Automotive engine turbocharger mainly by the turbine hood, gas masks and pressurized shell and other components.

Exhaust gas turbo is the use of diesel engine to discharge the energy to drive the turbine, thus driving the compressor, to increase the intake pressure to increase the amount of inflation. Increasing the intake air pressure of the engine is mainly achieved by a radial runner turbocharger mounted on the engine. When the engine is running, the exhaust gas exhausted by the engine flows through the power of the turbine, forcing the turbine wheel to rotate at high speed. Because the turbine impeller and the compressor impeller on the same axis, so the turbine wheel at high speed rotation, but also to promote the compressor wheel to do the appropriate adjustment of rotation, so that through the compressor air velocity and pressure increase. And because the compressor outlet is connected with the engine intake manifold, so that after the pressurized air, it can smoothly enter the engine combustion chamber for fuel combustion.

Oil turbine turbocharger can not only improve the power, but also reduce the unit power quality, reduce the overall size, reduce fuel consumption.

1, the advantages of exhaust gas turbo

1.1 supercharger and engine only gas pipeline connection without mechanical transmission, so the supercharging mode is simple, do not need to consume power.

1.2 In the case of engine weight and volume increase is very small, the engine structure without major changes, it is easy to improve the power of 20% -50%.

1.3 due to exhaust turbocharged recovery of part of the energy, so the engine economy after booster has improved significantly, coupled with the relative reduction in mechanical losses and heat loss, improve the engine’s mechanical efficiency and thermal efficiency, the engine turbocharged Fuel consumption can reduce the consumption rate of 5% -10%.

1.4 turbocharged engine on the altitude changes have a strong ability to adapt, so equipped with exhaust turbocharged car in the plateau region has obvious advantages.

2, exhaust turbocharger in use should pay attention to what:

2.1 turbocharger rotor shaft speed up to 80000-100000r / min, if the general use of machinery bearings will not work properly. Therefore, the supercharger generally use full floating bearings. All the floating bearing and the rotor shaft and the shell bearing between the gap, when the rotor shaft high-speed rotation, with 0.25-0.4Mpa pressure of the oil filled the two gaps, so that the floating bearing in the inner and outer oil film with the rotor shaft But the rotational speed of the bearing is much lower than that of the rotor shaft, so that the relative linear velocity of the bearing relative to the bearing hole and the rotor shaft is greatly reduced. Due to the double layer of oil film, you can double the cooling, and produce double damping. It can be seen, the floating bearing with high-speed light load under the work of reliable, but also found that floating bearings on the oil requirements are high. It is important to note that the lubricating oil is filled with the required grade.

2.2 The lubricating oil used must be clean, otherwise it will accelerate the bearing wear, and even lead to supercharger and engine performance deterioration. Therefore, must be strictly in accordance with the provisions of maintenance, regular cleaning oil filter filter. 15000km run-in period to replace the oil and filter, after each 10,000km replacement oil.

2.3 should be regularly cleaned according to the provisions of the maintenance of the North Pancheng v3 accessories air filter, every two years to replace the air filter filter or on a regular basis to change the mileage. Always check the tightness of the intake and exhaust systems during use.

2.4 In order to ensure the lubrication of the floating bearing, the engine should start at idle for a few minutes (at least 30s), because the oil pressure and oil circulation to the floating bearing takes some time, otherwise the lubrication conditions of floating bearings can not be guaranteed Bearing wear, or even stuck failure. The same is true of the shutdown, and gradually reduce the load until the idle operation of a few minutes before stopping.

2.5 turbocharger in the use of 2000-2500h, the engine should not disassemble the state of the rotor shaft to measure the amount of movement. Before the measurement should be into the exhaust pipe removed from the supercharger, the micrometer contacts on the rotor shaft, and then push the impeller to measure the amount of movement should be 0.10-0.30mm. If the tolerance should be removed supercharger overhaul, or replace the supercharger.

2.6 supercharger is a precision components, such as the need to break down, must be strictly in accordance with the instructions, as much as possible familiar with its structure, should not be split. Supercharger rotating parts are subject to the overall balance test, decomposition should be marked, so as not to damage the original assembly when the dynamic balance.

2.7 After the decomposition of the supercharger also need to check the rotor shaft axial movement and radial clearance.

3, exhaust turbocharger common faults and exclusion:

3.1 turbocharger rotor shaft stuck die rotor caused by the reasons are:

(1) oil pressure is low.

(2) North Ben v3 accessories supercharger inlet pipe joints loose, oil spills, resulting in rotor shaft and bushing lack of oil stuck. Should be tightened card sets, pipe fittings screw sets.

(3) oil is not clean clogged bushing oil hole. Replace oil, clean or replace oil filter.

(4) A sudden acceleration of the engine’s cold start causes the oil to leak the liner. Should be idle after a few minutes to accelerate.

(5) the engine often emergency start and emergency stop. In the start and stop process, should run idle for a few minutes, and then gradually increase or decrease the load.

3.2 turbocharger black smoke

Turbochargers are often associated with lubrication;

(1) rotor shaft and bushing gap is too large, osmotic oil. Should repair the supercharger, replace the bushing.

(2) North Ben v3 accessories supercharger oil return pipe wall plug, oil into the turbine from the exhaust pipe discharge. Clean the supercharger return line and replace the rubber sleeve if necessary.

(3) supercharger oil into the oil pipe joint oil spill. Should be tightened joints to prevent penetration.

3.3 turbocharger low speed, the engine power less than black smoke

The occurrence of such phenomena should be repaired when the supercharger exhaust valve, specifically:

(1) Turbine or impeller is damaged, replace the turbine or impeller.

(2) exhaust release valve diaphragm rupture, replace the diaphragm.

(3) Exhaust vent valve spring failure, replace the spring.

(4) check the northbound v3 accessories intercooler.

3.4 supercharger high speed, pressure ratio caused by heavy engine work

Found that the rough work of the engine after the operation to start the supercharger exhaust valve, adjust the spring preload, specifically the following two points:

(1) exhaust vent valve hose damage. Replace the silicone rubber tube.

(2) Turbine shell side ventilation hole hole plug, clear dirt.