Idle

Idle settings

Idle control mode

Idle Detection Thresholds

TPS threshold

Below this throttle position, the engine is considered idling. If you have an electronic throttle, this checks accelerator pedal position instead of throttle position, and should be set to 1-2%.

Force Idle State Below DriverThrottleIntent Threshold

Force idle STATE below DriveIntent threshold.

Force Idle Ignition ONLY Below DriverThrottleIntent Threshold

Force idle ignition (delta target only) below DriverThreshold threshold, only for ignition timing

Idle force delayed by DFCO

Do not force idle ignition while DFCO is active for either of the above.

Delta target rpm smoothing factor

Smoothing factor for delta target rpm ignition adjustment

RPM upper limit

How far above idle speed do we consider idling, i.e. coasting detection threshold. For example, if target = 800, this param = 200, then anything below 1000 RPM is considered idle.

RPM deadzone

If the RPM closer to target than this value, disable closed loop idle correction to prevent oscillation

Max vehicle speed

Above this speed, disable closed loop idle control. Set to 0 to disable (allow closed loop idle at any speed).

Open Loop Idle

A/C adder

Additional idle % while A/C is active

A/C RPM target

Idle target speed when A/C is enabled. Some cars need the extra speed to keep the AC efficient while idling.

Transmission idle up adder

Additional idle % while transmission idle up is active

Transmission idle up RPM target

Idle target speed when transmission idle up is enabled. Some transmissions need extra idle speed when engaged.

Fan #1 adder

Additional idle % when fan #1 is active. In PWM mode this is scaled according to PWM %

Fan #2 adder

Additional idle % when fan #2 is active. In PWM mode this is scaled according to PWM %

Closed Loop Idle

P-factor

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I-factor

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D-factor

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Min

Output Min Duty Cycle

Max

Output Max Duty Cycle

iTerm Min

iTerm min value

iTerm Max

iTerm max value

PID Extra for low RPM

Increases PID reaction for RPM<target by adding extra percent to PID-error

Use IAC PID Multiplier Table

This flag allows to use a special 'PID Multiplier' table (0.0-1.0) to compensate for nonlinear nature of IAC-RPM controller

Extra Idle Features

Separate idle ignition table

This activates a separate ignition timing table for idle conditions, this can help idle stability by using ignition retard and advance either side of the desired idle speed. Extra advance at low idle speeds will prevent stalling and extra retard at high idle speeds can help reduce engine power and slow the idle speed.

Use idle ignition table while coasting

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Separate idle VE table

This activates a separate fuel table for Idle, this allows fine tuning of the idle fuelling.

Override Idle VE table load axis

Allows you to change the default load axis used for the VE table, which is typically MAP (manifold absolute pressure).

Ramp target RPM on return to idle

Ramp the idle target down from the entry threshold over N seconds when returning to idle. Helps prevent overshooting (below) the idle target while returning to idle from coasting.

Ramp target duration

idle return target ramp duration

Separate idle tables for cranking taper

This uses separate ignition timing and VE tables not only for idle conditions, also during the postcranking-to-idle taper transition (See also afterCrankingIACtaperDuration).

Separate coasting idle table

Override the IAC position during overrun conditions to help reduce engine breaking, this can be helpful for large engines in light weight cars or engines that have trouble returning to idle.

Dashpot coasting-to-idle Initial idle Adder

This value is an added for base idle value. Idle Value added when coasting and transitioning into idle.

Dashpot coasting-to-idle Hold time

How long initial idle adder is held before starting to decay.

Dashpot coasting-to-idle Decay time

How long it takes to remove initial IAC adder to return to normal idle.

Dashpot coasting-to-idle Initial idle Adder(AC ON)

This value is an added for base idle value(AC ON). Idle Value added when coasting and transitioning into idle.

Dashpot coasting-to-idle Hold time(AC ON)

How long initial idle adder is held before starting to decay(AC ON).

Dashpot coasting-to-idle Decay time(AC ON)

How long it takes to remove initial IAC adder to return to normal idle(AC ON).

CAN box extra idle-up target RPM adder

can box idle up demand

CAN box extra idle-up % adder

can box idle up demand %

Use Idle Timing Target Error curve

Use Idle Target Error Delta timing curve

Idle Timing Target Error is Adder

0 = replace, 1 = add

Enable closed loop idle ignition timing

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Idle hardware

Use Stepper

This setting should only be used if you have a stepper motor idle valve and a stepper motor driver installed.

Electronic throttle idle range

This sets the range of the idle control on the ETB. At 100% idle position, the value specified here sets the base ETB position.

Idle Valve Hardware

Solenoid

Idle Solenoid Primary output

?highlight=class~outputs

Double Solenoid Mode

Subaru/BMW style where default valve position is somewhere in the middle. First solenoid opens it more while second can close it more than default position.

Idle Solenoid Secondary output

Some Subaru and some Mazda use double-solenoid idle air valve ?highlight=class~outputs

Idle Solenoid output(s) Mode

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Idle Solenoid Frequency

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Stepper

Drive stepper with dual H bridges

If enabled we use two H-bridges to drive stepper idle air valve

Drive stepper with PushPull outputs

If enabled we use four Push-Pull outputs to directly drive stepper idle air valve coils

Stepper reaction time

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Stepper total steps

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Stepper parking extra steps, %

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Force parking every restart

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Stepper Controller Hardware

Idle Stepper Step Pin

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Idle Stepper Dir Pin

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Idle Stepper Dir Pin Mode

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Idle Stepper Enable Pin

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Idle Stepper Enable Pin Mode

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Stepper H-Bridge Hardware

Inverted driver pins

Enable if DC-motor driver (H-bridge) inverts the signals (eg. RZ7899 on Hellen boards)

H-Bridge Hardware No1

No1 Direction #1

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No1 Direction #2

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No1 Control

Acts as EN pin in two-wire mode

No1 Disable

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H-Bridge Hardware No2

No2 Direction #1

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No2 Direction #2

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No2 Control

Acts as EN pin in two-wire mode

No2 Disable

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Stepper Direct-Drive Hardware

Stepper A+

stepper_raw_output 1 ?highlight=class~outputs

Stepper A-

stepper_raw_output 2 ?highlight=class~outputs

Stepper B+

stepper_raw_output 3 ?highlight=class~outputs

Stepper B-

stepper_raw_output 4 ?highlight=class~outputs

Micro-Stepping

Stepping Mode

For micro-stepping, make sure that PWM frequency (etbFreq) is high enough

Min. Duty Cycle

Use to limit the current when the stepper motor is idle, not moving (100% = no limit)

Max. Duty Cycle

Use to limit the max.current through the stepper motor (100% = no limit)

Open Loop Idle

A/C adder

Additional idle % while A/C is active

A/C RPM target

Idle target speed when A/C is enabled. Some cars need the extra speed to keep the AC efficient while idling.

Transmission idle up adder

Additional idle % while transmission idle up is active

Transmission idle up RPM target

Idle target speed when transmission idle up is enabled. Some transmissions need extra idle speed when engaged.

Fan #1 adder

Additional idle % when fan #1 is active. In PWM mode this is scaled according to PWM %

Fan #2 adder

Additional idle % when fan #2 is active. In PWM mode this is scaled according to PWM %

Transmission Idle Up

Transmission idle up switch

Transmission idle up switch input ?highlight=class~switch_inputs

Transmission idle up switch mode

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Transmission idle up adder

Additional idle % while transmission idle up is active

Transmission idle up RPM target

Idle target speed when transmission idle up is enabled. Some transmissions need extra idle speed when engaged.

Idle Target RPM from CLT

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Idle Position from CLT vs Idle Target RPM

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Idle After Start (Crank-to-Run) Taper vs CLT

Closed-loop Ignition idle timing

Proportional gain

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Integral gain

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Derivative gain

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Min adjustment (retard)

Output Min Duty Cycle

Max adjustment (advance)

Output Max Duty Cycle

Soft entry time

When entering idle, and the PID settings are aggressive, it's good to make a soft entry upon entering closed loop

Target Delta ignition idle timing

Idle PID multiplier

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Idle extra PID

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Coasting Idle position

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Idle VE

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Idle Target RPM Ignition advance

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Rotational Idle

Enable

Enable rotational idle.

Pin

Pin that activates the rotational idle. ?highlight=class~switch_inputs

Pin Mode

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Stop STFT for rotational idle (no fuel trim)

Zero STFT for rotational idle.

Rotational cut spark

Rotational cut spark.

Rotational cut fuel

Rotational cut fuel.

Enable automatic engagement for TPS

Enable automatic engagement of rotational idle.

Engage rotational idle below this Driver Intent(TPS/PPS)

Engage rotational idle under this Driver Intent.

Enable auto engage for CLT

Enable Rotational Idle Auto engage CLT.

Auto engage above this CLT

Rotational Idle Auto engage CLT.

Minimum CLT

Minimum CLT for the rotational idle.

Maximum TPS/PPS (0 to disable)

Disengage rotational idle above this Driver Intent.

Minimum RPM

Minimum RPM for the rotational idle.

Maximum RPM

Maximum RPM for the rotational idle.

Add idle % idle output

Add air to the idle.

Add/Remove air percentage

Percentage of air to add/remove to the idle.

Override ETB Idle Authority (0 to disable override)

Override the ETB authority for the rotational idle.

Fuel Multiplier (1.5 = 150% , 0 to 2.5)

Rotational idle fuel multiplier

Rotational Absolute Timing (-30 = 30 ATDC, 0 = original timing, 10 - -100)

Rotational idle absolute ignition (-20 = atdc 20 degrees)

Old rotational idle logic (true = old, false = new) - see tooltip

Old rotational idle logic, New logic is based on global spark counter, the three layers of accumulators and adders run at the same time, offset shifts the pattern forward or backward with relation to each other, this should allow different sound patterns by combining different offsets;"true = old, false = new

Rotational Fuel Offset (should be 0, this shifts fuel cut in relation to ignition signal)

Rotational idle fuel offset (should be 0, this shifts fuel cut in relation to ignition signal). At 0, in sequential injection/ignition the fuel pulse is cut before the ignition pulse. so fuel is not wasted.

Accumulator Max 1

Max value for the rotational idle accumulator to skip

Accumulator Adder 1

Accumulator adder

Accumulator Offset 1

Rotational pattern shift #1

Accumulator Max 2

Max value for the rotational idle accumulator to skip

Accumulator Adder 2

Accumulator adder

Accumulator Offset 2

Rotational pattern shift #2

Accumulator Max 3

Max value for the rotational idle accumulator to skip

Accumulator Adder 3

Accumulator adder

Accumulator Offset 3

Rotational pattern shift #3