M266發(fā)動(dòng)機(jī)++附加內(nèi)容

1、M266發(fā)動(dòng)機(jī) 附加內(nèi)容06.01.2009M266發(fā)動(dòng)機(jī)某些設(shè)備和功能目前還未能在中國(guó)市場(chǎng)應(yīng)用，作為附加內(nèi)容列出。Partial load ventilation (turbocharged engine)On the turbocharged engine, the partial load ventilation takes place over the interior crankcase duct, as with the naturally aspirated versions, from there over a hose connection with check valve

2、to the intake manifold.Full load ventilation (turbocharged engine)During full load ventilation, the line of the partial load ventilation is closed by the charger pressure present on the check valve. The air separated from oil in the cyclone separator is fed to the charger air line after the air filt

3、er. Fresh airCyclone separators are used for the separation of blow-by gases.The blow-by gases in the cyclone unit are set into a rotating movement for this.Full load ventilationThe oil part separates due to the occurring centrifugal forces and drips back into the crankcase.Partial load ventilation1

4、Engine block2Cylinder head3Three-part cylinder head cover4Intake manifold5Intake air line to exhaust turbocharger6Drain tube7Vent duct8Vent hose9Check valve10Cyclone separator11Partial load ventilation and full load ventilationIntegration into vehicle networkTurbocharged engineTurbocharged engine le

5、gend1Activated charcoal canister2Fuel tankA1Instrument clusterA1e26 CHECK ENGINE indicator lamp (USA)A1e58Engine diagnosis indicator lampA16Knock sensorB4/3Tank pressure sensor (USA)B6/1Camshaft hall sensorB11/4Coolant temperature sensorB17/8Intake air temperature sensorB28Intake manifold pressure s

6、ensorB28/5Pressure sensor downstream of air cleanerB28/6Pressure sensor upstream of throttle valve actuatorB37Accelerator pedal sensorG2AlternatorG3/1Oxygen sensor before catalytic converterG3/2Oxygen sensor after catalytic converterK100kIAir injection relay (USA)K100kKFuel pump relayK100kMStarter r

7、elayL5Crankshaft position sensorM1StarterM3/3Fuel feed module (fuel pump)M4/7Electric suction fan engine/air conditioning control unit with integrated controlM16/6Throttle valve actuatorM33Electric air pump (USA)N2/7Restraint systems control module (SRS)N3/10Engine control unit (SIM 266)N15/5ES

8、M control unitN22AAC control and operating unit N22/7Comfort AAC control and operating unitN47-5ESP control unitN73 EIS control unitN80Steering column module control unitN93Central gateway control unitS40/3Clutch pedal switchS40/4Cruise control switchS40/5Start enable clutch pedal switch (USA)S43/1O

9、il pressure switchS43/2Oil pressure switch highT1/1Ignition coil cylinders 1/2T1/2Ignition coil cylinders 3/4X11/4Data link connectorY3/9CVT electrohydraulic control unitY19/2Air conditioning water valve Y31/5Boost pressure control pressure transducerY32Air pump switchover valve (USA)Y58/1Regenerati

10、on switchover valveY58/4Activated charcoal filter shutoff valve (USA)Y62Fuel injection valvesY101Divert air switchover valve12/08a54f4c0a37bb0db501e8bc492be84842.pdf Created by Administrator本教材僅供內(nèi)部培訓(xùn)使用，相關(guān)內(nèi)容請(qǐng)以梅賽德斯-奔馳最新的技術(shù)出版物作為依據(jù)。Page 20 of 20Location of components (Turbocharged engine)Y58/1 Purge Con

11、trol ValveCoolant feed lineCoolant return lineOil reservoir ventilationOil return lineT1/2T1/1 Ignition coilB6/1 Camshaft position sensor7 Oil reservoirventilation8 Coolant return line6 Oil return lineA16 Knock sensorB11/4 Coolant temperature sensor1Air filter housing2Turbocharger3Charger vacuum cel

12、l4Damping5Exhaust manifold6Turbocharger oil return line7Turbocharger oil reservoir ventilation8Coolant return line9Coolant feed lineM16/6Throttle valve actuatorN3/10Engine control unit1Air filter housing2Oil filter housing with oil-water heat exchanger3Intake manifold4Vacuum tankS43/1Low pressure oi

13、l pressure switchS43/2High pressure oil pressure switchN3/10Engine control unitPressure sensor (B28)(Turbocharged engine)_Charge air pipe/intake manifoldThe pressure sensor (B28) is located on the intake manifold and supplies the control unit with the current intake manifold pressure, which is used

14、in conjunction with the intake air temperature(B17) for the calculation of the air volume.The pressure measurement range is 0.2 to 2.5 bar.This pressure sensor is marked with a blue sticker.Intake air temperature sensor (B17)(Turbocharged engine)The intake air temperature sensor (B17), located in th

15、e intake manifold, captures the intake air temperature, which is used, together with the intake air throttle, by the ME SIM control unit for the calculation of the fed air volume.GT09.00_0021_C11Ambient pressure sensor(Turbocharged engine)The pressure sensor is integrated in the ME SIM engine contro

16、l unit (N3/10) and measures the ambient pressure. This signal is used for height adaptation.Pressure sensor (B28/5)(Turbocharged engine)_Downstream of air cleanerThe pressure sensor (B28/5) is located in the air line between the air filter and turbocharger and captures the current intake manifold pr

17、essure before the turbocharger.This signal is read in the engine control unit and is used for the protection of the turbocharger with the signal of the pressure sensor (B28/6). This pressure sensor is marked with a green stickerP07.04-2407-01Pressure sensor (B28/6)(Turbocharged engine) _Upstream of

18、throttle valveThe pressure sensor (B28/6) is located in the charge air pipe between the throttle valve actuator and turbocharger and captures the current charger pressure.This signal is the main control variable of the charge pressure regulation (® max. boost pressure 0.7 bar) The pressure meas

19、urement range is 0.2 to 2.5 bar.This pressure sensor is marked with a blue sticker.P07.04-2407-01Turbocharged engine air ductingAn exhaust turbocharger with charge air cooling is used for the compression and cooling to increase the power and torque.The air flows from the air filter through an air li

20、ne to the exhaust turbocharger.The air compressed in the charger flows through a charge air pipe to the charge air cooler, which is located in front of the engine as seen in the direction of travel. A further charge air pipe connects the charge air cooler with the throttle valve actuator, which is l

21、ocated on a short intake manifold between cylinder 2 and 3.1 Air filter2 Air line3Exhaust turbocharger4Vacuum unitCharge pressure control5Pulsation damper6 Charge air pipe to charge air cooler7 Charge air cooler 8 Charge air pipe to intake manifold9Intake manifoldB5/1Charger pressure sensorB17 Charg

22、er air temperature sensorB28Pressure sensorB28/6Pressure sensor before the throttle valve actuatorA Fresh airB Hot charger airC Cooled charger airD ExhaustTurbocharged engine intake manifold(charge air pipe)The turbocharged engine in the A and B-Class has a short intake manifold without selector dru

23、m(variable intake manifold). The intake manifold contains an integrated vacuum tank for the low pressure (vacuum) supply.A check valve is fitted in the vacuum supply line between the intake manifold and the vacuum tank.The fitting direction must be observed when fitting the valve (marked by an arrow

24、 on the valve).The mounts for the intake air temperature sensor, purge valve and intake manifold pressure sensor are located on the top side of the intake manifold.Turbocharger, GeneralThe water-cooled exhaust turbocharger from Borg Warner is made of cast steel and is welded directly with the air-ga

25、p insulated sheet metal exhaust manifold (LSI), which was developed especially for the charger engine.The turbocharger has a pneumatic (charger pressure) actuated wastegate valve for control of the charger pressure as well as a deceleration air valve to avoid whistling noises in deceleration mode.1E

26、xhaust turbocharger2Vacuum (pressure)cell3Pulsation damper4Deceleration air valve5Air gap-insulated exhaust manifold6Oil reservoirGT09.40_0033_C11NoteFor oil leakage at turbocharger (ATL): Clean oily spots on the ATL and locate the leak using contrast spray. It is usually only the connections of the

27、 oil-conducting lines that are leaky. In this case, replace sealing rings of the banjo bolts and tighten to the prescribed torque.Exhaust turbocharger designThe exhaust gases are fed through the air gap insulated exhaust manifold (LSI) in the turbine housing onto the turbine wheel. The flow energy o

28、f the exhaust gases causes the turbine wheel to rotate. This causes the compressor turbine (impeller) wheel, which is connected by a shaft to the turbine wheel, to be driven with the same rpm. The fresh air sucked in by the compressor turbine (impeller) wheel is compressed and fed to the engine. The

29、 shaft housing of the exhaust turbocharger is coolant-cooled and connected to the engine lubrication. An oil receptacle (reservoir) prevents oil remaining in the bearing points of the turbo on extreme tilting of the vehicle.Ø Max. turbine speed up to 202,500rpmØ Max. boost pressure 0.7 bar

30、1Turbo housing2Exhaust turbine3Intake air turbine4Exhaust manifold5Catalytic converterWelding areaThe combination of exhaust manifold and turbocharger as well as the peripheral components such as the wastegate and deceleration air valve to one unit offers the following advantages:· Compact desi

31、gn· Uniform temperature dissipation over the exhaust manifold and charger unit· Omission of a sealing point · Faster response of the catalytic converterThe exhaust turbocharger has a boost pressure control valve, the so-called wastegate valve. This allows the exhaust flow to circumven

32、t the turbine side, which is used for the regulation of the charger pressure.A vacuum (pressure) cell operates the charger pressure control flap over a control rod.Without charge pressure regulation, the vacuum cell closes the charge pressure valve through spring force, the bypass is closed (basic p

33、osition).Charge pressure regulationThe exhaust flow required or the drive of the charger turbine is regulated by a pneumatically controlled wastegate valve depending on the current engine operating point. The engine control unit (N3/10) actuates the charge pressure regulation pressure transducer (Y3

34、1/5) with a PWM signal for charge pressure regulation.The modulated charger pressure arrives at the vacuum cell on the exhaust turbocharger corresponding to the duty cycle of 5-80 %.The boost pressure control valve (wastegate valve) is increasingly opened for the limitation of the charger pressure b

35、y a control rod. A part of the exhaust gas thus bypasses the turbine wheel.This reduces the rpm of the turbine wheel and thus also the charger pressure.The pressure ratio before/after the exhaust turbocharger is captured by the pressure sensor after the air cleaner B28/5 and the pressure sensor befo

36、re the actuator B28/6 and calculated in the control unit for the limitation of the charger pressure.1Wastegate valve2Link rod3Charger vacuum cellY31/5Charger pressure transducerDuty cycle less than 5%Without actuation (duty cycle < 5%), the entire charger pressure works over the charger pressure

37、transducer (Y31/5), switched to bypass, on the charger vacuum cell of the turbocharger. The charger pressure opens the charger pressure flap at approx. 0.3 bar against the spring force over the control rod. The bypass to circumvent the turbine wheel is enabled - the rpm of the turbine wheel reduces.

38、No more charger pressure can be built up.The charger pressure transducer (Y31/5) is not actuated at idle speed and in the partial-load range below a charger pressure of 0.3 bar. Thus the bypass is closed.XOGT07.61_0067_C11Duty cycle between 5 and 80 %The vacuum cell is vented over the pressure trans

39、ducer (Y31/5) to the atmosphere (a) so that no more charger pressure works in the charger vacuum cell. In unpressurized condition, the spring in the vacuum cell keeps the boost pressure control valve closed. The entire exhaust (B) drives the compressor turbine wheel via the turbine wheel.With the du

40、ty cycle between 5 and 80 %, a regulated charger pressure in the charger vacuum cell is actuated against the spring force. This pressure causes the charger pressure flap to assume a cross-section position predefined by the engine control unit. The now reduced exhaust flow drives the compressor turbi

41、ne wheel with decreased force via the turbine wheel. Thus all charger pressures (up to max. 0.7 bar) can be regulated.The vacuum transducer switches between the charger pressure coming from the intake manifold and the atmosphere corresponding to the duty cycle. ODeceleration air (Divert air)Y101Func

42、tionA howling noise arises due to the charger pressure on the not completely closed throttle valve on transition from load operation into deceleration operation. To prevent this noise, a bypass valve (deceleration air valve) is fitted on the pure air side of the exhaust turbocharger. 4Deceleration (

43、divert) air valve22Vacuum tankY101Divert air switchover valveDeceleration air closedThe spring-loaded deceleration air valve is additionally applied with the prevailing charger pressure in the intake manifold (b) over the deceleration air shutoff valve to ensure closing.* Y101 not actuationGT09.40_0

44、044_C11Deceleration air openedIn deceleration operation or with a sudden release of the accelerator, the deceleration valve (Y101) is actuated by the engine control unit.For fast opening of the deceleration air valve, a vacuum tank is integrated in the intake manifold, which is connected to the dece

45、leration air valve in the turbocharger when the throttle valve closes over the deceleration air shutoff valve (Y101).The deceleration air valve is now opened by this low pressure (vacuum) and a bypass, which allows the charger pressure to flow around the compressor turbine wheel, is actuated thus im

46、mediately releasing the charger pressure.Howling noises of the exhaust gas turbo charger (deceleration whistling) are thus prevented.1Intake manifold with vacuum tank2Deceleration valve Y1013Charger pressure supply from turbocharger4Vent line to cylinder head cover5Charger pressure transducer Y31/56

47、Charger vacuum cell7Deceleration air valve8Air pump switchover valve Y329Air injection combination valveIXGT09.40_0045_C11Oil pressure sensor (S43/2) (high oil pressure) turbocharged engine only.The oil pressure switch is used for monitoring the oil pressure in the engine and is read in by the engine control unit (N3/10). When an oil pressure of approx. 1500 mbar is sunk below, the switch passes the information on to the ME control unit.Safety circuit function:In normal driving mode, a part of the oil is in the oil pan and a part in circulation.If the oil level should sink through consump