Back to results
US 10,125,732 B1Granted
Hydromechanical fuel system with dual bypass
AssigneeEaton Intelligent Power Limited
InventorRobert J. Nyzen
Life of this patent
Estimating the term…
Abstract
A fuel system is provided that includes a boost stage, a positive displacement pump and a first bypass valve configured to bypass fuel to one of the boost stage and the positive displacement pump. A second bypass valve is configured to bypass fuel to the other of boost stage and the positive displacement pump.
Claims16
An engine fuel supply system, comprising:
- a boost stage;
- a positive displacement pump;
- a metering valve downstream of the positive displacement pump that receives flow therefrom;
- a first bypass valve configured to bypass fuel received from the positive displacement pump to one of the boost stage and the positive displacement pump, the first bypass valve operatively associated with the metering valve such that operation of the first bypass valve is responsive to upstream and downstream pressures across the metering valve;
- a second bypass valve configured to bypass fuel received from the positive displacement pump to the other of the boost stage and the positive displacement pump, the second bypass valve operatively associated with the metering valve such that operation of the second bypass valve is responsive to upstream and downstream pressures across the metering valve;
- a differential pressure regulator and wherein at least the first bypass valve is controlled by the differential pressure regulator;
- and
- wherein the first bypass valve and the second bypass valve operate independently of one another.
5 more elements
An engine fuel supply system comprising:
- a centrifugal pump boost stage;
- a positive displacement pump that receives flow from the boost stage;
- a metering valve downstream of the positive displacement pump that receives flow therefrom;
- a first bypass valve downstream of the positive displacement pump configured to bypass fuel received therefrom to one of the boost stage and the positive displacement pump in response to sensed differential pressure across the metering valve;
- a second bypass valve downstream of the positive displacement pump configured to bypass fuel received therefrom to the other of the boost stage and the positive displacement pump, the second bypass valve operatively associated with the metering valve such that operation of the second bypass valve is responsive to upstream and downstream pressures across the metering valve, wherein the second bypass valve receives flow from the positive displacement pump without passing through the first bypass valve;
- and
- a differential pressure regulator that senses the upstream and downstream pressures of the metering valve, and wherein the first bypass valve is controlled by the differential pressure regulator.
4 more elements
Dependencies are inferred from the claim text.