2010 ASTON MARTIN V8 VANTAGE fuel pressure
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Evaporative Emissions (03.13)
Engine (03.00)
May 2007 Workshop Manual 3-13-1
Engine (03.00)
Evaporative Emissions (03.13)
Description
The evaporative loss system prevents escape of fuel vapours
into the atmosphere.
Fuel vapour is displaced from the fuel tank during filling.
Vapour is also displaced due to fuel evaporation in higher
temperatures. Displaced fuel vapour is absorbed in the
carbon canister filter located on top of the fuel tank.
During normal engine running, absorbed fuel vapour is
purged from the carbon canisters and mixed with the normal
fuel/air charge in the inlet manifold.
System Operation
Displaced fuel vapour leaves the fuel tank via the normally
open fill level vent valve and the roll over valves. It passes
through the carbon canister where fuel hydrocarbons are
absorbed. Clean air leaves the system via the normally open
canister vent valve. This valve is only closed during
diagnostic pressure testing of the fuel system.
During normal engine ru nning, the single vapour
management valve in the engine bay is periodically opened
allowing fresh air flow into th e open canister vent valve,
through the carbon canister, through the vapour
management valve and into the primary inlet manifold. This
fresh air flow progressively purg es any absorbed fuel vapour
from the carbon canister.
Page 508 of 947
Anti-lock Braking System (ABS) (06.09)
Brake system (06.00)
6-9-2 Workshop Manual Issue 4, November 2008
difference between the ideal and actual response within a
tolerance band. This directly influences the forces on the
tires to generate a corrective yaw moment to reduce the side
forces of the tires where appropriate
System Overview
The DSC system embraces capabilities far beyond that of
ABS, or ABS and traction control combined, while relying on
the components of these systems. It also incorporates these
additional sensors for measur ing the vehicle’s motion and
brake system pressure:
Ya w r a t e s e n s o r - located centrally on the transmission
tunnel.
Lateral acceleration sensor - integrated with the yaw rate
sensor.
Steering angle sensor - located on the upper steering
column.
Pressure transducer - located on master cylinder.
The ABS / DSC module supports data exchange with other
vehicle electronic systems via the CAN network; the module
also enables diagnostic interrogation using WDS.
The following components register driver demand and the
ABS / DSC module processes their signals as a basis for
defining an ideal response:
PCM - position of accelerator pedal.
Brake master cylinder pressure transducer - driver’s
braking effort.
Steering angle sensor - position of steering wheel.
There are many supplementary parameters also included in
the processing calculations these include the coefficient of
friction and vehicle speed. The ABS / DSC module monitors
these factors based on signals transmitted by the sensors for:
• Wheel speed
• Lateral acceleration
• Brake pressure
• Yaw rate
Using these parameters, the function of the ABS / DSC
module is to determine the current vehicle status based on
the yaw-rate signal and the slip as estimated by the ABS /
DSC module. It then maintains the vehicle response within
a tolerance of the ‘normal’ behaviour, which is easily
controlled by the driver.
In order to generate the desired yaw behaviour the ABS /
DSC module controls the selected wheels using the ABS
hydraulic system and engine control system. In the event of
engine intervention, the ABS / DSC module calculates the
torque which should be supplied by the engine to the
wheels, and relays this request signal to the PCM which
implements the torque request.
The PCM receives signals from the DSC system via the CAN
bus and reduces engine torque as follows:
• The throttle is positioned to provide the requested engine target torque. • During the transient phase of torque reduction caused by
mechanical and combustion delays, other alternative
torque reduction methods are used to provide a quicker
response.
• The ignition is retarded and / or the fuel is cut-off at the injectors at selected cylinders.
• Ignition and fuelling are reinstated when the engine torque reaches the requested value
Operation Summary
• DSC is switched ‘ON’ when the engine is started
• When the system is operating , the DSC light in the instrument cluster will flash, at the rate of twice a second
• DSC can be switched ‘OFF / ON’ by pressing the DSC switch
• The DSC light in the instru ment cluster will illuminate
continuously when the system is switched ‘Off’.
• ‘DSC OFF’ will be displayed in the message centre right to indicate the system has been switched ‘OFF’
• A malfunction in the traction control system will be indicated to the driver by the following:
• The DSC light in the instru ment cluster will illuminate
continuously
• The message ‘DSC NOT AVAILABLE’ will be displayed in the message centre right
• If vehicle speed control is engaged it will automatically disengage when traction control is operating .
Traction Control
Traction control is a function of DSC, and is operated in
association with DSC. Traction control prevents excessive
wheel-spin at standing starts, or during acceleration. Wheel-
spin is usually caused by ex cessive use of the accelerator
pedal, or slippery, loose or bumpy road surfaces. To prevent
excessive wheel-spin and mainta in vehicle stability such
situations are overcome by the intervention of the traction
control system by:
• Braking the driven-wheel when it starts to slip
• And / or adapting the engine torque to a level corresponding to the traction available on the road
surface.
Functional Description
Traction control uses the ABS electronic and mechanical /
hydraulic hardware with additional valves to control the
braking pressure at the calipe rs. An engine interface also
enables the engine to respond to torque reduction requests
from the traction control. As with ABS, the signals from the
wheel-speed sensors are supplied to the ABS module, where
they are used to calculate the wheel-slip of the individual
wheels. Traction control intervention is initiated if the slip at
one of the wheels is excessive.
Page 509 of 947
Anti-lock Braking System (ABS) (06.09)
Brake system (06.00)
Issue 4, November 2008 Workshop Manual 6-9-3
Engine Intervention
In the event of wheel-slip the ABS / DSC module calculates
the torque, which should be applied by the engine to reduce
the wheel-slip (this torque does not exceed driver demand).
Engine torque reduction is then requested from the PCM via
the CAN bus. The PCM, in response to these signals, reduces
engine torque by controlling the ignition and fuelling. A
traction control gearshift pattern is automatically selected
within the automatic transmission software whenever
traction control is active.
Brake Intervention
This function operates by increasing the pressure in the
brake caliper of the slipping wheel, by closing the separation
valve and the inlet valve of the non-slipping wheel and
running the modulator pump. This takes fluid from the fluid
reservoir via the non-actuated master cylinder and
pressurizes the brake caliper. The pressure is modulated at
the caliper via the inlet and outlet valves to achieve the
desired wheel-slip target to maximize traction.
ABS / DSC Circuit
Specifications
SR,05UR,05YR,0.5NR,0.5
WR,05NR,05
YG,05WG,05
YU,05WU,05
W,05N,05
W,0.5U,0.5R,0.5
P,0.5Y,0.5
B,0.5WG,0.5GB,0.5
B,0.5BG,0.5
GW,0.5
P,0.5
U,0.5
U,3.0
BK,1.0BK,1.0
P,0.35P,0.35P,0.35 U,3.0
WG,05YG,05
WU,05
SR,05UR,05YR,0.5NR,0.5
WG,05YG,05
WU,05
WG,05YG,05
WU,05YU,05YU,05YU,05Module-ABS
OBD2-Body (B)
Earth-Module ABSEarth-Module ABS
C1184-18C2410-6
Sensor-Brake Pressure
Sensor-Brake Pedal Travel
Sensor-Rear ABS-LH
C0746-7C0746-6
C0746-5
Switch-Brake Boost
Sensor-Yawrate / Acceleration
C2411-6C2411-5C2411-4
C2411-3
C0144-7C0144-3
C0144-2
Sensor-Front ABS-LH
Sensor-Front ABS-RH
C2410-10C2410-9
C2410-8
Sensor-Rear ABS-RH
C0746-4C0144-1C2410-7
C0877-7
K-LINESPL50-KL/FA
C0362-1C0434-1
C2444-2
SIGC2444-1
GND
C2444-3
SENSP
C2446-2
GNDC2446-1
SENSPT
C2446-3
SIG
C0501-47
GNDC0501-16
GND
C0501-2K-LINE
C0501-24
GND
C0501-31
PWM
C0501-30
NC
C0501-25
CAN HS-
C0501-28
SIGC0501-27
NO
C0501-29
CAN HS+C0501-6
CLUST_SP
C0501-17
PWR
C0501-5
GND
C0501-32BATT FEED
C0501-7
SENSPT
C0501-3 SIG
C0501-20 SIGC0501-19
GND
C0501-18 SENSP
C0501-4IGN FEED
C0501-46
F/L/GNDC0501-45
F/L/SIG
C0501-42
R/R/GNDC0501-43
R/R/SIG
C0501-36
R/L/SIG
C0501-34
F/R/SIGC0501-33
F/R/GND
C0501-1
BATT FEEDC0501-37
R/L/GND
C2448-5
C2448-3
C2448-2C2448-1
C2448-4
C1656-3 CLUS_SPC1656-2
CAN HS+C1656-1 CAN HS-
C1656-5
GND
C0516-2-C0516-1+
C0517-2
-C0517-1+
C0502-1
+
C0503-2 -C0503-1+
C0502-2 -
Sensor
Steering Angle
Sheet 61
F4
30.0 AmpsRelay 1
Underbonnet Fusebox
DIODE 1
F28
10.0 Amps
F20
30.0 Amps
F19
30.0 Amps
Earth
Steering Angle
Sensor
C0576-1
C0577-4C2608-1 VBATT
C0573-2
C0571-3
C0573-3
C0578-8SPL5-VIGN/FOR
C1672-5
VPWRC1672-8
GND
011-6-003
Oils/Greases
Brake FluidCastrol Response Super Dot 4
Torque Figures
DescriptionNm.lb. / ft.
Modulator to Bracket 5 4
Modulator / Bracket to body 9 7
Brake hose unions 17 1413
10.5
17 Nm. 17 Nm.
17 Nm.
14 Nm.
14 Nm. 14 Nm.
Page 583 of 947
Fuel Tank and Lines (10.01)
Fuel (10.00)10-1-2 Workshop Manual May 2007
Fuel (10.00)
Fuel Tank and Lines (10.01)
Description
This vehicle uses a return less fuel system in which the fuel pump, controlled by the fuel pump driver module, is run to
supply fuel through one in-tank filter to the fuel rail (Refer to ’Fuel Charging System (03.04)’, page 3-5-1). A pressure senso r
and a temperature sensor are fitted on th e primary fuel rail. The fuel pump speeds are varied as required to regulate the
fuel pressure in the fuel rails.
$ G G Q R L Q L O O X V W U D W R U
6 D Y H D V S G I
5 H R S H Q L Q S K R W R V K R S D Q G V D Y H D V G S L S G I
3 X P S
) X H O ) L O W H U
) X H O 5 D L O V ) X H O 3 X P S
' U L Y H U 0 R G X O H
) L O O / L P L W 9 H Q W 9 D O Y H
( O H F W U L F D O
& R Q Q H F W R U
Page 584 of 947
Fuel Tank and Lines (10.01)
Fuel (10.00)
May 2007 Workshop Manual 10-1-3
Fuel Tank
The fuel tank incorporates a single filler neck and check valve, internal fuel pump, internal fuel filter, a sender unit and an
‘on board refuelling vapour recovery’ system.
Fuel Pumps
) X H O 3 X P S
The modular fuel pump is immersed in the base of the fuel
tank. The pump can deliver up to 150 litres/hour. The in-
tank fuel line connects to the external line using a quick-fit
connector in the base of the fuel tank. During normal running, pressu
rised fuel from each fuel
pump passes from the tank, through an 3 micron in-tank fuel
filter to one of the two fuel rails on the engine.
Fuel temperature is measured on the primary fuel rail. If fuel
temperature becomes excessive, the fuel pressure is
increased to prevent fuel vaporisation (boiling).
Fuel pressure is measured by sensors on each fuel rail. The
fuel pressure to each rail is regulated as required by
continuously changing the run speed of the associated fuel
pump. Maximum pressure in the system is limited to 5.3 bar
by in-tank pressure regulators.
A constant head of fuel is maintained in the fuel pump
modules to ensure that the pumps cannot run dry in a ‘low
fuel’ situation.
) X H O 3 X P S
) X H O / L P L W 9 H Q W 9 D O Y H 5 R O O 2 Y H U 9 D O Y H
+ L J K 3 U H V V X U H ) H H G I U R P 5 + 6 3 X P S ) L O O H U 1 H F N
& K H F N 9 D O Y H - H W 3 X P S / R Z 3 U H V V X U H
) H H G W R W K H 6 Z L U O 3 R W
Page 585 of 947
Fuel Tank and Lines (10.01)
Fuel (10.00)10-1-4 Workshop Manual May 2007
Jet Pumps
Fuel feed from the fuel pumps is split three ways:
1. Feed to the fuel rails.
2. Feed to the swirl pot jet pump (integral to the FDM).
3. Feed to the externally mounted jet pump (LHS). These pumps ensure that the appropriate pump swirl
pot is maintained with fuel under severe dynamic
conditions.
Filler Neck and Check Valve
Incoming fuel passes through a check valve at the base of the
filler neck. This valve is normally held closed by light spring
pressure. The valve opens under the pressure of incoming
fuel and closes again when fuel flow ceases. The check valve
prevents surging of fuel in the filler neck.
The filler neck also forms part of the on-board refuelling
vapour recovery system. Incoming fuel forms a liquid seal in
the filler neck. Thus any air displaced during fuel tank filling
cannot escape via the filler neck.
- H W 3 X P S $ V V \
& K H F N 9 D O Y H
6 H D O ) R U P H G L Q ) L O O H U 1 H F N
Page 586 of 947
Fuel Tank and Lines (10.01)
Fuel (10.00)
May 2007 Workshop Manual 10-1-5
Va l v e s a n d S e n s o r s
( O H F W U L F D O
& R Q Q H F W R U 5 R O O 2 Y H U
9 D O Y H ) X H O / H Y H O
9 H Q W 9 D O Y H 5 R O O 2 Y H U 9 D O Y H
Fuel Limit Vent Valve (FLVV)
This valve contains a float which rises to cut off the path for
displaced air when the fuel level rises towards maximum
during fuel filling. This causes a rapid pressure build up in
the tank which triggers the cut-off valve in the fuel delivery
nozzle. This discourages overfilling of the fuel tank.
The FLVV also includes an over pressure relief valve set at
about 2 psi to vent the tank if all other vents fail.
Roll Over Valves
The roll over valves purpose is to vent the highest point of
the tank. If the tank is grossly overfilled (e.g. many clicks over
the normal filler nozzle cut-off), the FLVV will suffer a
hydraulic lock. The roll over vent valve allows venting of the
tank at the highest possible level in this situation.
All three valves allow the tank to breath until it is inverted
when they will close to prevent fuel spill. The fuel level vent
valve controls the fuel height of the tank by creating a
pressure spike inside the tank which shuts of the fill nozzle.
If the vehicle is inverted in an accident, this valve will close
to prevent leakage of liquid fuel.
Fuel System Schematic
3 R V L W L Y H F U D Q N F D V H Y H Q W L O D W L R Q
( Q J L Q H H P L V V L R Q Y D F X X P F R Q W U R O
6 H U Y L F H S R U W
3 X U J H Y D O Y H
& D U E R Q F D Q L V W H U
5 R O O R Y H U Y D O Y H
) L O O O L P L W Y H Q W Y D O Y H
/ H D N G H W H F W L R Q P R G X O H
% U D N H E R R V W H U / + ' V K R Z Q
3 X U J H O L Q H
3 D U W O R D G E U H D W K H U
6 H F R Q G D U \ D L U
Page 587 of 947
Fuel Tank and Lines (10.01)
Fuel (10.00)10-1-6 Workshop Manual May 2007
Evaporative Loss System
Fuel vapour is displaced from the fuel tank during filling.
Vapour is also displaced due to fuel evaporation in higher
temperatures. Displaced fuel vapour is absorbed in the
carbon canister filter located on top of the fuel tank.
During normal engine running , absorbed fuel vapour is
purged from the carbon canister and mixed with the normal
fuel/air charge in the inlet manifold.
System Operation
Displaced fuel vapour leaves th e fuel tank via the normally
open fuel level vent valve and the roll over valves. It passes
through the carbon canister where fuel hydrocarbons are
absorbed. Clean air leaves the system via the normally open
canister vent valve. This valve is only closed during
diagnostic pressure testing of the fuel system.
During normal engine running, the single vapour
management valve in the engine bay is periodically opened,
when negative pressure exists in the intake manifold,
allowing fresh air flow into the open canister vent valve,
through the carbon canister, through the vapour
management valve and into the primary inlet manifold. This
fresh air flow progressively purges any absorbed fuel vapour
from the carbon canister.
Fuel Tank Vents and Control Valves
On-Board Refuelling Vapour Recovery
All of the vapour displaced from the tank by refuelling passes
through a series of valves and through a carbon canister. This
filters out and stores all the fuel vapour and clean air exits the
carbon canister port.
9 D S R X U
0 D Q D J H P H Q W 9 D O Y H 7 R ) X H O 7 D Q N 7 R 6 H U Y L F H
3 R U W
7 R & D U E R Q
) L O W H U
7 R & D U E R Q ) L O W H U
& D Q L V W H U & O R V H 9 D O Y H
& D U E R Q & D Q L V W H U 5 R O O 2 Y H U
9 H Q W 9 D O Y H
5 R O O 2 Y H U
9 H Q W 9 D O Y H ) X H O / H Y H O
9 H Q W 9 D O Y H
9 D S R X U
I U R P 7 D Q N