6
SECTION 10 -- ENGINE -- CHAPTER 1
MODEL TN 55 -- CALIBRATION DATA FOR BOSCH INJECTION PUMP
TYPE VE 3/11 F 1150 L 767 -- VE 3/11 F 1150 L 767--1
ASSEMBLY DATA
Pump timing on engine: delivery start 9
o
±
0.5
o
be-
fore TDC of cylinder 1 compression stroke.
Plunger pre--lift for timing on engine: mm 1 from P.M.I.
(with tools
291754
--
291755
).
Cylinder No.1 delivery line union on pump: marked
with letter A.
ASSEMBLY DIMENSIONS
SYMBOL
K
MS
ya
yb
mm
(in.)
--
--
38.5 to 40.5
(1.52 to 1.59)
42.8 to 48.0
(1.69 to 1.89)
CALIBRATION TEST CONDITIONS
Test bench conforming to ISO 4008/1 .../2
Injectors conforming to ISO 7440--A61 --
(1.688.901.027 and pad with calibrated hole
∅
0.5
mm; 0.02 in.).
Injector pressure setting 250 to 253 bar (3626.1 to
5120.1 psi).
Supply pressure:
0.35
±
0.05 bar (5.1
±
0.7 psi).
. . . . . . . . .
Delivery pipes (conforming to ISO 4093.2):
6 x 2 x 450 mm (0.24 x 0.08 x 17.72 in.)
. . . . . . . . .
Graduate drain time:
: 30”.
. . . . . . . . .
Test liquid: ISO 4113 at a temperature of 45
o
±
1
o
C
(113
o
±
33.8
o
F).
1. START OF DELIVERY
Plunger pre--lift from TDC:
mm --
Pump rotation (viewed from drive side):
counter--clockwise
Injection order: 1--2--3
2. ADVANCE REGULATOR STROKE
Rpm: 1200
Advance stroke: mm 0.7 to 1.1 (inches 0.03 to 0.04)
3. FUEL SUPPLY PUMP PRESSURE
Rpm: 1200
Internal pressure: bar 8.1 to 8.7 (psi 117.5 to 126.2)
4. FULL LOAD DELIVERY
Rpm: 700
Delivery per 1000 shots: cm
3
59.5 to 60.5
(gal.0.0157 to 0.0159)
Spread: cm
3
-- 3.5
(gal. --0.000925)
5. SPREAD GOVERNOR AT IDLE SPEED
Rpm: 325
Delivery per 1000 shots: cm
3
8.4 to 12.4
(gal. 0.0022 to 0.0032)
Spread: cm
3
(gal.)
6. SPREAD GOVERNOR AT MAXIMUM SPEED
Rpm: 1220
Delivery per 1000 shots: cm
3
27 to 33
(gal. 0.007 to 0.008)
Spread: --
7. DELIVERY AT STARTING
Rpm: 100
Delivery per 1000 shots: cm
3
60 to 100 (gal. 0.016 to 0.026)
8. INJECTION ADVANCE PROGRESSION
Rpm
1200
1250
Advance stroke
mm (in.)
0.7 to 1.1 (0.03 to 0.04)
1.4 to 1.8 (0.06 to 0.07)
9. TRANSFER PRESSURE PROGRESSION
Rpm
1200
400
700
Internal pressure supply
bar (psi) 8.1to 8.7 (117.5 to 126.2)
3.2 to 3.8 (46.4 to 55.1)
4.7 to 6.1 (68.1 to 88.5)
10. BACKFLOW
Rpm
400
1150
Backflow
l/h (gal./h)
13 to 33 (3.43 to 8.72)
25 to 37 (6.60 to 9.77)
(continued overleaf)
Note: the values shown above in brackets must be used for checking purposes only.
