How do cars idle at such a high speed but the brakes stop the car?

Asked by Jun 11, 2017 at 11:05 PM about the 2016 Bentley Continental GT W12 AWD

Question type: General

I have learned a lot about cars from my Bentley mechanic mom and
whatever she couldn't answer I used the internet to find out. I asked her
this recently and she didn't have a response so here I go:

How come cars will idle at lets say- 700 RPMS but when you stop at a light,
I understand the brakes stop the car but if the engine is connected to the
transmission, to the driveshaft then to the differential then to the wheels,
how does the engine stay spinning at such a high speed but the wheels
don't move? I understand the brakes hold the car in place at a light but
what does the engine spin when the wheels aren't moving? Does it
disconnect from the transmission and just spin the flex plate, flywheel or
torque converter? Please explain that would be great!

4 Answers

23,625

lets say if you took a clear plastic tube about five inches in diameter , and had a five inch fan on each end facing each other, then capped the ends closed with the fans in the tube, filled the tube with a fluid , turned on the front fan, the engine fan ,the fluid would spin and turn the rear fan , the one connected to the driveshaft. and it would just swirl the fluid until you released the brakes and let er roll

Best Answer Mark helpful
23,625

A torque converter between the engine and transmission is such

115,545

Your torque converter transmits almost no energy at all at idle speed.

24,155

Good question but even better answer. Even I saw that in my head.

Your Answer:

Continental GT

Looking for a Used Continental GT in your area?

CarGurus has 22 nationwide Continental GT listings and the tools to find you a great deal.

Postal Code:

Bentley Continental GT Experts

  • #1
    Tom Demyan
    Reputation
    100
  • #1
    COMETGUY61
    Reputation
    100
  • #3
    jamnblues
    Reputation
    40
View All

Related Models For Sale

Used Bentley Continental GTC
21 listings starting at $372,322
Used Mercedes-Benz S-Class
22 Great Deals out of 168 listings starting at $5,495
Used Maserati GranTurismo
34 listings starting at $201,435
Used Chevrolet Corvette
12 Great Deals out of 533 listings starting at $11,700
Used Porsche Panamera
9 Great Deals out of 87 listings starting at $35,950
Used Mercedes-Benz CLS-Class
13 Great Deals out of 131 listings starting at $8,900
Used Mercedes-Benz G-Class
3 Great Deals out of 58 listings starting at $34,995
Used Land Rover Range Rover
16 Great Deals out of 146 listings starting at $6,800
Used Porsche 911
11 Great Deals out of 204 listings starting at $15,945
Used Maserati Ghibli
27 listings starting at $49,995
Used BMW 6 Series
7 Great Deals out of 86 listings starting at $13,495
Used Mercedes-Benz SL-Class
5 Great Deals out of 125 listings starting at $10,888

Used Cars For Sale

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.