Nissan Juke F15. Manual - part 311

 

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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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