Nissan Qashqai J11. Manual - part 366

 

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Nissan Qashqai J11. Manual - part 366

 

 

ECK-24

< SYSTEM DESCRIPTION >

[K9K]

COMPONENT PARTS

Reverse/Neutral Position Switch

INFOID:0000000010501851

Reverse/neutral position switch is ON when the selector lever is Neutral position. ECM detects the position
because the continuity of the line (the ON) exists.

SYSTEM

ECK-25

< SYSTEM DESCRIPTION >

[K9K]

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SYSTEM

ENGINE CONTROL SYSTEM

ENGINE CONTROL SYSTEM : System Diagram

INFOID:0000000010289642

ENGINE CONTROL SYSTEM : Vacuum Hose Drawing

INFOID:0000000010289643

For vacuum hose drawing, refer to 

ECK-398, "Vacuum Layout"

.

JSBIA5002GB

ECK-26

< SYSTEM DESCRIPTION >

[K9K]

SYSTEM

ENGINE CONTROL SYSTEM : System Description

INFOID:0000000010289644

ECM controls the engine by various functions.

ENGINE SPEED CONTROL

ENGINE SPEED CONTROL : System Description

INFOID:0000000010471219

SYSTEM DESCRIPTION

The engine speed control consists of the following functions:
• Curative anti-jerk
• Idle speed control
• Engine speed limitation
• Engine state

CURATIVE ANTI-JERK

This function aims to smooth the engine speed through torque corrections out of idle engine speed regulation.
The torque correction is made by the anti-jerk function to damp the engine speed vibrations caused by the
drive-line vibrations.

IDLE SPEED CONTROL

ECM calculates the engine idle speed set point and maintains the engine speed in order to follow the set point.
The engine idle speed set-point is computed for the following load and signal:
• Post treatment
- Diesel particulate filter
• Electric consumers
- Cooling fan
- Coolant heater
- Power window

Function

Reference

Engine speed control

ECK-26, "ENGINE SPEED CONTROL : System Description"

Powertrain coordination control

ECK-27, "POWERTRAIN COORDINATION CONTROL : System 
Description"

Turbocharger boost control

ECK-28, "TURBOCHARGER BOOST CONTROL : System De-
scription"

EGR system

ECK-28, "EGR SYSTEM : System Description"

Throttle control

ECK-29, "THROTTLE CONTROL : System Description"

Swirl control system

ECK-29, "SWIRL CONTROL SYSTEM : System Description"

Engine torque control

ECK-30, "ENGINE TORQUE CONTROL : System Description"

Combustion control

ECK-32, "COMBUSTION CONTROL : System Description"

After treatment system

ECK-33, "AFTER TREATMENT SYSTEM : System Description"

Cooling fan control

ECK-34, "COOLING FAN CONTROL : System Description"

Thermostat control

ECK-35, "THERMOSTAT CONTROL : System Description"

Glow control

ECK-35, "GLOW CONTROL : System Description"

Oil control system

ECK-36, "OIL CONTROL SYSTEM : System Description"

ASCD (Automatic Speed Control Device)

ECK-36, "AUTOMATIC SPEED CONTROL DEVICE (ASCD) : 
System Description"

Speed limiter

ECK-37, "SPEED LIMITER : System Description"

Gear shift indicator system

ECK-38, "GEAR SHIFT INDICATOR SYSTEM : System Descrip-
tion"

Stop/start system

ECK-39, "STOP/START SYSTEM : System Description"

Energy management system

ECK-46, "ENERGY MANAGEMENT SYSTEM : System Descrip-
tion"

CAN communication

ECK-46, "CAN COMMUNICATION : System Description"

SYSTEM

ECK-27

< SYSTEM DESCRIPTION >

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- Air heater (air conditioning system)
- Alternator output current
• Automatic transmission
- Automatic transmission idle speed set point function (according to coolant temperature)
- Automatic transmission idle speed increase request
• Mechanical consumers
- Air conditioning
- Power steering
• Diagnosis and protection
- Diagnosis
- Engine protection by oil temperature
- CONSULT function
- Intake manifold pressure sensor signal
The final engine idle speed set point is computed from each comsumer

s engine idle speed set point:

• The final corrective torque of the Idle Speed Regulation is obtained taking into account proportional, integral,

and derivative corrections.

ENGINE SPEED LIMITATION

ECM calculates the maximum engine speed set point and controls the maximum engine speed in order to fol-
low the set point.
• Fail-safe mode
• Maximum available engine speed

ENGINE STATE

ECM calculates the engine state from detected engine speed:
• Engine running
- Driving state
- Idling state
• Engine stalled
- Initial state
- Stalled state

POWERTRAIN COORDINATION CONTROL

POWERTRAIN COORDINATION CONTROL : System Description

INFOID:0000000010471220

SYSTEM DESCRIPTION

The powertrain coordination can be explained by following:
• Powertrain coordination inputs
• Preventive anti-jerk
• Gear shift indicator (for details, refer to 

ECK-38, "GEAR SHIFT INDICATOR SYSTEM : System Descrip-

tion"

.)

POWERTRAIN COORDINATION INPUTS

ECM detects following signals necessary to decide the torque set point:
• Gear position
• Torque request from automatic transmission
• Torque request from ABS system
• Brake pedal operation
• Status of Cruise Control System or Speed Limiter

PREVENTIVE ANTI-JERK

The main objective of the preventive anti-jerk function is to decrease discomforts of driver during depress the
accelerator pedal and during release the accelerator pedal.
The abrupt change of torque are delivered by engine excites a torsional natural frequencies of drive-line. It
causes vehicle jerking and acceleration fluctuations. And they are causes of perception and assessment of
performance and comfort for driver and the passengers.
The purpose of this function is to limit drive-line torque excitations. In fact, the engine torque set point is filtered
according to requirements of driveability.

TURBOCHARGER BOOST CONTROL

 

 

 

 

 

 

 

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