Determination of slip target for a vehicle engine speed controller
AssigneeVolvo Truck Corporation
InventorsRamadan Salif, Teodoro Bora
Life of this patent
Estimating the term…
Abstract
Techniques for determining a modified slip target for a vehicle engine speed controller are disclosed. A method comprises comparing a difference between a maximum wheel speed and a minimum wheel speed for wheels of open differential and driven axles controlled by the vehicle engine speed controller to a preconfigured wheel speed offset. The method comprises setting, at least when the difference exceeds the preconfigured wheel speed offset, the modified slip target to be lower than a requested slip target for the vehicle engine speed controller.
Claims17
A method for determining a modified slip target μtrgt for a vehicle engine speed controller, the method comprising:
- comparing a difference between a maximum wheel speed ωmax and a minimum wheel speed ωmin for wheels of open differential and driven axles controlled by the vehicle engine speed controller to a preconfigured wheel speed offset ΔS;
- and
- setting, at least when the difference ωmax−ωmin exceeds the preconfigured wheel speed offset ΔS, the modified slip target μtrgt to be lower than a requested slip target μreq for the vehicle engine speed controller, wherein the modified slip target is determined as:
- μ
- trgt
- =
- μ
- req
- /
- K
- Where K≥1 is a reduction factor, and wherein the reduction factor K is a function of the difference ωmax−ωmin and the preconfigured wheel speed offset ΔS.
A system for determining a modified slip target μtrgt for a vehicle engine speed controller, the system comprising processing circuitry, the processing circuitry being configured to cause the system to:
- compare a difference between a maximum wheel speed ωmax and a minimum wheel speed ωmin for wheels of open differential and driven axles controlled by the vehicle engine speed controller to a preconfigured wheel speed offset ΔS;
- and
- set, at least when the difference ωmax−ωmin exceeds the preconfigured wheel speed offset ΔS, the modified slip target μtrgt to be lower than a requested slip target μreq for the vehicle engine speed controller, wherein the modified slip target is determined as:
- μ
- trgt
- =
- μ
- req
- /
- K
- where K≥1 is a reduction factor, and wherein the reduction factor K is a function of the difference ωmax−ωmin and the preconfigured wheel speed offset ΔS.
A non-transitory computer-readable storage medium for determining a modified slip target μtrgt for a vehicle engine speed controller, the non-transitory computer-readable storage medium comprising program code which, when run on processing circuitry of a system, causes the processing circuitry to:
- compare a difference between a maximum wheel speed ωmax and a minimum wheel speed ωmin for wheels of open differential and driven axles controlled by the vehicle engine speed controller to a preconfigured wheel speed offset ΔS;
- and
- set, at least when the difference ωmax−ωmin exceeds the preconfigured wheel speed offset ΔS, the modified slip target μtrgt to be lower than a requested slip target μreq for the vehicle engine speed controller, wherein the modified slip target is determined as:
- μ
- trgt
- =
- μ
- req
- /
- K
- Where K≥1 is a reduction factor, and wherein the reduction factor K is a function of the difference ωmax−ωmin and the preconfigured wheel speed offset ΔS.
Dependencies are inferred from the claim text.