RELATION BETWEEN THE DEFOGGING AREA AND POWER LEVEL FOR ELECTRICALLY HEATED REAR WINDOW OF AUTOMOBILE

A two-dimensional heat conduction model is developed in order to estimate the power requirement for electrically heated backlight. The calculations show a fairly good agreement with the experiments in a test chamber, which indicates that the model is useful for the design of power requirement. On the basis of numerical calculations, it is determined that a power level of 400 w/sq.m is adequate under common environmental conditions, and 550 w/sq.m sufficient for severe conditions. Moreover, the model is applied to the automatic defogging system with a humidity sensor, and the optimum position of the sensor and its sensing level of humidity are determined. /Author/TRRL/

• Corporate Authors:

  International Federation of Auto Techniques Engs

  3 Avenue du President Wilson
  F 75116 Paris,   France 
• Authors:
  • Mizushima, E
  • Ohsato, N
  • Tanaka, K
• Publication Date: 0

Language

• English

Media Info

• Pagination: 1 p.

Subject/Index Terms

• TRT Terms: Automatic control; Automobiles; Conferences; Defoggers; Demand; Electricity; Heat; Humidity control; Mathematical models; Mist; Moisture content; Sensors; Vehicle rear end; Windows (Vehicles)
• Uncontrolled Terms: Models; Rear; Use
• Old TRIS Terms: Windows
• ITRD Terms: 8525: Conference; 285: Demand (econ); 6954: Electricity; 2547: Fog; 6743: Heat; 6473: Mathematical model; 5920: Moisture content; 9067: Rear; 6120: Sensor; 9084: Use; 1311: Windscreen (veh)
• Subject Areas: Highways; Safety and Human Factors; Vehicles and Equipment; I91: Vehicle Design and Safety;

Filing Info

• Accession Number: 00163330
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Report/Paper Numbers: Analytic
• Files: ITRD, TRIS
• Created Date: Apr 12 1978 12:00AM