Vehicle suspension system
阅读：993发布：2022-01-26
专利汇可以提供Vehicle suspension system专利检索，专利查询，专利分析的服务。并且An accumulator is divided by two diaphragms into two auxiliary fluid chambers forming an auxiliary gas chamber therebetween. The fluid chambers of two hydropneumatic suspension struts are connected to the respective auxiliary fluid chambers through a spool valve normally open for unrestricted fluid flow between the fluid chambers of the struts and their respective auxiliary fluid chambers. When one wheel hits a road hump or elevation, fluid from the affected strut flows into the respective auxiliary fluid chamber increasing the auxiliary gas chamber pressure which in turn is applied through the diaphragm to the other auxiliary fluid chamber causing fluid to flow therefrom into the respective strut to increase the effective length thereof. A sensor for sensing a large horizontal force exerted on the vehicle is connected to the valve spool closing the spool valve during a high speed turn when the horizontal force is sensed. The total volume of air available for absorbing the tendency of the vehicle to tilt is thus reduced to the volume of the gas chamber of the hydropneumatic strut affected, increasing the resistnace to tilting. In another embodiment, the spool valve is arranged to isolate the fluid chamber of each suspension strut also from a fluid pump and reservoir of a levelling device to prevent deterioration of driveability.，下面是Vehicle suspension system专利的具体信息内容。
1. In a vehicle suspension system of the strut type, comprising first and second suspension struts having cylinders formed therein with fluid chambers filled with pressurized fluid and pistons slidably accommodated in said cylinders and provided with piston rods, hydropneumatic spring means connected to said cylinders and having gas chambers, and levelling means having a fluid pump fed from a fluid reservoir to pump fluid under pressure through at least one levelling valve responsive to the vehicle level and arranged to communicate with said fluid reservoir and first and second suspension struts to automatically maintain the effective lengths of said suspension struts constant independently of the load of the vehicle; the improvement comprising accumulator means having two auxiliary fluid chambers and at least one auxiliary gas chamber formed therebetween; normally open valve means connected to and between the two auxiliary fluid chambers and the respective fluid chambers of said first and second suspension struts; and sensor means for sensing a horizontal component of force exerted on the vehicle said sensor means being operatively connected to said valve means to close said valve means to isolate said two auxiliary fluid chambers of said accumulator means from said respective fluid chambers of said first and second suspension struts in response to exertion of said horizontal component of force being sensed, in which the accumulator means includes a cylinder, two pistons slidably mounted within the cylinder, and two spring members for urging the respective pistons away from each other, the auxiliary gas chamber being defined between the two pistons.
2. In a vehicle suspension system of the strut type, comprising first and second suspension struts having cylinders formed therein with fluid chambers filled with pressurized fluid and pistons slidably accommodated in said cylinders and provided with piston rods, hydropneumatic spring means connected to said cylinders and having gas chambers, and levelling means having a fluid pump fed from a fluid reservoir to pump fluid under pressure through at least one levelling valve responsive to the vehicle level and arranged to communicate with said fluid reservoir and first and second suspension struts to automatically maintain the effective lengths of said suspension struts constant independently of the load of the vehicle; the improvement comprising accumulator means having two auxiliary fluid chambers and at least one auxiliary gas chamber formed therebetween; normally open valve means connected to and between the two auxiliary fluid chambers and the respective fluid chambers of said first and second suspension struts; and sensor means for sensing a horizontal component of force exerted on the vehicle, said sensor means being operatively connected to said valve means to close said valve means to isolate said two auxiliary fluid chambers of said accumulator means from said respective fluid chambers of said first and second suspension struts in response to exertion of said horizontal component of force being sensed, in which the accumulator means includes a housing, two diaphragm members, and two spring members for urging the respective diaphragm members away from each other, the auxiliary gas chamber being defined between the two diaphragm members, in which the accumulator means includes first and second auxiliary fluid chambers defined within the housing on the sides of their associated diaphragm members opposite to the auxiliary gas chamber, in which the normally open valve means comprises a horizontally disposed valve cylinder; and axially movable spool within the valve cylinder; and two spring members for urging the spool in the opposite directions to resiliently hold it in a neutral position, the valve cylinder having a first port connected to the fluid chamber of the first suspension strut, a second port connected to the first auxiliary fluid chamber of the accumulator means, a third port connected to the fluid chamber of the second suspension strut and a fourth port connected to the second auxiliary fluid chamber of the accumulator means, the spool having first and second annular grooves formed therein, the first and second annular grooves providing communications between the first and second ports and between the third and fourth ports when the spool is held in the neutral position.
3. A system as claimed in claim 2, in which the sensor means comprises a weight mounted on one end of a lever pivotally mounted on the valve cylinder and having the other end operatively connected with the spool.
4. In a vehicle suspension system of the strut type, comprising first and second suspension struts having cylinders formed therein with fluid chambers filled with pressurized fluid and pistons slidably accommodated in said cylinders and provided with piston rods, hydropneumatic spring means connected to said cylinders and having gas chambers, and levelling means having a fluid pump fed from a fluid reservoir to pump fluid under pressure through at least one levelling valve responsive to the vehicle level and arranged to communicate with said fluid reservoir and first and second suspension struts to automatically maintain the effective lengths of said suspension struts constant independently of the load of the vehicle; the improvement comprising accumulator means having two auxiliary fluid chambers and at least one auxiliary gas chamber formed therebetween; normally open valve means connected to and between the two auxiliary fluid chambers and the respective fluid chambers of said first and second suspension struts; and sensor means for sensing a horizontal component of force exerted on the vehicle, said sensor means being operatively connected to said valve means to close said valve means to isolate said two auxiliary fluid chambers of said accumulator means from said respective fluid chambers of said first and second suspension struts in response to exertion of said horizontal component of force being sensed, in which the valve means is arranged to isolate the at last one levelling valve from the fluid pump and the fluid reservoir in response to the horizontal component of force being sensed, in which the valve cylinder includes a fifth port connected to the fluid pump, a sixth port connected to an inlet of the at least one levelling valve, a seventh port connected to an outlet of the at least one levelling valve and an eight port connected to the fluid reservoir, the spool having third and fourth annular grooves formed therein, the third and fourth annular grooves providing communications between the fifth and sixth ports and between the seventh and eighth ports when the spool is held in the neutral positions.
5. A hydropneumatic suspension system for a motor vehicle having a body and wheel supporting means, comprising first and second suspension struts each of which is mounted between said vehicle body and said wheel supporting means and has a chamber filled with pressurized hydraulic fluid, each of said suspension struts being retractable and extensible in response to relative movement between said vehicle body and said wheel supporting means to increase and reduce, respectively, the pressure of the hydraulic fluid in the corresponding chamber, a hydraulic fluid pressure source and a hydraulic fluid reservoir fluidly communicable with said chambers of said suspension struts to supply and discharge hydraulic fluid into and from, respectively, said chambers thereby maintaining the height of said vehicle body substantially constant independently of the load of said vehicle, levelling means disposed between said chambers and said source and between said chambers and said reservoir to control fluid communication therebetween and responsive to increases and reductions of the load of said vehicle to establish said fluid communication between said chambers and said source and between said chambers and said reservoir, an accumulator including a casing having therein first and second hydraulic fluid chambers, a gas chamber defined therebetween and filled with pressurized gas, and first and second partition members separating said first and second hydraulic fluid chambers, respectively, from said gas chamber, said first and second hydraulic fluid chambers of said accumulator communicating respectively with said chambers of said first and second suspension struts, each of said partition members being responsive to the difference between the fluid pressures in said hydraulic fluid chambers of said accumulator to move toward one of said hydraulic fluid chambers of said accumulator in which one the fluid pressures is lower, valve means disposed between said chambers of said suspension struts and the corresponding hydraulic fluid chambers of said accumulator to control therebetween, and means operatively connected to said valve means and responsive to a horizontal component of force exerted on said vehicle to actuate said valve means to isolate said chambers of said suspension of said accumulator.
6. A system as claimed in claim 5, in which the first and second suspension struts operatively cooperate with the front right and left wheels of the vehicle, respectively.
7. A system as claimed in claim 5, in which the first and second suspension struts operatively cooperate with the rear right and left wheels of the vehicle, respectively.
8. A system as claimed in claim 5, in which the first and second suspension struts operatively cooperate with the left front and rear wheels of the vehicle, respectively.
9. A system as claimed in claim 5, in which the first and second suspension struts operatively cooperate with the right front and rear wheels of the vehiCle, respectively.
10. A hydropneumatic suspension system as claimed in claim 5, in which said accumulator further includes two biasing means for urging said partition members toward each other.
11. A hydropneumatic suspension system as claimed in claim 10, in which each of said partition members is a flexible diaphragm member deformably mounted in said casing.
12. A hydropneumatic suspension system as claimed in claim 10, in which said casing is a cylinder, and in which each of said partition members is a piston slidably mounted in said cylinder.
13. A hydropneumatic suspension system as claimed in claim 5, in which said gas chamber comprises first and second gas chambers spaced from and communicating with each other said casing comprises first and second casings spaced from and connected with each other, said first and second casings having therein said first hydraulic fluid chamber, gas chamber and partition member and said second hydraulic fluid chamber, gas chamber and partition member, respectively, said first and second partition members separating said first and second hydraulic fluid chambers from said first and second gas chambers, respectively.
14. A hydropneumatic suspension system as claimed in claim 13, in which each of said partition members is a flexible diaphragm member deformably mounted in the corresponding casing.
15. A hydropneumatic suspension system as claimed in claim 5, in which said valve means comprises a horizontal disposed value cylinder, an axially slidable valve spool within said valve cylinder, and two biasing means for urging said spool in opposite directions to resiliently hold the same in a neutral position, said valve cylinder having formed therein a first port communicating with said chamber of said first suspension strut, a second port communicating with said first hydraulic fluid chamber of said accumulator a third port communicating with said chamber of said second suspension strut, and a fourth port communicating with said second hydraulic fluid chamber of said accumulator, said spool having formed therein first and second annular grooves, said first and second annular grooves providing fluid communication between said first and second ports and between said third and fourth ports when said spool is held in said neutral position.
16. A hydropneumatic suspension system as claimed in claim 15, in which said means responsive to a horizontal component of force exerted on said vehicle comprises a lever pivotally mounted on said valve cylinder and operatively connected at one end thereof with said spool and a weight mounted on the other end of said lever.
17. A hydropneumatic suspension system as claimed in claim 5, further comprising second valve means integral with said first valve means and disposed between said levelling means and said source and between said levelling means and said reservoir to control fluid communication therebetween, said second valve means isolating said levelling means from said source and said reservoir when said first valve means is actuated.
18. A hydropneumatic suspension system as claimed in claim 17, in which said integral first and second valve means comprises a horizontally disposed valve cylinder, an axially slidable valve spool within said valve cylinder, and two biasing means for urging said valve spool in opposite directions to resiliently hold the same in a neutral position, said valve cylinder having formed therein a first port communicating with said chamber of said first suspension strut, a second port communicating with said first hydraulic fluid chamber of said accumulator, a third port communicating with said chamber of said second suspension strut, a fourth port communicating with said second hydraulic fluid chamber of said accumulator, a fifth port communicating with said source, a sixth port communicating with an inlet of said levelling means, a seventh port communicating with said reservoir, and an eight port communicating with an outlet of said levelling means, saId spool having formed therein first, second, third and fourth annular grooves, said first and second annular grooves providing fluid communication between said first and second ports and between said third and fourth ports when said spool is held in said neutral position, said third and fourth annular grooves providing fluid communication between said fifth and sixth ports and between said seventh and eight ports when said spool is held in said neutral position.
19. A hydropneumatic suspension system as claimed in claim 18, in which said means responsive to a horizontal component of force exerted on said vehicle comprises a lever pivotally mounted on said valve cylinder and operatively connected at one end thereof with said spool and a weight mounted on the other end of said lever.
20. A hydropneumatic suspension system as claimed in claim 5, in which each of said suspension struts includes a cylinder connected to one of said vehicle body and said wheel supporting means, a piston slidably mounted in said cylinder and defining said chamber of said suspension strut therein, and a piston rod connected to said piston and to the other of said vehicle body and said wheel supporting means.
21. A hydropneumatic suspension system as claimed in claim 5, further comprising first and second hydropneumatic spring means each of which includes a casing and a flexible partition member dividing the interior of said casing into a gas chamber filled with pressurized gas and a hydraulic fluid chamber filled with pressurized fluid, said hydraulic fluid chambers of said hydropneumatic spring means communicating respectively with said chambers of said suspension struts.
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