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41. 发明专利

JPH0692161A BRAKING DEVICE 失效
公开(公告)号：JPH0692161A
公开(公告)日：1994-04-05
申请号：JP27238692
申请日：1992-09-16
申请人： TOYOTA MOTOR CORP
发明人： SHIRAI KENJI , HARA MASAHIRO , HIRAIWA HIROSHI
IPC分类号： B60R16/02 , B60W10/04 , B60W10/06 , B60W10/10 , B60W10/18 , B60W10/184 , B60W40/068 , B60K41/26
摘要： PURPOSE:To reduce an evil of action of an auxiliary braking device in a road of low friction by providing an auxiliary brake reducing means for reducing action of the auxiliary braking device in the case of small coefficient of friction as compared with in the case of large coefficient of friction. CONSTITUTION:When a car speed is a preset value or more by turning on a brake switch 18 to apply a main brake, a coefficient of road surface friction is compared with the first preset value, and an auxiliary brake is not applied, when smaller than the preset value, and suspended when already during the auxiliary brake. On the other hand, in the case that the coefficient is the preset value or more, a retarder 34 and an engine brake are actuated as an auxiliary brake device 28 by a command from an auxiliary brake control unit 46, and the coefficient of road surface friction is compared with the second preset value during operating the engine brake. Next in the case that this coefficient of road surface friction is the second preset value or more, a shift down is performed, and a condition, left as it is, is maintained when the coefficient is small.

42. 发明专利

JP2003089350A ABNORMALITY JUDGING DEVICE FOR WHEEL ROTATION SENSOR FOR VEHICLE 审中-公开
公开(公告)号：JP2003089350A
公开(公告)日：2003-03-25
申请号：JP2001283688
申请日：2001-09-18
申请人： TOYOTA MOTOR CORP
发明人： HARA MASAHIRO , NIHEI TOSHIHISA
IPC分类号： B60T8/171 , B60T8/00 , B60T8/1761 , B60T8/88
摘要： PROBLEM TO BE SOLVED: To prevent an erroneous judgment that a wheel rotation sensor is abnormal caused by an unnatural behavior of a vehicle in spite that the wheel rotation sensor is normal. SOLUTION: A judgment whether or not the vehicle is in the spinning state is carried out (S20) and a judgment whether or not the vehicle is in the climbing state is carried out (S30). When the vehicle is not in the spinning state or in the climbing state, a judgment whether or not the vehicle is in the stationary traveling state is carried out (S50). When the vehicle is in the stationary traveling state, a judgment whether or not a wheel speed sensor is abnormal is carried out by a judgment whether or not an output of the wheel speed sensor is inconsistent (S60). At the time of the normal judgment, a vehicle control is permitted based on a wheel speed (S80) and at the time of the abnormal judgment, the vehicle control is forbidden based on the wheel speed (S90). However, when the vehicle is in the spinning state or in the climbing state, the abnormal judgment of the wheel speed sensor is not carried out and a judgment result just before is maintained (S20, 30).

43. 发明专利

JP2002356152A VEHICULAR BRAKING CONTROLLER 失效
公开(公告)号：JP2002356152A
公开(公告)日：2002-12-10
申请号：JP2001162902
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： B60T8/48
摘要： PROBLEM TO BE SOLVED: To overcome the problem of not being able to provide sufficient effect of anti-skid control when an accumulator pressure is used during control of an electric command brake ECB, a master cylinder pressure is fed to a wheel cylinder during initialization, the anti-skid control is executed by switching to the accumulator pressure when execution conditions for the anti-skid control are satisfied during an initializing process, and the accumulator pressure is low. SOLUTION: When the execution conditions for the anti-skid control are satisfied in a state of feeding the fluid pressure of a master cylinder 12 to the wheel cylinder 90 and the fluid pressure of an accumulator 44 is insufficient from a perspective of a braking demand of a driver, the anti-skid control using the fluid pressure of the accumulator 44 as a pressure source is prohibited.

44. 发明专利

JPH1120673A BRAKING FORCE CONTROL DEVICE 失效
公开(公告)号：JPH1120673A
公开(公告)日：1999-01-26
申请号：JP18281997
申请日：1997-07-08
申请人： TOYOTA MOTOR CORP
发明人： NAKANISHI NOBUYASU , YAMADA AKIRA , SHIMIZU SATOSHI , AIZAWA HIDEYUKI , HARA MASAHIRO
IPC分类号： B60T8/00 , B60T13/66
摘要： PROBLEM TO BE SOLVED: To provide in constitution with short pipe length such a function that brake fluid pressure higher than that of usual time is generated when urgent braking operation is actuated. SOLUTION: In this device, disposed is a pump 76 provided with a suction hole communicatable to a hydraulic passage 22 communicating to a master cylinder 18, and a delivery hole communicatable to wheel cylinders 50, 52. The first master cut valve 28 and the first relief valve 34 are arranged between the master cylinder 18 and the wheel cylinders 50, 52. The first master cut valve 28 is usually kept in opened condition. When urgent brake operation is actuated, the first master cut valve 28 is brought into closed condition, a suction valve 78 is opened, and the pump 76 is made into ON-condition. Relief pressure of the first relief valve 34 is set to a prescribed assist pressure Pa.

45. 发明专利

JPH10305766A BRAKE HYDRAULIC CONTROL DEVICE 失效
公开(公告)号：JPH10305766A
公开(公告)日：1998-11-17
申请号：JP28728297
申请日：1997-10-20
申请人： TOYOTA MOTOR CORP
发明人： HARA MASAHIRO , OKA HIROAKI
IPC分类号： B60T8/00
摘要： PROBLEM TO BE SOLVED: To properly execute a hydraulic control regardless of non-uniformity between a master outflow amount and a wheel inflow amount, relating to a brake hydraulic control device generating a wheel cylinder pressure of high pressure as compared with a master cylinder pressure under a prescribed condition. SOLUTION: When emergency brake operation is detected, BA control supplying a brake fluid from a front/rear pump 170, 172 to a wheel cylinder 142, 144, 146, 148 is started. When the BA control is started, as compared with an outflow amount QM/C from a master cylinder 18, a fluid amount QW/C in the wheel cylinder 142, 144, 146, 148 is increased to a large amount. As compared with the master outflow amount QW/C, in order to prevent returning to the master cylinder 18 of a large amount of brake fluid, in the case that a fluid amount QIN supplied from the pump exceeds a prescribed value, further increasing of the fluid amount QIN is inhibited.

46. 发明专利

JPH10244925A BRAKING FORCE CONTROLLER 失效
公开(公告)号：JPH10244925A
公开(公告)日：1998-09-14
申请号：JP5351397
申请日：1997-03-07
申请人： TOYOTA MOTOR CORP
发明人： HARA MASAHIRO
IPC分类号： B60T8/00 , B60T8/58 , B60T8/88
摘要： PROBLEM TO BE SOLVED: To prevent the consumption of a large amount of the braking liquid stored in a reserver tank, by comprising an abnormality detecting means for detecting the abnormality of a liquid-operated circuit for guiding the braking liquid pressure generated by an assist pressure generating means, to a wheel cylinder, and forbidding the execution of the brake assist control when the abnormality is detected. SOLUTION: The existence of the requirement of the start of the BA(brake assist) control is judged in an ECU 10 during the operation, and whether the abnormality of a liquid-operated circuit is detected or not, is judged, when the requirement exists. When the abnormality is not detected, the processing for increasing, decreasing or holding the assist pressure is executed corresponding to a condition of the braking operation. Further whether the finish condition of the BA control is fulfilled or not, is judged, and it is judged that the finish condition of the BA control is fulfilled, in a case when the stepping of a brake pedal 12 is released, or the like. When it is judged that the abnormality of the liquid-operated circuit is detected, the processing for finishing the BA control is executed. Whereby the consumption of the braking liquid can be inhibited.

47. 发明专利

JPH1081217A BRAKING FORCE DISTRIBUTION CONTROLLER 失效
公开(公告)号：JPH1081217A
公开(公告)日：1998-03-31
申请号：JP23785396
申请日：1996-09-09
申请人： TOYOTA MOTOR CORP
发明人： HARA MASAHIRO , CHIBA TADASHI
IPC分类号： B60T8/26 , B60T8/1764 , B60T8/1766 , B60T8/28 , B60T8/58
摘要： PROBLEM TO BE SOLVED: To prevent any malfunction in braking force distribution control from occurring by prohibiting this braking force distribution control irrespective of conditions at a time when both front and rear wheels are directly driven. SOLUTION: At the outset, a judgment of whether a control permission condition is satisfied or not is carried our (step 101). Suppose this control permission condition is satisfied, whether a differential lock signal, namely, a signal showing that a differential lock is an on-state is detected or not is judged (step 102). When it is not detected, a fact of whether a control starting condition is satisfied or not is judged (step 103). At this time, when the lock is not detected, braking force distribution control is returned to the start without being carried out, so a judgment of the control permission condition is carried out again (step 101). With this constitution, in time of a center differential locking state, the braking force distribution control is not stared irrespective of control conditions.

48. 发明专利

JPH09175356A BRAKE CONTROLLER FOR VEHICLE 失效
公开(公告)号：JPH09175356A
公开(公告)日：1997-07-08
申请号：JP33449095
申请日：1995-12-22
申请人： TOYOTA MOTOR CORP
发明人： HARA MASAHIRO
IPC分类号： B60T8/24 , B60T8/1755 , B60T8/58
摘要： PROBLEM TO BE SOLVED: To prevent the understeer tendency of a vehicle by distribution control, by limiting the control of vehicle behavior, in the case that it detects the large deceleration above the preset specified value, a braking in turning. SOLUTION: This controller judges whether it is distribution control or not by whether the actual measurement value Gy of the lateral acceleration detected by an acceleration sensor 62a is larger than the threshold GY0 or not, and whether the actual measurement value Gx of longitudinal acceleration detected by an acceleration sensor 62b or the estimated car body deceleration dVSO/dt detected from the wheel speed Vw detected by wheel sensors 63-66 is smaller than 0.4G or not. If it is in a distribution control operation state, this judges whether it is ABS operation or not. If it is ABS operation, this performs ABS control preferentially. If it is not ABS operation, this judges whether it is high deceleration or not, that is, it is in a high G control state or not. At this time, this stops the distribution control at high G control where Gx or dVSO/dt is larger than 0.5G.

49. 发明专利

JPH08253123A ANTISKID BRAKE CONTROL DEVICE OF VEHICLE 失效
公开(公告)号：JPH08253123A
公开(公告)日：1996-10-01
申请号：JP5945095
申请日：1995-03-17
申请人： TOYOTA MOTOR CORP
发明人： SAKAI AKIRA , NAKAMURA AKIRA , WATABE YOSHITOMO , HARA MASAHIRO
IPC分类号： B60G7/00 , B60T8/1761 , B60T8/58
摘要： PURPOSE: To further improve reliability to failure by providing a fluid pressure control means to control fluid pressure of a brake device so that at least one among respective wheels is not put in a skid condition by mechanically comparing mechanically inputted car body braking force and wheel braking force with each other. CONSTITUTION: Car body braking force is transmitted as longitudinal force (f), and the longitudinal force (f) is inputted to a left end surface 12a of a first piston 12. A pressure receiving surface 12b of this first piston 12 has the cross- sectional area S1, and the first piston 12 moves between two stoppers 22 and 24 by the force relationship with brake fluid pressure Pm (of pressing force), and fulfills a function of a comparing means of car body braking force and wheel braking force. That is, the brake fluid pressure Pm is controlled so that left front wheels or right front wheels are not put in a skid condition by a movement of the first piston 12. In this way, antiskid control is purely mechanically performed without using an electronic circuit at all.

50. 发明专利

JPH08133049A BRAKING FORCE CONTROLLER 失效
公开(公告)号：JPH08133049A
公开(公告)日：1996-05-28
申请号：JP27116994
申请日：1994-11-04
申请人： TOYOTA MOTOR CORP
发明人： HARA MASAHIRO
IPC分类号： B60T8/48 , B60T8/1761 , B60T8/1766 , B60T8/58
摘要： PURPOSE: To provide a braking force controller in which braking force according to the deflection condition of each tire at the time of braking can be distributed to each wheel. CONSTITUTION: When a brake switch 67 is turned on, acceleration detected by an acceleration sensor 62, a rotational speed of each wheel detected by a wheel rotation sensors 63 to 66 and a vehicle body speed detected by a speed sensor 61 are read in an anti-lock braking force controller 60. When the slip ratio of a rear wheel is smaller than the threshold value of an anti-lock braking force control region, the correction value of the actual outer diameter of a tire with the movement of a load is computed. After that, the target wheel speed of a rear wheel on the basis of the actual outer diameter of a tire with the deflection condition of the tire with the movement of a load being taken into consideration is computed, and pressure-increase hydraulic switching valves 13, 14 or pressure-reduction hydraulic switching valves 17, 18 on the rear wheel side are opened and closed by comparing the target wheel speed of the rear wheel with the wheel speed of the rear wheel which is detected by the wheel rotational speed sensors 64, 65.

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