4.10. Gear Selection Controller - GearSelr

• Overview

• Functions

• Ports

• Parameters

Id	GearSelr
Version	0.4.1.0
Title	Gear Selection Controller
System	Drivetrain
Document Type	Application Software Component Specification Preview

4.10.1. Overview

The Gear Selector Controller selects the appropriate gear based on driver, vehicle requests and system status feedback. It monitors various inputs e.g. gear selector position, brake pedal status, vehicle speed, and charging system status to determine the correct gear. The component includes a state machine to manage gear transitions and ensure smooth and safe gear changes. Lastly, it provides a fault switch monitor and system health monitor to detect and identify faults.

4.10.2. Functions

Title	Description
Gear Selection Control	Determines the desired gear based on driver and vehicle requests, and controls the gear selection actuator to engage the selected gear.
Gear Selector Position Monitoring	Monitors the position of the gear selector (PRND) and provides the selected gear as an input to the gear selection control logic.

4.10.3. Ports

	Id	Direction	Data Type	Dimensions	Unit	Description	Keywords
1	Ts	Incoming	single	[1]	s		Ts
2	SwPkGearSel	Incoming	Enum: CmnenaGearSt	[1]	inherit	Expected signal: Signal from Switch pack Gear Selector Driver If signal is NA: mandatory. CmnenaGearSt (see enum for complete list)	Software Pack Gear Select
3	SwPkGearSelVld	Incoming	boolean	[1]	inherit	Expected signal: Signal from Switch Pak Gear Selector Driver validity If signal is NA: mandatory. True	Software Pack Gear Select Valid
4	BrkgGearReq	Incoming	Enum: CmnenaGearSt	[1]	inherit	Expected signal: Signal from Gear Selector Driver If signal is NA: mandatory. CmnenaGearSt (see enum for complete list)	Braking Gear Request
5	BrkgGearReqVld	Incoming	boolean	[1]	inherit	Expected signal: Signal from Gear Selector Driver If signal is NA: mandatory. True	Braking Gear Request Valid
6	HmiGearReq	Incoming	Enum: CmnenaGearSt	[1]	inherit	Expected signal: Signal from Gear Selector (alternative source, e.g. HMI) If signal is NA: CmnenaGearSt.Na	Hmi Gear Request
7	HmiGearReqVld	Incoming	boolean	[1]	inherit	Expected signal: Validity signal from Gear Selector (alternative source, e.g. HMI) If signal is NA: mandatory. False	Hmi Gear Request Valid
8	ExtGearReq	Incoming	Enum: CmnenaGearSt	[1]	inherit	Expected signal: Signal from Gear Selector (alternative source) If signal is NA: CmnenaGearSt.Na	External Gear Request
9	ExtGearReqVld	Incoming	boolean	[1]	inherit	Expected signal: Signal from Gear Selector (alternative source) If signal is NA: mandatory. True	External Gear Request Valid
10	VehSpd	Incoming	single	[1]	km/h	Expected signal: Vehicle Longitudinal speed If signal is NA: mandatory	Vehicle Speed
11	VehSpdVld	Incoming	boolean	[1]	inherit	Expected signal: Vehicle longitudinal speed valdity If signal is NA: true	Vehicle Speed Valid
12	BrkPedlIsPsd	Incoming	boolean	[1]	inherit	Expected signal: Flag to be obtained based on brake pedal command and desired deceleration level. e.g. if veh deceleration >=2m/s^2, then 1; 0 otherwise If signal is NA: mandatory according to description	Brake Pedal Is Pressed
13	ChrgSysVld	Incoming	boolean	[1]	inherit	Expected signal: Charging system validty If signal is NA: true	Charging System Valid
14	VsmSysSt	Incoming	Enum: CmnenaVehSt	[1]	inherit	Expected signal: Vehicle system status. See CmnenaVehSt for complete list If signal is NA: CmnenaVehSt.Ready	Vsm System State
15	VsmSysVld	Incoming	boolean	[1]	inherit	Expected signal: Vehicle system status validity If signal is NA: true	Vsm System Valid
16	ChrgPlugCond	Incoming	boolean	[1]	inherit	Expected signal: Charge gun detection If signal is NA: false	Charging Plug Connected
17	BrkPedVld	Incoming	boolean	[1]	inherit	Expected signal: Brake pedal validity. If signal is NA: true.	Brake Pedestrian Valid
18	DrvrPresVld	Incoming	boolean	[1]	inherit	Expected signal: Driver sat signal is valid If signal is NA: true	Driver Presence Valid
19	DrvrPresAcv	Incoming	boolean	[1]	inherit	Expected signal: Driver is sat onto driver seat If signal is NA: true	Driver Presence Active
20	InvSysGearSt	Incoming	Enum: CmnenaGearSt	[1]	inherit	Expected signal: Actual drivetrain (inverter) status If signal is NA: CmnenaGearSt. Must be in synch with request SwPkGearSel	Inverter System Gear State
21	BrkSysSt	Incoming	Enum: CmnenaGearSt	[1]	inherit	Expected signal: Actual braking system status If signal is NA: CmnenaGearSt. Must be in synch with SwPkGearSel	Brake System State
22	IgEngd	Incoming	boolean	[1]	inherit	Expected signal: Vehicle system ingition status (0 or 1) If signal is NA: true	Ignition Engaged
23	CanGearSelrOut	Outgoing	Bus: CAN_GearSelrOut_t	[-1]	inherit		Can Gear Selector Output
24	SndGearSelrOut	Outgoing	boolean	[1]	inherit		Send Gear Selector Output
25	GselrGearCmd	Outgoing	Enum: CmnenaGearSt	[1]	inherit		Gselr Gear Command
26	GselrGearSt	Outgoing	Enum: CmnenaGearSt	[1]	inherit		Gselr Gear State
27	GselrStsOut	Outgoing	Enum: CmnenaSysNotifSt	[-1]	inherit		Gselr Status Output
28	GselrGearPosnAct	Outgoing	Enum: CmnenaGearSt	[1]	inherit		Gselr Gear Position Actual
29	GselrGearSelrVld	Outgoing	boolean	[1]	inherit		Gselr Gear Selector Valid

4.10.4. Parameters

	Id	Data Type	Dimensions	Range	Unit	Description	Keywords
1	GselrDrvRvsGearCfmTiout	single	[1,1]	Min: 0, Max: 10	sec	Gear Command Confirmation Timeout before reverting to Forward or Reverse	Gselr Drive Reverse Gear Confirmation Timeout
2	GselrNeutParkGearCfmTiout	single	[1,1]	Min: 0, Max: 10	sec	Gear Command Confirmation Timeout before reverting to Neutral or Park	Gselr Neutral Park Gear Confirmation Timeout
3	GselrVehGearReqCfg	boolean	[4,4]	Min: , Max:		Automatic Vehicle Gear Request Configuration Table ROWS “ParkReq; NeutReq; DrvReq; RvsReq” COLUMNS “VehNotRdyReq; VehSleepReq; ChrgPlugReq; DrvrPresReq”	Gselr Vehicle Gear Request Configuration
4	GselrGearIninWaitCfg	boolean	[4,6]	Min: , Max:		Gear Selector Initialization Wait Conditions Configuration Table ROWS “ParkInin; NeutInin; DrvInin; RvsInin” COLUMNS “GearFbInin; VehDirFwrd; VehDirRvs; EpbUknwnLoSpd; EpbUknwnHiSpd; EpbParkHiSpd”	Gselr Gear Initialization Wait Configuration
5	GselrGearFbIniTiout	single	[1,1]	Min: 0, Max: 5	sec	Gear Feedback Initialization Timeout	Gselr Gear Feedback Initial Timeout
6	GselrGearActSwtCt	uint8	[1,1]	Min: 3, Max: 200		Maximum number of switching of Gear Selector state signal during the check period	Gselr Gear Actual Switch Count
7	GselrGearActSwtTi	single	[1,1]	Min: 0.03, Max: 100	sec	Time period for Gear Selector state signal switching check	Gselr Gear Actual Switch Time
8	GselrVehSpdLockThd	single	[1,1]	Min: , Max:	km/h	Vehicle Speed Gear Interlock Threshold (Vehicle Speed Lock)	Gselr Vehicle Speed Lock Threshold
9	GselrGearIntlockCfg	boolean	[4,10]	Min: , Max:		Gear Interlock Configuration Table for Normal Operation ROWS “ParkIntlock; NeutIntlock; DrvIntlock; RvsIntlock” COLUMNS “VehSpdLock; VehSpdFwrdDirLock; VehSpdRvsDirLock; BrkPedlLock; BrkPedlLoSpdLock; BrkPedlParkLock; VehNotRdyLock; VehSleepLock; ChrgPlugLock; DrvrPresLock”	Gselr Gear Interlock Configuration