Toyota, Japan
Toyota, Japan

Time filter

Source Type

Patent
Toyota Jidosha Kabushiki Kaisha and Advics Co. | Date: 2017-01-11

An air detector detects the presence or absence of air in a hydraulic braking system including a rearward-hydraulic-pressure controller 28 connected to a rearward chamber 66 located behind a pressurizing piston 34 in a master cylinder 26. When an instruction for detecting the presence or absence of air is output, a hydraulic pressure is accumulated in an accumulator 108 at S1. Pressure holding valves 170 are closed at S2. The presence or absence of air in an upstream portion 180 including the rearward-hydraulic-pressure controller 28 is detected at S3 based on a relationship between a servo pressure and a time of controlling an input chamber 122. The pressure holding valves 170 are opened at S6. The presence or absence of air of a downstream portion 182 including a pressure chamber 42 is detected at S7 based on a relationship between a stroke of a brake pedal 24 and the servo pressure. With these processings, the presence or absence of air is detected for the upstream portion and the downstream portion, separately. Thus, when air is detected, it is possible to identify a portion at which the air exists.


Patent
Toyota Jidosha Kabushiki Kaisha and Advics Co. | Date: 2016-05-25

The present invention reduces lowering in control accuracy for a hydraulic pressure in a brake cylinder, which lowering is caused by vibrations of a hydraulic pressure in an upstream portion due to operations of a slip control device during anti-lock control. The vibrations of the hydraulic pressure in the upstream portion are transmitted to a control pressure chamber via a pressurizing piston of a master cylinder and a control piston of a regulator. During anti-lock control, in contrast, a pressure-increase linear valve and a pressure-reduction linear valve are opened, allowing change in volume of the control pressure chamber, resulting in reduction in stiffness. This reduction suppresses vibrations of a hydraulic pressure in the control pressure chamber, resulting in suppression of vibrations of a hydraulic pressure in a front pressure chamber. As a result, it is possible to reduce the lowering in control accuracy for the hydraulic pressure in the brake cylinder in anti-lock control using the hydraulic pressure in the front pressure chamber, which can well avoid a long braking distance.


Patent
Toyota Jidosha Kabushiki Kaisha and Advics Co. | Date: 2016-06-29

A vehicle braking control apparatus includes an obstacle detection unit to detect an obstacle ahead of a vehicle, and a distance and a relative speed of the obstacle; a time to collision calculation unit to calculate time to collision with the obstacle; an estimated distance calculation unit to calculate an estimated distance to the obstacle when the obstacle has gone out of detection; and a braking control unit to generate a braking force automatically when the time to collision is a predetermined time or less, and when the obstacle has gone out of detection while the braking force is generated, to release the braking force when the estimated distance is a predetermined threshold (<0) or less, wherein the obstacle is classified into a type depending on precision of the distance and relative speed, to set the predetermined threshold less while the precision is worse.


Patent
Advics Co. | Date: 2016-10-12

The present invention is provided with a power transmission member (INP) rotatably supported by a caliper (CRP), and a ratchet wheel (RCH) fixed by said member (INP). A first linear direction movement of a pawl member (TSU) that engages with a mobile member (PBR) of a solenoid (SOL) is guided by a guide member (GID) fixed by the caliper (CRP). The pawl member (TSU) is continuously pressed in a release direction (Dtr) by an elastic member (SPR). The interlocking force in an interlocking direction (Dts), imparted by mobile member (PBR) of the solenoid (SOL) mobile member (PBR) to the pawl member (TSU), and the release force in the release direction (Dtr), which is imparted by the elastic member (SPR) to the pawl member (TSU) oppose each other, and the interlocking force is larger than the release force. The pawl member (TSU) and the mobile member (PBR) move linearly together in one of the interlocking direction (Dts) and the release direction (Dtr).


Patent
Advics Co. and Toyota Jidosha Kabushiki Kaisha | Date: 2016-01-27

The brake controller includes a friction brake device (B), a regeneration brake device (A), a required braking force calculating portion (27), a vehicle motion control portion (30) which distributes the required braking force (Fd) to the non-regeneration braking side right/left wheels that is either one of the right/left front wheels (Wfr, Wfl) and right/left rear wheels (Wrr, Wrl), a maximum braking force calculating portion (29) which calculates the maximum braking force at each wheel (Wfr, Wfl, Wrr, Wrl) and a braking force control portion (31) which calculates the regeneration braking force generated at the regeneration braking side right/left wheels within a range where the regeneration braking force (Fc) to be generated at the regeneration braking side right wheel and the regeneration braking force to be generated at the regeneration braking side left wheel do not exceed a smaller value of the maximum braking forces (Fmax) of the regeneration braking side right/left wheels, based on the required braking force andthe distribution of the braking force to the non-regeneration braking side right/left wheels.


Patent
Toyota Jidosha Kabushiki Kaisha and Advics Co. | Date: 2016-01-14

A vehicle braking control apparatus includes an obstacle detection unit configured to detect an obstacle ahead of a vehicle, and to detect a distance to the obstacle from the vehicle, and a relative speed of the obstacle with respect to the vehicle; an electronic control unit configured to generate a braking force of the vehicle automatically based on the distance and the relative speed, and to weaken the braking force when a value subtracting a deceleration amount of a vehicle speed of the vehicle since a start of generating the braking force, from a predetermined upper-limit deceleration amount is less than or equal to a predetermined threshold. The upper-limit deceleration amount is set to increase while an elapsed time increases since the start of generating the braking force, at least after a predetermined first time has passed since the start of generating the braking force.


Patent
Aisin Seiki and Advics Co. | Date: 2016-01-06

A control signal output unit (a drive control unit) (11i) executes control to retain a gear position corresponding to a motor generator (3) during deceleration of a vehicle and regeneration executed by the motor generator (3).


Patent
Toyota Jidosha Kabushiki Kaisha and Advics Co. | Date: 2016-06-20

A hydraulic braking system includes: a master cylinder including a pressurizing piston, a rearward chamber, and a pressure chamber; and a rearward-hydraulic-pressure controller connected to the rearward chamber and including a pressure increase valve and a regulator for controlling a hydraulic pressure in an output chamber. An air detector includes: an upstream detector, including the rearward-hydraulic-pressure controller, for detecting presence or absence of air in an upstream portion based on a relationship between the hydraulic pressure in the output chamber and an open time of the pressure increase valve; and a downstream detector for detecting presence or absence of air in a downstream portion based on a relationship between a stroke of the pressurizing piston and the hydraulic pressure in the output chamber. The downstream portion includes a portion located downstream of the pressure chamber of the master cylinder.


Patent
Denso Corporation and Advics Co. | Date: 2016-07-21

A vehicle-use brake apparatus has a control unit which includes a correcting pressure acquisition section that acquires a flow rate correcting pressure corresponding to a discharge amount of brake fluid discharged by a pump, a command differential pressure acquisition section that acquires a command differential pressure by performing a flow rate correction where the flow rate correcting pressure is subtracted from a target wheel cylinder pressure, and a correction restriction section that performs a correction restriction by which the flow rate correcting pressure is reduced or the flow rate correction is not performed if an actual wheel cylinder pressure is smaller than a target wheel cylinder pressure.


Patent
Advics Co. | Date: 2016-06-29

This electric braking device uses drive torque of an electric motor (MTR) to push a friction member against a rotating member secured to a vehicle wheel and produce braking torque in the vehicle wheel. This device comprises a body power source (BBD) for electric motor power supply secured to a body of the vehicle, and a vehicle wheel power source (BWH) for electric motor power supply secured to the vehicle wheel. The body power source (BBD) supplies power to the vehicle wheel power source (BWH) via a first electric path (PBD+PWH), and the vehicle wheel power source (BWH) supplies power to the electric motor (MTR) via a second electric path (PWH). When braking torque is produced in the vehicle wheel, the electric motor (MTR) is normally driven using the vehicle wheel power source (BWH). An electric braking device is thereby provided in which a power line electrically connecting the body side and the vehicle wheel side bends readily.

Loading ADVICS Co collaborators
Loading ADVICS Co collaborators