CvtGearbox

The CVT gear box (device name "cvtGearbox") is a model of a continuously variable transmission including a one way hill holding viscous clutch, and a parking lock. Unlike an automatic gearbox, the CVT changes effective gear ratio continuously to maintain a target engine speed. In a Powertrain, it can be placed behind a torqueConverter, and should have a shaft, differential, rangeBox, or splitShaft connected to it.

Jbeam Properties

Name	Type	Optional	Default Value	Description
minGearRatio	number	true	0.5	This is the tallest gear ratio available to the gearbox.
maxGearRatio	number	true	2.5	This is the shortest gear ratio available to the gearbox.
oneWayViscousCoef	number	true	5	This value controls how stiff the hill holding viscous clutch is. A higher value will make the vehicle less likely to creep backwards on a hill.
oneWayViscousTorque	number	true	=onewayViscousCoef*20	The upper limit for hill holding torque, used for stability reasons.
parkLockTorque	number	true	1000	The upper limit for the parking lock torque. If exceeded, the parking lock will slip.
parkLockSpring	number	true	=parkLockTorque	The stiffness of the parking lock spring. Too high may cause instability.
friction	number	true	0	The friction torque applied to the input side of the gearbox.

Examples

Here is an example of the required powertrain section, along with the additional section for the properties.

    "powertrain": [
        ["type", "name", "inputName", "inputIndex"],
        ["cvtGearbox", "gearbox", "torqueConverter", 1],
    ],
    "gearbox": {
        "minGearRatio":0.8,
        "maxGearRatio":2.7,
        "parkLockTorque":2000,
        "oneWayViscousCoef":8,
        "friction": 1,
    },