METHOD OF VERIFYING COMPONENT FUNCTIONALITY ON EGR & AIR SYSTEMS
First Claim
1. A method for operating an electronically controlled internal combustion engine in a vehicle to perform at least one rationality check on at least one sensor to detect impending sensor failure and verify component functionality;
- said engine equipped with an engine control system (ECS) having a memory;
said ECS in electronic communication with various sensors;
said sensors transmitting data signals to said ECS indicative of associated engine and vehicle component functionality;
said engine equipped with a coolant system, EGR valve in fluid communication with a manifold having an inlet and an outlet and a turbocharger;
said method comprising;
determining engine/vehicle/powertrain operating conditions in which the specified component information from sensor data signals indicative of first and second component functionality;
determining the measured values of a first and second component from sensor data signals indicative of first and second component functionality;
comparing said measured value of said first component to said measured value of said second component to determine whether sensor readings from said first and second components are indicative of a component operating within a normal range or indicative of a component or system failure based on an irrational measured values for some of the parametric information that has been evaluated;
logging an indication of an impending sensor or component failure as a fault in MPU memory if it occurs for a predetermined period of time, occurs more than a predetermined number of times and drive cycles; and
activating a warning alert to an operator and initiating remedial actions responsive to said indication of impending component or sensor failure.
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Accused Products
Abstract
In one aspect, the present invention is directed to a method for operating an electronically controlled internal combustion engine in a vehicle to perform at least one rationality check on at least one sensor to detect impending sensor failure and verify component functionality. The engine is equipped with an engine control system (ECS) having a memory and in electronic communication with various sensors. The sensors transmit data signals to the ECS indicative of associated engine and vehicle component functionality. The method comprises determining a measured operating condition of a first component from sensor data signals indicative of first component functionality, determining a measured operating condition of a second component from sensor data signals indicative of second component functionality, comparing the measured condition of the first component to the measured operating condition of the second component to determine whether sensor readings from the first component are indicative of a component operating within a normal range but indicative of impending sensor or component failure, logging an indication of an impending sensor or component failure as a fault in MPU memory if it occurs for a predetermined period of time and for more than a predetermined number of times and drive cycles, and activating a warning alert to an operator and initiating remedial actions responsive to the indication of impending component or sensor failure. The data logged includes time of fault, type of fault, number of occurrences of the fault, number of drive cycles where the fault occurred and distance traveled with the fault logged.
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Citations
58 Claims
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1. A method for operating an electronically controlled internal combustion engine in a vehicle to perform at least one rationality check on at least one sensor to detect impending sensor failure and verify component functionality;
- said engine equipped with an engine control system (ECS) having a memory;
said ECS in electronic communication with various sensors;
said sensors transmitting data signals to said ECS indicative of associated engine and vehicle component functionality;
said engine equipped with a coolant system, EGR valve in fluid communication with a manifold having an inlet and an outlet and a turbocharger;
said method comprising;determining engine/vehicle/powertrain operating conditions in which the specified component information from sensor data signals indicative of first and second component functionality; determining the measured values of a first and second component from sensor data signals indicative of first and second component functionality; comparing said measured value of said first component to said measured value of said second component to determine whether sensor readings from said first and second components are indicative of a component operating within a normal range or indicative of a component or system failure based on an irrational measured values for some of the parametric information that has been evaluated; logging an indication of an impending sensor or component failure as a fault in MPU memory if it occurs for a predetermined period of time, occurs more than a predetermined number of times and drive cycles; and activating a warning alert to an operator and initiating remedial actions responsive to said indication of impending component or sensor failure. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58)
- said engine equipped with an engine control system (ECS) having a memory;
Specification