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公开(公告)号：JPH0586921A
公开(公告)日：1993-04-06
申请号：JP25231391
申请日：1991-09-30
Applicant: TOYOTA MOTOR CORP , NIPPON DENSO CO
Inventor： SAKAMOTO JUNICHI , SAWADA MAMORU
Abstract: PURPOSE:To prevent malfunctional acceleration at the time of running in a high-speed gear position by providing a gear position detection means for detecting the gear position of a transmission, and a changing means for changing a threshold to a larger degree as a gear ratio of the detected gear position is smaller. CONSTITUTION:A threshold of throttle opening according to the slipperiness of a road surface is calculated by a threshold calculation means M5. Acceleration slip is estimated by an acceleration slip estimation means M8 when acceleration slip does not occur, and when a present throttle opening exceeds the threshold. The opening of a throttle valve is closed to a threshold value by a stand-by control means M9 when acceleration slip is estimated. A gear position of a transmission is detected by a gear position detection means M6, and a threshold is changed into a larger level as a gear ratio of the detected gear position is smaller, by a changing means M7. Timing for closing a throttle valve by the estimation of acceleration slip is thus appropriate, and malfunction acceleration in a high gear stage is thus prevented.
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公开(公告)号：JP2001169405A
公开(公告)日：2001-06-22
申请号：JP34984999
申请日：1999-12-09
Applicant: TOYOTA MOTOR CORP
Inventor： SHIMADA MICHIHITO , NIWA SATORU , SAKAMOTO JUNICHI
IPC: B60T8/26 , B60L7/24 , B60L7/26 , B60T8/00 , B60T8/1766
Abstract: PROBLEM TO BE SOLVED: To optimize regeneration efficiency without deteriorating the braking performance and the stability of a vehicle. SOLUTION: When a required braking torque Tbd is not larger than the maximum regenerative braking torque Trefmax of front wbeels (S40), a regenerative braking torque Tref of the front wheels is set to the required braking torque Tbd, and the frictional braking torque Tmf of the front wheels and the frictional braking torque Tmr of the rear wheels are set to zero respectively (S50). When Tbd is larger than Trefmax, the regenerative braking torque Tref of the front wheels is set to the maximum regenerative braking torque Trefmax of the front wheels (S60). If the required braking torque Tbd is larger than the sum of maximum regenerative braking torques generatable by regenerative brakes for front and rear wheels by a braking force distribution ratio for the front and rear wheels which are set beforehand (S70), friction brakes are operated in addition to the regenerative brakes for the front and rear wheels (S110-S150).
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公开(公告)号：JPH11115746A
公开(公告)日：1999-04-27
申请号：JP27897297
申请日：1997-10-13
Applicant: TOYOTA MOTOR CORP
Inventor： SAKAMOTO JUNICHI , TANAKA HIROKI , FUKAZAWA TSUKASA , SAKAI AKIRA
Abstract: PROBLEM TO BE SOLVED: To favorably control total braking torque including at least either of regenerative braking torque and frictional braking torque by enabling the same control as that before being made into zero to be continued, even after real regenerative braking torque is made into zero. SOLUTION: It is judged whether regenerative braking cooperative control completion condition is satisfied or not (S1). When the condition is satisfied, the control is continued, and it is judged whether vehicle speed is lower than the set speed or not (S2). When vehicle speed is higher than the set speed, thereafter steps are carried out as it is (S3-S8). Even if real regenerative braking torque supplied from a motor-driven control device is zero, the same steps are continued to be carried out (S1-S8). Further when the vehicle speed becomes lower than the set speed, target regenerative braking torque is made zero (S9), and even when the target regenerative braking torque is made zero, master cylinder liquid pressure is read (S10), and the target braking torque is obtained. Hereby change of the total braking torque can be restrained, and change of deceleration can be restrained.
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公开(公告)号：JPH11115745A
公开(公告)日：1999-04-27
申请号：JP27923797
申请日：1997-10-13
Applicant: TOYOTA MOTOR CORP
Inventor： ASADA HIROKI , SAKAI AKIRA , FUKAZAWA TSUKASA , SAKAMOTO JUNICHI
Abstract: PROBLEM TO BE SOLVED: To provide a regenerative brake system which can avoid deterioration of brake feeling in the state that oscillation of fluid pressure is generated. SOLUTION: A regenerative ECU 17 performs determination whether the car is running in a good state or bad state based on sensed outputs of wheel acceleration sensors 33, 34, 35, 36. Under the good state running, hydraulic braking is controlled cooperatively with regenerative braking due to a motor 11. Under the bad state running, a motor ECU 15 and the regenerative ECU 17 gradually control the regenerative braking, finally prohibit it, and allow the hydraulic braking alone.
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公开(公告)号：JPH11115742A
公开(公告)日：1999-04-27
申请号：JP27906697
申请日：1997-10-13
Applicant: TOYOTA MOTOR CORP
Inventor： SAKAMOTO JUNICHI , FUKAZAWA TSUKASA , SAKAI AKIRA
Abstract: PROBLEM TO BE SOLVED: To prevent generation of regenerative braking force from the vibration of a brake pedal in a braking force control device which has a hydraulic braking means and a regenerative braking means. SOLUTION: A hydraulic control device generates hydraulic braking force FL, while a driving regenerative device 14 generates regenerative braking force FG. When brake operation is sensed, the hydraulic braking force FL and the regenerative braking force FG are so controlled that the sum thereof are agreed with required braking force FREG. A brake ECU 39 determines whether the vehicle runs in a bad state or not based on a variation ratio of acceleration of wheels, etc. When the bad state running is determined, brake operation is sensed from the vibration of a brake pedal 36. After such a determination, generation of the regenerative braking force FG is prohibited.
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Patent Agency Ranking
公开(公告)号：JPH1178839A
公开(公告)日：1999-03-23
申请号：JP25054697
申请日：1997-09-16
Applicant: TOYOTA MOTOR CORP , AISIN SEIKI
Inventor： FUKAZAWA TSUKASA , SAKAI AKIRA , ASADA HIROKI , SAKAMOTO JUNICHI , URABABA SHINGO , SUZUKI YOSHINORI , SAKAI TOSHIYUKI , ENOMOTO NAOYASU
Abstract: PROBLEM TO BE SOLVED: To inhibit a deficit in total braking torque of the driving wheel in antilock control under the condition that regenerative braking torque is zero, in a brake device for vehicle including a regenerative brake device and a friction brake device. SOLUTION: This device is constituted so that regenerative braking torque of a front wheel is set to zero (S9) when antilock control start condition is filled in the time of shift to the front wheel, and hydraulic braking torque is controlled so as to be larger (S12,19), as a tendency, than that in the time of regular antilock control. Consequently, a deficit in total braking torque of the driving wheel can be inhibited even though the regenerative braking torque is lessened to zero. The total braking torque can be properly controlled so that a braking slip condition of the driving wheel can be kept in nearly proper condition, if the friction braking torque is controlled large, because the regenerative braking torque is zero.
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公开(公告)号：JPH09158752A
公开(公告)日：1997-06-17
申请号：JP31912095
申请日：1995-12-07
Applicant: TOYOTA MOTOR CORP
Inventor： SAKAMOTO JUNICHI
Abstract: PROBLEM TO BE SOLVED: To improve startability by vibrating the control quantity of engine output at the time of detecting an acceleration slip, and changing vibration time according to a slip state in a device for controlling engine output at the time of detecting the acceleration slip. SOLUTION: In a device for driving a sub-throttle valve 42 to open/close under the control of an ECU 46 to perform acceleration slip control, body acceleration at the time of starting control is computed to estimate the road surface μ, and at the time of judging a very low μ road, normal acceleration slip control is switched to very low μ road control. In the very low μ road control, the increase correction quantity and the decrease correction quanatity are added to the target throttle opening to open/close the throttle valve 42 in a specified cycle, thus vibrating engine output. This engine output vibration is controlled according to a slip state by operating the speed threshold, hysteresis and increase-decrease correction quantity value, reflecting the target opening, computed in acceleration slip control, to a certain extent.
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公开(公告)号：JPH0367762A
公开(公告)日：1991-03-22
申请号：JP20365389
申请日：1989-08-04
Applicant: TOYOTA MOTOR CORP
Inventor： SAKAMOTO JUNICHI
IPC: B60T8/175 , B60T8/172 , B60T8/1763 , B60T8/58
Abstract: PURPOSE:To correctly determine whether the start of a vehicle is easy or difficult by determining that the start of the vehicle is difficult if the speed of the vehicle body is less than a predetermined threshold at the start of a pressure increasing mode of a wheel cylinder for actuating the brake of a driving wheel. CONSTITUTION:A fluid pressure control device A controls the fluid pressure of a wheel cylinder for actuating the brake of a driving wheel, after patterns which are different according to whether the start of a vehicle is easy or difficult. In the above constitution, the speed of the vehicle body is detected by means B. The starting period of a pressure increasing mode to be carried out after the tendency of slip to decrease first appears in a driving wheel is detected by means C. The speed of the vehicle body is compared to a predetermined threshold at the start of the pressure increasing mode and, when the speed of the vehicle body is less than the threshold, such diagnosis is made by means D that the start of the vehicle is difficult. Thus the period at which the speed of the vehicle body is detected is properly selected so as to correctly determine whether the start of the vehicle is easy or difficult.
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公开(公告)号：JP2002347596A
公开(公告)日：2002-12-04
申请号：JP2001161834
申请日：2001-05-30
Applicant: TOYOTA MOTOR CORP
Inventor： SAKAMOTO JUNICHI
IPC: B60T8/36 , B60T8/1761
Abstract: PROBLEM TO BE SOLVED: To control a wheel cylinder pressure exactly by means of a linear valve in spite of characteristic deviation of a linear valve. SOLUTION: A desired wheel cylinder pressure Pti of each wheel is calculated according to a brake operating quantity of a driver (S200), a desired wheel cylinder pressure Pti for reducing a skid is calculated, when an anti-skid control is necessary (S30 to 80), a desired drive current It for the linear valve is calculated based on the deviation from the desired wheel cylinder pressure Pti and the actual wheel cylinder pressure Pi (S100), the ratio Ro of the desired drive current It to the actual drive current Im is calculated for N cycles, these mean values are calculated as a correction factor Rr for compensating the characteristic deviation, and the linear valve is controlled, based on the desired drive current Ita after the correction (S130, 160).
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公开(公告)号：JP2001177916A
公开(公告)日：2001-06-29
申请号：JP35238199
申请日：1999-12-10
Applicant: TOYOTA MOTOR CORP , TOYOTA CENTRAL RES & DEV
Inventor： OBUCHI HIROSHI , SOGA MASAYUKI , NIWA SATORU , SAKAMOTO JUNICHI , HATTORI YOSHIKAZU
Abstract: PROBLEM TO BE SOLVED: To provide an energy-supplying apparatus which conducts smooth supplying of energy to a running mobile. SOLUTION: This energy-supplying apparatus supplies energy to a running mobile 1 from an energy-supplying facility 2 and is provided with a transmitting means 6 for transmitting to the mobile 1, information about the situation on the supplying point in the side of the supplying facility 2.
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