By Thibault Margaux. Engine Wiring. Publised at Wednesday, August 02nd 2017, 09:23:41 AM. "We first needed to understand how much heat was available from the powertrain during various drive cycles and cold start conditions," he says. By simulating thermal components that control the powertrain heat, such as the electronic thermostat, cooling fans, grill shutters, and water valve, they determined the best way to distribute the available energy.
By Faustine Arnaud. Engine Wiring. Publised at Saturday, December 02nd 2017, 16:32:22 PM. Even the most efficient and robust engine technologies will never make it to market without the vehicle system meeting emissions regulations. But this is not the first instance where significant emissions control advances were needed to transition a combustion technology to market. Advances in catalyst technologies more than 40 years ago were critical to meeting emerging emissions regulations; the effectiveness of catalysts for conventional spark-ignition engines has since improved by a factor of 100 while achieving a substantial reduction in expensive platinum group metals. Meeting the new challenges is a very active area of research at ORNL and other U.S. Department of Energy national laboratories, as well as in industry.
By Claudette Alice. Engine Wiring. Publised at Thursday, November 09th 2017, 17:30:15 PM. Internal combustion engine efficiency has historically been limited more by the state of technology than innovation. As an example, the potential of technologies such as gasoline direct injection were known and attempted in production more than 50 years ago, but direct injection has only become widely available in production within the last decade and now makes up approximately 38 percent of new light-duty vehicle sales. Another example is low-temperature combustion modes such as homogeneous charge compression ignition combustion—in which fuel and air are injected during the intake stroke and then compressed until the entire mixture reacts spontaneously—which were demonstrated in a laboratory more than 30 years ago but are still many years away from market introduction.
By Claudette Alice. Engine Wiring. Published at Saturday, September 02nd 2017, 07:36:31 AM. The group found that using the waste heat with optimal controls consistently delivered higher oil temperatures and significantly reduced warm-up times. This translated to fuel economy improvements of almost 4% compared to conventional thermal management strategies. The largest efficiency gains occur while heating oil from a cold start, and approximately half of the improvement comes from the powertrain and transmission sides.
By Thibault Margaux. Engine Wiring. Published at Thursday, August 31st 2017, 05:12:03 AM. A joint team from Chrysler and the Center for Automotive Research at The Ohio State University recently developed a practical approach to maximizing drivetrain efficiency and reducing fuel consumption and carbon dioxide emissions. Together, engineers in industry and research, along with students, determined how to capture and effectively distribute the useful heat energy to the transmission and engine oils from a controls standpoint, requiring additional hardware such as a transmission heat exchanger and associated plumbing, and new software. Higher temperature oil is less viscous, so less torque is required for operation and the transmission and engine can operate at higher mechanical efficiencies.
By Olivier Danielle. Engine Wiring. Published at Saturday, August 26th 2017, 23:40:52 PM. I’ve never been a car guy. I just didn’t have any interest in tooling around under the hood to figure out how my car works. Except for replacing my air filters or changing the oil every now and then, if I ever had a problem with my car, I’d just take it into the mechanic and when he came out to explain what was wrong, I nodded politely and pretended like I knew what he was talking about.
By Manon Marianne. Engine Wiring. Published at Wednesday, August 16th 2017, 19:21:58 PM. Automakers are improving fuel economy by exploiting a new controls approach that uses the waste heat from vehicle engines. Currently, up to 65% of the heat energy produced in internal combustion engines, whether gasoline or diesel, is wasted. Typically, the powertrain or engine dissipates the heat by convection, where it is carried to the cooling circuit or lost out of the tailpipe in exhaust gases.
By Marthe Mathilde. Electrical Wiring. Published at Tuesday, August 15th 2017, 16:58:02 PM. Some old homes were designed to run off less power than the modern home. Most states have a 100 amp minimum requirement. Homes running under that service could consider an upgrade to bring them to between 100 and 200 amps, which could run upwards of $2,000. Homeowners should evaluate their power demands first. “A homeowner can have an electrician test the system with an amp meter while all the big loads are on,” says Holt. “If the draw is over 75-80 percent of the service size, you might consider an upgrade. Otherwise you should be fine.”
By Marthe Mathilde. Electrical Wiring. Published at Thursday, August 10th 2017, 13:42:57 PM. specialized construction work that is performed during the erection or reconstruction of buildings or structures intended for various purposes and that entails the installation of electric wiring and electrical equipment. The electric wiring may be overhead power lines, cable lines, current leads, or interior wiring. Examples of electrical equipment include electric machinery, distribution centers, and control consoles. In the USSR, electrical installation work is usually carried out in two stages.
By Marthe Mathilde. Electrical Wiring. Published at Sunday, August 06th 2017, 09:31:46 AM. Some old homes were designed to run off less power than the modern home. Most states have a 100 amp minimum requirement. Homes running under that service could consider an upgrade to bring them to between 100 and 200 amps, which could run upwards of $2,000. Homeowners should evaluate their power demands first. “A homeowner can have an electrician test the system with an amp meter while all the big loads are on,” says Holt. “If the draw is over 75-80 percent of the service size, you might consider an upgrade. Otherwise you should be fine.”
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