podolak2 píše:Jo a byl vadny vstrik jeden kterej vse propoustel...ted vstriky drzi a na rampe jsme meli 700baru.... Ale to vse bylo docileno manualne (ventil na cerpadle kdyz jsme vypli konektor a zacli tocit motorem tak krasne natlaci rampu ale pokud zapnu konektor do nej tak nevytlaci ani kapku napeti do nej modry drat 3.6v...a pak je tu druhy na te rampe ventil do nej jde taky 3.6v cervenobily drat a ten nam taky propousti naftu do prepadu pri tlaku 100baru - ale pokud mu dam plne napeti 12v tal drzi krasne takze je funkcni.)
Cili vidim to na nejaky blok od jednotky??? Ale diag nepise chybu ...jen jsou odpojene svetla kapota dole naraznik cidla pdc a klapka na sani coz nema prece vliv ne??
1. Červený drát s bílým pruhem na X2264 vede přímo od 20A pojistky č. F01 v boxu Motorsicherungen v motorovém prostoru v boxu u ŘJ motoru.
2. Modrý drát? Podle schémat je vše popisované (Rail pressure control valve, Volume control valve, Boost pressure control - solenoid valve) krmeno právě tím červenobílým od pojistky F01.
Info ke kontrole tlaku v railu přímo z WDS:
Rail pressure control DDE 5.0/5.1
The following components belong to the common rail system and influence the rail pressure control:
High pressure pump (HDP)
Rail Pressure Control Valve (DRV)
Flow regulating valve (MRV)
Rail pressure sensor
High-pressure accumulator (fuel rail)
High pressure lines
Fuel injectors
Function
The high pressure pump constantly generates the system pressure held in the fuel rail. The fuel-rail pressure is adjusted to the correct level according to engine operating parameters by one of the following two possible control methods (dual actuator concept):
Pressure regulation by the rail pressure control valve:
The high pressure pump constantly delivers fuel at high pressure to the rail. The rail pressure control valve diverts any excess fuel volume delivered to the rail into the return line, thereby maintaining the rail pressure at the required level. The higher the control signal current, the higher the rail pressure that is maintained.
The flow regulating valve is set to maximum flow.
Volumetric flow regulation by the flow regulating valve:
The flow regulating valve only allows the amount of fuel to flow into the high pressure pump from the low-pressure side that is required in order to generate the required fuel rail pressure. The high-pressure pump cylinders are not completely filled with fuel. The higher the control signal current, the lower is the rail pressure that is generated.
The rail pressure control valve is kept closed, i.e. set to maximum rail pressure.
The two control methods are used under the following engine operating conditions:
When the engine is started, rail pressure control is always active.
When the engine is running:
at coolant temperatures below about 19°C rail pressure control is always active
at coolant temperatures above about 19°C volumetric flow regulation is active
Rail pressure monitoring
The rail pressure is monitored during engine start and engine operation by way of setpoint/actual value comparison. The rail pressure sensor supplies the actual value to the DDE. The setpoint is calculated by the DDE depending on the operating status. If the DDE detects a discrepancy between the specified and actual level that is outside the permissible limits, a fault is stored in the fault memory.
An impermissible deviation of the rail pressure from the setpoint can be caused by the following:
External leaks at components in the common rail system
Flow regulating valve not opening
Internal leaks in common rail system, e.g.
In the high pressure pump (e.g. worn piston)
on rail pressure control valve (diverting too little or too much fuel into the return line)
At the fuel injectors (too much volume in the return flow)
External influences such as defective fuel supply, clogged fuel return system, air in fuel system
Troubleshooting
If the DDE detects a rail-pressure control discrepancy that is outside the permissible limits, its first action is to limit the injection volume. If this does not eliminate the control discrepancy or keep it to a low level, the engine cuts out or, as the case may be, cannot be started.
Flow regulating valve DDE 5.0/5.1
The flow regulating valve is an electrically controlled valve that is mounted on the high pressure pump. When volumetric flow regulation is active, the DDE controls the flow regulating valve by means of a variable pulse duty factor in order to set the rail pressure to the level calculated by the DDE.
Function
The flow regulating valve controls the flow of fuel into the high pressure pump from the low-pressure side, thereby controlling fuel-rail pressure as required. The less fuel the flow regulating valve allows to flow into the high pressure side, the less the radial cylinders of the high-pressure pump are filled. Consequently, the fuel-rail pressure is correspondingly lower.
Pulse duty factor, control signal current, rail pressure and volumetric flow through the valve are related to one another as follows:
Pulse duty factor
Control signal current
Pressure build-up
Volumetric flow into high-pressure side
High
High
Low
Low
Low
Low
High
High
Troubleshooting
If a fault is detected in the control of the flow regulating valve, the following faults may be stored:
4302, Activation circuit break
4303, Excess temperature output stage
4310, Activation short circuit to B+
4321, Activation short circuit to B-
Consequence:
rail pressure control is changed over to pressure control
The injection volume is limited
) svůj problém ale zároveň si i uvědomil, že by mohlo být vadné pouze těsnění regulátoru tlaku, díky kterému by drtivá většina tlakové nafty z cr čerpadla valila buďto ven a blila na zem, nebo rovnou do přepadu.
