An increase in the compression ratio results in excessive pressure in the cylinder, which prevents the gasoline from being injected into the combustion chamber. In this case, high-pressure gasoline pumps and high-pressure screw injectors must be used. Usually, the pressure of the GDI engine's fuel supply system can be increased. Reaching 50.Okg/cm arts or more, it is much higher than the average engine of the normal intake port injection. The GDI engine is also not quite the same as the general engine in the intake section. To control the flow path of the intake air flow, the GDI engine adopts a vertical intake port and a concave bowl top piston. This kind of match is mainly to achieve layered lean combustion to save energy. The basic principle of the fuel is to use the special shape of the concave bowl top piston and the high pressure screw injector to control the rich oil and gas around the spark plug ignition point. Therefore, even if the air/fuel ratio of the mixture is as low as 40:1, GDI The engine can still operate smoothly and produce the same motivation. The GDI engine has greatly increased its oil supply pressure and compression ratio. Therefore, more robust and durable materials are used for all engine parts. Since GDI in-cylinder direct injection is performed only when the engine compression stroke is not completed, the ignition timing needs to be more accurate than the intake port injection. Therefore, the high-precision computer ECU is also very important when designing the engine. One ring. Layered lean combustion technology is to overcome the slow combustion of the port injection engine and incomplete combustion. After years of research and development, the existing direct injection system can only be done around the spark plug. Mixed oil and gas, the rest of the combustion chamber is completely air, so it can significantly increase the limit of lean combustion to air-fuel ratio below 40:1, so the fuel consumption is certainly a lot lower than the average engine.

How the GDI engine outputs high horsepower We know that naturally aspirated engine modifications must do two things: increase the compression ratio and the intake and exhaust, which is why the GDI engine can provide high output because the high compression ratio is inherently the GDI engine. Inherent, and the high inertia air flow caused by the vertical high-efficiency air intake can also promote more rapid air flow into the combustion chamber. When the piston reaches the bottom dead point, air forms a rolling air current in the cylinder. The piston is in compression stroke. The fuel is sprayed in a cylindrical shape toward the curved groove above the piston on the top of the bowl, causing high concentrations of oil and gas to accumulate around the spark plug. When the piston reaches top dead center. Spark plugs ignite mixed oil and gas. High-inertia air flow caused by the vertical high-efficiency intake port. When the GDI engine is operating, the ultra-lean combustion mode is usually used at a low speed and the high-power mode is used at a high speed. High-injection mode fuel injection time and ultra-lean combustion fuel injection time are completely different. When the GDI engine is in the ultra-lean combustion mode, the fuel injection action is in the compression stroke, and the fuel injector is directly sprayed with high-density live fuel. The top surface of the bowl is curved so that the layered combustion is achieved around the spark plug ignition point. In the high output mode, the fuel injection is performed during the intake stroke. The oil and gas are the same as the normal intake engine. It is in a homogeneous state to improve the combustion efficiency, and uses oil and gas to reduce the cylinder temperature.

Ultra-lean combustion mode is usually used at low speed and high output mode is used at high speed. As long as it is internal combustion, both the volumetric efficiency and the engine temperature can improve its performance. The GDI engine is just enough for both. Since the gasoline is not mixed with air before entering the cylinder, the air intake density can be increased. On the other hand, GDI engine can absorb a large amount of heat after gasoline is sprayed in the cylinder, so it can also effectively reduce the temperature in the cylinder, suppress the generation of knock and increase the density of the mixture; therefore With two advantages of engine operation, the GDI engine can easily achieve high output goals. Experiments show that the direct injection engine in the cylinder is about 10% higher than the inlet injection engine and the horsepower is also 10% higher.

Drilling Bit

WHAT ARE TRICONE DRILL BITS USED FOR?

Tricone bits, first created during the Great Depression, represented a significant leap forward in drilling technology. Tricone drill bits are the go-to solution for almost any well digging, from everything to simple water wells to industrial scale oil extraction. Tricone bits come in several different varieties, and can deal with a wide range of different rock formations. Most tricone bits are either Mill Tooth bits, or TCI bits (TCI stands for Tugnsten Carbide Insert), and there is an ideal tricone bit for soft, medium, or hard rock formations. It is important to know the type of formation you are drilling in when selecting a drill bit.

TRICONE DRILL BITS FOR SOFT ROCK FORMATIONS

Soft rock formations consist mainly of sand, clay, limestone or shale and are ideal for drilling with Mill Tooth Tricone bits. When working with soft formations you can use either sealed bearing or open bearing mill tooth tricone bits, depending on the scope and duration of your project. Sealed bearing tricone bits are longer lasting, but generally more expensive due to the precision work required to protect the bearings. Open bearing bits, on the other hand, are not as well protected and will wear out more quickly, however they are cheaper to manufacture. Tricone bits designed for soft rock generally have longer protruding teeth, [A" shaped teeth, or chisel shaped buttons. In all cases the teeth will be more widely spaced for tricone bits that are designed with soft formations in mind.

TRICONE BITS FOR MEDIUM ROCK FORMATIONS

If you`re drilling in calcites, dolomites, hard limestones, and some hard shale you`ll need a tricone bit designed for medium rock formations. You may want a TCI Tricone bit. To better understand why tungsten carbide is ideal it`s useful to know about its properties. First discovered in 1927, Tungsten carbide is an exceptionally strong and hard material, this allows it to withstand higher speeds for more rapid drilling. Additionally tricone TCI bits are much more capable at absorbing the significant amounts of heat generated without damaging the tricone drill bit. Medium formation bits have teeth that are far closer together than what you see with soft formation drill bits. Additionally the teeth are less protruding, although they may still come in a similar range of shapes.

TRICONE BITS FOR HARD ROCK FORMATIONS

Hard rock formations are hard and abrasive formations usually made up of hard shale, calcites, mudstones, chert, pyrite, granite, quartzite, and cherty lime stones. The difficulties of drilling in this material make a TCI tricone bit all but mandatory. The exceptional hardness and strength of TCI [buttons" for the drill bits allow them to endure very difficult drilling conditions. As with all tricone bits there is an option between sealed bearing and open bearing. Sealed bearing bits are considerably more protected from wear and tear and therefore suitable for much more use before being replaced. Gauge protection can also significantly increase the lifespan of a tricone drill bit. Bits designed for hard formations continue the trend of less protruding teeth placed closer together. The teeth will be very short and placed very closely together. This results in a much slower drilling speed than you would get with medium or soft formation drill bits, however if you are drilling through hard rock strata you don`t have much choice.

TRICONE BITS ARE IDEAL FOR SOFT, MEDIUM, AND HARD FORMATIONS.

Hopefully the above information has given you an idea of which tricone bit is ideal for the various rock formations you may have to contend with. For particularly advanced or ambitious projects you will want to carefully consider the type of tooth, additional kinds of seals, the importance of gauge protection, and estimated duration of the project in addition to the rock formation.

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