RU-2026111183-A - HYDROPNEUMATIC SUSPENSION SYSTEM AND VEHICLE

Inventors

• ЧЭНЬ, Сяндун
• Дин, Хунган
• ЛЮ, Баолуань
• МА, Юньван
• ЮЙ, Чжунтай
• МА, Фэй
• ЧЗАН, Хэн
• ЧЖАО, Хуэйпэн

Assignees

• СЮЙЧЖОУ ХЕВИ МАШИНЕРИ КО., ЛТД.

Dates

Publication Date

20260507

Application Date

20231213

Priority Date

20231102

Claims (10)

1. 1. A hydropneumatic suspension system comprising an oil pump and an oil tank, which further comprises suspension hydraulic cylinders symmetrically arranged on both sides of an axle, a lifting switching valve, a lowering switching valve, an elastic stiffness switching valve and a general lift switching valve; P-ports of the lifting switching valve and the general lift switching valve are respectively connected to the pressure oil line of the hydropneumatic suspension system, wherein the other end of the lifting switching valve is connected to the rodless cavities of the suspension hydraulic cylinders; the other end of the general lift switching valve is connected to the rod cavities of the suspension hydraulic cylinders; the T-port of the lowering switching valve is connected to the oil tank, wherein the other end of the lowering switching valve is connected to the rodless cavities of the suspension hydraulic cylinders; the elastic stiffness switching valve is connected to the rodless cavities of the suspension hydraulic cylinders on one side and to the rod cavities of the suspension hydraulic cylinders on the opposite side; The lift changeover valve is used to close or open the hydraulic line between the rodless cavities of the suspension hydraulic cylinders and the oil pump. When power is supplied to the lift changeover valve, all suspension hydraulic cylinders on the same side are extended; the lowering changeover valve is used to close or open the hydraulic line between the rodless cavities of the suspension hydraulic cylinders and the oil tank. When power is supplied to the lowering changeover valve, all suspension hydraulic cylinders on the same side are retracted. When power is supplied to the lift or lowering changeover valves on both sides of the body at the same time, it is possible to simultaneously raise or lower the body.
2. 2. The hydropneumatic suspension system according to claim 1, characterized in that it additionally includes 2 through changeover valves symmetrically located on both sides of the bridge; suspension hydraulic cylinders of the lifting/lowering bridges and suspension hydraulic cylinders of the non-lifting/non-lowering bridges; the suspension hydraulic cylinders of the lifting/lowering bridges allow the corresponding bridges to be raised and lowered when the corresponding suspension hydraulic cylinders of the non-lifting/non-lowering bridges are in a stationary position; the through changeover valves are installed in the line connecting the rodless cavities of the suspension hydraulic cylinders of the lifting/lowering bridges and the rodless cavities of the suspension hydraulic cylinders of the non-lifting/non-lowering bridges, and are intended to lock the rodless cavities of the suspension hydraulic cylinders of the non-lifting/non-lowering bridges.
3. 3. A hydropneumatic suspension system comprising an oil pump and an oil tank, which further comprises suspension hydraulic cylinders symmetrically arranged on both sides of an axle, a lifting switching valve, a lowering switching valve, an elastic stiffness switching valve, a lifting/lowering switching valve and a hydraulic one-way valve; P-ports of the lifting switching valve and the lifting/lowering switching valve are respectively connected to the pressure oil line of the hydropneumatic suspension system, wherein the other end of the lifting switching valve is connected to the rodless cavities of the suspension hydraulic cylinders; T-port of the lowering switching valve is connected to the oil tank, wherein the other end of the lowering switching valve is connected to the rodless cavities of the suspension hydraulic cylinders; the elastic stiffness switching valve is connected to the rodless cavities of the suspension hydraulic cylinders on one side and to the rod cavities of the suspension hydraulic cylinders on the opposite side; The T-port of the lifting/lowering changeover valve is connected to the oil tank; there are 2 hydraulic one-way valves installed in parallel, and after the parallel installation, the 2 hydraulic one-way valves are connected in series between the rod cavities of each suspension hydraulic cylinder and the lifting/lowering changeover valve; the lifting changeover valve is used to close or open the line between the rodless cavities of the suspension hydraulic cylinders and the oil pump; when power is supplied to the lifting changeover valve, all suspension hydraulic cylinders on the same side are extended; the lowering changeover valve is used to close or open the line between the rodless cavities of the suspension hydraulic cylinders and the oil tank; when power is supplied to the lowering changeover valve, all suspension hydraulic cylinders on the same side are retracted; when power is supplied to the lifting changeover valves or the lowering changeover valves on both sides at the same time, it is possible to simultaneously raise or lower the body.
4. 4. The hydropneumatic suspension system according to claim 3, characterized in that it additionally includes 2 through-changeover valves symmetrically located on both sides of the bridge; suspension hydraulic cylinders of the lifting/lowering bridges and suspension hydraulic cylinders of the non-lifting/non-lowering bridges; the suspension hydraulic cylinders of the lifting/lowering bridges allow the corresponding bridges to be raised and lowered when the corresponding suspension hydraulic cylinders of the non-lifting/non-lowering bridges are in a stationary position; the through-changeover valves are installed in the line connecting the rodless cavities of the suspension hydraulic cylinders of the lifting/lowering bridges and the rodless cavities of the suspension hydraulic cylinders of the non-lifting/non-lowering bridges, and are intended to lock the rodless cavities of the suspension hydraulic cylinders of the non-lifting/non-lowering bridges.
5. 5. A hydropneumatic suspension system according to claim 1 or 3, characterized in that it further includes a first bypass valve, wherein the oil inlet of the first bypass valve is connected to the oil outlet of the oil pump, and the oil outlet is connected to the oil tank, to stabilize the pressure in the hydropneumatic suspension system.
6. 6. A hydropneumatic suspension system according to claim 1 or 3, characterized in that it further includes 2 second bypass valves, symmetrically located on both sides of the bridge, wherein on each side the second bypass valve is installed between the T-port of the drop-down switching valve of that side and the corresponding accumulator, to provide protection against overflow in the liquid cavity of the accumulator of that side.
7. 7. A hydropneumatic suspension system according to paragraph 1 or 3, characterized in that it additionally includes 2 accumulators, symmetrically located on both sides of the bridge, wherein each accumulator is constantly connected to the piston rod cavity of the suspension hydraulic cylinder on the opposite side to absorb vibrations transmitted by the road surface to the suspension system, to mitigate hydraulic shocks, and also to maintain pressure and keep the bridge in a raised state after it is lifted off the ground.
8. 8. A hydropneumatic suspension system according to paragraph 2 or 4, characterized in that the through-changeover valve is designed as a two-position, two-line changeover valve with one-way locking in the de-energized state.
9. 9. A hydropneumatic suspension system according to paragraph 1 or 3, characterized in that the lifting switching valve and the lowering switching valve are designed as two-position two-line electromagnetic switching valves with one-way or two-way locking, and the elastic stiffness switching valve is designed as a two-position two-line switching valve with pneumatic control and two-way locking.
10. 10. A vehicle characterized in that it includes a hydropneumatic suspension system according to any one of paragraphs 1-4.