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21. 发明专利

JPS63145162A BRAKE DEVICE FOR VEHICLE 失效
公开(公告)号：JPS63145162A
公开(公告)日：1988-06-17
申请号：JP29128786
申请日：1986-12-06
申请人： TOYOTA MOTOR CORP
发明人： KUROSAWA RYUICHI
IPC分类号： B60T8/72 , B60T8/1761 , B60T8/66
摘要： PURPOSE:To suppress the discomfortable feeling due to the swing back in the case when a car stops, by installing a hydraulic brake system, car speed detection means, increased brake pedal stepping-in detecting means, decompression pattern changing means, and a decompression control means onto a brake device for vehicle. CONSTITUTION:A hydraulic brake system for controlling the revolution of wheels according to the stepping-in of a brake pedal is provided, and a decompression control means which lowers the hydraulic pressure in the hydraulic brake system in exponential function form according to the previously set decompression pattern and reduces the deceleration speed to zero simultaneously with the reduction of car speed to zero is provided. Further, in a brake device, the increased stepping-in is detected by an increased brake pedal stepping-in detecting means, when the brake pedal is stepped in furthermore during the control by a decompression control means. The decompression pattern is changed to the more sharp decompression pattern on the basis of the detection by the increased stepping-in detecting means.

22. 发明专利

JPS63130458A BRAKE DEVICE FOR VEHICLE 失效
公开(公告)号：JPS63130458A
公开(公告)日：1988-06-02
申请号：JP27717786
申请日：1986-11-20
申请人： TOYOTA MOTOR CORP
发明人： KUROSAWA RYUICHI
IPC分类号： B60T7/12 , B60T8/1761 , B60T8/58 , B60T8/66
摘要： PURPOSE:To enable both vehicle speed and deceleration to be smoothly lowered to zero and completely prevent shake back by providing a fluid pressure brake system, a vehicle speed detecting means, and a means of exponentially lowering fluid pressure after lowering a detected vehicle speed to a reference speed. CONSTITUTION:When the pressing force to a pedal 170 is large with respect to the friction coefficient of a road surface, the slip ratio of a front wheel 176 increases above a proper range, and a controller 252 which receives this from the detected signal of a sensor 246 feeds a current to the solenoid of an electromagnetic control valve 192 to shut off the valve 192 or to switch over it to a pressure drop allowable condition while starting a pump 216. And, in the case of the shut off condition, a wheel cylinder 180 is disconnected from a master cylinder 174 and a reservoir 210 to keep a hydraulic pressure constant, thereby, keeping the braking force to the front wheel 176 constant. In the case of the pressure drop allowable condition, on the other hand, the cylinder 180 is connected to the reservoir 210 and a brake fluid from the cylinder 180 is stored in the reservoir 210 and scooped up and returned to a passage 176 by means of the pump 216.

23. 发明专利

JPS62168704A SHOCK ABSORBER CONTROL DEVICE 失效
公开(公告)号：JPS62168704A
公开(公告)日：1987-07-25
申请号：JP25041986
申请日：1986-10-21
申请人： TOYOTA MOTOR CORP
发明人： KUROSAWA RYUICHI , YAMAMOTO YUKIO , TANAKA RYUJI , SHIRASU TAKASHI , ODA SUSUMU , IWASE HIROHIDE
IPC分类号： F16F9/50 , B60G17/015 , B60G17/018 , B60G17/08
摘要： PURPOSE:To shorten the time from the time point at which a vehicle body vertically oscillates to the time point at which the vehicle body returns to its neutral vehicle height level, by decreasing the damping force of a shock absorber until the midway of return of the vehicle body to its neutral vehicle height level, and by increasing the damping force after the midway of the return. CONSTITUTION:A means M1 detects the vertical motion of a vehicle body. Further a means M2 changes the damping force of a shock absorber disposed between the vehicle body and the wheel in accordance with an instruction fro the outside. During a predetermined time during which the vertical motion of the vehicle body detected by the means M1 changes in the direction toward the neutral vehicle height level, a means M3 delivers a signal for changing the damping force into a large value, to the means M3. With this arrangement the damping force of the shock absorber is held at a small value until the midway of return oscillation in which the vehicle body is moved from the neutral vehicle height level and is then moved back to the neutral vehicle height level so that the oscillation of the vehicle body is rapidly settled. Meanwhile after the midway of the return, the damping force is increased to restrain the oscillation of the vehicle body.

24. 发明专利

JPS62152910A ACTIVE SUSPENSION FOR VEHICLE 失效
公开(公告)号：JPS62152910A
公开(公告)日：1987-07-07
申请号：JP29594385
申请日：1985-12-26
申请人： TOYOTA MOTOR CORP
发明人： KUROSAWA RYUICHI
IPC分类号： B60G17/00 , B60G17/015 , B60G17/016 , B60G17/018
摘要： PURPOSE:To prevent rolling of a car body and to maintain steer characteristics at optimum, by a method wherein acceleration in the direction of the width of a car and a roll angle acceleration of a car body are respectively detected to effect given computation, and according to the computing result, the magnitude of a force exerted between a wheel and a car body is controlled. CONSTITUTION:When a vehicle is turned, for example, to the left, since signals alphaand gamma outputted from sensors 19 and 20, respectively, are both positive, only alphak1 amplified by an amplifier 22 passes through a change-over switch 24, and is inputted to distributors 25 and 26. An output signal Falpha from the distributor 25 is increased Nf-fold, and is sent through an adder 47 to a servo actuator 1fr for right front wheel. According to an increase amount of a load exerted between a right front wheel and a car body 3, the differential pressure of the actuator 1fr for a right front wheel is increased over a specified value. An output signal from the distributor 25 is sent to a code inverter 27, and the differential pressure of the actuator 1fr for a left front wheel is decreased over a specified value.

25. 发明专利

JPS61181713A VEHICLE ACTIVE SUSPENSION 失效
公开(公告)号：JPS61181713A
公开(公告)日：1986-08-14
申请号：JP2152385
申请日：1985-02-06
申请人： TOYOTA MOTOR CORP
发明人： KUROSAWA RYUICHI
IPC分类号： B60G17/00 , B60G17/015
摘要： PURPOSE:To enhance the comfortability and control stability of a vehicle during turning, by calculating variations in load between wheels and a vehicle body from vehicle-widthwise accelerations to drive actuators so that the forces between the vehicle body and the wheels are amplified. CONSTITUTION:Signals alpha, gamma from a vehicle-widthwise acceleration sensor 19 and a roll angle acceleration sensor 20 are amplified and then delivered to a change-over switch 24, and are further amplified by amplifiers 22, 23 and determined as to their accelerating directions. Distributors 25, 26 compute variations in load between wheels and a vehicle body, and deliver control amounts alphak1Nf, alphak1Nr for driving front and rear wheel servo-actuators. These signals drive the front and rear right wheel servo-actuators 1fr, 1rr and are reversed in their signs to control left servo-actuators 1fl, 1rl. With this arrangement, it is possible to enhance the comfortability and control stability of the vehicle upon turning.

26. 发明专利

JPS641613A ACTIVE SUSPENSION FOR VEHICLE 失效
公开(公告)号：JPS641613A
公开(公告)日：1989-01-06
申请号：JP15626187
申请日：1987-06-23
申请人： TOYOTA MOTOR CORP
发明人： KUROSAWA RYUICHI
IPC分类号： B60G17/00 , B60G17/015 , B60G17/016
摘要： PURPOSE:To improve comfortability and manuevering stability by obtaining fluctuations of load functioning between body and wheels caused by turning and side wind respectively based on lateral acceleration and roll angle acceleration, then distributing the fluctuation to front and rear wheels and controlling respective actuators. CONSTITUTION:A lateral acceleration signal and a roll angle acceleration signal are fed respectively from a lateral acceleration sensor 19 and a roll angle acceleration sensor 20, then they are added in adders 24, 25 through amplifiers K1-K4, so as to operate fluctuations Fs, Fw of load functioning between wheel and body caused respectively by turning and side wind. Then outputs from the adders 24, 25 are distributed based on potential ratio between amplifiers 28, 29 and 30, 31 and fed to adders 32, 33 where they are added. Then servo actuators 1fl-1rr for front right and left wheels are controlled based on the results. With such arrangement, steering characteristic can be optimized upon exposure to side wind during turning.

27. 发明专利

JPS62166104A CONTROLLING FOR SHOCK ABSORBER 失效
公开(公告)号：JPS62166104A
公开(公告)日：1987-07-22
申请号：JP750986
申请日：1986-01-16
申请人： TOYOTA MOTOR CORP
发明人： KUROSAWA RYUICHI , IWASE HIROHIDE
IPC分类号： B60G17/06 , B60G17/015 , B60G17/018
摘要： PURPOSE:To change properly a damping force and improve riding quality in a variable damping force shock absorber by constitutionally increasing the damping force during a predetermined period in which detected car height exceeds a predetermined value and then reaches the neutral car height. CONSTITUTION:Car height detected by car height sensors H1L, H1R, H2C are sent to the input of an electronic controller ECH4 which obtains the average of input car height or the highest car height to determine car height A and compare it with a car height change set value A0. And when the car height A exceeds the set value A0 current is supplied to damping force actuators A1L, A1R, A2L and A2R after waiting by a predetermined Lime-lag tb to change largely the damping force. Then ECU4 detects the car height A, judges whether or not it returns to the neutral car height and changes the damping force smaller when it returns to the neutral one. Thus, th damping force can be changed every half cycle to improve riding quality.

28. 发明专利

JPS61181715A VEHICLE ACTIVE SUSPENSION 失效
公开(公告)号：JPS61181715A
公开(公告)日：1986-08-14
申请号：JP2152585
申请日：1985-02-06
申请人： TOYOTA MOTOR CORP
发明人： KUROSAWA RYUICHI
IPC分类号： B60G17/00 , B60G17/015
摘要： PURPOSE:To enhance the comfortability and control stability of a vehicle, by providing such an arrangement that servo-actuators are controlled in accordance with variations in load caused by vehicle-widthwise accelerations if the vehicle- widthwise accelerations and roll angle accelerations are in the same direction, but in accordance with variations caused by roll angle accelerations if the both kinds of accelerations are in different directions. CONSTITUTION:Variations in load between wheels and a vehicle body are computated in accordance with accelerations, that is, vehicle-widthwise ac celerations alpha, and roll angle accelerations gamma detected by sensors 19, 20 through amplifiers 22, 23 and distributors 25, 26, and are distributed to front and rear wheels to controls left servo-actuators 1fr, 1rr. Further, the computed variations are also delivered to left side servo-actuator 1fl, 1rl through sign reversers 27, 28 to control the latter. In this arrangement, control is made in accordance with a vehicle-widthwise acceleration signal alpha if both acceleration signals gamma, are in the same direction but in accordance with the roll angle acceleration signal alpha if both are in different directions. With this arrangement, it is possible to enhance the comfortability and control stability when the vehicle turns or is subjected to a side wind.

29. 发明专利

JPS61181714A VEHICLE ACTIVE SUSPENSION 失效
公开(公告)号：JPS61181714A
公开(公告)日：1986-08-14
申请号：JP2152485
申请日：1985-02-06
申请人： TOYOTA MOTOR CORP
发明人： KUROSAWA RYUICHI
IPC分类号： B60G17/00 , B60G17/015
摘要： PURPOSE:To enhance the comfortability and control stability of a vehicle during acceleration, by calculating variations in load between wheels and a vehicle body from vehicle-longitudinal accelerations to drive actuators so that the forces between the vehicle body and the wheels are controlled. CONSTITUTION:When a vehicle is accelerated, a longitudinal acceleration sensor 21 detects the acceleration to issue a detection signal beta. This detection signal betais amplified by an amplifier 29 and a negative signal Fbeta(betak3) is delivered to a front right wheel servo-actuator 1fr and a front left wheel servo-actuator 1fl. Further, the same signal is delivered to rear right and left wheel servo- actuators 1rr, 1rl through a sign reversers 30, 31, respectively. With this arrangement, the actuators 1fr, 1fl, 1rr, 1rl are controlled, corresponding to variations in load between the wheels and the vehicle body in association with the longitudinal accelerations. Upon deceleration the signal is reversed. With this arrangement, it is possible to enhance the comfortability and control stability of the vehicle.

30. 发明专利

JPS63315313A ACTIVE SUSPENSION FOR VEHICLE 失效
公开(公告)号：JPS63315313A
公开(公告)日：1988-12-23
申请号：JP15078587
申请日：1987-06-17
申请人： TOYOTA MOTOR CORP
发明人： KUROSAWA RYUICHI
IPC分类号： B60G17/00 , B60G17/015
摘要： PURPOSE:To well control an attitude of a vehicle by calculating target centripetal acceleration while a change amount of load acting between a car body and a wheel thus controlling each actuator corresponding to each wheel being based on a car speed and a steering angle. CONSTITUTION:Each detection signal from each acceleration sensor 19, 21 in car width and longitudinal directions of a vehicle, steering angle sensor 32 and a car speed sensor 34 is respectively input to a distributor 23. And the distributor 23 calculates each value Nf, Nr for distributing a change amount of load, caused by acceleration in the car width direction acting between a wheel and a car body, to front and rear wheels by a proportion of Nf:Nr to be respectively output to each multiplier 25, 26. While a signal of each multiplier 25, 26 is respectively output to each servo actuator 1fl-1rr provided respectively corresponding to each wheel in the longitudinal right and left of the vehicle. Here being based on a deviation between the target centripetal acceleration and the actual centripetal acceleration, each value Nf, Nr is corrected being increased and decreased so that this deviation gradually decreases.

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