1,When turbocharged diesel engine vehicle after a failure in the turbocharger, supercharger can tear down, the engine continues to run?
A: As a contingency measure in the car driving on the way, the turbocharger failure can not be immediately removed turbocharger repair, the vehicle towards the nearest
FAW Service Station, take measures to exclude the turbocharger failure. Because, when removed after the turbocharger, the engine power performance will inevitably decline,
fuel consumption will rise.
When removing the turbocharger, the diesel engine cylinder block Uehara should lead to turbocharger inlet and return pipe were to live with a plug to plug, so that the oil
pressure chamber is not relief, must not be into and out of port Unicom, This will allow diesel engine lubricating oil can not form a sufficient oil pressure, and then place burning diesel engine crankshaft, connecting rods and other parts of the accidents.
2,When turbocharged diesel engine used in the process, what is the most critical
A: The key is to ensure that the pressure of the turbocharger rotor bearing
lubrication. Turbocharger rotor assembly, the work of the rated speed of up to 100,000
rpm or more per minute, such a high speed, has been unable to work any bearing. So
turbocharger is used in the pressure oil to float the hydraulic prop shaft bearings.
Maintain a certain pressure of lubricating oil, bearing in specially designed pressure
chamber, generating a force to the center, keeping the metal shaft and sleeve do not
have contact wear. At the same time the pressure of circulating oil heat also in the
process of running away, to ensure that the bearing operating temperature within the
To this end, the use of turbocharged diesel engine drivers to pay attention to the
(1) turbocharged diesel engine idle speed after each time you start to run 3-5 minutes
, so that the oil pump is working properly and establish the necessary oil pressure to
ensure that the pressure in the engine oil reaches the top of the turbocharger bearings
(2) Do not stop suddenly shut down, you should gradually reduce the engine speed to
idle running 3-5 minutes, until the turbocharger rotor speed dropped significantly
after the throttle is closed.
(3) before the start of a new car without a supercharger or long-term storage before
starting the engine again, to the turbocharger inlet filling more than 50ml of pure
oil (diesel oil with the same grade).
3, the turbocharger work at full load, the exhaust turbine housing is a high
temperature burn Chenganhongse normal? Its limit working temperature?
Normal diesel engine exhaust gas temperature at 600 °C -700 °C, while the turbocharged
diesel engine for high-temperature gas in the vortex shell to promote high-speed
rotating rotor, volute temperatures can reach close to 750 °C, dark red shell in the
dark is normal, It’s extreme temperatures in the 1023K (750 °C). When the turbocharger
volute temperature is too high, it often occursdiesel engine is not working properly,
the turbocharger rotor over speed, so they should immediately reduce the load stop checks, to prevent burning turbine section parts, the main reason for high temperatures as follows:(1) diesel injection pump excessive oil, crude or diesel engine work incomplete combustion, the exhaust temperature. Failure of pump speed. Speed ’cause turbocharger rotor speed, but also of high temperature.
(2) low-pressure injection diesel engine injectors, carbon deposits, poor atomization,
(5) fuel pump plunger of the valve or badly worn, the formation of secondary injection
(4) fuel injection advance angle is too small, diesel-burning time is short and
(5) high exhaust back pressure, poor exhaust, exhaust heat capacity weakened.
(6) boost pressure drop (which may be poor air intake, air filter clogged, or intake
manifold leak) into the cylinder air less, poor high-temperature combustion. 4, the
turbocharger uses what brand of oil? In the use of oil in the daily quality control of
what? A: The long-term high-temperature gas turbocharger work under corrosive
conditions, bearing temperature is high, poor working conditions. The lubricant must
possess to prevent the deposition of high temperature, corrosion and oxidation
resistance. Therefore, the use of CD grade lubricants should be recommended
15W-40CD-class level or 15W-30CD.
Oil filling oil to pay attention to cleanliness, standard impurity particle size less
than 0.015mm, when adding additional oil to be used the same brand of oil. As the
turbocharger and engine share the same pool of oil (oil pan), so routine inspections
to note whether the deterioration of the oil, the availability of diesel fuel leak
into the dilution problem. Maintenance of the machine when the three filter, turbocharger oil to pay special attention to the road smooth, timely replacement of dirty filters, oil spills at the timely repair. 5, turbocharged diesel engine turbocharger routine maintenance on part of what kind of work?
(1) Check the firmness of the joints tighten loose bolts or nuts.
(2) Check the tightness of the link, the interface no air leaks ministries, special
attention to the compressor leak occurred after the link will affect the compression
ratio, thus resulting in decreased power, increased fuel consumption.
(3) Turbochargers are precision products, as long as the smooth operation, no leakage
is generally not allowed to disassemble and maintenance, but in the running were
found to have abnormal sound or abnormal circumstances, will have to stop, and then
open the shell and the air compressor filter connection, manually check the rotor
rotation flexibility, careful observation and listening without impeller and shell collision sound.
(4) check the phenomenon of seamless oil, pay special attention to the work of the
turbine housing when the temperature is high, the oil leak can cause a fire exposure
When the turbocharger can cause abnormal noise, must not continue to use, or they may
cause damage to the engine fully. Should identify the causes and eliminate them.
Necessary to turn off the engine. Then check on the turbocharger. Rotor struck by
hand, if the sound quickly stops or grazing, shall repair manual supercharger
dismantling. Qualified service station may also be sent to repair.
Note: You must hold down the engine turbocharger compressor disengaged only after
the first pipe, or operation of the turbocharger compressor side due to strong
suction, resulting in personal injury. There may be a foreign object damage inhalation