User Manual

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CONTENTS
CHAPTER 1: GENERAL DETAILS: HDI DIRECT INJECTION SYSTEM
1
I - FOREWORD......................................................................................................1
II - PRINCIPLE OF HDI.............................................................................................4
III - PARTICLE FILTRATION PRINCIPLE.....................................................................5
IV - SAFETY INSTRUCTIONS ...................................................................................6
CHAPTER 2: GENERAL LAYOUT: HDI SYSTEM....................................9
CHAPTER 3: FUEL SUPPLY FUNCTION................................................ 13
I - DIAGRAM ........................................................................................................13
II - COMPONENTS COMMON WITH DOCUMENT "BOSCH EDC 15C2 HDI .. INJECTION
SYSTEM".................................................................................................................15
III - SPECIFIC COMPONENTS ................................................................................15
IV - ELECTRIC FUEL HEATER (1276)......................................................................16
V - LOW PRESSURE PUMP SUPPLY CUT-OFF......................................................16
CHAPTER 4: AIR SUPPLY FUNCTION.................................................... 17
I - DIAGRAM ........................................................................................................17
II - COMPONENTS COMMON WITH DOCUMENT "BOSCH EDC 15C2 HDI .. INJECTION
SYSTEM".................................................................................................................20
III - SPECIFIC COMPONENTS ................................................................................20
IV - VACUUM RESERVE........................................................................................21
V - VARIABLE GEOMETRY TURBOCHARGER........................................................22
VI - VARIABLE "SWIRL".........................................................................................26
VII - SWIRL CONTROL ELECTROVALVE (1264)......................................................27
VIII - FEATURE: INLET MANIFOLD PRESSURE SENSOR (1312) ...............................28
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