BRAKE CONTROL METHOD AND SYSTEM
First Claim
1. A two-wheeled motor vehicle brake control method comprising:
- determining whether or not the value of a predetermined parameter that has been preselected as an index for predicting the potential for lifting of a rear wheel exceeds a first predetermined value;
determining that the potential for lifting of the rear wheel is large when the value of the predetermined parameter exceeds the first predetermined value and controlling generation of brake force; and
next determining whether or not the value of the predetermined parameter has fallen below a second predetermined value and, when it is determined that the predetermined parameter has fallen below the second predetermined value, releasing the control of the brake force.
1 Assignment
0 Petitions
Accused Products
Abstract
To predictively determine the occurrence of rear wheel lifting before actual lifting of a rear wheel occurs and enable control of brake force.
Vehicle body deceleration is computed on the basis of wheel velocities obtained by wheel velocity sensors 45 and 46 (S102), and when it is determined that that computed value exceeds a predetermined value K1 (S104), then the pressure of a front wheel cylinder 3 is reduced by a predetermined pressure and held at that reduced pressure (S106), and when it is determined that vehicle body deceleration has fallen below a value that is, for example, lower by a predetermined value α than the predetermined value K1 (S108), then the state of holding of the pressure of the front wheel cylinder 3 is released (S110) and brake control returns to normal brake control.
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Citations
22 Claims
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1. A two-wheeled motor vehicle brake control method comprising:
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determining whether or not the value of a predetermined parameter that has been preselected as an index for predicting the potential for lifting of a rear wheel exceeds a first predetermined value; determining that the potential for lifting of the rear wheel is large when the value of the predetermined parameter exceeds the first predetermined value and controlling generation of brake force; and next determining whether or not the value of the predetermined parameter has fallen below a second predetermined value and, when it is determined that the predetermined parameter has fallen below the second predetermined value, releasing the control of the brake force. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A two-wheeled motor vehicle brake control system configured to be capable of transmitting oil pressure arising in a front brake master cylinder in response to operation of a first brake operator to a front wheel cylinder via an oil pressure system, capable of transmitting oil pressure arising in a rear brake master cylinder in response to operation of a second brake operator to a rear wheel cylinder via an oil pressure system, and capable of discharging brake fluid of the front wheel cylinder to a front reservoir as desired,
wherein the brake control system is configured to determine whether or not the value of a predetermined parameter that has been preselected as an index for predicting the potential for lifting of a rear wheel exceeds a first predetermined value, determine that the potential for lifting of the rear wheel is large when the value of the predetermined parameter exceeds the first predetermined value and control generation of brake force by the front wheel cylinder, and next determine whether or not the value of the predetermined parameter has fallen below the second predetermined value and, when it is determined that the predetermined parameter has fallen below a second predetermined value, release the control of the brake force.
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17. A two-wheeled motor vehicle brake control program that is executed in a two-wheeled motor vehicle brake control system configured to be capable of transmitting oil pressure arising in a front brake master cylinder in response to operation of a first brake operator to a front wheel cylinder via an oil pressure system, capable of transmitting oil pressure arising in a rear brake master cylinder in response to operation of a second brake operator to a rear wheel cylinder via an oil pressure system, and capable of discharging brake fluid of the front wheel cylinder to a front reservoir as desired,
wherein the brake control program includes a first step of determining whether or not the value of a predetermined parameter that has been preselected as an index for predicting the potential for lifting of a rear wheel exceeds a first predetermined value, a second step of determining that the potential for lifting of the rear wheel is large when the value of the predetermined parameter exceeds the first predetermined value at the first step, causing brake fluid to be discharged to the front reservoir such that the pressure of the front wheel cylinder is reduced by a predetermined pressure and, when the pressure of the front wheel cylinder has been reduced by a predetermined pressure, causing the pressure of the front wheel cylinder to be held at that pressure, a third step of determining whether or not the value of the predetermined parameter has fallen below a value that is lower by a predetermined value than the first predetermined value, and a fourth step of releasing holding of the pressure of the front wheel cylinder when it is determined in the third step that the predetermined parameter has fallen below the value that is lower by a predetermined value than the first predetermined value.
Specification