Method for controlling a processor of an electronic enclosure mounted on a wheel of a motor vehicle
First Claim
1. A method of controlling a processor (9) of an electronic enclosure (5) configured to be mounted on a wheel (2), fitted with a tire (4), of a motor vehicle (1), for calculating operating parameters of said wheel that include characteristic data of a contact patch of said tire with the ground, and for transmitting said characteristic data toward a central unit (12) integrated into said motor vehicle, said control method comprising:
- three operating modes comprised of;
a default standby mode (Mv), in which activities of the processor (9) relating to calculating and monitoring of the characteristic data of the contact patch are inactivated,a detection mode (Md) in which the processor (9) operates to detect a significant change in a value of a piece of the characteristic data of the contact patch, anda transmission mode (Mt) in which the processor (9) operates to calculate a sequence of values representative of the characteristic data of the contact patch, and to cause the values to be transmitted to the central unit (12), in order to enable the central unit to estimate a specific quantity related to the wheel (2);
and the following steps are executed, starting from a configuration of the processor operating in the default standby mode (Mv);
step 1;
switching from the default standby mode (Mv) to the detection mode (Md) on occurrence of at least one predetermined event that may be preceded by a significant variation of a value representative of the characteristic data of the contact patch;
step 2;
calculating, in the detection mode (Md), a calculated value representative of the characteristic data of the contact patch, and comparing said calculated value with a reference value (Vref);
step 3;
(a) switching to the transmission mode (Mt) if a difference between the calculated value and the reference value (Vref) exceeds a first predetermined threshold, and (b) switching to the standby mode (Mv) if the difference between the calculated value and the reference value (Vref) is below said first threshold;
step 4;
when switching to the transmission mode (Mt) in accordance with step 3(a), calculating and transmitting, in said transmission mode (Mt), the sequence of values representative of the characteristic data of the contact patch; and
step 5;
switching from the transmission mode (Mt) to the standby mode (Mv) after the transmitting of the sequence of values representative of the characteristic data of the contact patch.
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Accused Products
Abstract
In a method for controlling a processor on a wheel, wheel operation parameters are calculated and transmitted to a CPU. A first default operating mode (standby mode) is defined, during which activities related to calculating and checking the characteristic data of the tread mark of the tire are deactivated, a second operating mode for detection of significant changes in the value of a characteristic datum of the tread mark, sought during the appearance, in standby mode, of at least one event likely to be preceded by a significant change in the value, and a third operating mode for calculation and transmission, to a CPU, a sequence of values representing the characteristic datum of the footprint, sought during the confirmation, in detection mode, of a significant change in the value of the characteristic datum of the tread mark, and at the end of which a switch is made into monitoring mode.
52 Citations
20 Claims
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1. A method of controlling a processor (9) of an electronic enclosure (5) configured to be mounted on a wheel (2), fitted with a tire (4), of a motor vehicle (1), for calculating operating parameters of said wheel that include characteristic data of a contact patch of said tire with the ground, and for transmitting said characteristic data toward a central unit (12) integrated into said motor vehicle, said control method comprising:
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three operating modes comprised of; a default standby mode (Mv), in which activities of the processor (9) relating to calculating and monitoring of the characteristic data of the contact patch are inactivated, a detection mode (Md) in which the processor (9) operates to detect a significant change in a value of a piece of the characteristic data of the contact patch, and a transmission mode (Mt) in which the processor (9) operates to calculate a sequence of values representative of the characteristic data of the contact patch, and to cause the values to be transmitted to the central unit (12), in order to enable the central unit to estimate a specific quantity related to the wheel (2); and the following steps are executed, starting from a configuration of the processor operating in the default standby mode (Mv); step 1;
switching from the default standby mode (Mv) to the detection mode (Md) on occurrence of at least one predetermined event that may be preceded by a significant variation of a value representative of the characteristic data of the contact patch;step 2;
calculating, in the detection mode (Md), a calculated value representative of the characteristic data of the contact patch, and comparing said calculated value with a reference value (Vref);step 3;
(a) switching to the transmission mode (Mt) if a difference between the calculated value and the reference value (Vref) exceeds a first predetermined threshold, and (b) switching to the standby mode (Mv) if the difference between the calculated value and the reference value (Vref) is below said first threshold;step 4;
when switching to the transmission mode (Mt) in accordance with step 3(a), calculating and transmitting, in said transmission mode (Mt), the sequence of values representative of the characteristic data of the contact patch; andstep 5;
switching from the transmission mode (Mt) to the standby mode (Mv) after the transmitting of the sequence of values representative of the characteristic data of the contact patch. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification