Method and apparatus for alarming decrease in tire air-pressure and program for alarming decrease in tire air-pressure
First Claim
1. A method for alarming decrease in tire air-pressure in which decrease in tire air-pressure is determined on the basis of rotational velocity information of a wheel of a vehicle, wherein respective thresholds for determining whether judgment of decrease in tire air-pressure is to be made or not are changed depending on magnitude of driving torque of the vehicle when the vehicle is performing turning movements
1 Assignment
0 Petitions
Accused Products
Abstract
A method for alarming decrease in tire air-pressure in which decrease in tire air-pressure is determined on the basis of rotational velocity information of a wheel of a vehicle. Respective thresholds for determining whether judgment of decrease in tire air-pressure is to be made or not are changed depending on magnitude of driving torque of the vehicle when the vehicle is performing turning movements. It is possible to improve the detection accuracy without issuing an erroneous alarm even in the case where a large driving force is applied when the vehicle is, for instance, running on a climbing road or when it performs trailer towing.
3 Citations
5 Claims
-
1. A method for alarming decrease in tire air-pressure in which decrease in tire air-pressure is determined on the basis of rotational velocity information of a wheel of a vehicle,
wherein respective thresholds for determining whether judgment of decrease in tire air-pressure is to be made or not are changed depending on magnitude of driving torque of the vehicle when the vehicle is performing turning movements
-
2. An apparatus for alarming decrease in tire air-pressure in which decrease in tire air-pressure is determined on the basis of rotational velocity information of a wheel of a vehicle, comprising:
-
velocity detecting means which detect wheel speeds of the respective tires, a judging means which judges decrease in tire air-pressure on the basis of the wheel speeds detected by the velocity detecting means, and an alarming means which issues an alarm when a decrease in tire air-pressure is judged in the judging means, wherein the apparatus further comprises a threshold changing means which changes respective thresholds for determining whether judgment of decrease in tire air-pressure is to be made or not depending on magnitude of driving torque of the vehicle when the vehicle is performing turning movements. - View Dependent Claims (3, 4)
-
-
5. A program for alarming decrease in tire air-pressure wherein, for issuing an alarm of decrease in tire air-pressure of a vehicle, a computer is made to function as a judging means which judges decrease in tire air-pressure on the basis of wheel speeds detected by velocity detecting means, and a threshold changing means which changes respective thresholds for determining whether judgment of decrease in tire air-pressure is to be made or not depending on magnitude of driving torque of the vehicle when the vehicle is performing turning movements.
Specification