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US 11,203,341 B2Granted
Method to control a road vehicle for the execution of a standing start
AssigneeFerrari S.P.A.
InventorsAlessandro Barone, Andrea Nannini, Giacomo Senserini, Stefano Marconi
Life of this patent
Estimating the term…
Abstract
A method to control a road vehicle for the execution of a standing start; the control method comprises the steps of: engaging a gear in a transmission while a corresponding clutch is open; progressively closing the clutch causing the clutch to transmit a torque that causes the rotation of at least a pair of drive wheels; determining a target slip of the drive wheels; cyclically determining a real slip of the of the drive wheels; and continuously modulating the torque transmitted by the clutch during the closing of the clutch based of a difference between the target slip of the drive wheels and the real slip of the of the drive wheels.
Claims11
A method to control a road vehicle (1) for the execution of a first standing start;
- the control method comprises the steps of:
- engaging a gear in a transmission (7) of the road vehicle (1) while a corresponding clutch (16A) of the road vehicle (1) is open;
- progressively closing the clutch (16A) causing the clutch (16A) to transmit a torque that causes the rotation of at least a pair of drive wheels (3) of the road vehicle (1);
- determining a target slip (ST) of the drive wheels (3);
- cyclically determining a real slip of the (SR) of the drive wheels (3);
- and
- continuously modulating the torque transmitted by the clutch (16A) during the closing of the clutch (16A) based of a difference between the target slip (ST) of the drive wheels (3) and the real slip of the (SR) of the drive wheels (3);
- wherein the torque transmitted by the clutch (16A) during the closing of the clutch (16A) is modulated, so as to pursue the target slip (ST) of the drive wheels (3), by means of a feedback control in which a control error (εS) is the difference between the target slip (ST) of the drive wheels (3) and the real slip of the (SR) of the drive wheels (3);
- wherein the torque transmitted by the clutch (16A) during the closing of the clutch (16A) is modulated by a PID controller (27) which receives, as an input, the control error (εS);
- wherein a final value (TH) of an integral contribution of the PID controller (27) is stored at the end of the first standing start;
- and
- wherein the final value (TH) of the integral contribution of the PID controller (27) at the end of the first standing start is added to a control signal (TC) generated by the PID controller (27) during a second standing start subsequent to the first standing start.
9 more elements
A method to control a road vehicle (1) for the execution of a first standing start;
- the control method comprises the steps of:
- engaging a gear in a transmission (7) of the road vehicle (1) while a corresponding clutch (16A) of the road vehicle (1) is open;
- progressively closing the clutch (16A) causing the clutch (16A) to transmit a torque that causes the rotation of at least a pair of drive wheels (3) of the road vehicle (1);
- determining a target slip (ST) of the drive wheels (3);
- cyclically determining a real slip of the (SR) of the drive wheels (3);
- continuously modulating the torque transmitted by the clutch (16A) during the closing of the clutch (16A) based of a difference between the target slip (ST) of the drive wheels (3) and the real slip of the (SR) of the drive wheels (3);
- storing a mean value of the torque transmitted by the clutch (16A) during the closing of the clutch (16A) over the course of the first standing start;
- and
- assuming, in a second standing start subsequent to the first standing start, that an initial value of the torque is equal to the mean value of the torque transmitted by the clutch (16A) during the closing of the clutch (16A) over the course of the first standing start;
- wherein the torque transmitted by the clutch (16A) during the closing of the clutch (16A) is modulated so as to pursue the target slip (ST) of the drive wheels (3).
7 more elements
A method to control a road vehicle (1) for the execution of a first standing start;
- the control method comprises the steps of:
- engaging a gear in a transmission (7) of the road vehicle (1) while a corresponding clutch (16A) of the road vehicle (1) is open;
- progressively closing the clutch (16A) causing the clutch (16A) to transmit a torque that causes the rotation of at least a pair of drive wheels (3) of the road vehicle (1);
- determining a target slip (ST) of the drive wheels (3);
- cyclically determining a real slip of the (SR) of the drive wheels (3);
- continuously modulating the torque transmitted by the clutch (16A) during the closing of the clutch (16A) based of a difference between the target slip (ST) of the drive wheels (3) and the real slip of the (SR) of the drive wheels (3);
- determining a degree of grip of a road surface on which the road vehicle (1) rests;
- storing an initial value of the torque transmitted by the clutch (16A) during the closing of the clutch (16A) based on the degree of grip of the road surface;
- and
- cyclically determining the target slip (ST) of the drive wheels (3) based on the degree of grip of the road surface,
- wherein the torque transmitted by the clutch (16A) during the closing of the clutch (16A) is modulated so as to pursue the target slip (ST) of the drive wheels (3).
8 more elements
Dependencies are inferred from the claim text.