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Years ago, vehicles were equipped with carburetors and required a longer cranking time to start. In many instances this longer cranking time would reveal a weak battery. You could actually hear the cranking power reduced especially in cold weather. When fuel-injected engines became the norm this was not as evident due to the fact that the vehicle starts up quicker.
A sudden change in temperature usually takes a weak battery out. That’s why the day before your vehicle may have started fine, with no warning of a problem. Then an extreme change in the weather (hot or cold) causes the weak battery to die, seemingly without a warning.
Why do batteries fail?
It’s unusual for a battery to malfunction because of a defect, driving habits are the usual cause. Using a lot of vehicle accessories and driving short distances prevents the battery from fully charging. Extended idling with heavy accessory use or driving a short distance only once a week can also reduce battery performance.
(example from General Motors)
When the battery does not have have an opportunity to charge fully, acid stratification occurs. The electrolyte (battery acid) in a stratified battery concentrates on the bottom. It is similar to the way sugar granules collect on the bottom of a cup of coffee before it is stirred. Batteries tend to stratify if kept at low charge (below 80%) and don’t get the opportunity to receive a full charge. For example, short distance driving while running windshield wipers and electric heaters contributes to acid stratification. Acid stratification reduces the overall performance and life of the battery.
How to protect the battery
Check your battery every two years and keep the connections clean. Also clean the area around the battery hold down. Usually if a battery is super corroded the terminals leads are no longer airtight. If you clean your battery terminals and cables and the corrosion returns, replace the battery. If your battery is four years old and corroded, replace the battery.
Batteries can cause all kinds of crazy problems; the vehicle’s electrical system has to be 100%. I have seen people replace parts on vehicles when the only thing wrong was a weak battery.
Just recently I checked a friend’s car and found a dead battery. I explained the battery read 12.5v but would not start the vehicle. He came back and told us the battery was okay. I asked the gentleman if he load tested it. He had not, but when he did he came back with a new battery.
Batteries can be difficult to diagnose, if your battery is more than three years old, my suggestion is to replace it. If you are seeing excessive corrosion and have had problems don’t fool around with an old battery. Have it checked out.
Battery Basics
Typical automotive batteries are made of five basic components:
Battery cutaway images courtesy of Battery Council International
Keep your vehicle running smoothly with maintenance schedules, service and repair information, Technical Service Bulletins and Recalls at: ChiltonDIY.com and ChiltonPRO.com.
By Jim Marotta
At 100 horsepower per liter, GM’s newer turbocharged 1.4L has the power of a larger engine but retains the efficiency of a small-displacement four-cylinder in most driving conditions. Courtesy GM
A naturally aspirated automobile engine uses the downward stroke of a piston to create an area of low pressure in order to draw air into the cylinder through the intake valves. Because the pressure in the atmosphere is no more than 14.7 psi, there is a limit to the amount of airflow entering the combustion chamber.
A turbocharged engine uses a radial fan pump driven by the engine’s exhaust that consists of a turbine and a compressor on a shared shaft. The turbine converts exhaust gases exiting the engine into rotational force, which is used to drive a compressor which draws in ambient air and pumps it at high pressure into the intake manifold to improve the engine’s volumetric efficiency. This results in a greater mass of air entering the cylinders on each intake stroke.
There are four main components to a turbocharger: the housing, the impeller/turbine wheels, the center hub and the bypass.
The size and shape of the housings fitted around the impeller and turbine affect performance, response, and efficiency. Courtesy Borg-Warner
The size and shape of the housings fitted around the impeller and turbine dictate the performance characteristics of the overall turbocharger. This allows the designer of the engine system to tailor the compromises between performance, response, and efficiency to application or preference.
The impeller and turbine wheel sizes also dictate the amount of air or exhaust that can be flowed through the system. Generally, the larger the turbine and compressor wheels, the larger the flow capacity. The shape, curvature and number of blades on the wheels allow infinite variability in design to tailor a turbocharger to a given engine.
Water-cooled bearings, such as the one shown, allow engine coolant to keep the lubricating oil cooler, avoiding possible oil coking from the extreme heat found in the turbine. Courtesy Borg-Warner
The center hub connects the compressor impeller and turbine and uses a bearing lubricated by a constant supply of pressurized engine oil. While the engine oil cools some systems, the preferred method is to use engine coolant to keep the lubricating oil cooler, avoiding possible oil coking from the extreme heat found in the turbine.
Turbos use a bypass or wastegate to prevent over-pressurizing the system. At a specific boost pressure, a bypass feeds part of the exhaust gas flow around the turbine. The wastegate which opens or closes the bypass is usually operated by a spring-loaded diaphragm in response to the boost pressure.
There are several tips to maintaining and servicing turbochargers:
Planning to service or repair your vehicle? Chilton can help! Access procedures, specifications, tips, and more at http://www.ChiltonDIY.com/.
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A muscle car enthusiast and drag racer, Jim Marotta is a freelance automotive writer with more than 20 years experience in the automotive industry. |
Undoubtedly, the transcontinental record posted last year will not stand for long, as there are probably teams of people right now plotting their strategy to traverse the country in less time. They will certainly achieve this with new routes, higher speeds, and/or better luck. Throughout the history of transcontinental travel, the limitations on closing the time gap was technology and the infrastructure: Wagons, trains, motorcycles, and cars traveled across everything from the barren wastelands of the Southwest to pristine asphalt freshly laid west.
The very nature of the automobile and railroad industry may change the environment of future attempts, as technology and the imagination of engineers and scientists endeavor to create safe, faster, and better travel. Autonomous vehicles, magnetic levitating (Maglev) bullet trains, and commercial airplanes complete with auto pilot, are the future. Imagine riding in a car that is capable of sensing its environment and navigating without human input; what’s more, imagine being surrounded by like vehicles. Perhaps the highways of the near future will be dominated by such cars and trucks that can run at high speeds for long durations in close formations, hampered neither by traffic, speed laws, or fuel constraints.
2016 Mercedes S Class autonomous features
For example, the 2016 Mercedes S-Class has options for autonomous steering, lane maintaining functions, acceleration/braking, parking, accident avoidance, and driver fatigue detection, in both city traffic and highway speeds of up to 124 mph. With adaptive cruise control (monitors distances to adjacent vehicles in the same lane, adjusting the speed with the flow of traffic) it has the earmarks of a completely autonomous vehicle.
Google’s self-driving car project
Not to be outdone by Mercedes, Audi and BMW have done extensive research on self-driving cars, but nothing like what Google has been working on. Sebastian Thrun is head of Google’s Self-Driving Car project at Google X (its experimental branch). Working on legislation passed in four states and Washington D.C. to allow driverless cars, Thrun’s team, along with Toyota, modified a Prius with driverless technology. In May 2012, it was the first such car to obtain a license for an autonomous car.
By 2020, Google plans to offer its version of a driverless car (it has no pedals nor a steering wheel) to the public. As of September 2015, Google’s fleet of experimental prototypes have traveled nearly 1.3 million miles of public roads (with only 14 minor traffic accidents).
Highways of the Future
Smart Highway by Daan Roosegaarde
Imagine a highway not dotted with road signs or streetlights, but brightly lit and well annotated. The lines on the road itself glows, and the road signs appear on a monitor inside the cabin of your car (or not at all; the car’s computer knows where it is and where it is going so you don’t have to). Sounds a little far fetched, but right now there are about three miles of Highway N329 outside of Amsterdam that use glowing green paint to mark the lanes. Developed by Daan Roosegaarde, the paint glows indefinitely, and he has big ideas to make it able to change colors depending on road conditions.
Solar Roadways
In Sandpoint, Idaho, Solar Roadways, owned by Scott and Julie Brusaw, has developed interconnected road panels to form a “smart” highway. Harnessing the power everywhere there are roads, can power lights, signs, and even electric cars using the roads themselves. In addition to the potential to power nearby homes, businesses, and electric vehicles, the panels also have heating elements for convenient snow and ice removal, as well as LEDs that can make road signage.
Take the Train
Japan’s high speed rail line
For years, countries like Japan and England/France have utilized high-speed rail in their countries. Japan’s Shinkansen line is the world’s busiest high-speed line, carrying nearly 151 million passengers a year between Tokyo and Osaka, while China’s high-speed system ferries over 370 million annually. Though they travel at approximately 150mph, this is by conventional railway trains (steel rails and a wheeled trains), but the future is Maglev train systems that travel on superconducting magnets that not only drive the train forward at incredible speeds but keep it planted on the tracks. In 2009, the Maglev Technological Practicality Evaluation Committee under the Japanese Ministry of Land, Infrastructure, Transport and Tourism deemed the SCMaglev system ready for commercial operation. In 2003, the Maglev train with three passenger cars (unoccupied) set the land speed record for railed vehicles at 361.0 mph. Completed systems will be online by 2027 in Japan, and at that rate, one could travel from New York to Los Angeles in 6.7 hours.
Beyond the Wheel
With cars communicating with each other along the highways, dangers ahead can be shared among the cars on the road. The speeds can increase, the distance between cars can decrease, and accidents can become nearly a thing of the past. As many automakers have shown, a computer is much quicker than any human in detecting a situation, deciding on what course of action to take, and taking that action. A deer crossing the road can be detected by a computer in pitch black darkness hundreds of feet away and a solution formatted long before the deer knows there’s a car approaching.
Production cars today are capable of sub-200 mph speeds; now imagine those speeds with the confidence of a well-engineered road and a computer at the helm, the time it would take to travel from New York to Los Angeles would be just over 12 hours.
The Transcontinental Record?
It is hard to say what the future holds, but one thing is clear: As long as there is a record on the books, someone, somewhere will try to break it. After all, when the first person set foot on this continent, negotiating a path to the other side was made impossible only by his or her own limitations.
The quickest way from the East to the West Coast was via Clipper ship around The Horn, taking about 150 days. By land, that time was nearly six months. Today, it is five hours by plane and, now, only 28 hours by car.
What will the record be in another 10 years? Twenty? And will it have been made by a human driving a car or a car driving the human? If it is the latter, will it still be a record?
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