Method for reducing vapor generation in a temperature controlled

Details Method for reducing vapor generation in a temperature controlled Method for reducing vapor generation in a temperature controlled

1996-09-27

1998-12-22

Lazarus, Ira S.

Heat exchange

With timer, programmer, time delay, or condition responsive...

Having heating and cooling capability

165 481, 165 41, 123 4112, 236 13, 219497, F25B 2900, F28F 100

Patent

active

058508732

ABSTRACT:
A method is provided for reducing vapor generation in a temperature controlled fuel tank in a motor vehicle. The method cooperates with an apparatus having hot and cold fluid sources (20, 22), a heat exchanger (18) having hot and cold valves (26, 24) and an air blower (28) to force temperature conditioned discharge air flow onto a fuel tank (12). The method involves comparing actual and desired fuel temperature signals and producing a first error signal from the comparison. The method then produces a gain signal in response to an operating mode signal and the error signal. A first control signal is then generated in response to the first error signal representing the difference between a desired fuel temperature and the actual fuel temperature. Finally, the heat exchanger is actuated by supplying the first control signal to the cold and hot valves.

REFERENCES:
patent: 4362924 (1982-12-01), Story
patent: 4689967 (1987-09-01), Han et al.
patent: 4775941 (1988-10-01), Gardner et al.
patent: 5053605 (1991-10-01), Thorax
patent: 5369976 (1994-12-01), Ratton
patent: 5441099 (1995-08-01), Yasso
patent: 5526675 (1996-06-01), Ratton
Environmental Protection Agency, Part III, Federal Register, Wednesday, Aug. 23, 1995, vol. 60, No. 163, pp. 43880-43907.

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