DCT Controller

Dual clutch transmission controller

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Libraries:
Powertrain Blockset / Transmission / Transmission Controllers

Description

The DCT Controller block implements a dual clutch transmission (DCT) controller. You can specify the clutch open, close, and synchronization timing parameters. The block determines the clutch commands using integrator-based timers and latching logic that is based on the specified timing parameters and gear request.

Examples

Conventional Vehicle Reference Application

Simulate a full vehicle model with an internal combustion engine, transmission, and associated powertrain control algorithms.

Open Example

Ports

Inputs

GearReq — Gear number to engage

scalar

Gear number request, G_req.

Output

Info — Bus signal

bus

Bus signal containing these block calculations.

Signal	Description	Variable
GearReq	Gear number request	Greq
GearEngd	Nominal gear commanded by the controller	Go
GearEffct	Effective gear	NA
CltchACmd	Clutch pressure command for odd-numbered gears, between 0 and 1	NA
CltchBCmd	Clutch pressure command for even-numbered gears, between 0 and 1	NA

NomGear — Nominal gear for shifting

scalar

Nominal gear for shifting. The Dual Clutch Transmission block uses this signal for the smooth application of inertial, efficiency, gear ratio, and damping parameters.

CltchACmd — Command for odd-numbered gears

scalar

Clutch pressure command for odd-numbered gears, between 0 and 1.

CltchBCmd — Command for even-numbered gears

scalar

Clutch pressure command for even-numbered gears, between 0 and 1.

Parameters

Initial gear, G_o — Engaged gear

0 (default) | scalar

Initial gear to engage, G_o.

Clutch actuation time, tc — Time

.1 (default) | scalar

Time required to engage and disengage the clutch during shift events, t_c, in s.

Synchronizer time, ts — Time

.01 (default) | scalar

Time required for gear selection and synchronization, t_s, in s.

Sample period, dt — Time

-1 (default) | scalar

Sample period, dt, in s.

Start simulation with clutch locked — Select to initially lock clutch

off (default) | on

Selecting this parameter initially locks the clutch.

Start simulation with synchronizer locked — Select to initially lock synchronizer

off (default) | on

Selecting this parameter initially locks the synchronizer.

Extended Capabilities

C/C++ Code Generation
Generate C and C++ code using Simulink® Coder™.

Version History

Introduced in R2017a