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Showing posts with label Brake. Show all posts
Showing posts with label Brake. Show all posts

Tuesday, October 25, 2011

Why You Shouldn't Brake Into A Pothole

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Next to an actual fender bender, the sound of your ride making a direct hit on a pothole is one of the most spine-jolting noises you’ll ever hear in your car.

But if you think your nervous system is rattled by running your 3,000-pound ride into an enormous road abyss, think about your car’s tires, chassis, suspension and rims, all of which can be compromised after a particularly vicious encounter with a pothole. We've recently talked to a few experts about winter's worst car threat and got some pretty interesting -- if unlikely -- advice.

“Potholes are a big issue, especially at the end of winter  when the ground expands and new craters appear,” said Matt Edmonds, VP of The Tire Rack. 

He told us that drivers shouldn’t assume they're in the clear if immediate symptoms don’t appear. 

“A lot of times, a driver will hit a pothole straight on and assume since they didn’t get a flat that there’s been no damage to the tire, rim or suspension,” Edmonds said.

He recommends getting the car aligned or at least inspected during the next oil change following a severe pothole hit.
“If something has been damaged in the suspension after smacking a pothole, you need to find that out rather that than waiting for a breakdown when you’ll pay towing fees in addition to having to fix the problem," Edmonds said.

Rich White, Executive director of the Car Care Council, says drivers should heed warning signs if they’ve recently hit a crater.

“If your car pulls in one direction instead of maintaining a straight path after you strike a pothole, that indicates an alignment problem,” he says. “You have the get that checked out because your alignment ensures safe handling of the car as well as keeping your tires in good condition over time.   Also, if you feel a loss of control, if you feel the car bottoming out or bouncing excessively on rough roads, those are indicators that the steering and suspension may have been damaged---and that’s something you need to pay attention to, because both are key safety-related systems that determine your car’s ride and handling.”

Of course, it’s best not to hit a pothole in the first place.

Here's the advice White provided to help you avoid them, or minimize damage if you strike one.

Don’t tailgate
“If the driver in front of you hits a pothole, you’ll have a better chance to take evasive action if you’re not riding their rear bumper,” said White.

Slow down
Don't believe in the old wives tale that you could, in theory, "fly" over the pothole if you're going really fast. That might work in a movie but not in the real world. Most potholes are big enough to do damage even if you're traveling at highway speeds.

“When you hit a pothole at faster speeds, the damage can be far worse,” said White.

Puddles Contain Hidden Dangers
Use extreme caution when driving over puddles.

“They can conceal massive potholes,” said White.

This one rings especially true for me. Two years ago, one water-concealed pothole on a ramp took out both front and rear tires on the right side of my car.

The only benefit of the winter weather in this case is that sometimes a puddle can freeze to fill in a pothole temporarily. But don't count on it.

Hold the steering wheel tightly
Make sure you're holding the wheel so you don't lose control. A tight, two-handed grip is recommended.

“Hitting a pothole when you’ve got a loose grip on the wheel can snap the wheel left or right, and you into another car, or off the road,” White says.

If you’re going to hit a pothole, don’t brake into it
This is probably the most unorthodox piece of advice we've received about potholes so far, but it stands to reason.

“It can actually increase damage," said White. "Get off the brakes the moment before you hit and let the car absorb the blow.”

When you brake heavily, your car tends to nose dive. When you let off the brake, the car rocks back and you have more suspension travel over the front wheels. This is a good thing when you're going to do some crater exploring on your favorite road.

Alignments, Potholes Or Not
Tire Rack's Edmonds says it’s a good idea to get your car aligned after a severe winter regardless of whether or not you’ve struck a pothole.

“This winter has been brutal for drivers in the Midwest and northeast,” said Edmonds. “And your car may look fine at spring thaw. But when you drive faster in summer, that’s when you’ve really got to make sure your car is up to the task and has no post-winter alignment or tire issues.” 



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Monday, October 24, 2011

Tests Show Toyota Driver Lied, Didn't Brake

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The runaway Toyota Prius in New York has been attributed to driver error after an investigation by Toyota and NHTSA (Denis Poroy, AP).

At this point, we can all agree that apologies aren’t enough.

Over the past month, every Toyota employee from CEO Akio Toyoda down to your local dealership’s janitor has apologized for the company’s quality meltdown.

Realizing that wasn't quite enough, Toyota took the bold step of going after recent unintended acceleration incidents, hoping to either find the root problem or debunking the claims as false.

After federal investigation and Toyota's own available black box data, two of the most notable incidents over the last two weeks seem to fall into the latter category: both the San Diego and New York runaway Prius incidents appear to be more than originally reported. The driver of the Prius in San Diego who ran out of control until police stopped him had a colorful past and his car was found to be capable of stopping under its own power. This week, federal investigators found the New York Prius driver avoided the brake pedal altogether when she went into a stone wall, even though she claimed she had her foot on it the entire time. If Toyota is directly to blame for either of these incidents, more evidence will need to surface.

But that doesn't mean Toyota is back on the sunny side. Let’s assume that Toyota replaces all those defective floor mats and sticky accelerator pedals, then rewrites its software for its balky antilock brakes. What can Toyota do to prevent a recurrence? 

Luckily, we’ve got a few answers. Amid all the arm-waving on Capitol Hill, some interesting details have emerged about Toyota’s dysfunctional corporate culture.

Two industry experts, David Champion of Consumer Reports and Robert Cole, a professor emeritus at the University of California-Berkeley’s Haas School of Business, helped me to assemble a list of five things Toyota can do to restore quality.

1) Stop trying to be the world’s largest automaker. If you focus all your energy on higher sales, the customer no longer comes first.

In 1998, Toyota’s then-president Hiroshi Okuda instructed his subordinates to attain a 15% share of global car sales by 2010. Okuda’s unstated goal was to make Toyota the world’s biggest car company.

Toyota pulled it off. Sales soared from 4.7 million units in 1999 to 7.8 million units a decade later, and Toyota now outsells General Motors and Volkswagen.

But the company has paid a price. Breakneck growth over-stretched the company’s engineering staff, says Cole, an expert on automotive manufacturing and an authority on Toyota’s corporate culture.

Why not simply hire more engineers? Cole says it takes a decade or so for an engineer to learn all the intricacies of Toyota’s product development and culture of teamwork. Some things can’t be rushed.

There were other problems. As Toyota grew, it lined up new suppliers around the world to provide components -- vendors who were less familiar to Toyota than the suppliers back home, which often were managed by former Toyota executives.

In a Feb. 23 article in the Harvard Business Review, Cole describes what happened next: “Relatively inexperienced Toyota managers, with greater frequency, were put in charge of supplier relations.”

Hmmm. Remember that it was an Indiana supplier, CTS Corp., that produced the sticky accelerator pedal (to Toyota's designs) that sometimes fails to return to the “idle” position.

By contrast, Toyota has experienced no problems with accelerator pedals produced by Denso Corp., a longtime member of Toyota’s keiretsu family of suppliers.

Breakneck growth creates too many temptations for an automaker to cut corners. Toyota should stop trying to be the world’s biggest car company.

2) Let independent experts study allegations that electronic malfunctions may be causing sudden acceleration.

Toyota insists that its own tests have turned up no electronic  malfunctions that would cause sudden acceleration.

The company also has refuted Prof. David Gilbert of Southern Illinois University-Carbondale, who demonstrated to ABC News how electrical problems supposedly could cause a Toyota Avalon to accelerate out of control.

And yet we have all those sudden-acceleration fatalities since 2001...  Are Toyota’s runaway cars afflicted by electronic gremlins, or by motorists who slammed the wrong pedal? We don’t know.

The usual American solution is to leave it up to the courts. Attorneys representing accident victims will call in their experts, while Toyota counters with its own engineers. And then 12 jurors with no technical expertise will do their best to sort out this nightmare.

There’s a better way. During his congressional testimony, Toyota chief engineer Takeshi Uchiyamada suggested that the company might invite the National Academies of Science to study sudden acceleration.

Good idea. The NAS doesn’t have a dog in this fight. Let them conduct an independent study.

3) Put an American executive in charge of U.S. recalls and quality.

In testimony during the congressional hearings, Jim Lentz, the president of Toyota Motor Sales U.S.A., admitted he had no authority to issue a recall. All such decisions are made in Japan.

A three-year-old memo from his predecessor, Jim Press, was even more revealing.

In 2006, Press warned his Japanese superiors that Toyota was running into trouble with U.S. safety regulators. His pleas apparently went unheard -- which is shocking.

At the time, Press was arguably the most powerful non-Japanese executive who ever worked at Toyota. His colleagues called him “the emperor” because he always got his way.

And yet his calls for help fell on deaf ears. That’s a pretty good sign that Toyota’s chain of command has calcified. “You’d get quicker action if you didn’t go through the Japan bureaucracy,” Cole says. “It would speed up the process.”

Amen. Put an American in charge of U.S. recalls.

4) Launch fewer models in your lineup. Model proliferation makes it tougher to manage quality.

As Toyota gained market share, it has fallen prey to model proliferation -- a disease that nearly killed General Motors.

In 2010, Toyota, Lexus and Scion market 28 different models, up from 23 in 2000. And if you count the hybrid variants that Toyota has introduced for a number of models, the model proliferation is even greater.

David Champion, who is senior director of Consumer Reports’ automotive test center in Connecticut, argues that Toyota’s decision to fill every product niche stretched its engineers too thin.

Champion questions whether Toyota needs a Camry, a Highlander and a Venza in its lineup. Is it really necessary to market an FJ Cruiser and a 4Runner? Does America need a Toyota Sequoia and a Toyota Land Cruiser? “Why produce both when they compete in the same market?” Champion asks.

Good question. In 2007, Consumer Reports decided it would no longer give all Toyota models a blanket endorsement. Toyota now ranks third in the magazine’s 2010 quality survey, behind Honda and Subaru.

Toyota’s models as a group are still rated “above average” in reliability.  But Consumers Reports has not restored its across-the-board endorsement of Toyota products.

At a time when many consumers are questioning the company’s commitment to quality, it would be a priceless advantage if Toyota can regain the top spot in Consumer Reports’ reliability survey.

Dump the unnecessary models. Focus your engineering talent on quality -- not quantity.

5) Design your vehicles to be panic-proof.

Last month, Toyota announced plans to install a brake override system in its vehicles.

A brake override cuts the throttle back to “idle” if the accelerator and brake are applied simultaneously. In theory, this would eliminate incidents of sudden acceleration caused by electronic defects.

Earlier this week, Mazda also announced plans to install brake overrides in all vehicles, and Transportation Secretary Ray LaHood has said he may require it.

Clearly this is an idea whose time has come. More broadly, automakers should design vehicles to be as panic-proof as possible.

Right now, the recall furor has claimed Toyota’s complete attention. In months to come, it will be interesting to see whether Toyota reverts to its bigger-is-better default mode, or whether it changes the way it does business. Keep your eye on Mister Toyoda.



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Friday, October 14, 2011

Merc CLS Shooting Brake scooped

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A lightly disguised Mercedes CLS Shooting Brake has been scooped in testing ahead of the swoopy new estate reaching UK showrooms in 12 months time.

The pictures, taken outside Mercedes’ Sindelfingen R&D and production site in Germany, are the first of the CLS Shooting Brake since Mercedes chief Dieter Zetsche confirmed it for production at Sindelfingen in 2012. A concept version, intriguingly called ‘Shooting Break’, was first seen at 2010’s Beijing motor show.

See spy pics of the Mercedes CLS Shooting Brake

The Shooting Brake is inspired by the traditional custom-built, two-door shooting brake and is Mercedes’ stylish yet practical alternative to the Audi A7 and the BMW 5-series GT. It is among a series of new design-led niche models designed to help further build the firm's image, in a range of cars that will also include a smaller CLC Shooting Brake spun off the new B-class’s MFA platform.

The front styling mirrors that of the recently introduced second-generation CLS four-door, including its gaping grille and LED headlight design. The rear of the car is unique to the standard CLS, however, featuring a heavily angled rear window, top-hinged tailgate and large, LED-enhanced tail-lights extending well into the rear wings.

Although load capacity will be increased over the standard CLS, it’s clear from the pictures that the Shooting Brake will not rival the E-class estate in this department.

Engines will mirror those in the standard CLS, including four-cylinder 2.1-litre and 3.0-litre V6 diesels, and 3.5-litre V6 and turbocharged 4.7-litre V8 petrols. A fire-breathing twin-turbo 5.5-litre V8 AMG model is also tipped for launch.

See all the latest Mercedes-Benz reviews, news and video

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