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Turning car off at stoplights
#31
Forrest wrote:
It would not be safe on older vehicles to swich off the engine approaching a stop, because you would loose power steering and brakes. Hybrid vehicles are designed to turn the ICE off and still run the power steering and brakes - I assume these systems run on electric power.

Yes, they do. FAR more efficient.

I know these are really old numbers, but they illustrate the idea.

At full speed, a water pump driven fan can suck up 15 horsepower on an old American V-8 auto or truck. 765 watts equals 1 horsepower. That's @55 amps at 14 volts, assuming no power loss. So, a water pump driven fan can consume a massive amount of energy, and all but a tiny amount is wasted. An electric cooling fan, or even 2 11" or 12" ones can consume between 6 to 18 amps, depending on design. So, even a pair of big inefficient cooling fans only need 1/4 horsepower, assuming no power loss. Now you know why they went to electric cooling fans. Add to that electric power steering, electric water pumps, and electric A/C compressors. The power savings are HUGE.
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Messages In This Thread
Turning car off at stoplights - by rz - 03-06-2022, 10:08 AM
Re: Turning car off at stoplights - by rz - 03-06-2022, 10:09 AM
Re: Turning car off at stoplights - by Forrest - 03-06-2022, 10:51 AM
Re: Turning car off at stoplights - by bazookaman - 03-06-2022, 12:17 PM
Re: Turning car off at stoplights - by Fritz - 03-06-2022, 01:23 PM
Re: Turning car off at stoplights - by ztirffritz - 03-06-2022, 02:58 PM
Re: Turning car off at stoplights - by M A V I C - 03-06-2022, 03:40 PM
Re: Turning car off at stoplights - by DinerDave - 03-06-2022, 04:06 PM
Re: Turning car off at stoplights - by Wags - 03-06-2022, 04:47 PM
Re: Turning car off at stoplights - by mrbigstuff - 03-06-2022, 04:50 PM
Re: Turning car off at stoplights - by Acer - 03-06-2022, 05:16 PM
Re: Turning car off at stoplights - by DavidS - 03-06-2022, 05:47 PM
Re: Turning car off at stoplights - by jdc - 03-06-2022, 05:58 PM
Re: Turning car off at stoplights - by DavidS - 03-06-2022, 06:03 PM
Re: Turning car off at stoplights - by RAMd®d - 03-06-2022, 06:07 PM
Re: Turning car off at stoplights - by wurm - 03-06-2022, 06:43 PM
Re: Turning car off at stoplights - by PeterB - 03-06-2022, 06:45 PM
Re: Turning car off at stoplights - by S. Pupp - 03-06-2022, 07:11 PM
Re: Turning car off at stoplights - by Buzz - 03-06-2022, 07:48 PM
Re: Turning car off at stoplights - by DavidS - 03-06-2022, 08:31 PM
Re: Turning car off at stoplights - by deckeda - 03-06-2022, 09:04 PM
Re: Turning car off at stoplights - by deckeda - 03-06-2022, 09:08 PM
Re: Turning car off at stoplights - by PeterB - 03-06-2022, 10:44 PM
Re: Turning car off at stoplights - by Forrest - 03-06-2022, 10:57 PM
Re: Turning car off at stoplights - by Racer X - 03-06-2022, 11:58 PM
Re: Turning car off at stoplights - by Racer X - 03-07-2022, 12:01 AM
Re: Turning car off at stoplights - by rz - 03-07-2022, 12:12 AM
Re: Turning car off at stoplights - by Don C - 03-07-2022, 12:39 AM
Re: Turning car off at stoplights - by Speedy - 03-07-2022, 03:22 AM
Re: Turning car off at stoplights - by RAMd®d - 03-07-2022, 06:11 AM
Re: Turning car off at stoplights - by Drew - 03-07-2022, 11:59 AM
Re: Turning car off at stoplights - by Grateful11 - 03-07-2022, 12:39 PM
Re: Turning car off at stoplights - by RAMd®d - 03-07-2022, 04:33 PM
Re: Turning car off at stoplights - by mikebw - 03-08-2022, 04:06 PM
Re: Turning car off at stoplights - by Drew - 03-10-2022, 02:04 AM

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