Automotive ignition high-voltage wires

Search technical information on high-wires the ignition system, even in specialized publications - no easy task. However, a condition in which they are located, is critical for engine operation and its characteristics. What problems might face the motorist? This can be seen from the article about high-wire car ignition. Device and function. Automotive high-voltage wires (BB-wire) ignition system transmits electrical pulses of high voltage between the coil and spark plugs. They fall into two categories: ordinary and special. Usually have a metallic central conductor. They are covered with insulation of PVC, rubber, polyethylene, and a special envelope in order to increase their gas-oil resistant. Resistance of HV cables is quite low, about 18-19 ohms / km. They withstand voltage of 15-25 kV, and for their proper functioning requires resistors to suppress interference. Special HV cables have a more complex design and distributed parameters, which suppress interference. They consist of wires (for example, spiral), braids, which are made from different materials (cotton, linen, nylon, etc.), impregnation (graphite, ferroplastovye, manganese - nickel, nickel - zinc and others), and other components. Widespread special BB-wire, whose insulator is made of silicone-based. These wires have a high elasticity even at low temperatures, and withstand even the strongest inflection points. They do not overheat and do not dampen. Go to the ends of the wires by crimping or soldering attach electrical contacts and protective caps. Last prevent contact wires from the influence of the environment and prevent leakage of electrical current. To this end caps to ensure maximum sealing electrical connections against dust and moisture, while maintaining the flexibility to change them without any problems, regardless of temperature. Signs of problems include automotive high-voltage ignition cables. Problems when starting the engine. Often occurs in wet weather. At medium and high speed of the engine failures occur. If the central wire is damaged, the engine stalls. Power of the engine is reduced. Fuel consumption goes up. Even if the ignition is skipped, the signal is triggered "check engine". Cause. As time wears an insulator and covered with microcracks (in insulators made of plastic, silicone or rubber), to which the fault - the temperature drop in the engine compartment. Because of microcracks insulator no longer prevents the leakage of electrical current and plugs do not get the amount of electricity work. If a portion of electricity is simply not enough, the voltage decreases. If the candles do not receive an electric pulse, the time of formation of sparks increases significantly. In the case where the cables and protective caps accumulated dirt, which increases the surface conductivity of insulation, leakage of electric current increases. Leakage current is possible and the oxidation of electrical contacts when the protective cap unsealed, or if damaged wires when they fray with the other components of the engine compartment (for example, incorrect installation of additional equipment). Diagnosis. To test the automobile BB-ignition cables, you need first of all include the engine and open the hood in the dark. Leak electric current glow blue. Another way to diagnose wiring - control of energy candles. To do this, instead of candles to the wires needed to connect the spark gap, and the starter crank scrolls. If there is leakage current, or in the secondary circuit is great resistance, which appears spark seems pale and thin. It should be remembered that the vehicles equipped with catalysts, the fuel supply must be disconnected. Sam gap consists of two electrodes in an insulated housing, which are at a distance of 7 mm from each other. If it is good to fix the tip of the wire at some distance from the metal engine parts, it is possible to simulate the gap. However, accurate results can be achieved only with the technical diagnosis of equipment in the workshop. It should be noted that some car-wire explosives imported have high flow resistance. Such resistance, if it is not provided in the ignition system, leading to such consequences as a misfire. Maintenance and repair. To BB-ignition wire served long to keep them clean and dry. Amongst the wires, with a special detergent composition to wipe the lid dispenser, insulators and spark ignition coil. With a good contact at the ends of the wires to the spark pulse energy is not lost. To maintain good contact, it is necessary from time to time to check, whether well sit on the tips of the elements of the ignition system and spark. During the dismantling of automotive high-voltage wires, they should not pull out, and gently lift, holding his cap. Caps should fit snugly to the contact pairs, and in case of damage or cracking immediately replaced. If depressurization of protective caps oxidation of electrical contacts is greatly increased. Damaged car high ignition wires can fix it. When buying new wires should be considered material production and value of the voltage in the ignition system. If the voltage is maximum, then the possibility of breakdown of the wires is greatly reduced. Recommended to choose a wire made of elastic material (for example, silicone) to withstand the swings high and low temperatures in the engine compartment. Availability of warranty on the HE-wire can save you from buying substandard products.