During the engine operating phases not requiring gas
circulation (e.g. particulate filter regeneration, start-up,
engine cold, idle running, load demands, vehicle running at
high altitudes), the control unit control signal to the
modulating solenoid valve will be cancelled. The solenoid
valve will close the connection between the servo brake
vacuum circuit and the E.G.R. one, and will simultaneously
resume the atmospheric pressure within the E.G.R. circuit.
Figure 273
a. Brake booster vacuum circuit - b. EGR modulated vacuum circuit. - c. VGT actuator modulated negative pressure circuit
1. Electronic central unit - 2. Throttle valve assembly - 3. Negative pressure take-off - 4 Water temperature sensor - 5. Engine
rpm sensor - 6. E.G.R. pneumatic valve - 7. Flow meter - 8. Intake air filter - 9. EGR modulating solenoid valve -
10. VGT actuator modulating solenoid valve (if present) - 11. Negative pressure additional tank (only vehicles with 136 HP
engine) - 12. Negative pressure power-assisted brake- 13. Negative pressure tank.
112219
EGR system operation
The E.D.C. electronic control unit E.D.C. processes the
information from the atmospheric pressure sensor, water
temperature sensor, engine revs sensor and accelerator
pedal potentiometer. It drives, according to ways and
procedures properly programmed within its own memory,
both the modulating solenoid valve and the throttle valve by
means of a PWM signal.
The modulating solenoid valve will, every time is it driver by
the E.D.C. control unit 16, communicate the servo brake
vacuum circuit with the E.G.R. one. A vacuum value will be
obtained within the EGR circuit, depending on the control
signal.
Such vacuum will act on the E.G.R. pneumatic valve
membrane, by withdrawing and lifting the shutter that
normally obstructs the passage of the exhaust gas towards
the intake.
Thus, the exhaust gas, passing through the heat exchanger
where it is cooled, will be conveyed into the throttle valve
assembly chamber where it will be mixed with the air from
the intercooler and made to flow out into the inlet manifold.
If the vehicle is equipped with the D.P.F. catalyst, the EDC
control unit 16 will simultaneously adapt the flow rate of fuel
to be injected into the cylinders, depending on the amount
of circulated exhaust gas.
130
F1A ENGINE
D
AILY
E
URO
4
Base - March 2006
Print 603.93.651
EXHAUST GAS RECIRCULATION (EGR) SYSTEM (Exhaust gas recirculation)
Summary of Contents for daily euro 4
Page 1: ...DAILY EURO 4 REPAIR MANUAL MECHANICAL ELECTRIC ELECTRONIC ...
Page 12: ...Base March 2006 Print 603 93 651 ...
Page 14: ...Base March 2006 Print 603 93 651 ...
Page 16: ...2 GENERAL DAILY EURO 4 Base March 2006 Print 603 93 651 Print 603 43 671 ...
Page 30: ...2 F1A ENGINE DAILY EURO 4 Base March 2006 Print 603 93 651 ...
Page 58: ...108321 Figure 30 30 F1A ENGINE DAILY EURO 4 Base March 2006 Print 603 93 651 ENGINE VIEWS ...
Page 81: ...F1A ENGINE 53 DAILY EURO 4 Print 603 93 651 Base March 2006 ...
Page 82: ...54 F1A ENGINE DAILY EURO 4 Base March 2006 Print 603 93 651 ...
Page 83: ...F1A ENGINE 55 DAILY EURO 4 Print 603 93 651 Base March 2006 ...
Page 84: ...56 F1A ENGINE DAILY EURO 4 Base March 2006 Print 603 93 651 ...
Page 85: ...F1A ENGINE 57 DAILY EURO 4 Print 603 93 651 Base March 2006 ...
Page 86: ...58 F1A ENGINE DAILY EURO 4 Base March 2006 Print 603 93 651 ...
Page 87: ...F1A ENGINE 59 DAILY EURO 4 Print 603 93 651 Base March 2006 ...
Page 88: ...60 F1A ENGINE DAILY EURO 4 Base March 2006 Print 603 93 651 ...
Page 89: ...F1A ENGINE 61 DAILY EURO 4 Print 603 93 651 Base March 2006 ...
Page 90: ...62 F1A ENGINE DAILY EURO 4 Base March 2006 Print 603 93 651 ...
Page 144: ...116 F1A ENGINE DAILY EURO 4 Base March 2006 Print 603 93 651 ...
Page 148: ...120 F1A ENGINE DAILY EURO 4 Base March 2006 Print 603 93 651 ...
Page 150: ...122 F1A ENGINE DAILY EURO 4 Base March 2006 Print 603 93 651 ...
Page 166: ...138 F1A ENGINE DAILY EURO 4 Base March 2006 Print 603 93 651 ...
Page 170: ...142 F1A ENGINE DAILY EURO 4 Base March 2006 Print 603 93 651 ...
Page 172: ...144 F1A ENGINE DAILY EURO 4 Base March 2006 Print 603 93 651 ...
Page 213: ...107864 Figure 45 F1C ENGINE 185 DAILY EURO 4 Print 603 93 651 Base March 2006 ENGINE VIEWS ...
Page 240: ...MOTORI F1A F1C 212 F1C ENGINE DAILY EURO 4 Base March 2006 Print 603 93 651 ...
Page 241: ...MOTORI F1A F1C F1C ENGINE 213 DAILY EURO 4 Print 603 93 651 Base March 2006 ...
Page 242: ...MOTORI F1A F1C 214 F1C ENGINE DAILY EURO 4 Base March 2006 Print 603 93 651 ...
Page 243: ...MOTORI F1A F1C F1C ENGINE 215 DAILY EURO 4 Print 603 93 651 Base March 2006 ...
Page 244: ...MOTORI F1A F1C 216 F1C ENGINE DAILY EURO 4 Base March 2006 Print 603 93 651 ...
Page 245: ...MOTORI F1A F1C F1C ENGINE 217 DAILY EURO 4 Print 603 93 651 Base March 2006 ...
Page 300: ...272 F1C ENGINE DAILY EURO 4 Base March 2006 Print 603 93 651 ...
Page 322: ...294 F1C ENGINE DAILY EURO 4 Base March 2006 Print 603 93 651 ...
Page 340: ...312 F1C ENGINE DAILY EURO 4 Base March 2006 Print 603 93 651 ...
Page 342: ...2 CLUTCH DAILY EURO 4 Base March 2006 Print 603 93 651 ...
Page 366: ...26 CLUTCH DAILY EURO 4 Base March 2006 Print 603 93 651 ...
Page 368: ...2 TRANSMISSION DAILY EURO 4 Base March 2006 Print 603 93 651 ...
Page 372: ...6 TRANSMISSION DAILY EURO 4 Base March 2006 Print 603 93 651 ...
Page 378: ...12 TRANSMISSION DAILY EURO 4 Base March 2006 Print 603 93 651 ...
Page 414: ...48 5 S 300 TRANSMISSIONS DAILY EURO 4 Base March 2006 Print 603 93 651 ...
Page 416: ...50 6 S 400 O D TRANSMISSION DAILY EURO 4 Base March 2006 Print 603 93 651 ...
Page 492: ...126 6 S 400 A O D TRANSMISSION DAILY EURO 4 Base March 2006 Print 603 93 651 ...
Page 494: ...128 POWER TAKE OFF DAILY EURO 4 Base March 2006 Print 603 93 651 ...
Page 500: ...134 POWER TAKE OFF DAILY EURO 4 Base March 2006 Print 603 93 651 ...
Page 502: ...2 PROPELLER SHAFTS DAILY EURO 4 Base March 2006 Print 603 93 651 ...
Page 512: ...12 PROPELLER SHAFTS DAILY EURO 4 Base March 2006 Print 603 93 651 ...
Page 514: ...2 REAR AXLES DAILY EURO 4 Base March 2006 Print 603 93 651 ...
Page 518: ...6 REAR AXLE NDA RS DAILY EURO 4 Base March 2006 Print 603 93 651 ...
Page 530: ...18 REAR AXLE NDA RS DAILY EURO 4 Base March 2006 Print 603 93 651 ...
Page 546: ...34 REAR AXLE NDA RS DAILY EURO 4 Base March 2006 Print 603 93 651 ...
Page 548: ...36 REAR AXLE NDA RG DAILY EURO 4 Base March 2006 Print 603 93 651 ...
Page 564: ...52 REAR AXLE NDA RG DAILY EURO 4 Base March 2006 Print 603 93 651 ...
Page 566: ...54 REAR AXLE 450511 DAILY EURO 4 Base March 2006 Print 603 93 651 ...
Page 578: ...66 REAR AXLE 450511 DAILY EURO 4 Base March 2006 Print 603 93 651 ...
Page 594: ...82 REAR AXLE 450511 DAILY EURO 4 Base March 2006 Print 603 93 651 ...
Page 596: ...84 REAR AXLE 450517 2 DAILY EURO 4 Base March 2006 Print 603 93 651 ...
Page 606: ...94 REAR AXLE 450517 2 DAILY EURO 4 Base March 2006 Print 603 93 651 ...
Page 608: ...96 REAR AXLE 450517 2 DAILY EURO 4 Base March 2006 Print 603 93 651 ...
Page 626: ...2 AXLES DAILY EURO 4 Base March 2006 Print 603 93 651 ...
Page 630: ...6 AXLES DAILY EURO 4 Base March 2006 Print 603 93 651 ...
Page 632: ...8 AXLE 5817 DAILY EURO 4 Base March 2006 Print 603 93 651 ...
Page 638: ...14 AXLE 5817 DAILY EURO 4 Base March 2006 Print 603 93 651 ...
Page 644: ...20 AXLE 5817 DAILY EURO 4 Base March 2006 Print 603 93 651 ...
Page 646: ...22 AXLE 5818 DAILY EURO 4 Base March 2006 Print 603 93 651 ...
Page 654: ...30 AXLE 5819 DAILY EURO 4 Base March 2006 Print 603 93 651 ...
Page 660: ...36 AXLE 5819 DAILY EURO 4 Base March 2006 Print 603 93 651 ...
Page 662: ...38 AXLE 5823 DAILY EURO 4 Base March 2006 Print 603 93 651 ...
Page 672: ...48 AXLE 5823 DAILY EURO 4 Base March 2006 Print 603 93 651 ...
Page 674: ...50 WHEEL GEOMETRY DAILY EURO 4 Base March 2006 Print 603 93 651 ...
Page 686: ...2 SUSPENSIONS DAILY EURO 4 Base March 2006 Print 603 93 651 ...
Page 688: ...4 FRONT AND REAR MECHANICAL SUSPENSIONS DAILY EURO 4 Base March 2006 Print 603 93 651 ...
Page 706: ...22 FRONT MECHANICAL SUSPENSIONS DAILY EURO 4 Base March 2006 Print 603 93 651 ...
Page 712: ...28 FRONT MECHANICAL SUSPENSIONS DAILY EURO 4 Base March 2006 Print 603 93 651 ...
Page 714: ...30 FRONT MECHANICAL SUSPENSIONS DAILY EURO 4 Base March 2006 Print 603 93 651 ...
Page 724: ...40 FRONT MECHANICAL SUSPENSIONS DAILY EURO 4 Base March 2006 Print 603 93 651 ...
Page 728: ...44 FRONT MECHANICAL SUSPENSIONS DAILY EURO 4 Base March 2006 Print 603 93 651 ...
Page 736: ...52 REAR MECHANICAL SUSPENSIONS DAILY EURO 4 Base March 2006 Print 603 93 651 ...
Page 782: ...2 WHEEL AND TYRES DAILY EURO 4 Base March 2006 Print 603 93 651 ...
Page 790: ...10 WHEEL AND TYRES DAILY EURO 4 Base March 2006 Print 603 93 651 ...
Page 818: ...28 STEERING GEAR DAILY EURO 4 Base March 2006 Print 603 93 651 ...
Page 822: ...4 HYDRO PNEUMATIC SYSTEM BRAKES DAILY EURO 4 Base March 2006 Print 603 93 651 ...
Page 922: ...24 CAB AIR CONDITIONING DAILY EURO 4 Base March 2006 Print 603 93 651 ...
Page 924: ...2 SCHEDULED MAINTENANCE DAILY EURO 4 Base March 2006 Print 603 93 651 Print 603 43 351 ...
Page 936: ...14 SCHEDULED MAINTENANCE DAILY EURO 4 Base March 2006 Print 603 93 651 ...
Page 1023: ...Figure 64 112286 ELECTRIC ELECTRONIC SYSTEM 87 DAILY EURO 4 Base March 2006 Print 603 93 651 ...
Page 1110: ...174 ELECTRIC ELECTRONIC SYSTEM DAILY EURO 4 Base March 2006 Print 603 93 651 ...