Saturday, January 4, 2014

What is the difference between hybrid car and electric car?

best hybrid and electric cars
 on China Railways CRH5 high-speed train in Beijing Railway Station
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Kenndy


Hi,
Is there a different between the two or they are the same type of car? Because when I google, I got hybrid electric car.
Thanks!



Answer
Most hybrid cars run on gasoline and electricity. The car runs on the electric motor while doing low speed and/or short-trip driving or when the car reaches cruising speed and the full power of the gasoline engine is not needed. The gasoline engine runs whenever more power is needed (e.g. running on the highway or merging in to traffic) or when the batteries need to be charged. In circumstances where an extreme amount of power is needed, like when going up steep hills, the gasoline and electric motors will work together.

On the other hand, electric cars have to be plugged in between trips and they run solely on batteries and an electric engine.

How is hybrid electric car easily renewed?




hi


and also...
1. What are the waste by-products of hybrid electric car?



Answer
I t is the one of the mst biggest issues of us right now is global warming. Its effects on animals and on agriculture are indeed frightening, and the effects on the human population are even scarier. The facts about global warming are often debated in politics and the media, but, unfortunately, even if we disagree about the causes, global warming effects are real, global, and measurable. The causes are mainly from us, the human race, and the effects on us will be severe. There is many cause or global warming effects they arethe greenhouse is to protect the plants from pollution..
Warming of the Earth's surface and lower atmosphere caused by water vapour, carbon dioxide, and other trace gases in the atmosphere. Visible light from the Sun heats the Earth's surface. Part of this energy is radiated back into the atmosphere in the form of infrared radiation, much of which is absorbed by molecules of carbon dioxide and water vapour in the atmosphere and reradiated toward the surface as more heat. (Despite the name, the greenhouse effect is different from the warming in a greenhouse, where panes of glass allow the passage of visible light but hold heat inside the building by trapping warmed air.) The absorption of infrared radiation causes the Earth's surface and lower atmosphere to warm more than they otherwise would, making the Earth's surface habitable. An increase in atmospheric carbon dioxide caused by widespread combustion of fossil fuels may intensify the greenhouse effect and cause long-term climatic changes. Likewise, an increase in atmospheric concentrations of other trace greenhouse gases such as chlorofluorocarbons, nitrous oxide, and methane resulting from human activities may also intensify the greenhouse effect. From the beginning of the Industrial Revolution through the end of the 20th century, the amount of carbon dioxide in the atmosphere increased 30 percnt and the amount of methane more than doubled. It is also estimated that the U.S. is responsible for about one-fifth of all human-produced greenhouse-gas emissions. Seealso global warming.
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should i have to replace my fuel pump this soon??

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morequesti


hi all,

i was having issues with starting my car (04 nissan sentra) and when i asked the question, i got back an answer that suggested leaving the key in the "on" position for a bit before starting the car and this seems to work. here are my questions:

1. why does my 3 year old car with about 58,000 miles on it need a fuel filter or even worse, a new fuel pump?
2. is this a common problem?
3. what can i do to lessen the wear on the fuel filter/pump?
4. is the fuel pump a costly repair?

i also linked my previous question:

http://tinyurl.com/29dzux

thanks!



Answer
I'm not sure I want to get on the fuel pump and filter wagon quite so fast. In my opinion your symptoms could be caused by a check valve if you have one. You see in 30 minutes of setting the pressure shouldn't bleed down to the point that it makes starting difficult. And, since it will start and run in a satisfactory fashion I have my doubts it is a filter. If you do have a check valve it is probably part of the pump and would require a pump replacement to correct the problem.

To answer your questions though.
1. An automobile component can fail at any time. It seems to me that the pump and associated components should last the life of the vehicle but so should the seat rails and I have seen failures there as well.

2. I don't have first hand knowledge of you vehicle so I can't really address the issue of how often your car would experience starting problems.

3. The best advice I can offer for keeping a fuel system health is to use a fuel injector cleaner in a tank of gas three or four times a year. Aside from that, purchasing clean fuel is a plus. However, knowing whether or not the fueling station is delivering clean fuel is virtually impossible.

4. Yes. Again, I can't address your car specifically but my son and I changed the fuel pump in his Dodge pickup. He bought a used pump for $100 and it took both of us about four hours to change it. Now we are shade tree mechanics and were working in the driveway of my home. I'm sure a shop could beat that time considerably but even if they cut it in half we saved $200 to $300 dollars in labor charges. His pump was in the gas tank. We had to drain the tank, remove it, change the pump and reinstall the tank. I don't know where your pump is located but I will assume that it is in the tank until I'm told differently.

If I were you, I would continue to turn the key, wait a few seconds and start the car. I would continue doing that as long as it worked. The only real down side to doing what I suggest is that if the pump is into a failure mode it could leave you stranded at any time. The pump is electric and I seriously doubt it would fail partially. I think it would simply quit. In other words IMO if it is working, it is working correctly.

I hope that helps you. I'm telling you exactly what I would tell my kids or do for myself so if I am wrong, I would be wrong on my own car too.

2 story house, separate a/c-heat each floor.?




Christy


Pretty sure my downstairs a/c unit is dying. Do I need to replace both downstairs a/c and heater at the same time? Also should I replace the units for the second floor at the same time also? In this economy with three kids trying to watch every penny I can and send wisely. Also what does ice on the lines on the outside unit mean? Had the freon checked in March and supposedly both units were fine. Thanks for any help.


Answer
Hi Christy
It is a good thing having a unit for the upstairs and a unit for the downstairs. It helps control each floor much better as less dense heated air rises causing the upstairs to need more air conditioning capacity in the summer and less heating capacity in the winter. as long as their are 2 thermostats each run independently of each other. This is great because you can concentrate on just the problem unit at hand.

Ice on the unit means it is freezing up. as to why a unit freezes up check here http://answers.yahoo.com/question/index;_ylt=AkrnnDBpqKCoELqQbJRbMQrty6IX;_ylv=3?qid=20110529074844AAhs60a generally you can check to make sure the filter is clean and the temperature is not set to cold and the rest is up to the tech.

That is great that you had the units checked in the spring! It is the best way to find problems before they occur. However sometimes things still happen and a leak can spring up.

As for your consideration for replacement...
how old is the unit? average life span is 15 years
Each system (if it has 2 independent thermostats) work separately of each other. so I would not worry about replacing the unit that is not causing problems.
If you do replace a unit replace the whole system of that unit. Furnace, coil, stat, lines, and condenser. The new units use the new refrigerant and are much more energy efficient. Some units have a tax rebate and even sometimes a electric company rebates for qualifying units.
Units efficiency is in SEER (seasonal Energy Efficiency Ration). it is like MPG on a car, the higher the number the less it cost to operate. Top brands are Lennox, Trane/American Standard and Carrier/Bryant. But more importantly than the brand is the quality of installation.
Use BBB to check the company's track record and look for a company that uses N.A.T.E certified technicians www.natex.org

If you have the room keep the old unit as sometimes parts from the old unit can be salvaged for repairs on the other unit you dint replace.

Other option is since you have 2 units you can just continue to repair them. The advantage is if one fails you will still have cooling/heating from the other unit so it will not be an emergency.

Also in the economy there are other things you can do to save money. You can use window int, blinds/ curtains in the summer to block out some heat. In summer set your thermostat to 78 and in the winter 68. Use fans only in the rooms that you are in to circulate air around you helping you feel cooler.
Good luck




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