How to Deal With Unintended Acceleration
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From: Alexander Rogge on 11 Mar 2010 03:15 Scott in SoCal wrote: > Among other things, they proved that the > brakes can *always* overpower the engine and stop the car - even on a > 540HP supercharged Roush Mustang. > > http://www.caranddriver.com/features/09q4/how_to_deal_with_unintended_acceleration-tech_dept The brakes on the Roush can stop the Roush. That's because Roush didn't put electronic complications into its braking system. The Mustang brakes stop the car, and are designed to counter brake-fade by cooling quickly during and after brake application. I wonder how many electronic complications exist between the brake pedal of the PriuSloth and the application of braking power that is intended to stop the car immediately, and how much priority was given to stopping the PriuSloth instead of recharging its battery with the brakes.
From: Dave__67 on 11 Mar 2010 08:03 On Mar 11, 1:42 am, Scott in SoCal <scottenazt...(a)yahoo.com> wrote: > Great article from C&D. Among other things, they proved that the > brakes can *always* overpower the engine and stop the car - even on a > 540HP supercharged Roush Mustang. > > http://www.caranddriver.com/features/09q4/how_to_deal_with_unintended... > -- > The MFFY Litmus Test: > If your maneuver forces another driver WHO HAS THE RIGHT-OF-WAY > to alter course or speed, what you did was probably MFFY. Too bad they're wrong. Shame on Subaru for undersizing the brakes on my wagon, but the brakes cannot stop the car with the throttle WFO. Dave
From: Speeders & Drunk Drivers Kill Kids on 11 Mar 2010 12:49 """The new wrinkle here: the keyless, push-button start-and-stop systems in many vehicles. Owners need to be aware that these systems require a long press of the button to shut off power when the car is moving (so that an inadvertent touch of the button by the driver doesn�t kill the engine).""" Why did they go to this push button system???. I see no benefit to the the consumer though i'm sure it's expensive and means more money for the car industry.
From: Dave__67 on 11 Mar 2010 15:26 On Mar 11, 10:35 am, Scott in SoCal <scottenazt...(a)yahoo.com> wrote: > Last time on rec.autos.driving, Dave__67 <spamTHIS...(a)yahoo.com> said: > > >On Mar 11, 1:42 am, Scott in SoCal <scottenazt...(a)yahoo.com> wrote: > >> Great article from C&D. Among other things, they proved that the > >> brakes can *always* overpower the engine and stop the car - even on a > >> 540HP supercharged Roush Mustang. > > >>http://www.caranddriver.com/features/09q4/how_to_deal_with_unintended.... > > >Too bad they're wrong. > > >Shame on Subaru for undersizing the brakes on my wagon, but the brakes > >cannot stop the car with the throttle WFO. > > What was the methodology for your test? Are your brakes in proper > working condition? Are your results repeatable across other Subaru > wagons of the same year and model as yours? > -- > The MFFY Litmus Test: > If your maneuver forces another driver WHO HAS THE RIGHT-OF-WAY > to alter course or speed, what you did was probably MFFY. Bedded-in ceramic pads on good quality rotors, all caliper pistons retracted freely, pads sliding on new hardware, caliper sliders moving freely. Roll slowly, floor gas, immed. stand on brake, brakes can limit the speed to about 10-15. Go 70mph, floor gas, stand on brakes, brakes can get the car down to about 20-25mph, after some period at that speed I'm sure the brakes would fade. What is interesting is the decel is quite quick until the car downshifts to 1st. 2003 Outback wagon, 3 liter 6, 4 speed auto. The 3.0 H6 has much better torque down low than the later 3.0R or the 3.6. I have not been able to find another 2000-2004 H6 owner to repeat the test. Of course if your car is 'runaway' and you can't figure out a safe place to stuff it at 15 or even 25mph, that's a poor-driver problem- assuming the key didn't work and it wouldn't go into N. Dave
From: Alexander Rogge on 12 Mar 2010 03:27
> """The new wrinkle here: the keyless, push-button start-and-stop systems in > many vehicles. Owners need to be aware that these systems require a long > press of the button to shut off power when the car is moving (so that an > inadvertent touch of the button by the driver doesn�t kill the engine).""" A simpler and safer method would be to put a flip-cover over the power button and any other critical control switches. |