Engines Iveco C87 / Cursor 87. Manual

114250

Figure 21

Figure 22

Figure 23

Thermostat

The water pump consists of: rotor, shaft with bearing,
T-gasket and drive pulley with dust shield.

Check that the pump body has no cracks or water
leakage; if it does, replace the entire water pump.

CROSS-SECTION OF THE WATER PUMP

View of thermostat operation

45357

Water circulating in the engine

Water leaving the thermostat

45358

Check the thermostat works properly; replace it if in doubt.

Temperature of start of travel 84

°C ±2°C.

Minimum travel 15 mm at 94

°C ±2°C.

Water pump

NOTE

TO THE HEATER

TO BY-PASS

FROM THE HEAD

TO EXPANSION TANK

FROM THE HEAD

TO RADIATOR

TO THE HEATER

SECTION 1 - GENERAL SPECIFICATIONS

F2C CURSOR ENGINES

Base - June 2006

Figure 24

TURBOCHARGING

The turbocharging system consists of:

- air filter;

- Wastegate turbocharger.

114251

Exhaust gas

Inlet air

Compressed air (hot)

Intake compressed air

SECTION 1 - GENERAL SPECIFICATIONS

F2C CURSOR ENGINES

EGR EXHAUST GAS RECYCLE SYSTEM

The exhaust gas can be partially recycled to cylinders to reduce maximum temperature values of combustion that produce nitro-
gen oxides (NOx).

The exhaust gas recycle system (EGR) reduces combustion temperature and therefore is an efficient NOx emission control
system.

INTERNAL EGR OPERATING ON SUCTION VALVES

The specific design of suction cams of the internal EGR system allows part of exhaust gas to be recycled to engine cylinders.
This type of EGR, called internal EGR, is not equipped with any electronic control, the system is always active. Its configuration
requires no additional parts such as control valves, pipelines or heat exchangers therefore engine profile remains unchanged
Besides main lobe, suction cam has an additional lobe (3) as to configuration without EGR. During concerned cylinder exhaust
phase, this lobe allows a shaft advanced opening of intake valve (*). In this way, part of the exhaust gas is trapped in the suction
duct and later, during cylinder suction phase, this gas is recycled to cylinder inlet for combustion phase..

Figure 25

114026

1. Exhaust cams - 2. Suction cams - 3. EGR lobe - S. Exhaust ducts - A. Intake ducts

Y : Valve lift in mm

X: Crankshaft adjustment

in degrees

– Valve tolerance = 0 mm

— — Valve tolerance = 0,4 mm

SECTION 1 - GENERAL SPECIFICATIONS

F2C CURSOR ENGINES

Base - June 2006

Figure 1

114252

SUPPLY

The Common Rail supply system is equipped with a special pump that maintains fuel at constant high pressure regardless
from phase and cylinder under injection and accumulated in an common duct shared by all electric injectors.

Therefore, fuel at injection pressure, calculated by ECU, is always available at electric injection inlet.

When the solenoid valve of an injector is energized by ECU, in related cylinder the injection of fuel taken directly from the
rail takes place.

Return
circuit

Supply
circuit

SECTION 1 - GENERAL SPECIFICATIONS

F2C CURSOR ENGINES

Content .. 4 5 6 7 ..

Engines Iveco C87 / Cursor 87. Manual - part 6