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US 8,751,101 B2Granted
Diagnosing a cooling subsystem of an engine system in response to dynamic pressure sensed in the subsystem
AssigneeBorgWarner Inc.
InventorsOlaf Weber, Wolfgang Wenzel
Life of this patent
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Abstract
A method of diagnosing a cooling subsystem of an engine system in response a parameter extracted from dynamic hydraulic pressure sensed in the cooling subsystem, and products and systems using same.
Claims31
An engine system comprising:
- an internal combustion engine;
- an engine breathing system coupled to the engine, and including:
- an induction subsystem coupled to the engine upstream thereof;
- an exhaust subsystem coupled to the engine downstream thereof;
- a high-pressure (HP) exhaust gas recirculation (EGR) subsystem in communication across the exhaust and induction subsystems, and including a HP high-temperature (HT) EGR cooler;
- a turbocharger between the induction and exhaust subsystems and including a turbine in the exhaust subsystem and a compressor in the induction subsystem;
- and
- a low-pressure (LP) EGR subsystem in communication across the exhaust subsystem downstream of the turbine and upstream of the compressor, and including a LP HT EGR cooler;
- a cooling subsystem coupled to the engine to cool at least a portion of the engine and including:
- a plurality of hydraulic pressure sensing devices to sense dynamic hydraulic pressure;
- and
- a high-temperature (HT) cooling subsystem in fluid communication with the internal combustion engine and the engine breathing system, and including an HT radiator, an HT coolant pump, a thermostat valve, the HP and LP HT EGR coolers, an HT coolant valve;
- a LT cooling subsystem;
- and
- a control subsystem to extract a parameter from the sensed dynamic hydraulic pressure, and to evaluate the extracted parameter to diagnose a condition of the cooling subsystem;
- wherein said LT cooling subsystem is in fluid communication with the internal combustion engine and the engine breathing system, and includes an LT radiator, an LT coolant pump, an LP LT EGR cooler, an LT coolant valve, and said plurality of hydraulic pressure sensing devices.
13 more elements
An engine system comprising:
- an internal combustion engine;
- an engine breathing system coupled to the engine, and including an induction subsystem coupled to the engine upstream thereof, and an exhaust subsystem coupled to the engine downstream thereof;
- a high-pressure (HP) exhaust gas recirculation (EGR) subsystem in communication across the exhaust and induction subsystems, and including a HP high-temperature (HT) EGR cooler;
- a turbocharger between the induction and exhaust subsystems and including a turbine in the exhaust subsystem and a compressor in the induction subsystem;
- and
- a low-pressure (LP) EGR subsystem in communication across the exhaust subsystem downstream of the turbine and upstream of the compressor, and including a LP HT EGR cooler;
- a cooling subsystem coupled to the engine to cool at least a portion of the engine and including:
- a plurality of hydraulic pressure sensing devices to sense dynamic hydraulic pressure;
- and
- a high-temperature (HT) cooling subsystem in fluid communication with the internal combustion engine and the engine breathing system, and including an HT radiator, an HT coolant pump, a thermostat valve, the HP and LP HT EGR coolers, an HT coolant valve;
- a low-temperature (LT) cooling subsystem in fluid communication with the internal combustion engine and the engine breathing system, including an LT radiator, an LT coolant pump, an LP LT EGR cooler, and an LT coolant valve;
- and
- a control subsystem to extract a parameter from the sensed dynamic hydraulic pressure, and to evaluate the extracted parameter to diagnose a condition of the cooling subsystem.
10 more elements
An engine system comprising:
- an internal combustion engine;
- an engine breathing system coupled to the engine, and including:
- an induction subsystem coupled to the engine upstream thereof;
- an exhaust subsystem coupled to the engine downstream thereof;
- a high-pressure (HP) exhaust gas recirculation (EGR) subsystem in communication across the exhaust and induction subsystems, and including a HP high-temperature (HT) EGR cooler;
- a turbocharger between the induction and exhaust subsystems and including a turbine in the exhaust subsystem and a compressor in the induction subsystem;
- and
- a low-temperature (LP) EGR subsystem in communication across the exhaust subsystem downstream of the turbine and upstream of the compressor, and including a LP HT EGR cooler;
- a cooling subsystem coupled to the engine to cool at least a portion of the engine and including:
- a plurality of hydraulic pressure sensing devices to sense dynamic hydraulic pressure;
- and
- a high-temperature (HT) cooling subsystem in fluid communication with the internal combustion engine and the engine breathing system, and including an HT radiator, an HT coolant pump, a thermostat valve, the HP and LP HT EGR coolers, an HT coolant valve;
- a low-temperature (LT) cooling subsystem in fluid communication with the internal combustion engine and the engine breathing system, and including an LT radiator, an LT coolant pump, an LP LT EGR cooler, and an LT coolant valve;
- a control subsystem to extract a parameter from the sensed dynamic hydraulic pressure, and to evaluate the extracted parameter to diagnose a condition of the cooling subsystem;
- and
- said induction subsystem includes a charge air cooler (CAC), and wherein one of said plurality of hydraulic pressure sensing devices being located downstream of both the CAC and the LP LT EGR cooler, and upstream of the LT radiator.
13 more elements
The engine system of clutch 19 wherein the extracted parameter is at least one of acceleration, period, amplitude, frequency, wavelength, intensity, velocity, or direction.
Dependencies are inferred from the claim text.