Brake control method and brake control device for two-wheeled motor vehicle
First Claim
1. A brake control method for a two-wheeled motor vehicle, comprising the steps of:
- detecting a front wheel cylinder pressure;
detecting an amount of change in the front wheel cylinder pressure;
determining whether or not the front wheel cylinder pressure and the amount of change in the front wheel cylinder pressure that have been detected correspond to a brake condition where lifting of a rear wheel can occur; and
limiting increase of the front wheel cylinder pressure when it has been determined that the front wheel cylinder pressure and the amount of change in the front wheel cylinder pressure that have been detected correspond to the brake condition,wherein in said determining, when the state determined by the front wheel cylinder pressure and the amount of change in the front wheel cylinder pressure that have been detected is in a region that exceeds a boundary demarcated by a predetermined function of the amount of change in the front wheel cylinder pressure that relates to the front wheel cylinder pressure, it is judged that the state corresponds to the brake condition, the functions including at least one negative gradient section where the amount of change in the wheel cylinder pressure decreases with respect to an increase in the front wheel cylinder pressure.
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Accused Products
Abstract
To further improve, in a brake control method and device for a two-wheeled motor vehicle that utilizes a wheel cylinder pressure as a parameter for predicting the potential for lifting of a rear wheel, the accuracy of predicting lifting of the rear wheel.
A brake control method of the present invention comprises the steps of inputting a signal of an input sensor (step 100); detecting a front wheel cylinder pressure (step 102); detecting an amount of change in the front wheel cylinder pressure (step 104); determining whether or not the front wheel cylinder pressure and the amount of change in the front wheel cylinder pressure that have been detected correspond to a brake condition where lifting of a rear wheel can occur (step 106); and, when it is determined that the front wheel cylinder pressure and the amount of change in the front wheel cylinder pressure that have been detected correspond to the brake condition, reducing a pressure amplification gradient of the front wheel cylinder pressure.
9 Citations
12 Claims
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1. A brake control method for a two-wheeled motor vehicle, comprising the steps of:
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detecting a front wheel cylinder pressure; detecting an amount of change in the front wheel cylinder pressure; determining whether or not the front wheel cylinder pressure and the amount of change in the front wheel cylinder pressure that have been detected correspond to a brake condition where lifting of a rear wheel can occur; and limiting increase of the front wheel cylinder pressure when it has been determined that the front wheel cylinder pressure and the amount of change in the front wheel cylinder pressure that have been detected correspond to the brake condition, wherein in said determining, when the state determined by the front wheel cylinder pressure and the amount of change in the front wheel cylinder pressure that have been detected is in a region that exceeds a boundary demarcated by a predetermined function of the amount of change in the front wheel cylinder pressure that relates to the front wheel cylinder pressure, it is judged that the state corresponds to the brake condition, the functions including at least one negative gradient section where the amount of change in the wheel cylinder pressure decreases with respect to an increase in the front wheel cylinder pressure. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A brake control device comprising:
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pressure detecting means for detecting a front wheel cylinder pressure; pressure change amount detecting means for detecting an amount of change in the front wheel cylinder pressure; determining means for determining whether or is not the front wheel cylinder pressure and the amount of change in the front wheel cylinder pressure that have been detected correspond to a brake condition where lifting of a rear wheel can occur; brake control means for limiting increase of the front wheel cylinder pressure when it is determined that the front wheel cylinder pressure and the amount of change in the front wheel cylinder pressure that have been detected correspond to the brake condition, and storage means for storing a function of the amount of change in the front wheel cylinder pressure that relates to the front wheel cylinder pressure in order to determine the brake condition, wherein the determining means determines that, when the state determined by the detected front wheel cylinder pressure and amount of change in the front wheel cylinder pressure is in a region that exceeds a boundary demarcated by the function, the state corresponds to the brake condition, the function including at least one negative gradient section where the amount of change in the wheel cylinder pressure decreases with respect to an increase in the front wheel cylinder pressure. - View Dependent Claims (8, 9, 10, 11, 12)
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Specification