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US 10,421,447 B2Granted
Electrically-driven pressure regulator and volume-delivery unit
AssigneeIpgate AG
InventorsHeinz Leiber, Thomas Leiber, Valentin Unterfrauner
Life of this patent
Estimating the term…
Abstract
The invention relates to a pressure-volume delivery system comprising a piston-cylinder unit with a piston acting on both sides (dual-action reciprocating piston), said piston having at least two different active surfaces in corresponding pressure chambers and the pressure chambers being connected to at least one consumer via hydraulic lines. The delivery system also comprises a drive for the piston-cylinder unit. According to the invention, the pressure chambers and/or hydraulic lines are interconnected by means of at least one or more switching valves connected in parallel and having a large flow cross-section (AV) and via a short hydraulic line or lines with low flow resistance.
Claims24
A pressure-volume delivery system comprising:
- a piston-cylinder unit with a piston acting on both sides, said piston having at least two active surfaces of different sizes, and wherein each active surface of the piston is associated with a respective pressure chamber of the piston, wherein the pressure chambers of the piston are connected via hydraulic lines with at least one consumer, and the piston-cylinder unit also including a drive coupled to the piston and configured to drive the piston in a reciprocating manner, and
- a connecting line configured to connect the pressure chambers and/or the hydraulic lines, the connecting line having a short design and a sufficiently low flow resistance so as not to throttle flow, wherein the connecting line is configured with one or more switching valves, wherein in the case of multiple switching valves, the multiple switching valves are connected in parallel with each other, the one or more switching valves having a sufficiently large cross-flow section so as not to throttle flow when the one or more switching valves is/are open,
- wherein:
- (a) the different sized active surfaces of the piston are in a ratio of between 1.5 and 1 to between 2.5 and 1, to each other,
- and/or
- (b) delivery capacity/pressure build-up of the piston-cylinder-unit is enabled to be varied by means of the switchable valve by varying switchable active surfaces in the forward stroke and the delivery unit being operated in forward and return strokes.
3 more elements
A pressure-volume delivery system comprising:
- a piston-cylinder unit with a piston acting on both sides, said piston having at least two active surfaces of different sizes, and wherein each active surface of the piston is associated with a respective pressure chamber of the piston, wherein the pressure chambers of the piston are connected via hydraulic lines with at least one consumer and with a drive for the piston-cylinder unit, and
- a connecting line configured to connect the pressure chambers and/or the hydraulic lines, the connecting line having a short design and a sufficiently low flow resistance so as not to throttle flow, wherein the connecting line is configured with one or more switching valves, wherein in the case of multiple switching valves, the multiple switching valves are connected in parallel with each other, the one or more switching valves having a sufficiently large cross-flow section so as not to throttle flow when the one or more switching valves is/are open, wherein delivery capacity/pressure build-up of the piston-cylinder-unit is enabled to be varied by means of the switchable valve by varying switchable active surfaces in the forward stroke and the delivery unit being operated in forward and return strokes.
An activation system for a motor vehicle brake, the activation system comprising:
- an activation device,
- a piston-cylinder unit with a piston acting on both sides, said piston having at least two active surfaces of different sizes, and wherein each active surface of the piston is associated with a respective pressure chamber of the piston, wherein the pressure chambers of the piston are connected via hydraulic lines with a hydraulic brake circuit, to provide compressant to and pressurize the hydraulic brake circuit, and also including a drive coupled to the piston and configured to drive the piston in a reciprocating manner, and
- a connecting line configured to connect the pressure chambers and/or the hydraulic lines, the connecting line having a short design and a sufficiently low flow resistance so as not to throttle flow, wherein the connecting line is configured with one or more switching valves, wherein in the case of multiple switching valves, the multiple switching valves are connected in parallel with each other, the one or more switching valves having a sufficiently large cross-flow section so as not to throttle flow when the one or more switching valves is/are open,
- wherein:
- (a) the different sized active surfaces of the piston are in a ratio of between 1.5 and 1 to between 2.5 and 1, to each other,
- and/or
- (b) delivery capacity/pressure build-up of the piston-cylinder-unit is enabled to be varied by means of the switchable valve by varying switchable active surfaces in the forward stroke and the delivery unit being operated in forward and return strokes.
4 more elements
Dependencies are inferred from the claim text.