Compensation of influence of transverse acceleration on braking shift-down points
AssigneeDr. Ing. h.c. F. Porsche Aktiengesellschaft
InventorsJan-Peter Hoffmeister, Torsten Mueller
Life of this patent
Estimating the term…
Abstract
A method for controlling an automatic transmission of a vehicle includes detecting a deceleration of the vehicle; detecting a cornering value of the vehicle; determining, as a function of the deceleration and as a function of the cornering value, a compensated shift-down point of a rotational speed at which shifting into a relatively low gear of the transmission occurs; and selecting a gear as a function of the compensated shift-down point.
Claims12
A method for controlling an automatic transmission of a vehicle, the method comprising:
- detecting a deceleration of the vehicle;
- detecting a cornering value of the vehicle;
- determining, as a function of the deceleration and as a function of the cornering value, a compensated shift-down point, the compensated shift-down point being a rotational speed at which downshifting of the transmission occurs;
- and
- selecting a gear as a function of the compensated shift-down point,
- wherein a total force is determined from the deceleration and the cornering value, and
- wherein the compensated shift-down point is raised for an increasing total force.
A control unit for an automatic transmission comprising:
- a first detector configured to detect a deceleration of a vehicle;
- a second detector configured to detect a cornering value of the vehicle;
- a computer configured to:
- determine a total force from the deceleration and the cornering value,
- determine, as a function of the deceleration and as a function of the cornering value, a compensated shift-down point, the compensated shift-down point being a rotational speed at which downshifting of the transmission occurs, wherein the compensated shift-down point is raised for an increasing total force, and
- select a gear as a function of the compensated shift-down point;
- and
- an output unit designed to transfer the gear to a transmission.
A method for controlling an automatic transmission of a vehicle, the method comprising:
- detecting a deceleration of the vehicle;
- detecting a cornering value of the vehicle;
- determining, as a function of the deceleration and as a function of the cornering value, a compensated shift-down point, the compensated shift-down point being a rotational speed at which downshifting of the transmission occurs;
- and
- selecting a gear as a function of the compensated shift-down point,
- wherein a compensation factor is determined from a characteristic curve that is a function of a transverse acceleration, and wherein the shift-down point is determined by using the compensation factor.
Dependencies are inferred from the claim text.