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31. 发明专利

JP2002356156A VEHICULAR BRAKING CONTROLLER 失效
公开(公告)号：JP2002356156A
公开(公告)日：2002-12-10
申请号：JP2001163525
申请日：2001-05-30
申请人： TOYOTA MOTOR CORP , DENSO CORP
发明人： HARA MASAHIRO , NIHEI TOSHIHISA , MATSUI NARIYUKI , MATSUURA MASAHIRO
IPC分类号： B60T8/58 , B60T8/1761 , B60T8/1763 , B60T8/36 , B60T8/40
摘要： PROBLEM TO BE SOLVED: To exactly set braking pressures and their changes of a pair of wheels to conform to each other and improve vehicular braking performance in comparison with the case when target compression/decompression gradients are set to conform to each other. SOLUTION: A target wheel cylinder pressure Pti of each wheel is calculated in response to a braking manipulated variable of a driver (S20-70). When anti- skid control is necessary, a wheel cylinder pressure is controlled at a target wheel cylinder pressure for reducing braking slips of a wheel (S80-110). When only one of right and left wheels is under the anti-skid control, a target wheel cylinder pressure of a wheel in the opposite right or left side not under the anti-skid control is set at the same value as a target wheel cylinder pressure of a wheel under the anti-skid control, a linear valve is controlled on the basis of the target wheel cylinder pressure, and by this, wheel cylinder pressures of the right and left wheels are controlled at substantially the same pressure (S130-170).

32. 发明专利

JPH09249110A CONTROL DEVICE FOR VEHICLE 失效
公开(公告)号：JPH09249110A
公开(公告)日：1997-09-22
申请号：JP6138396
申请日：1996-03-18
申请人： TOYOTA MOTOR CORP
发明人： HARA MASAHIRO
IPC分类号： B60T8/58 , B60T8/1755
摘要： PROBLEM TO BE SOLVED: To prevent improper vehicle control caused by an error of lateral acceleration from being applied in a control device for a vehicle calculating the lateral acceleration based on the difference between the right and left wheel speeds and applying the vehicle control based on the lateral acceleration. SOLUTION: Wheel speed sensors 14RL, 14RR detecting the rotating speeds ωRL, ωRR of the left and right rear wheels RL, RR are provided. The correction coefficients KSRL, KSRR for the outer diameters of RL, RR in the straight travel state of a vehicle 10 are obtained. The difference ΔVWR=|VWRL-VWRR| between the wheel speeds of RL, RR is obtained based on ωRL, ωRR and KSRL, KSRR. The lateral acceleration Gy=KG.V0 .ΔVWR applied to the vehicle 10 is obtained based on ΔVWR, the estimated car body speed VS0 and a constant KG. When the lateral acceleration Gy exceeding the error range of Gy is generated, vehicle control is applied based on Gy.

33. 发明专利

JPH06127293A BRAKING DEVICE 失效
公开(公告)号：JPH06127293A
公开(公告)日：1994-05-10
申请号：JP30613992
申请日：1992-10-19
申请人： TOYOTA MOTOR CORP
发明人： SHIRAI KENJI , HARA MASAHIRO
IPC分类号： B60W10/00 , B60T8/32 , B60W10/04 , B60W10/06 , B60W10/10 , B60K41/28
摘要： PURPOSE:To provide a braking device which promptly determines the braking mode of an auxiliary brake in accordance with the braking operation speed of a main brake and performs correct auxiliary braking from the beginning. CONSTITUTION:A brake pedal operating speed is detected (S4), and if it is within a preset range (S8) shiftdown is usually performed from the fourth gear position to the third gear position (S9), but if it is faster than a preset value (S11) shiftdown is performed at once from the fourth gear position to the second gear position (S13). As an auxiliary braking mode can be determined on the way of braking operation, auxiliary braking delay during sudden braking is avoided to utilize auxiliary braking from the beginning of braking and poor comfortableness is avoided by the shiftdown after operating a main brake.

34. 发明专利

JP2003214464A CONTROL DEVICE OF VEHICLE 审中-公开
公开(公告)号：JP2003214464A
公开(公告)日：2003-07-30
申请号：JP2002009007
申请日：2002-01-17
申请人： TOYOTA MOTOR CORP , DENSO CORP
发明人： HARA MASAHIRO , NIHEI TOSHIHISA , MATSUI NARIYUKI , MATSUURA MASAHIRO
IPC分类号： B60W20/00 , B60K6/48 , B60K6/543 , B60K17/04 , B60W10/02 , F16D48/02 , B60K6/04
摘要： PROBLEM TO BE SOLVED: To provide a control device for a vehicle as improvement of a conventional technique in which transmission of an excessive load to the power source side can be precluded by disengaging a clutch to connect and disconnect the power transmission path in case the fluctuation of the brake torque is large, for example during ABS control, but this leads to a drop of the accelerating performance of the vehicle. SOLUTION: In case the brake torque to a driving wheel 52 fluctuates much, the degree of transmission of the power is reduced by sinking the engaging torques of a first clutch C1 and a second clutch C2 so as to prevent an excessive load from being transmitted to an engine 14 and a motor generator 16. If at this time the request for acceleration is large, only the second clutch C2 is disengaged, while the first clutch C1 remains in engagement, and thereby the accelerating performance is well secured while the total degree of transmission of the two clutches C1 and C2 is reduced. COPYRIGHT: (C)2003,JPO

35. 发明专利

JP2003089352A VEHICULAR CONTROL DEVICE 审中-公开
公开(公告)号：JP2003089352A
公开(公告)日：2003-03-25
申请号：JP2001283673
申请日：2001-09-18
申请人： TOYOTA MOTOR CORP
发明人： NIHEI TOSHIHISA , HARA MASAHIRO
IPC分类号： B60T8/58 , B60T8/1761
摘要： PROBLEM TO BE SOLVED: To exactly detect riding over a stepped part of a front wheel and certainly and effectively execute an appropriate vehicle control based on the result. SOLUTION: In the case where the vehicle is in the braking state (S20), in the case where an increase rate of height of the front wheel is an increase rate reference value or higher (S52); the height of the front wheel is a height reference value or higher (S54); right and left rear wheels are not subjected to an anti-skid control (S56); a speed-reduction degree of the vehicle is a speed- reduction degree reference value or higher (S58); the anti-skid control of the front wheel is started (S60); and a wheel acceleration of the front wheel is not higher than a wheel acceleration reference value or lower, it is judged as a condition that the front wheel rides over the stepped part (S70); a control amount of the anti-skid control is reduced (S300) and a braking force of the front wheel is increased at a predetermined increase slope (S150) when it is judged that the riding over the stepped part of the front wheel is completed (130).

36. 发明专利

JP2002356154A VEHICULAR BRAKING CONTROLLER 失效
公开(公告)号：JP2002356154A
公开(公告)日：2002-12-10
申请号：JP2001163217
申请日：2001-05-30
申请人： TOYOTA MOTOR CORP , DENSO CORP
发明人： HARA MASAHIRO , NIHEI TOSHIHISA , MATSUI NARIYUKI , MATSUURA MASAHIRO
IPC分类号： B60T8/58 , B60T8/1761
摘要： PROBLEM TO BE SOLVED: To exactly control increase and decrease of wheel cylinder pressure during predetermined braking control irrespective of a characteristic deviation in a linear valve. SOLUTION: A target wheel cylinder pressure Pti of each wheel is calculated in response to a braking manipulate variable of a driver (S20). When anti-skid control is necessary, the target wheel cylinder pressure Pti for reducing slippage is calculated (S30-80). A target driving current It to the linear valve is calculated on the basis of a deviation between the target wheel cylinder pressure Pti and an actual wheel cylinder pressure Pi (S100). The characteristic deviation of the linear valve is compensated (S130). When the anti-skid control is initiated in a condition with compensation of the characteristic deviation not finished, a target driving current Ita for initial decompression is incrementally changed (S160). The linear valve is controlled on the basis of the incrementally changed target driving current Ita (S180).

37. 发明专利

JP2002095107A BRAKING FORCE CONTROLLER FOR VEHICLE 失效
公开(公告)号：JP2002095107A
公开(公告)日：2002-03-29
申请号：JP2000280519
申请日：2000-09-14
申请人： TOYOTA MOTOR CORP
发明人： NIWA SATORU , HARA MASAHIRO
IPC分类号： B60T8/17 , B60L7/12 , B60L7/24 , B60L50/16 , B60T8/00 , B60L11/14
摘要： PROBLEM TO BE SOLVED: To prevent deceleration of a vehicle positively and effectively from changing suddenly due to a sudden drop in regenerative braking at the start of anti-skid control. SOLUTION: Target braking forces Fbft, Fbrt for front and rear wheels are computed based on the braking movement of a driver and a predetermined front and rear braking force distribution rate (S10-50), and the target regenerative braking forces Frgft, Frgrt for front and rear wheels are computed so that regenerative efficiency may be maximum based on the target braking force (S60). When the target generative braking force is reduced gradually in case that the anti-skid control may be started, and the target regenerative braking force is set to 0 when the anti-skid control is started (S72-98), the regenerative braking is performed so that the target regenerative braking force is at an upper limit, the actual regenerative braking forces Frgfa, Frgra are computed (S210-260), and target friction braking forces for front and rear wheels are controlled so as to be Fbft-Frgfa, Fbrt-Frgra respectively (S110-130).

38. 发明专利

JPH09254750A BRAKE CONTROL DEVICE FOR VEHICLE 失效
公开(公告)号：JPH09254750A
公开(公告)日：1997-09-30
申请号：JP6851996
申请日：1996-03-25
申请人： TOYOTA MOTOR CORP
发明人： HARA MASAHIRO
IPC分类号： B60T1/14
摘要： PROBLEM TO BE SOLVED: To prevent an assistant brake member from breaking down at running on a bad road or passing through step difference, concerning an assistant brake control device for vehicle generating assistant braking force by contacting an assistant brake member with the road surface. SOLUTION: When emergent brake operation is performed, assistant braking force is generated by contacting an assistant brake member with the road surface. It is discriminated whether emergent brake operation is performed or not, by the operating condition of a brake pedal (step 300). At emergent brake operation, it is discriminated whether it is during running on a bad road or during passing through step difference (step 302). When it is not during running on a bad road and not during passing through step difference, an assistant brake mechanism is operated (step 304). When it is during running on a bad road or during passing through step difference, operation of the assistant brake mechanism is stopped (step 306, 308).

39. 发明专利

JPH09254749A ASSISTANT BRAKE CONTROL DEVICE FOR VEHICLE 失效
公开(公告)号：JPH09254749A
公开(公告)日：1997-09-30
申请号：JP6679196
申请日：1996-03-22
申请人： TOYOTA MOTOR CORP
发明人： HARA MASAHIRO , SHIRAI KENJI
IPC分类号： B60T1/14
摘要： PROBLEM TO BE SOLVED: To prevent vehicle behavior from being disturbed due to assistant braking force, concerning an assistant brake control device for vehicle generating assistant braking force by contacting assistant brake members with the road surface on a low friction coefficient road. SOLUTION: Assistant brake mechanisms 10FR, 10FL are provided right and left symmetrically against the center line of a vehicle. When a road during running is a fixed low friction coefficient road and the vehicle is required to brake, the assistant brake mechanisms 10FR, 10FL are operated so that cylindrical bodies 12FR, 12FL are grounded. A yaw rate sensor 38 detecting the yaw rate γ of the vehicle is provided. When change Δγ over a fixed value is generated in the yaw rate γ accompanying operation of the assistant brake mechanisms 10FR, 10FL, the assistant brake mechanisms 10FR, 10FL are prohibited to operate.

40. 发明专利

JPH09193778A VEHICULAR WHEEL SPEED DETECTION DEVICE 失效
公开(公告)号：JPH09193778A
公开(公告)日：1997-07-29
申请号：JP464996
申请日：1996-01-16
申请人： TOYOTA MOTOR CORP
发明人： HARA MASAHIRO
IPC分类号： B60T8/66
摘要： PROBLEM TO BE SOLVED: To accurately control a turning motion at the time of mounting tires of different diameter by comparing a difference between right and left wheel speeds with the second value smaller than the first value in other, conditions, when the difference is less than the first value, and correcting the right and left wheel speeds, when any of the comparison results is equal to or above the first or the second value. SOLUTION: Wheel speeds detected with wheel speed sensors 63 to 66 in the condition where tires of different diameter are mounted, are corrected, using front wheels as control object wheels. That is, when the larger speed of the right and left front wheels is VFMAX, and the lower speed is VFMIN, a rough correction is made as a different diameter tire status 1, provided that a body travel speed VSO>=50km/h lasts for or more than two seconds, and 0.03× VFMAX is the first preset value and at VFMAX-VFMIN>=0.03×VFMAX. Furthermore. when this condition is not established, different diameter tire judgement 2 is made as detailed judgement, and a correction is made on the basis of a relationship of (VFMAX-VFMIN) >= (0.01×VFMAX), provided that the value of VSO>=80km/h lasts for or more than two seconds and 0.01×VFMAX is the second preset value.

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