Study looks at covering California’s canals with solar panels - Page 3 - PeachParts Mercedes-Benz Forum

Capt. Mike · #31 04-06-2021, 02:34 PM

Quote:

Originally Posted by speednjay

My brother got Tboned in his Tesla a few months ago and I’m positive he wished he was in a s class

I took my wife’s Accord to the grocery today, and I wish I was in an S-Class.

Autoputzer · #32 04-07-2021, 11:22 PM

Quote:

Originally Posted by speednjay

I’m sure they’ll dump more things into the fuels to keep the efficiency down.

The compression ratios of diesels have gone down, to control NOx. In the meantime, gasoline engines have widely adopted direct injection, turbocharging, and higher compression ratios. The efficiency gap between diesel and gasoline is narrowing. Maybe that two-stroke, dual crankshaft diesel will change that.

A lot of those additives have a lot of energy in their own right. The industry leader is Lubrizol. They're always having problems with their plants catching on fire.

Jorn · #33 04-08-2021, 02:57 PM

Quote:

Originally Posted by Angel

what about all of the road racing that happens there ?

That's right by my house.

I drove it ones...

cmac2012 · #34 04-08-2021, 03:58 PM

Quote:

Originally Posted by Autoputzer

The compression ratios of diesels have gone down, to control NOx. In the meantime, gasoline engines have widely adopted direct injection, turbocharging, and higher compression ratios. The efficiency gap between diesel and gasoline is narrowing. Maybe that two-stroke, dual crankshaft diesel will change that.

A lot of those additives have a lot of energy in their own right. The industry leader is Lubrizol. They're always having problems with their plants catching on fire.

There's some other info on that. Achates is saying their engine can compress ignite with either diesel or gasoline. I haven't found anything yet where they say one is clearly preferable to the other. From their literature (pretty sure), though not their website:

Quote:

More than 25% of all the energy consumed in the United States is used in transportation, with the majority of that consumed in cars and trucks. Improved powertrain systems and engine technologies can enable more efficient and cleaner vehicles. While their efficiency has steadily advanced in recent decades, current engines cannot cost effectively achieve the efficiencies needed to significantly increase vehicle fuel economy. New and novel approaches are needed to spur transformational increases in vehicle powertrain efficiency. The combination of opposed-piston (OP) and gasoline compression ignition (GCI) technologies has the potential to overcome current cost and efficiency challenges and significantly advance engine technologies for decades to come.

The team led by Achates Power will develop an internal combustion engine that combines two promising engine technologies: an opposed-piston (OP) engine configuration and gasoline compression ignition (GCI). Compression ignition OP engines are inherently more efficient than existing spark-ignited 4-stroke engines (potentially up to 50% higher thermal efficiency using gasoline) while providing comparable power and torque, and showing the potential to meet future tailpipe emissions standards. GCI uses gasoline or gasoline-like fuels in a compression ignition engine to deliver thermal efficiency on par with diesel combustion. However, unlike conventional diesel engines, this technology does not require the added expense of high-pressure fuel injection equipment and sophisticated aftertreatment systems. The OP/GCI engine technology is adaptable to a range of engine configurations and can be used in all types of passenger vehicles and light trucks. By successfully combining the highly fuel efficient architecture of the OP engine with the ultra-low emissions GCI technology, the resulting engine could be transformational, significantly reducing U.S. petroleum consumption and carbon dioxide.

https://arpa-e.energy.gov/technologies/projects/efficient-engine-design