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1. 发明专利

JPH07233833A HYDROPNEUMATIC CYLINDER 失效
公开(公告)号：JPH07233833A
公开(公告)日：1995-09-05
申请号：JP2275994
申请日：1994-02-21
申请人： TOYOTA MOTOR CORP , AISIN SEIKI
发明人： SANO KATSUYUKI , YASUIKE OSAMU , KATO KIMITOSHI , HAYASHI KENJI , FURUKAWA TAMOTSU , TERADA HIROYUKI , KOBAYASHI HIDEYUKI
IPC分类号： B60G17/015 , B60G13/06 , B60K17/08 , F16F9/06 , F16F9/08 , F16F9/50
摘要： PURPOSE:To permit the car height adjustment by sending the working fluid on the low pressure side, under pressure to the high pressure side by the rebound operation of a wheel. CONSTITUTION:A hydropneumatic cylinder 1 consists of a cylinder body 2, inside cylinder 3, piston 4, hollow piston rod 5, hollow pump rod 6, pump part 7, and a communication mechanism 8. The pump part 7 has a pump chamber 7a into which the working fluid in a low pressure chamber 22 is sucked by the rebound operation of a wheel where the piston 4 shifts in the compression direction, and discharges the working fluid which is sucked into the pump chamber 7a by the rebound operation of the wheel in which the piston 4 shifts in the extension, into a high pressure working fluid chamber 14 as high pressure chamber.

2. 发明专利

JPH07137521A HYDRO-PNEUMATIC SUSPENSION 失效
公开(公告)号：JPH07137521A
公开(公告)日：1995-05-30
申请号：JP31407993
申请日：1993-11-19
申请人： AISIN SEIKI , TOYOTA MOTOR CORP
发明人： KATO KIMITOSHI , TERADA HIROYUKI , SANO KATSUYUKI , KIMURA YUKIHIDE
IPC分类号： B60G15/12 , B60G17/033 , B60G17/04 , B60G17/044
摘要： PURPOSE:To prevent the difference in car height ascending time between a right and a left wheel, and concurrently prevent the inclination of a vehicle and running stability from being degraded by making at least either pump, the gas spring or the other component one in number, which consist of a height adjusting mechanism, and thereby integrally controlling the car height of the right and left wheels. CONSTITUTION:A pump 32 is formed within the piston rod 3 of a left absorber, in which a pump rod 4 is inserted. An inlet valve 43 formed in the pump rod 4 is communicated with a low pressure chamber 13, and is concurrently communicated with the pump 32. An outlet valve 36 formed in the piston rod 3 is communicated with the pump 32, and is concurrently communicated with each operating chamber 21 and each gas spring 5. Since the heights of the right and left absorbers are adjusted by the pump 3 built in the left absorber, even if there exists the difference in a road condition between a right and a left wheel, the occurrence of the difference in height ascending time between the right and left wheels is prevented, and thereby the inclination of a vehicle and running stability can be prevented from being degraded.

3. 发明专利

JPH07145845A HYDRONEUMATIC CYLINDER 失效
公开(公告)号：JPH07145845A
公开(公告)日：1995-06-06
申请号：JP32133393
申请日：1993-11-25
申请人： AISIN SEIKI , TOYOTA MOTOR CORP
发明人： HAYASHI KENJI , TERADA HIROYUKI , SANO KATSUYUKI
IPC分类号： B60G15/12 , F16F9/50
摘要： PURPOSE:To prevent worsening of a riding sensation and driving stability by a method wherein a damping force is compensated according to the change of a car weight and damping characteristics responding to a car weight are realized. CONSTITUTION:In a hydraulic pneumatic cylinder, the opening pressures of damping force generating valves 61 and 71 formed to a piston 31 and a base valve member 7, respectively, are regulated by opening pressure regulating means 62 and 72 by utilizing the pressure changes of a working chamber 21 and a high pressure chamber 52 responding to the change of a car weight. Thus, a damping force is effectively compensated according to the change of a car weight to realize optimum damping characteristics responding to the change of the car weight, and worsening of a riding sensation and drive stability is prevented from occurring. A coil spring 65 and a leaf spring 64 are disposed above and below a piston 31 and a base valve member 7, and a damping force is regulatable both on the expansion side and the contraction side of an absorber. Thus, a variable range in a wide range is realized and an ideal damping force is generated.

4. 发明专利

JPH04303009A SUSPENSION DEVICE FOR VEHICLE 失效
公开(公告)号：JPH04303009A
公开(公告)日：1992-10-27
申请号：JP9363191
申请日：1991-03-29
申请人： AISIN SEIKI
发明人： TERADA HIROYUKI , HATTORI MASAHITO , FUKUDA MASAHIRO , ISOTANI SHIGETAKA , YAMAGUCHI NAOKI , NAGURA HAJIME
IPC分类号： B60G17/015 , B60G17/04
摘要： PURPOSE:To improve suspension performance when a vehicle travels a rough road exceeding the limit of control follow-up ability. CONSTITUTION:In a suspension device for a vehicle, a rough road travel determining means (d) that determines whether or not the vehicle is travelling a rough road exceeding the limit of control follow-up ability based on the signal from a sensor 7, and a driving means (e) that outputs control signal to a bypass valve 6 when it is determined that the vehicle is travelling a rough road exceeding the limit of control follow-up ability by this rough road travel determining means (d) to make the aforementioned line pressure less than a specified value are provided.

5. 发明专利

JPH04303008A SUSPENSION DEVICE FOR VEHICLE 失效
公开(公告)号：JPH04303008A
公开(公告)日：1992-10-27
申请号：JP9363091
申请日：1991-03-29
申请人： AISIN SEIKI
发明人： TERADA HIROYUKI , HATTORI MASAHITO , FUKUDA MASAHIRO , ISOTANI SHIGETAKA , YAMAGUCHI NAOKI , NAGURA HAJIME
IPC分类号： B60G17/015 , B60G17/04
摘要： PURPOSE:To reduce wasteful energy consumption by reducing pump load. CONSTITUTION:In a suspension device for a vehicle, a bypass valve 8 is made controllable the line pressure inside a supply passage P1 infinitely variable in response to the action of said bypass valve 8 as a line pressure control valve, and a line pressure control means (d) that controls action of the bypass valve 8 so that the line pressure becomes of a higher value than target control pressure by a specified amount at the normal time of a sensor 9 is added to a bypass valve control means (c), and, at the same time, a correcting means (e) that corrects the action control of a pressure control valve 6 in response to the line pressure is added to a pressure valve control means (b).

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