Results 171 to 187 of 245
Thread: Engine Modification
06-19-2004, 11:28 PM #171
wow. almost flat, that's close to ideal!
is that for an electric car or for a hybrid? i am surprised there is little sign of the transition from electric to gas.
06-20-2004, 12:06 AM #172Originally Posted by kwun
- the smooth transition credit goes to toyota's engineering.
06-20-2004, 12:06 AM #173Originally Posted by kwun
06-21-2004, 12:46 AM #174
Electric motor produces maximum torque at 0 rpm . The best combo is diesel-electric.
06-28-2004, 01:31 PM #175
all i can say is 2.0L HDi 136 lol
06-29-2004, 04:37 PM #176
No modification needed here (shown are 10 and 12 cylinders)
It's more efficient than a hybrid car
The Wartsila-Sulzer RTA96-C turbocharged two-stroke diesel engine is the most powerful and most efficient prime-mover in the world today. The Aioi Works of Japan's Diesel United, Ltd built the first engines and is where some of these pictures were taken.
It is available in 6 through 14 cylinder versions, all are inline engines. These engines were designed primarily for very large container ships. Ship owners like a single engine/single propeller design and the new generation of larger container ships needed a bigger engine to propel them.
The cylinder bore is just under 38" and the stroke is just over 98". Each cylinder displaces 111,143 cubic inches (1820 liters) and produces 7780 horsepower. Total displacement comes out to 1,556,002 cubic inches (25,480 liters) for the fourteen cylinder version.
Some facts on the 14 cylinder version:
Total engine weight: 2300 tons (The crankshaft alone weighs 300 tons.)
Length: 89 feet
Height: 44 feet
Maximum power: 108,920 hp at 102 rpm
Maximum torque: 5,608,312 lb/ft at 102rpm
Fuel consumption at maximum power is 0.278 lbs per hp per hour (Brake Specific Fuel Consumption). Fuel consumption at maximum economy is 0.260 lbs/hp/hour. At maximum economy the engine exceeds 50% thermal efficiency. That is, more than 50% of the energy in the fuel in converted to motion.
For comparison, most automotive and small aircraft engines have BSFC figures in the 0.40-0.60 lbs/hp/hr range and 25-30% thermal efficiency range.
Last edited by cooler; 06-29-2004 at 04:47 PM.
06-29-2004, 07:32 PM #177Originally Posted by cooler
06-29-2004, 07:42 PM #178
That's too many ponies in there!! (Also too big)
06-29-2004, 08:52 PM #179
I wonder how much thermal and mechancial efficiency one would get out of an IC engine if carbon-carbon or carbon-graphite-ceramic pistons were used? The usual high-strength pistons are made of forged steel and aluminum.
50% thermal efficiency is very high. Does it incorporate some sort of heat recuperator to extract the last drop of usable heat energy (besides turbos)? A high-bypass turbofan engine has about the same thermal efficiency.
Last edited by Pete LSD; 06-29-2004 at 08:57 PM.
06-29-2004, 09:22 PM #180
A ceramic engine on diesel mode has very high thermal efficiency.
Don't know why it's still not main stream as ceramic engines have been around for decades. (no need of oil, no cooling, dont corrode, etc)
06-29-2004, 09:38 PM #181Originally Posted by cooler
06-29-2004, 09:55 PM #182
yes but relative to the total cost of a vehicle it isnt that much.
no more expensive than equivalent hybrid vehicle
06-29-2004, 09:59 PM #183
Yes, ceramic engines are expensive to make and they crack easily. Ceramic engine is viably only if technology from the F-22 were to filter down to the lowly automobile industry. If I recall correctly, the F-22 has turbine blade that is ceramic in the outer layer and titanium compound matrix in the structural core. The idea is similar to Yonex's Armortec system.
06-29-2004, 11:08 PM #184
however, we dont need nasa grade ceramic for automotive use tho.
also, there are more cars than jet planes so the cost would come down due to mass production.
07-07-2004, 03:19 AM #185Originally Posted by Pete LSD
07-08-2004, 10:56 PM #186
07-09-2004, 02:58 AM #187Originally Posted by Pete LSD
not bad consider it is made to be abused. 720 hp, naturally aspirated, non fuel injected
I wonder how much a racing engine with similar HP made by toyota and honda would cost. Found one site.
Last edited by cooler; 07-09-2004 at 03:09 AM.
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