Integrated engine/compressor control for gas transmission compressors
First Claim
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1. A method of controlling an internal combustion engine that drives a reciprocating gas compressor having multiple cylinders, comprising:
- receiving compressor operating values, the compressor operating values being at least values representing the load for each cylinder, the compressor suction pressure, and the compressor discharge pressure; and
calculating engine control values, based on the compressor operating values;
wherein the calculating step is performed using an algorithm that receives input to determine whether the loads among the cylinders are balanced, and if not, compensates the engine control value for unevenly distributed cylinder loads.
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Abstract
A method and system for controlling an engine that drives a reciprocating compressor, such as the large compressors used for natural gas transmission. A controller receives data from the compressor representing operation conditions, such as load step, suction pressure, and discharge pressure. The controller then calculates engine control parameters, such as air intake and spark timing, based on the compressor data to optimize engine performance and emissions.
41 Citations
32 Claims
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1. A method of controlling an internal combustion engine that drives a reciprocating gas compressor having multiple cylinders, comprising:
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receiving compressor operating values, the compressor operating values being at least values representing the load for each cylinder, the compressor suction pressure, and the compressor discharge pressure; and calculating engine control values, based on the compressor operating values; wherein the calculating step is performed using an algorithm that receives input to determine whether the loads among the cylinders are balanced, and if not, compensates the engine control value for unevenly distributed cylinder loads. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 30, 31, 32)
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10. A method of controlling an internal combustion engine that drives a reciprocating gas compressor having multiple cylinders, comprising:
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receiving compressor operating values, the compressor operating values being at least values representing the load for each cylinder, the compressor suction pressure, and the compressor discharge pressure; receiving at least one engine operating value from the group of;
engine speed, intake manifold air pressure, intake manifold air temperature, engine temperature, exhaust back pressure, pre-turbine pressure, exhaust gas composition, air flow, fuel flow, and ignition system energy; andcalculating engine control values, based on the compressor operating values; wherein the calculating step is performed using an algorithm that receives input to determine whether the loads among the cylinders are balanced, and if not, compensates the engine control value for unevenly distributed cylinder loads. - View Dependent Claims (26, 27, 28, 29)
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11. A controller for controlling an internal combustion engine that drives a reciprocating gas compressor having multiple cylinders, comprising:
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circuitry for receiving compressor operating values, the compressor operating values being at least values representing the load for each cylinder, the compressor suction pressure, and the compressor discharge pressure; and circuitry for calculating engine control value, based on the compressor operating values; wherein the calculating step is performed using an algorithm that receives input to determine whether the loads among the cylinders are balanced, and if not, compensates the engine control value for unevenly distributed cylinder loads.
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Specification