I am a beginner learning to program C. My PC runs Windows XP and I am experiencing a problem. When I try to send data to the printer string (stdprn), absolutely nothing comes out on the printer. The program runs as if nothing is wrong, except that anything sent to the printer stream...
You can get even more than two peaks. This is due to the tuning of the intake system. pressure waves reflect off of the various transisions and plenums in the intake system (intake manifold, resonators, air cleaner box, etc.)
I have measured blowdown on a production V6 engine, in the neighborhood of 100 crank angle degrees at 1200 rpm. But this will not help you. The way you measure it is to measure cylinder pressure, and with some calculations you can calculate the mass flow out of the cylinder during the exhaust...
Not sure of the comment about more torque. DI fuel economy comes from running stratified and the thermal benefits. At WOT, even DI engines run stoic., or else you lose power. With DI, you even lose the benefits of cooling the intake air with MPFI and would get less air in the cylinder each...
Typical gasoline spark ignited engines today run stoichiometric MOST of the time. The main reason is that this is where the three way catalyst (HC, CO, and NOx) operates most efficiently to reduce all 3 major regulated pollutants. And high catalyst efficiency is REQUIRED to meet todays...
See my entry under "Automotive engineers" forum, "a debate on automotive engineering". I think the U.S. has great engineers, but the problem is how the companies are run. Japanese auto companies are run by engineers, U.S. auto companies are run by business executives...
Some thoughts on why propane likely is not used over gasoline:
In terns of fueling infrastructure, Propane fueling facilities are not as numerous as gasoline fueling facilities. Propane fueling is also more difficult because it is stored under pressure to store as a liquid. Gasoline is not...
For a paper that receint, you can download it off of the internet... For a fee. I think for SAE members, it is $10 a paper. Go to WWW.SAE.ORG and select the bookstore. Then look for technical papers and search the number given. SAE papers are a great source of information.
I don't know the answer to your questions, but I have a few ideas that may give some insight.
It seems there are two questions here... SI turbo vs. CI turbo, and SI turbo vs. SI naturally aspirated. Background on the first question is given in the threads, "CI vs SI" thread in...
I work in the automotive industry, specifically on automotive spark ignition (SI) engines. On automotive SI engines, the air / fuel ratio is typically controlled to the stoichiometric value for reduced exhaust emissions using a three way catalyst (due to heavy goverment legislation by EPA, CARB...
To the best of my knowledge... No, none in production. The closest to this that I know of is a CI engine that uses directly injected diesel fuel as the pilot ignition source, but the bulk of energy (at full load) comes from natural gas. The natural gas is premixed with air in the intake...
I use three web sites that provide good information on current happenings in the automotive industry. Some are better than others, depending on your interests. But all cover technical as well as other areas. All three organizations also publish magazines as well for the automotive industry...
Anything is possible...
You would inject the fuel directly into the cylinder, like a diesel or a gasoline direct injection engine. The problem is gasoline is made to resist ignition at high pressure and temperature. First you would have to get the cylinder pressure high enough at the point of...
I have never heard of a Willen line, what is it?
If you can measure torque, you can compute brake mean effective pressure (BMEP). If you then know or have a correlation for friction MEP (FMEP), then
NIMEP = BMEP + FMEP
I do believe the Heywood text and others have some empirical correlations...
