By Thibault Margaux. Engine Wiring. Publised at Wednesday, August 02nd 2017, 09:23:41 AM. 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 Faustine Arnaud. Engine Wiring. Publised at Saturday, December 02nd 2017, 16:32:22 PM. From my position at Oak Ridge National Laboratory, I have been able to see the intersection of knowledge discovery, advanced engine and vehicle technology development, and the use of one-of-a-kind computing resources. Although the public tends to think of automobile and engine research as a purely private-sector concern, my colleagues and I at ORNL are helping to realize the full efficiency potential of internal combustion engines.
By Claudette Alice. Engine Wiring. Publised at Thursday, November 09th 2017, 17:30:15 PM. Pistons move up and down the cylinder. They look like upside down soup cans. When fuel ignites in the combustion chamber, the force pushes the piston downward, which in turn moves the crankshaft (see below). The piston attaches to the crankshaft via a connecting rod, aka the con rod. It connects to the connecting rod via a piston pin, and the connecting rod connects to the crankshaft via a connecting rod bearing.
By Faustine Arnaud. Electrical Wiring. Published at Friday, October 27th 2017, 16:08:15 PM. One of the main trends in the further industrialization of electrical installation work is the use of large-scale electrical engineering facilities, for example, the rooms of electric-drive control stations and of urban transformer substations. Such facilities are delivered by industry with the electrical equipment completely installed and adjusted. In this case, electrical installation work is reduced to the installation of such facilities and the connection of the facilities to external power networks.
By Marthe Mathilde. Engine Wiring. Published at Monday, October 23rd 2017, 10:50:45 AM. On the top of the piston, you’ll find three or four grooves cast into the metal. Inside the grooves piston rings are put in. The piston rings are the part that actually touch the walls of the cylinder. They are made from iron and come in two varieties: compression rings and oil rings. The compression rings are the top rings and they press outward on the walls of the cylinder to provide a strong seal for the combustion chamber. The oil ring is the bottom ring on a piston and it prevents oil from the crankcase from seeping into the combustion chamber. It also wipes excess oil down the cylinder walls and back into the crankcase.
By Faustine Arnaud. Electrical Wiring. Published at Sunday, October 22nd 2017, 07:49:09 AM. The long thick cables of transmission lines are made of copper or aluminum because theyhave a low resistance.
By Faustine Arnaud. Electrical Wiring. Published at Sunday, October 15th 2017, 07:16:21 AM. After electricity is produced at power plants is has to get to the customers that usethe electricity. Our cities, towns, states and the entire country are crisis-crossed withpower lines that ³carry´ the electricity. As large generators spin, they produce electricitywith a voltage of about 25,000 volts. A volt is a measurement of electromotive force inelectricity. The electricity first goes to a transformer at the power plant that boosts thevoltage up to 400,000 volts. When electricity travels long distances it is better to have itat higher voltages "more efficiently at high voltages".
By Thibault Margaux. Electrical Wiring. Published at Monday, October 09th 2017, 05:17:57 AM. A home’s electrical system is prone to wear and tear. Regular testing and evaluation of receptacles, switches, and breakers can prevent dangerous situations down the road. There are two electrical upgrades that should be installed to protect your home: ground fault circuit interrupters (GFCIs) and arc fault circuit interrupters (AFCIs). GFCIs protect against electrical shock caused by ground faults or leaking electrical current. These devices monitor the current in a circuit and interrupt or stop the flow of power to that circuit if a spike or loss of power is detected. In new construction, GFCI receptacles are required by code in bathrooms, kitchens, and garages, on outdoor outlets, and in crawl spaces or unfinished basements.
By Elvire Fernande. Engine Wiring. Published at Thursday, October 05th 2017, 20:33:48 PM. Low-temperature combustion processes are of significant interest due to very high thermal efficiencies with significant reductions in many criteria pollutants. As mentioned above, LTC has been a challenge due to the state of technology: unlike conventional spark-ignition and compression-ignition combustion modes, most LTC modes are kinetically controlled and hence much more sensitive to environmental conditions and ever-changing speed/load demands. Recent advances in enabling technologies such as fuel injection systems, turbomachinery, valve actuation, sensors, and onboard computers have led to new real-time control opportunities which are enabling the potential of LTC engines with production-viable hardware.
By Claudette Alice. Engine Wiring. Published at Monday, October 02nd 2017, 16:22:50 PM. It wouldn’t be until 1860 that a reliable, working internal combustion engine would be invented. A Belgian fellow by the name of Jean Joseph Etienne Lenoir patented an engine that injected natural gas into a cylinder, which was subsequently ignited by a permanent flame near the cylinder. It worked similarly to the gunpowder atmospheric engine, but not too efficiently.
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