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]
C
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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
.
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
SYSTEM
ECK-27
< SYSTEM DESCRIPTION >
[K9K]
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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-
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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