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John Dennehy |
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V.P. of Marketing and Communications
Espar Heater Systems
(800) 387-4800
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Mr. Dennehy has been V.P. of Marketing and Communications with Espar for 9 years. He has played an integral part in working with several levels of government agencies in both the U.S. and Canada to bring awareness to the challenges of idling, anti-idling technologies and the reduction of green house gases. Mr. Dennehy will entertain questions on anti-idling technologies, state regulations and state/province initiatives regarding rebates/incentives and also idling laws and fines within each state.
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| Question 57
January 25, 2006 @ 12:00 am |
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| Q. |
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how do the experts determine that we are burning approx 1 gal fuel p/hr? my own studies show that yes with the old mechanical fuel pumps we burned 1- 1/4 gal. p/hr, but with computerized injection systems, my calculations show only 3/10-4/10 gal per hr. burned at idle. these numbers are directly from cummins engine computer print outs of an n-14 500 hpwr engine. i could make these records available for review. also, there is a theory that engine wear is not determined by miles, but rather fuel burned. though i have a system similar to yours and therfore understand that no fuel burned is the best solution. i have posed this particular question regarding fuel burned at idle to challenge the mathmatics and science driving the urgency of this so called problem. lets get real, if anyone really studied the “at idle consumption” with todays computerized injection systems they would find that the present hype regarding the amount of fuel burned at idle is wrong.
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I am inclined to post your email with your findings, interesting statistics. However I believe that you are idling that engine at dead idle which is probably around 400 rpm, the engines being manufactured today are extremely efficient and there is no waste/supplemental heat being produced. If you were to try and get heat to the cab for from the coolant, you would probably find that you would not be able to stay comfortable, hence having to boost the rpm up to 900-1000 rpm and that is where you would run into the gal/per hour.
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