Anti-Drift (Efu) - Danfoss PVED-CLS User Manual

ENGINEERING TOMORROW
STW 3 - No of turns @
P3542 U16
Point C
STW 3 - Vehicle speed
P3544 U8
@ Point B
STW 3 - Vehicle speed
P3545 U8
@ Point C
STW 4 - No of turns @
P3546 U16
Point A
STW 4 - No of turns @
P3548 U16
Point B
STW 4 - No of turns @
P3550 U16
Point C
STW 4 - Vehicle speed
P3552 U8
@ Point B
STW 4 - Vehicle speed
P3553 U8
@ Point C
STW 5 - No of turns @
P3554 U16
Point A
STW 5 - No of turns @
P3556 U16
Point B
STW 5 - No of turns @
P3558 U16
Point C
STW 5 - Vehicle speed
P3560 U8
@ Point B
STW 5 - Vehicle speed
P3561 U8
@ Point C
Native wheel angle
range for steering wheel P3585 U8
programs
10.5

ANTI-DRIFT (EFU)

The anti-drift function is implemented to eliminate drift in the steering wheel due to internal leakage and for having
steering wheel in the same position, when driving straight ahead. The ideal output flow is calculated considering no drift
in the steering wheel, however, if there is a drift in the steering wheel the function's control algorithm will calculate an
anti-drift correction volume and determines the output flow (in ccm per revolution) by adding an anti-drift correction
volume to the ideal output flow.
The anti-drift correction volume is calculated by looking at the difference, in degrees, measured at the steering wheel and
the actual position of the wheels. How large a percentage of the full flow, the PVED-CLS's anti-drift algorithm will add,
is defined by the following four points, Point A to Point D, where Point B and Point C are configurable.
•
Point A (0, 0)
•
Point B (P3568, P3569)
•
Point C (160, P3569)
•
Point D (0, 0)
© Danfoss | August 2018
Program3 - Number of steering wheel turns lock to lock at the vehicle
- speed of "STW 3 - Vehicle speed @ Point C"
Resolution = 0.01; 1turn = 100
Program3 - Vehicle speed at which lock to lock steering wheel turns =
km/h
"STW 3 - No of turns @ Point B"
Program3: Vehicle speed at which lock to lock steering wheel turns =
km/h
"STW 3 - No of turns @ Point C"
Program4 - Number of steering wheel turns lock to lock at the vehicle
- speed of 0 km/h
Resolution = 0.01; 1turn = 100
Program4 - Number of steering wheel turns lock to lock at the vehicle
- speed of "STW 4 - Vehicle speed @ Point B"
Resolution = 0.01; 1turn = 100
Program4 - Number of steering wheel turns lock to lock at the vehicle
- speed of "STW 4 - Vehicle speed @ Point C"
Resolution = 0.01; 1turn = 100
Program4 - Vehicle speed at which lock to lock steering wheel turns =
km/h
"STW 4 - No of turns @ Point B"
Program4: Vehicle speed at which lock to lock steering wheel turns =
km/h
"STW 4 - No of turns @ Point C"
Program5 - Number of steering wheel turns lock to lock at the vehicle
- speed of 0 km/h
Resolution = 0.01; 1turn = 100
Program5 - Number of steering wheel turns lock to lock at the vehicle
- speed of "STW 5 - Vehicle speed @ Point B"
Resolution = 0.01; 1turn = 100
Program5 - Number of steering wheel turns lock to lock at the vehicle
- speed of "STW 5 - Vehicle speed @ Point C"
Resolution = 0.01; 1turn = 100
Program5 - Vehicle speed at which lock to lock steering wheel turns =
km/h
"STW 5 - No of turns @ Point B"
Program5: Vehicle speed at which lock to lock steering wheel turns =
km/h
"STW 5 - No of turns @ Point C"
Lock to lock wheel angle range
deg Used internally to maintain the steering sensitivity/aggressiveness when
physical max wheel angle endpoints are changed
Table 37
OEM 10 800
OEM 1 100
OEM 1 100
OEM 10 800
OEM 10 800
OEM 10 800
OEM 1 100
OEM 1 100
OEM 10 800
OEM 10 800
OEM 10 800
OEM 1 100
OEM 1 100
OEM 0 255
AQ00000211 | 87
800
5
10
800
800
800
5
10
800
800
800
5
10
255 S