By Elvire Fernande. Engine Wiring. Publised at Sunday, October 01st 2017, 03:36:53 AM. The push toward higher-efficiency engines will alter exhaust temperatures and chemistry and may create challenges for emission control technologies. For example, new higher-efficiency engines will have lower exhaust temperatures, due to more efficient work extraction at the piston. Lower exhaust temperatures will, in turn, require the development of new emission control technologies, which must not only be effective at low temperatures but also must survive high exhaust temperatures encountered under high load conditions.
By Marthe Mathilde. Engine Wiring. Published at Tuesday, January 23rd 2018, 01:43:28 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 Thibault Margaux. Engine Wiring. Published at Sunday, January 21st 2018, 07:13:22 AM. Gasoline compression ignition combustion is an advanced combustion mode that has received considerable attention in recent years. While GCI combustion is not a new concept, it has evolved over the past several decades as technologies improve. Earlier GCI research was focused primarily on homogeneous charge compression ignition combustion, but in recent years, we have seen increasing interest in a continuous range of GCI combustion modes spanning fully homogeneous HCCI to partial fuel stratification modes to full stratification modes which are diesel-like in execution. These technologies have also led to a strong interest in reactivity controlled compression ignition combustion (RCCI), which makes use of the differences in reactivity of two fuels to manage the combustion process for maximum efficiency with lowest possible emissions.
By Olivier Danielle. Electrical Wiring. Published at Saturday, January 20th 2018, 23:55:01 PM. Carefully tuck the wires into the box. Install the box cover, securing it with two screws. The cover must be a solid "blank" without holes. Restore power to the circuit by switching on the circuit breaker.
By Claudette Alice. Electrical Wiring. Published at Friday, January 19th 2018, 18:05:34 PM. “Anywhere there is the chance of contact with water or the ground, there should be a GFCI,” says Brett Brenner, president of the Electrical Safety Foundation International (ESFI). “It’s estimated that GFCIs accounted for roughly a 70 percent reduction in electrocutions,” he says. GFCIs are also available as circuit breakers installed in the panel, giving ground fault protection to designated circuits in the home.
By Thibault Margaux. Electrical Wiring. Published at Thursday, January 18th 2018, 15:49:48 PM. Arc fault circuit interrupters (AFCIs) protect a home against electrical fires. ACFIs protect against fire-causing arcing much like GFCI’s protect against stray current. When an arc is detected, power to the circuit is interrupted. Arcing can be caused by any number of factors, including damaged or worn wires, incorrect wiring, and loose or wet connections. Newer AFCIs are able to distinguish between dangerous arc faults and normal arcing caused by fluorescent lighting and some dimmers and switches.
By Manon Marianne. Electrical Wiring. Published at Monday, January 15th 2018, 12:25:20 PM. Join the bare copper (or green insulated) ground wires together first. If the box is metal, add a pigtail—a 6-inch length of the same type of ground wire—to the ground wire connection, then connect the loose end of the pigtail to the ground screw on the box. Join the white (neutral) wires together, then join the black (hot) wires together. If there are red (hot) wires, join them together. Confirm that all wires are secure by gently tugging on each wire.
By Manon Marianne. Electrical Wiring. Published at Sunday, January 14th 2018, 11:58:34 AM. Turn off the power to the circuit you'll be working on by switching off the appropriate circuit breaker in your home's service panel (breaker box). Test all of the wires you'll be working on with a non-contact voltage tester. The test should confirm that no voltage is present in any of the wires.
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