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Thread: CVT owners... what is "Idle Neutral Logic"? And what is it like to drive?

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    Administrator MetroMPG's Avatar
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    CVT owners... what is "Idle Neutral Logic"? And what is it like to drive?

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    The Mitsu press release from the New York Auto Show Mirage launch this morning mentioned a feature of the CVT transmission that I hadn't seen before: idle neutral logic.

    Can anyone tell me what this is?

    I'm assuming it means that the transmission goes into neutral whenever you stop, and that's the reason why the CVT also has Hill Start Assist so you don't roll backwards when releasing the brakes on a grade.

    If that's what it is, it must be another fuel saving feature to reduce load on the engine when stopped, rather than remaining in gear, constantly trying to drive the car forward while your foot is on the brake.

    Is that about right?

    ====

    Update: see post #22 for the list of conditions when the feature is active or not.


        __________________________________________

        click to view fuel log View my fuel log 2014 Mirage base ES 1.2 manual: 54.0 mpg (US) ... 23.0 km/L ... 4.4 L/100 km ... 64.9 mpg (Imp)


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    Senior Member talldino's Avatar
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    According to Mitsubishi Service sheet 411 (2012) you are absolutely right:

    Idle-Neutral Logic

    This system shifts the transmission into neutral when the vehicle comes to a complete stop and the brakes are applied. By shifting into neutral, Idle Neutral Logic lessens the amount of power needed to turn the transmission thus reducing drag on the engine. Less power equals less gas required and conserves fuel.

    Source: http://touch.mservice411.com/c/idle-neutral-logic

        __________________________________________

        click to view fuel log View my fuel log 2013 Space Star 'Instyle' 1.2 automatic: 48.5 mpg (US) ... 20.6 km/L ... 4.9 L/100 km ... 58.2 mpg (Imp)


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    Administrator MetroMPG's Avatar
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    Aha. Merci, monsieur.

    On to part two (added to the thread title):

    What is it like to drive?

    Does it stay in neutral and wait until you press the accelerator again before going back into gear? Doesn't that create a delay in starting up compared to a "regular" automatic transmission? Is it a smooth transition?

    Will the car "creep" forward when you let your foot off the brake, or do you have to give it a little gas?

    Enquiring minds want to know...

        __________________________________________

        click to view fuel log View my fuel log 2014 Mirage base ES 1.2 manual: 54.0 mpg (US) ... 23.0 km/L ... 4.4 L/100 km ... 64.9 mpg (Imp)


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    Senior Member talldino's Avatar
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    During my test-drive I noticed that there was almost no 'creeping'. Neither in 'forward' nor in 'reverse'.

        __________________________________________

        click to view fuel log View my fuel log 2013 Space Star 'Instyle' 1.2 automatic: 48.5 mpg (US) ... 20.6 km/L ... 4.9 L/100 km ... 58.2 mpg (Imp)


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    Administrator Daox's Avatar
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    I wonder if, as a fuel economy modification, one could setup a switch to engage this neutral logic at will? I would also wonder if that would do any damage to the transmission due to lack of lubrication as is the case for some automatic transmissions...

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        click to view fuel log View my fuel log 2015 Mirage ES 1.2 automatic: 49.0 mpg (US) ... 20.8 km/L ... 4.8 L/100 km ... 58.8 mpg (Imp)


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    Administrator MetroMPG's Avatar
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    (I have to admit I wondered the same thing.)

        __________________________________________

        click to view fuel log View my fuel log 2014 Mirage base ES 1.2 manual: 54.0 mpg (US) ... 23.0 km/L ... 4.4 L/100 km ... 64.9 mpg (Imp)


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    So that explains why when I release the brake, the car surges forward instead of slowly creeping like other TC autos.

    But so far seems like it has strange engagements. Let me test it out later and get back to you guys =)

        __________________________________________

        click to view fuel log View my fuel log 2013 Mirage (Malaysia) GS 1.2 automatic: 44.6 mpg (US) ... 19.0 km/L ... 5.3 L/100 km ... 53.6 mpg (Imp)


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    Member AntInOz's Avatar
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    I have never noticed my Mirage creep forwards, in fact it does seem to be a little more laggy off the line then other auto's including my CVT Outlander. Hill Assist you can definitely feel it holding the brakes.

        __________________________________________

        click to view fuel log View my fuel log 2013 Mirage LS (Australia) 1.2 automatic: 34.8 mpg (US) ... 14.8 km/L ... 6.8 L/100 km ... 41.8 mpg (Imp)


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    but it doesn't seem to kick in everytime. sometime during a jam, after a few stop-gos, then stop at traffic light, it will not work.

        __________________________________________

        click to view fuel log View my fuel log 2013 Mirage (Malaysia) GS 1.2 automatic: 44.6 mpg (US) ... 19.0 km/L ... 5.3 L/100 km ... 53.6 mpg (Imp)


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    It could be part of the "logic" that it doesn't go to neutral every time the car stops if it has been started/stopped several times in a short amount of time/distance.

    Some hybrids and engine stop/start systems are programmed like this: they will shut the engine down for the initial stop, but if you move ahead again (engine restart) only a short distance, it may not shut down again until you've gone above a certain speed threshold. Otherwise the feature may become annoying to the driver.

    The neutral-to-start engagement of the Mirage CVT may be programmed the same way for the same reason.

    I'm interested in seeing this feature first hand.


        __________________________________________

        click to view fuel log View my fuel log 2014 Mirage base ES 1.2 manual: 54.0 mpg (US) ... 23.0 km/L ... 4.4 L/100 km ... 64.9 mpg (Imp)


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