Drivetrain and Transmission

R2026b

Transmissions, torque converters, differentials, and controllers

In powertrains, the transmission and drivetrain comprise the driveline. Transmissions convert engine torque to drive shaft torque. Drivetrains convert the drive shaft torque to axle torque. Use the transmission and drivetrain blocks to assemble drivelines for torque capacity sizing and gear ratio impact on performance.

Blocks

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Drivetrain – Couplings

	Disc Clutch	Idealized disc clutch coupler
	Gearbox	Ideal rotational gearbox
	Planetary Gear	Ideal planetary gear with sun, ring, and carrier
	Rotational Inertia	Ideal mechanical rotational inertia
	Split Torsional Compliance	Split torsional coupler
	Torque Converter	Three-part torque converter consisting of an impeller, turbine, and stator
	Torsional Compliance	Parallel spring-damper
	Two-Way Connection	Two-way connector port for subsystem

Drivetrain – Final Drive Unit and Wheels

	Limited Slip Differential	Limited differential as a planetary bevel gear
	Open Differential	Differential as a planetary bevel gear
	Transfer Case	Differential as a planetary bevel gear
	Longitudinal Wheel	Longitudinal wheel with disc, drum, or mapped brake

Transmission – Systems and Converters

	Automated Manual Transmission	Ideal automated manual transmission
	Continuously Variable Transmission	Push belt continuously variable transmission with independent radii control
	Dual Clutch Transmission	Dual clutch transmission that applies torque to the drive shaft
	Ideal Fixed Gear Transmission	Ideal fixed gear transmission without clutch or synchronization
	Torque Converter	Three-part torque converter consisting of an impeller, turbine, and stator

Transmission – Controllers

	AMT Controller	Automated manual transmission controller with clutch open, close, and synchronization timing
	CVT Controller	Continuously variable transmission controller
	DCT Controller	Dual clutch transmission controller

Featured Examples

Build Conventional Vehicle Model

Build a vehicle with an internal combustion engine using the conventional vehicle reference application.

Calibrate, Validate, and Optimize CI Engine with Dynamometer Test Harness

Simulate a compression-ignition (CI) engine and controller under a dynamometer test harness using the CI engine dynamometer reference application.

Calibrate, Validate, and Optimize SI Engine with Dynamometer Test Harness

Simulate a spark-ignition (SI) engine and controller under a dynamometer test harness using the SI engine dynamometer reference application.

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Torsional Compliance Between Motor and Gearbox

Use Rotational Inertia and Torsional Compliance blocks to model a flexible coupling between driveline components.

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