Peterbilt to Offer LNG Fueled Vehicles

[RustyJC]

See HERE.

Rusty

[RustyJC]

See HERE.

Rusty

[RustyJC]

Although Peterbilt isn't really an RV-related manufacturer (yeah, I know about Class 8 and Mini-Pete Super Cs and RV toters), the significant (to me, at least) portion of this article dealt with the LNG-fueled version of the Cummins ISX engine:
<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Westport's ISX G engine and LNG fuel system for heavy-duty Class 8 trucks is based on the Cummins ISX diesel engine with cooled EGR. The LNG version of the engine is designed to offer the same horsepower, torque, and efficiency as the base diesel engine it is replacing. The Westport LNG fuel system comprises LNG fuel tanks, proprietary Westport fuel injectors, cryogenic fuel pumps and associated electronic components. The system is 2007 EPA and CARB certified. </div></BLOCKQUOTE>

Rusty

[TXiceman]

This should be an interesting design change. I wonder if they have looked at a mixed LNG/Diesel fuel operation. You know, like the propane injection set up on the lite truck diesels, only take it a step farther.

Ken

[RustyJC]

Industrial "dual fuel" (aka gas/diesel) units have been around for decades. These engines can run in either straight diesel (100% diesel) or gas/diesel (96% or more natural gas, the balance diesel) modes and can switch back and forth on the fly. In gas/diesel mode, the small amount of diesel is used in lieu of sparkplugs to light off the air/gas mixture - this is called "pilot injection".

Unlike the aftermarket conversions, these gas/diesel engines derive most of their energy from the gaseous fuel and are designed from the git-go for this mode of operation with air/fuel ratio controls, fuel changeover capability, etc. which are not required on a diesel engine.

Rusty