| US 7,588,298 B2 | ||
| Brake system control apparatus | ||
| Hiroshi Nakaoka, Okazaki (Japan); Yoshito Tanaka, Nishikamo-gun (Japan); Masayasu Ohkubo, Okazaki (Japan); and Masaaki Komazawa, Nishkamo-gun (Japan) | ||
| Assigned to Toyota Jidosha Kabushiki Kaisha, Toyota (Japan) | ||
| Filed on Nov. 21, 2008, as Appl. No. 12/292,615. | ||
| Application 12/292615 is a division of application No. 11/251989, filed on Oct. 18, 2005, granted, now 7,513,578. | ||
| Claims priority of application No. 2004-307660 (JP), filed on Oct. 22, 2004. | ||
| Prior Publication US 2009/0096284 A1, Apr. 16, 2009 | ||
| Int. Cl. B60T 8/66 (2006.01) | ||
| U.S. Cl. 303—169 [303/159; 303/189] | 11 Claims |
| 1. A brake system control apparatus comprising:
plural brake systems, each brake system including at least one brake and a control actuator that can control braking torque
generated by the at least one brake, and
a braking torque control device that creates a control command value for the control actuator of each of the brake systems,
and that outputs the created control command value to the control actuator, wherein
the braking torque control device comprises:
a consideration command creating portion that creates a first control command value for the control actuator of a control-target
brake system, which is one of the plural brake systems, based on information concerning an operation of at least one brake
in the control-target brake system, and information concerning an operation of at least one brake in at least one of the other
brake systems;
a non-consideration command creating portion that creates a second control command value for the control actuator of the control-target
brake system based on the information concerning the control-target brake system, the second control command being not based
on the information concerning the at least one of the other brake systems; and
a control command value selecting portion that selects one of the first control command value created by the consideration
command creating portion and the second control command value created by the non-consideration command creating portion, based
on at least one of (a) an absolute value of a difference between a target value of braking torque in the control-target brake
system and a target value of braking torque in the at least one of the other brake systems; and (b) a combination of a control
mode in the control-target brake system, which is set to one of a pressure increasing mode, a pressure decreasing mode and
a pressure maintain mode, and a control mode in the at least one of the other brake systems, which is set to at least one
of a pressure increasing mode, a pressure decreasing mode and a pressure maintaining mode,
the selecting portion selects the first control command value created by the consideration command creating portion when the
control mode in the control-target brake system and the control mode in the at least one of the other brake systems are the
same, and both the control mode in the control-target brake system and the control mode in the at least one of the other brake
systems is the increasing mode in which the braking torque is increased or the decreasing mode in which the braking torque
is decreased; and
the selecting portion selects the second control command value created by the non-consideration command creating portion when
one of the control mode in the control-target brake system and the control mode in the at least one of the other brake systems
is the increasing mode in which the braking torque is increased, and the other of the control mode in the control-target brake
system and the control mode in the at least one of the other brake systems is the decreasing mode in which the braking torque
is decreased.
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