Additive
Role
Role of the additive
- To lower the combustion temperature of the particles to 450°C (instead of 550°C)
- To impregnate the particles forming in the combustion chamber
- To propagate combustion of the particles
Description
Additive EOLYS (supplier "RHODIA")
Composition
- Cerine: 4,2% by mass (DP X42)
- Catalytic converter: brown colour
- Solvent product (combustible hydrocarbon)
Additive tank
Description
Data
- Capacity: 5 litres
- Range: 80 000 kms
- Integrated additive injection pump
- Integrated additive minimum level sensor
- 4 orifices
Orifices
- Additive injection pump outlet (10 mm diameter click fit connector)
- Additive injection pump return (8 mm diameter click fit connector)
- Breather (pressure - vacuum safety valve)
- Degassing (overflow)
Refilling: refer to the procedure given in the mechanical file of the vehicle in question
Location
Location: under the fuel tank
Additive injection pump (1283)
Role
The additive injection pump provides the pressure and the flow required in the additive circuit
Description
A - additive return circuit
B - additive low pressure circuit
Make: MARWAL
The additive injection pump consists of the following components
- (1) anti-return valve (additive low pressure circuit)
- (2) low additive level sensor
- (3) filter
- (4) anti-return valve (additive tank return circuit)
- (5) volumetric pump with rollers
The non return valves prevent additive flowing when the additive injection pump return and outlet click fit connectors are opened
NoteCalibration of the safety valve: 0,2 bar
Pump delivery: 80 l/h
Normal operating pressure: 3 bars
The additive pump is supplied with 12 volts by the fuel additive ECU in the following cases
- For 5 seconds when the ignition is switched on
- Additive phase
Electrical special features
Control: Fuel additive ECU
Allocation of channels of connector
- Terminal 1: (-) low additive level sensor
- Terminal 2: (+) low additive level sensor
- Terminal 3: 12 volts additive injection pump supply
- Terminal 4: additive injection pump earth
- Terminal 5: not used
- Terminal 6: not used
Location
The pump is submerged in the additive tank
NoteThe pump cannot be separated from the additive tank
Low additive level sensor (1283)
Role
The sensor informs the additive ECU that the minimum additive level has been reached when there is 0,3 litres in the additive tank
Depending on the information received, the additive ECU informs the engine injection ECU
The injection ECU informs the BSI which requests activation of the following components
- Request to flash the service LED on the control panel (*)
- Request to display a message on the multifunction screen (*)
Note0,3 litres of additive leaves an additive margin corresponding to filling up 6 times with 80 litres of fuel (*)
(*) depending on vehicle equipment
Description
The sensor consists of a thermistor
The information supplied varies depending on whether the thermistor is in the additive or in air (minimum level reached)
Location
The sensor is incorporated into the additive injection pump
Safety valve
Role
Role of the safety valve
- Sealing function (prevents evaporation of solvent, ingress of dust, mud and water)
- Anti-overturn function
- Breather for the additive tank depending on the additive level
Description
(6) vacuum valve (0,036 bar)
(7) overpressure valve (0,05 +/- 0,01 bar)
(8) vacuum valve return spring
(9) overpressure valve return spring
Function
- The valve (6) acts as a breather for the additive tank depending on the additive level
- The valve (7) performs a sealing and anti-overturn function
Location
The safety valve is located in the rear left hand wheel arch (behind the mud flap)
Additive injector (1284)
Role
The injector is used to inject a set amount of additive into the fuel tank
Description
A - additive return circuit
B - additive low pressure circuit
Type: WEBER IWP 043
NoteCalibration of the safety valve: 3 bars
Electrical special features
Control: Fuel additive ECU
Allocation of channels of connector
- Terminal 1: +12 volts supply
- Terminal 2: control
Electrical features: resistance at 25 °C = 14,7 ohms
Location
The additive injector is located on the fuel tank
Fuel tank cap presence sensor (4320)
Role
The fuel filler cap presence sensor informs the additive ECU whether the filler cap is open or closed
Role of the additive ECU depending on the information received: to detect that fuel may be added
Description
(10) permanent magnet
(11) contact
The filler cap is fitted with a magnet and when the cap is closed, the magnet is opposite the contact
Electrical special features
Supply: Fuel additive ECU
Allocation of channels of connector
- Terminal 1: 5 volts supply
- Terminal 2: signal
- Presence of the magnet opposite the contact: resistance = 150 000 ohms
- Absence of the magnet opposite the contact: resistance = 15 ohms
Fuel gauge (1211)
Role
The fuel sender informs the additive ECU of a variation in fuel level through the built-in systems interface
Role of the additive ECU depending on the information received
- Determine the amount of additive to be injected
- To control the additive injection pump
- To control the additive injector
Description
Check: fuel gauge
| height of the float pin in relation to the base plane | resistance |
|---|---|
| 14 mm | 350 ± 5 ohms |
| 44 mm | 300 ± 5 ohms |
| 75 mm | 250 ± 5 ohms |
| 110 mm | 200 ± 5 ohms |
| 139 mm | 150 ± 5 ohms |
| 171 mm | 100 ± 5 ohms |
| 202 mm | 50 ± 5 ohms |
| height of the float pin in relation to the base plane | resistance |
|---|---|
| 14 mm | 350 ± 11 ohms |
| 41 mm | 300 ± 10 ohms |
| 72 mm | 250 ± 10 ohms |
| 104 mm | 200 ± 9 ohms |
| 138 mm | 150 ± 9 ohms |
| 171 mm | 100 ± 8 ohms |
| 204 mm | 50 ± 2 ohms |
NoteThe fuel sender cannot detect a variation in fuel level of less than 7 litres precisely
Built-in systems interface (BSI1)
The BSI sends the following information to the additive ECU
- Engine speed sensor signal (engine running information)
- Vehicle speed information
- Fuel gauge information
- Position of the ignition key
Fuel additive ECU (1282)
Role
The ECU controls additive injection
The ECU software integrates
- Management of the beginning and duration of additive injection into the fuel tank
- Management of the total amount of additive injected since the beginning of the filter's life
- Emergency strategies
- The diagnostic with memorisation of failures
- Dialogue with the injection ECU
Description
The ECU ensures the electrical control of the following elements
- Low additive level sensor
- Additive injection pump
- Additive injector
- Fuel filler cap presence contact
- Catalytic converter downstream exhaust gas temperature sensor
Make: MAGNETTI MARELLI
Electrical special features
| channel No. | designation |
|---|---|
| 1 | + 12 volts supply (permanent +BAT) |
| 2 | supply +BAT BSI / +APC |
| 3 | BODY VAN + supply (+12 volts) |
| 4 | input: fuel filler cap presence sensor information |
| 5 | input: minimum additive level sensor information |
| 6 | - |
| 7 | - |
| 8 | output: 12V additive injector control |
| 9 | output: 12V additive injection pump control |
| 10 | input: catalytic converter downstream exhaust gas temperature sensor information |
| 11 | input: catalytic converter downstream exhaust gas temperature sensor information |
| 12 | input: fuel filler cap presence sensor information |
| 13 | input: minimum additive level sensor information |
| 14 | data VAN network |
| 15 | data bar VAN network |
| 16 | earth |
Location
Location: on the chassis member near to the base of the right hand B post (according to vehicle)