March 11, 2010

THE SOLUTION IS MORE COMPLEX ELECTRONICS, NOT LESS...:

Braking Bad (RICHARD A. SCHMIDT, 3/11/10, NY Times)

ased on my experience in the 1980s helping investigate unintended acceleration in the Audi 5000, I suspect that smart pedals cannot solve the problem. The trouble, unbelievable as it may seem, is that sudden acceleration is very often caused by drivers who press the gas pedal when they intend to press the brake.

From the mid-1980s until 2000, thousands of incidents of sudden acceleration were reported in all makes and models of cars (and buses, tractors and golf carts). Then, as now, the incidents were relatively rare among car crashes generally, but they were nevertheless frequent and dangerous enough to upset automakers, drivers and the news media.

I looked into more than 150 cases of unintended acceleration in the 1980s, many of which became the subject of lawsuits against automakers. In those days, Audi, like Toyota today, received by far the most complaints. (I testified in court for Audi on many occasions. I have not worked for Toyota on unintended acceleration, though I did consult for the company seven years ago on another matter.)

In these cases, the problem typically happened when the driver first got into the car and started it. After turning on the ignition, the driver would intend to press lightly on the brake pedal while shifting from park to drive (or reverse), and suddenly the car would leap forward (or backward). Drivers said that continued pressing on the brake would not stop the car; it would keep going until it crashed. Drivers believed that something had gone wrong in the acceleration system, and that the brakes had failed.

But when engineers examined these vehicles post-crash, they found nothing that could account for what the drivers had reported. The trouble occurred in cars small and large, cheap and expensive, with and without cruise control or electronic engine controls, and with carburetors, fuel injection and even diesel engines. The only thing they had in common was an automatic transmission. An investigation by the National Highway Transportation Safety Administration found no electro-mechanical defects to explain the problem. Nor did similar government studies in Canada and Japan or any number of private studies.


...so that the car can be removed from the control of the driver altogether.

Posted by Orrin Judd at March 11, 2010 7:02 AM
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