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Component Development
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Variable-speed fan drives.
·
Noise control associated with large-diameter fans.
·
Variable-speed electric pumps.
·
Electrically driven variable-speed compressors.
·
Alternate fan types (radial, centrifugal, mixed flow, dual systems).
·
More compact and lighter-weight heat exchangers.
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Shaped (e.g., curved) heat exchangers.
·
EGR heat exchangers.
System Design and Architectures
·
Heat exchanger "packaging," e.g., side-by-side and radiator-in-front-of-
condenser.
condenser.
·
Compact cooling system based on radial fan.
·
Separate cooling systems for EGR and engine.
·
Heat exchanger package divorced from front of the truck and made smaller.
·
Selective cooling.
·
Control strategies/technologies.
Sensors and Control Components Development
·
More reliable and accurate sensors.
·
Electronic thermostat.