Land Rover Common Rail System Crs Denso Manual

Diesel Injection Pump
COMMON RAIL SYSTEM (CRS)
OPERATION
September, 2007
00400534E
SERVICE MANUAL 

     
© 2007  DENSO  CORPORATION
All  Rights  Reserved.  This  book  may  not  be  reproduced
or  copied,  in  whole  or  in  part,  without  the  written
permission  of  the  publisher. 

Revision History
Revision History
DateRevision Contents
2007. 09 • SCV: Explanation of compact SCV added to Suction Control Valve (SCV). (Operation: Refer
to page 1-30.)
• Repair section added. 

Table of Contents
Table of Contents
Operation Section
1. GENERAL DESCRIPTION
1.1 Changes In Environment Surrounding The Diesel Engine  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
1.2 Demands On Fuel Injection System  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
1.3 Types Of And Transitions In ECD (ELECTRONICALLY CONTROLLED DIESEL) Systems  . . . . . . . . . . . . . . 1-3
1.4 Common Rail System...

Table of Contents
8. DIAGNOSIS
8.1 Outline Of The Diagnostic Function. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-83
8.2 Diagnosis Inspection Using DST-1  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-83
8.3 Diagnosis Inspection Using The MIL (Malfunction Indicator Light) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-84
8.4 Throttle Body...

Operation Section1–1
1. GENERAL DESCRIPTION
1.1 Changes In Environment Surrounding The Diesel Engine
zThroughout the world, there is a desperate need to improve vehicle fuel economy for the purposes of preventing global
warming and reducing exhaust gas emissions that affect human health. Diesel engine vehicles are highly acclaimed in
Europe, due to the good fuel economy that diesel fuel offers. On the other hand, the nitrogen oxides (NOx) and par-
ticulate matter (PM) contained in the exhaust gas must be...

Operation Section1–2
1.2 Demands On Fuel Injection System
zIn order to address the various demands that are imposed on diesel vehicles, the fuel injection system (including the
injection pump and nozzles) plays a significant role because it directly affects the performance of the engine and the
vehicle. Some of the demands are: higher injection pressure, optimized injection rate, higher precision of injection timing
control, and higher precision of injection quantity control.
< NOTE >
zFor further...

Operation Section1–3
1.3 Types Of And Transitions In ECD (ELECTRONICALLY CONTROLLED
DIESEL) Systems
zECD systems include the ECD-V series (V3, V4, and V5) which implements electronic control through distributed pumps
(VE type pumps), and common rail systems made up of a supply pump, rail, and injectors. Types are the ECD-V3 and
V5 for passenger cars and RVs, the ECD-V4 that can also support small trucks, common rail systems for trucks, and
common rail systems for passenger cars and RVs. In addition,...

Operation Section1–4
1.4 Common Rail System Characteristics
zThe common rail system uses a type of accumulation chamber called a rail to store pressurized fuel, and injectors that
contain electronically controlled solenoid valves to inject the pressurized fuel into the cylinders.
zBecause the engine ECU controls the injection system (including the injection pressure, injection rate, and injection tim-
ing), the injection system is independent and thus unaffected by the engine speed or load.
zBecause the...

Operation Section1–5
1.5 Common Rail System And Supply Pump Transitions
zThe worlds first common rail system for trucks was introduced in 1995. In 1999, the common rail system for passenger
cars (the HP2 supply pump) was introduced, and then in 2001 a common rail system using the HP3 pump (a lighter and
more compact supply pump) was introduced. In 2004, the three-cylinder HP4 based on the HP3 was introduced. 
1.6 Injector Transitions
Q000752E
1996   1998  2000  2002 2004 2006
120MPa
180MPa
135MPa
HP0...