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US 7,055,486 B2Granted
Fluid delivery control system
AssigneeCaterpillar Inc.
InventorsBrian D. Hoff, Kris William Johnson, Marcelo C. Algrain, Sivaprasad Akasam
Life of this patent
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Abstract
A method of controlling the delivery of fluid to an engine includes receiving a fuel flow rate signal. An electric pump is arranged to deliver fluid to the engine. The speed of the electric pump is controlled based on the fuel flow rate signal.
Claims16
A method of controlling the delivery of fluid to an engine, comprising:
- receiving a fuel flow rate signal;
- and
- controlling the speed of an electric pump arranged to deliver fluid to the engine based on a first pump speed signal and a second pump speed signal, wherein the first pump speed siqnal is based on the fuel flow rate signal and a sensed engine speed, and wherein the second pump speed signal is based on a sensed oil pressure.
An electric pump control system for controlling delivery of fluid to an engine, comprising:
- a pump arranged to pump fluid to an engine;
- an electric motor arranged to drive the pump;
- a controller operatively coupled to the electric motor, the controller determining engine torque based on a fuel flow rate signal and controlling the speed of the electric motor based on engine torque;
- an engine speed sensor operatively coupled to the controller;
- and
- an oil pressure sensor operatively coupled to the controller, wherein the controller generates a first pump speed signal based on a signal received from the oil pressure sensor and a signal received from the engine speed sensor, the controller generates a second pump speed signal based on fuel flow rate signal, and controlling the speed of the electric motor is in response to the first and second pump speed signals.
3 more elements
Dependencies are inferred from the claim text.