CA2215340A1 - Hydraulic liftgate for a motor vehicle - Google Patents
Hydraulic liftgate for a motor vehicleInfo
- Publication number
- CA2215340A1 CA2215340A1 CA002215340A CA2215340A CA2215340A1 CA 2215340 A1 CA2215340 A1 CA 2215340A1 CA 002215340 A CA002215340 A CA 002215340A CA 2215340 A CA2215340 A CA 2215340A CA 2215340 A1 CA2215340 A1 CA 2215340A1
- Authority
- CA
- Canada
- Prior art keywords
- closure
- opening
- energy
- hydraulic
- actuator
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000004146 energy storage Methods 0.000 abstract 3
- 238000001514 detection method Methods 0.000 abstract 2
- 239000012530 fluid Substances 0.000 abstract 2
- 230000002452 interceptive effect Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
- 238000012544 monitoring process Methods 0.000 abstract 1
Landscapes
- Power-Operated Mechanisms For Wings (AREA)
- Actuator (AREA)
Abstract
A hydraulic closure system and method is disclosed for a motor vehicle (10) that enables automatic opening and closing, as well as manual closing, of a closure (16) pivotally mounted to an opening frame (14) defining a closure opening in the motor vehicle. The system includes at least one hydraulic actuator assembly (20) attached at opposite ends thereof to the closure (16) and the opening frame (14), respectively. A
motorized hydraulic pump (32) inputs energy to the actuator (20) by creating hydraulic fluid flow with respect to the actuator to move the closure (16) from the opened position to the closed position, and a biased energy storage system (140) inputs energy to the actuator (20) to move the closure (16) from the closed position to the opened position. In a preferred embodiment, the pump (32) is activated by manually generated movement of the closure (16) from the opened position toward the closed position for a prescribed distance in more than a prescribed time. Also disclosed is an obstacle detection mechanism (110) which detects obstacles interfering with closing of the closure based on monitored pressure in the system caused by the pump created fluid flow. A
level detection (210) and compensation feature adjusts the amount of energy stored in the biased energy storage system (140) for opening the closure (16) based on the detected inclination or declination of the vehicle (10) so that the amount of energy stored is commensurate with the amount required to open the closure (16). An energy monitoring and control system (156) maintains the amount of energy stored in the biased energy storage system (140) for opening the closure (16) within a predetermined range.
motorized hydraulic pump (32) inputs energy to the actuator (20) by creating hydraulic fluid flow with respect to the actuator to move the closure (16) from the opened position to the closed position, and a biased energy storage system (140) inputs energy to the actuator (20) to move the closure (16) from the closed position to the opened position. In a preferred embodiment, the pump (32) is activated by manually generated movement of the closure (16) from the opened position toward the closed position for a prescribed distance in more than a prescribed time. Also disclosed is an obstacle detection mechanism (110) which detects obstacles interfering with closing of the closure based on monitored pressure in the system caused by the pump created fluid flow. A
level detection (210) and compensation feature adjusts the amount of energy stored in the biased energy storage system (140) for opening the closure (16) based on the detected inclination or declination of the vehicle (10) so that the amount of energy stored is commensurate with the amount required to open the closure (16). An energy monitoring and control system (156) maintains the amount of energy stored in the biased energy storage system (140) for opening the closure (16) within a predetermined range.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US493995P | 1995-10-06 | 1995-10-06 | |
| US60/004,939 | 1995-10-06 | ||
| PCT/IB1996/001125 WO1997013948A1 (en) | 1995-10-06 | 1996-10-04 | Hydraulic closure system for a motor vehicle and method for operating same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2215340A1 true CA2215340A1 (en) | 1997-04-17 |
| CA2215340C CA2215340C (en) | 2006-02-14 |
Family
ID=35892315
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2215340 Expired - Lifetime CA2215340C (en) | 1995-10-06 | 1996-10-04 | Hydraulic liftgate for a motor vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2215340C (en) |
-
1996
- 1996-10-04 CA CA 2215340 patent/CA2215340C/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| CA2215340C (en) | 2006-02-14 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKEX | Expiry |
Effective date: 20161004 |