Systems and methods for controlling coolant and fuel enrichment
AssigneeGM Global Technology Operations LLC
InventorsRichard J. Lopez, Michael A. Smith, Eugene V. Gonze, David E. Edwards, Michael J. Paratore, Jr.
Life of this patent
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Abstract
An engine control system for an engine includes: a pump control module configured to control a coolant pump; a block control module configured to control opening of a block valve; a fuel control module configured to control fueling of the engine; a coolant control module configured to control a position of a coolant valve; and an adjustment module configured to, when the coolant pump is pumping, the block valve is open, and the coolant valve is positioned such that an input is connected to an output, adjust the fueling of the engine such that fueling of the engine is fuel rich.
Claims19
An engine control system for an engine, comprising:
- a pump control module configured to control application of power to an electric coolant pump based on a target speed;
- a block control module configured to control opening of a block valve, wherein the block valve is configured to block coolant flow through a block portion of the engine when the block valve is closed and to allow coolant flow through the block portion of the engine when the block valve is open;
- a fuel control module configured to control fueling of the engine;
- a coolant control module configured to control a position of a coolant valve, wherein the coolant valve has a first input that receives coolant after the coolant flows through the engine, a second input that receives coolant directly from the electric coolant pump, and an output that is connected to at least one of an engine oil heat exchanger and a transmission oil heat exchanger;
- and
- an adjustment module configured to, in response to the target speed of the electric coolant pump being set to a predetermined maximum speed, the block valve being open and the coolant valve being positioned such that the second input is connected to the output, adjust the fueling of the engine such that fueling of the engine is fuel rich.
An engine control method for an engine, comprising:
- controlling application of power to an electric coolant pump based on a target speed;
- controlling opening of a block valve, wherein the block valve is configured to block coolant flow through a block portion of the engine when the block valve is closed and to allow coolant flow through the block portion of the engine when the block valve is open;
- controlling fueling of the engine;
- controlling a position of a coolant valve, wherein the coolant valve has a first input that receives coolant after the coolant flows through the engine, a second input that receives coolant directly from the electric coolant pump, and an output that is connected to at least one of an engine oil heat exchanger and a transmission oil heat exchanger;
- and
- in response to the target speed of the electric coolant pump being set to a predetermined maximum speed, the block valve being open, and the coolant valve being positioned such that the second input is connected to the output, adjusting the fueling of the engine such that fueling of the engine is fuel rich.
Dependencies are inferred from the claim text.