In winter, because of the relatively cold temperatures, it is difficult to start up the bulk feed trucks under low temperature conditions. At low temperatures, the flow properties of lubricating oils are degraded, the frictional resistance of various parts of the bulk feed truck increases, and the like. This causes the vehicle's engine start-up fuel consumption to increase, start-up difficulties, power decline, and each Wear between parts increases. So how should we start the bulk feed truck in the early winter?
The most commonly used startup method in recent years is a method called low temperature assisted starting. The fuel heater heating system, that is, the pump that comes with the fuel heater, pumps out the coolant from the engine. After the fuel heater is heated, the input of the cycle is returned to the body of the engine and heating starts. However, this heating method may take a long time, but it can heat the engine oil and the temperature of the engine, thereby improving the viscosity reduction of the oil at a low temperature, and the like, so that the engine can start well.
Therefore, the driver of the bulk feed carrier will say, then I can add cold starter, but we do not recommend such a method, the cold start page is made of low volatile carbon oxides and additives The oil is composed of oil, which can make the diesel engine start at a low temperature immediately. It can increase the engine's work and allow it to run at a high speed. However, due to the relatively low temperature of the oil and the lubrication conditions It is rather harsh, which leads to the formation of dry friction prior to the operation of the various parts of the generator, resulting in increased wear of various components. If this method is used as a last resort, then the amount injected must not be too large.
Using the flame preheating electronic control system, the working procedure of this method is to turn on the starter after the glow plug is heated, the solenoid valve automatically opens the oil circuit, and the fuel is supplied to the glow plug through the fuel pipe, and then start up. This startup method is the same as the startup mode of the start page. After starting the engine, it will cause the various parts of the engine to increase the degree of wear, and after successfully starting the engine, it will not be able to step on the accelerator much. This will Makes the engine run faster. (Text / Sun Ni)
LED Packages
LED (semiconductor light-emitting diode) packaging refers to the packaging of light-emitting chips, which is quite different from integrated circuit packaging. The packaging of the LED is not only required to be able to protect the wick, but also to be able to transmit light. Therefore, LED packaging has special requirements for packaging materials.
- outline
Generally speaking, the function of the package is to provide sufficient protection for the chip to prevent long-term exposure or mechanical damage to the chip in the air to improve the stability of the chip; for the LED package, it also needs to have good light extraction efficiency and good heat dissipation. , A good package can make the LED have better luminous efficiency and heat dissipation environment, and then improve the life of the LED.
- Technology Introduction
1. Expand the crystal, open the densely arranged chips a little bit to facilitate the crystal bonding.
2. Die-bonding, point conductive/non-conductive glue on the bottom of the holder (conductivity depends on whether the chip is a top-bottom PN junction or a left-right PN junction) and then put the chip into the holder.
3. Short bake, so that the chip does not move when the glue cures the bonding wire.
4. Wire bonding, use gold wire to connect the chip and the support.
5. Pre-test, preliminary test whether it can be bright.
6. Fill the glue and wrap the chip and the bracket with glue.
7. Bake for a long time to allow the glue to solidify.
8. Post-test, test whether it can be bright or not and whether the electrical parameters meet the standard.
9. Light and color separation to separate products with roughly the same color and voltage.
10. Packaging.
Led Packages,White Led Package,Useful Led Package,Custom Ceramic Substrate
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