

Originally Posted by XR6 Martin

I was under the impression that Diesel still produces excessive amounts of soot when compared to petrol, soot being the main cause of smog (and hence why diesel laws in California are so strict)

It does, although unfortunantly for anything that breathes air in the vicinity of drag strips in america, they dont regulate the diesels being drag raced

look up diesel drags on youtube - the amount of black smoke is horrendous

[vztrt]

Originally Posted by outback_ute

http://www.green-car-guide.com/news/...aturn-aura.htm
http://www.motorauthority.com/sparkl...ving-fuel.html

You will find more info looking for homogeneous charge compression ignition.

Thanks for that, just gotta work out how they keep the temperatures lower.

Originally Posted by XR6 Martin

I was under the impression that Diesel still produces excessive amounts of soot when compared to petrol, soot being the main cause of smog (and hence why diesel laws in California are so strict)

No that was the diesels of old. New diesels are quite clean due to emission regulations. Tier 3 was the first big step in diesel emissions where they reduced the amount of particulates from the exhaust (this is why we now have low sulfur diesel).
Tier 4 is much harder as they need to bring down the NOx levels down to about 0.01ppm. Tier 4 is the reason why Caterpillar will not make on highway truck engines anymore as they cannot meet it (even if they produce a more advanced truck engine then the competitors).
The problem with these new diesel engine from companies like Volvo is that they use what is called EGR which destroys the internals in engines and reduces the life of the engine.