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US 8,992,184 B2Granted
Lubricant pump system
AssigneeMahle International GmbH
InventorRené Wagner
Life of this patent
Estimating the term…
Abstract
A lubricant pump system may include a lubricant pump controlled by a proportional valve. An actuating unit may be disposed in the lubricant pump and configured to control a delivery output of the lubricant pump. A first pressure chamber and at least one second pressure chamber may be configured to adjust the actuating unit against a spring, wherein the second pressure chamber is smaller than the first pressure chamber. In response to a failure of the proportional valve, the lubricant pump may be exclusively pressurized via the at least one second pressure chamber.
Claims9
A lubricant pump system comprising:
- a lubricant pump for supplying a combustion engine with lubricant, wherein the lubricant pump is controlled by a proportional valve, the proportional valve being in communication with at least one of the combustion engine at an input side and an output of the lubricant pump;
- an actuating unit arranged in the lubricant pump and preloaded by a spring, the actuating unit configured to control a delivery output of the lubricant pump;
- a first pressure chamber acting on the actuating unit and pressurized in a characteristic-map-controlled manner, the first pressure chamber configured to adjust the actuating unit against the spring, the spring connected upstream of the proportional valve;
- at least one second pressure chamber acting on the actuating unit and pressurized, the second pressure chamber configured to adjust the actuating unit against the spring;
- wherein the at least one second pressure chamber is smaller in volume than the first pressure chamber;
- wherein in response to a failure of the proportional valve the lubricant pump is exclusively pressurized via the at least one second pressure chamber, the second pressure chamber generates a higher lubricant pressure than that of the first pressure chamber;
- wherein the second pressure chamber includes at least two second pressure chambers interconnected in a communicating manner via a connecting channel, wherein the two second pressure chambers are smaller than the first pressure chamber.
4 more elements
A lubricant pump system comprising:
- a lubricant pump for supplying a combustion engine with lubricant,
- wherein the lubricant pump is controlled by a proportional valve, the proportional valve being in communication with at least one of the combustion engine at an input side and an output of the lubricant pump,
- an actuating unit arranged in the lubricant pump and preloaded by a spring, the actuating unit configured to control a delivery output of the lubricant pump,
- a first pressure chamber acting on the actuating unit and pressurized in a characteristic-map-controlled manner, the first pressure chamber configured to adjust the actuating unit against the spring, the spring connected upstream of the proportional valve,
- at least one second pressure chamber acting on the actuating unit and pressurized, the second pressure chamber configured to adjust the actuating unit against the spring,
- wherein the at least one second pressure chamber is smaller in volume than the first pressure chamber, and
- wherein in response to a failure of the proportional valve the lubricant pump is exclusively pressurized via the at least one second pressure chamber, the second pressure chamber generates a higher lubricant pressure than that of the first pressure chamber;
- wherein at least one of the first pressure chamber and the at least one second pressure chamber is connected in a communicating manner on at least one of the input side to the combustion engine and the output of the lubricant pump;
- wherein the at least one second pressure chamber includes at least two second pressure chambers interconnected in a communicating manner via a connecting channel, wherein the two second pressure chambers are smaller than the first pressure chamber.
6 more elements
Dependencies are inferred from the claim text.