Nissan Juke F15. Manual — part 311
SYSTEM
EC-57
< SYSTEM DESCRIPTION >
[MR FOR NISMO RS MODELS]
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The ignition timing is controlled by the ECM to maintain the best air-fuel ratio for every running condition of the
engine. The ignition timing data is stored in the ECM.
The ECM receives information such as the injection pulse width and camshaft position sensor (PHASE) sig-
nal. Computing this information, ignition signals are transmitted to the power transistor.
During the following conditions, the ignition timing is revised by the ECM according to the other data stored in
the ECM.
• At starting
• During warm-up
• At idle
• At low battery voltage
• During acceleration
The knock sensor retard system is designed only for emergencies. The basic ignition timing is programmed
within the anti-knocking zone, if recommended fuel is used under dry conditions. The retard system does not
operate under normal driving conditions. If engine knocking occurs, the knock sensor monitors the condition.
The signal is transmitted to the ECM. The ECM retards the ignition timing to eliminate the knocking condition.
INTAKE VALVE TIMING CONTROL
INTAKE VALVE TIMING CONTROL : System Diagram
INFOID:0000000012197672
INTAKE VALVE TIMING CONTROL : System Description
INFOID:0000000012197673
INPUT/OUTPUT SIGNAL CHART
JPBIA4760GB
Sensor
Input signal to ECM
ECM function
Actuator
Crankshaft position sensor (POS)
Engine speed and piston position
Intake valve tim-
ing control
Intake valve timing con-
trol solenoid valve
Camshaft position sensor (PHASE)
Engine oil temperature sensor
Engine oil temperature
Engine coolant temperature sensor
Engine coolant temperature
Combination meter
CAN commu-
nication
Vehicle speed
EC-58
< SYSTEM DESCRIPTION >
[MR FOR NISMO RS MODELS]
SYSTEM
SYSTEM DESCRIPTION
This mechanism hydraulically controls cam phases continuously with the fixed operating angle of the intake-
valve.
The ECM receives signals such as crankshaft position, camshaft position, engine speed, and engine coolant-
temperature. Then, the ECM sends ON/OFF pulse duty signals to the intake valve timing (IVT) control sole-
noid valve depending on driving status. This makes it possible to control the shut/open timing of the intake
valve to increase engine torque in low/mid speed range and output in high-speed range.
EXHAUST VALVE TIMING CONTROL
EXHAUST VALVE TIMING CONTROL : System Diagram
INFOID:0000000012197674
EXHAUST VALVE TIMING CONTROL : System Description
INFOID:0000000012197675
INPUT/OUTPUT SIGNAL CHART
JPBIA5034GB
JPBIA4761GB
SYSTEM
EC-59
< SYSTEM DESCRIPTION >
[MR FOR NISMO RS MODELS]
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SYSTEM DESCRIPTION
This mechanism hydraulically controls cam phases continuously with the fixed operating angle of the exhaust
valve.
The ECM receives signals such as crankshaft position, camshaft position, engine speed, and engine oil tem-
perature. Then, the ECM sends ON/OFF pulse duty signals to the exhaust valve timing (EVT) control solenoid
valve depending on driving status. This makes it possible to control the shut/open timing of the exhaust valve
to increase engine torque and output in a range of high engine speed.
TURBOCHARGER BOOST CONTROL
Sensor
Input signal to ECM
ECM function
Actuator
Crankshaft position sensor (POS)
Engine speed and piston position
Exhaust valve
timing control
Exhaust valve timing control
solenoid valve
Camshaft position sensor (PHASE)
Engine oil temperature sensor
Engine oil temperature
Exhaust valve timing control position
sensor
Exhaust valve timing signal
Combination meter
CAN commu-
nication
Vehicle speed signal
JPBIA5035GB
EC-60
< SYSTEM DESCRIPTION >
[MR FOR NISMO RS MODELS]
SYSTEM
TURBOCHARGER BOOST CONTROL : System Diagram
INFOID:0000000012197676
TURBOCHARGER BOOST CONTROL : System Description
INFOID:0000000012197677
INPUT/OUTPUT SIGNAL CHART
SYSTEM DESCRIPTION
Depending on driving conditions, the ECM performs ON/OFF duty control of the turbocharger boost control
solenoid valve and controls the boost by adjusting the pressure to the diaphragm of the boost control actuator.
When driving conditions demand an increase in boost, the ECM prolongs the ON time of the turbocharger
boost control solenoid valve and moves the boost control valve towards the closing direction by reducing the
pressure in the diaphragm of the boost control actuator. The emission gas to the turbine wheel is then
increased. When driving conditions demand a decrease in boost, the ECM shortens the ON time of the turbo-
charger boost control solenoid valve and moves the boost control valve towards the opening position by
increasing the pressure in the diaphragm of the boost control actuator. The emission bypassing to the turbine
wheel is then increased. Thus, by performing the most optimal boost control, the ECM improves engine output
and response.
NOTE:
The boost varies depending on the vehicle and driving conditions.
BOOST CONTROL ACTUATOR LINE DRAWING
JPBIA5244GB
Sensor
Input signal to ECM
ECM function
Actuator
Crankshaft position sensor (POS)
Engine speed
Turbocharger boost
control
Turbocharger boost control
solenoid valve
↓
Boost control actuator
Camshaft position sensor (PHASE)
Mass air flow sensor
Amount of intake air
Intake air temperature sensor 1
Intake air temperature
Engine coolant temperature sensor
Engine coolant temperature
Throttle position sensor
Throttle position
Accelerator pedal position sensor
Accelerator pedal position
Turbocharger boost sensor
Turbocharger boost
Intake air temperature sensor 2
Intake air temperature
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