HVAC Pulse Count Technology

Visteon's HVAC pulse count technology is used to detect and control HVAC actuator position, based on direct current (DC) motor commutation pulses.

The system uses Visteon-patented control algorithms and ASIC to control the DC motor actuators via the power and ground wires only, eliminating the traditional feedback wire harness and position sensors.

Benefits

• Reduces overall climate system cost:
• Reduces vehicle wiring complexity and cost
• Reduces HVAC module cost
• Minimal increase to climate control cost
• Reduces weight from wiring
• Provides equal or better climate system performance
• Improves pulse count positioning resolution < 1 deg. possible, based on HVAC design
• Improves speed of door/flap movement
• Conforms to EMC requirements; compliant with CISPR-25
• Seamless change to end consumer
• Increases system robustness by deleting feedback loop for each actuator