Display shows
Possible cause of fault
Fault remedy
◆
Shortage of fuel
◆
Air in fuel system
– Check fuel supply system
parts of fuel supply system
◆
Injectors for cylinders 1…4
-N30...N33- defective
6.4.3 Display group 3 - Exhaust gas recirculation
Note
◆
To perform the test increase engine speed from 1500 rpm to
full throttle at full load. Note conditions for measurements at
full load
◆
The measured values must be read at an engine speed of
2500 rpm (2nd person required).
Test prerequisites
● Engine warm, coolant temperature not below 80°C
● Engine speed 2200…2800 rpm
● Engine at full load
Display
zone
Operating mode or component
Specification
Evaluation
1
Engine speed
2200...2800 rpm
---
2
Intaken air mass (specified):
620...830 mg/stroke
---
3
Intaken air mass (actual):
Approx. intaken air
mass (specified)
4
Duty cycle of exhaust gas recirculation
valve
65...80 %
---
Evaluation: display group 3, display zone 3 - intaken air
mass (actual)
Display shows
Possible cause of fault
Fault remedy
Below specification
◆
Excessive exhaust gas recirculation
– Check exhaust gas recirculation sys-
◆
Unmetered air
– Check intake system for leaks
Above specification
◆
Engine too cold
– Warm up engine, and repeat test
◆
Insufficient exhaust gas recirculation
– Give burst on throttle
◆
Defective air mass meter -G70-
Evaluation: display group 3, display zone 4 - duty cycle of
exhaust gas recirculation valve
Industriemotoren - Industrial Engines 2009
▶
Workshop Manual for Diesel Engine (2.0 l/36-75 kW_EA 189) 05.2015
3
6 Measured value blocks, engine codes CPYA, CPYB, CPYC, CPYD, CPYE, CPYF, CPYG
127