markwp2001
Spreadhead
Premium
join:2002-05-25
Long Beach, MS | reply to Fobulous
Re: 2009 VW Jetta TDI or 2009 Toyota Prius
If long term reliability is a factor, there is no doubt that Toyotas, generally, are much more reliable than Volkswagens.
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3SGTE
ST215W
Premium,MVM
join:2000-11-23
there
clubs:
1 edit | reply to dirtyjeffer
said by dirtyjeffer  :snip Re-read my post.
Stop and consider what "ratio ... is varied continuously" might mean. My post describes transmission operation and construction.
Other manufacturers have mild hybrids that couple a conventional (metalbelt type CVT) with a small electric motor. This method is not used for the Prius.
As for the "most people don't like CVTs" statement, that is ridiculous. Many manufacturers have successful CVT models.
Edit:
fixed broken quote tags |
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dirtyjeffer
Merry Christmas
Premium
join:2002-02-21
London, ON
 ·Rogers Hi-Speed
| Nissan is about the only brand really pushing CVT's, and their popularity is partially due to the fact that if you don't take a manual transmission, you get their CVT.
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PolarBear
The bear formerly known as aaron8301
Premium
join:2005-01-03
·CableOne
| reply to 3SGTE
Not to argue for either vehicle, but diesel engines are inherently simpler. They have no throttle body or ignition. Also, diesel engines do last much longer than gasoline engines.
There's a big reason why the trucking industry uses diesel engines - my last Freightliner had 833,000 miles on it (original engine). Ran like a champ.
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matt5
join:2001-10-06
Lagrangeville, NY
| reply to Fobulous
Lot of miss information here.
First off a 09 diesel vs 09 gas the diesel is either as complicated or more under the hood. Everything now is electronically controlled just like a gas motor. The idea is simple, making it work now is not. Don't forget all the emission junk as well on a diesel now.
Their is a learning curve for a diesel, not much but still.
Gas, get in, turn key, go.
Diesel, get in, glow plug, wait, start. Cold weather (this may not matter for the OP) either plug it in at night or crank the everliving hell out of it and hope she starts. Few people I know run covers on their diesels in the winter to keep them warmer. Winter the fuel is "watered" down to help prevent gelling, etc, etc.
Regenerative breaking is 100% a free ride, and it will save on brakes as the electric motor will do the breaking (to a point) and turn the inertia of the car into electric rather than heat.
As glow plugs have been said, diesels do have an ignition, and you will never start one when cold with out. They do go bad, and need to be replaced as well as the relay that controls them.
Truckers use diesel motors because of the great low end torque, the greater power per unit of fuel, among other things. If you took a gas motor for pure hauling I'm sure you will get a ton of miles on it too, remember highway driving is much easier on a vehicle than city.
Diesel fuel where I am in NY was about 1$ a gallon more last year than gas, almost hit $5/gallon. Might have even hit 5$/gallon. I believe right now it's about the same price as regular.
Bottom line if you are going to do a large amount of city driving, the hybrid is going to work out well because of all the stop and go. If you do a large amount of highway, check out the diesel or maybe a non hybrid. You do not need to be a rocket scientist to drive a diesel but it is different than a gas. |
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Nemokrad
join:2002-04-24
Miami, FL | reply to Fobulous
You also get a $1300 tax credit with the Jetta TDI: »www.fueleconomy.gov/feg/taxLeanBurn.shtml |
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Jim Gurd
Premium
join:2000-07-08
Plymouth, MI
·Comcast
| reply to Fobulous
said by Fobulous :Because when i drive Gasoline engine vehicle Super Premium is what i put in it.. Unless your vehicle knocks on regular you are wasting your money paying extra for premium. The octane rating is the measurement of a fuel's resistance to detonation. If it doesn't detonate on 87 octane then you can use it without a problem and save the extra cost of premium because premium will offer you no benefit whatsoever.
The only exception to this rule is for vehicles equipped with a knock sensor. My Subaru Impreza WRX has one and calls for premium fuel. I can run 87 octane and it will retard the ignition timing to prevent knock. If I run premium the engine will automatically detect and adjust the timing to take advantage of the higher octane fuel.
The bottom line is that if your car doesn't have a knock sensor and it runs well on 87 octane you don't need premium, period. If you do have some knocking try going with 89 octane and see if that makes a difference. It's still less per gallon than the cost of premium. Most people who buy premium don't need it.
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3SGTE
ST215W
Premium,MVM
join:2000-11-23
there
clubs:
| reply to PolarBear
said by PolarBear : They have no throttle body or ignition. All modern emissions legal diesels have throttles.
A throttle is necessary in part to make the EGR function correctly.
The following is a quick list of controls used on a modern diesel:
Exhaust fuel injector
Throttle body
EGR valve
High flow EGR cooler and bypass valve
Urea injector, Urea tank and Pump
Piezo injectors plus high voltage driver module
De-NOx catalyst
Catalyst
Diesel Particulate Filter (in exhaust)
Wide-band O2 sesnors
Pressure Differential sensors
EGTs
Electronically controlled high pressure mechanical fuel pump
Turbocharger with electrically controlled variable vane mechanism (an integral part of the system)
Low-compression (relatively speaking - among diesels)
Image of exhaust system - post turbos
PLEASE NOTE:
None of this means that I am talking s**t about Diesels.
What has been done of late is an incredible technical achievement. The point is that terms such as 'simple' do not apply to new diesels.
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Striving for Parfection. |
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