| 摘要 |
PCT No. PCT/DE94/00735 Sec. 371 Date Aug. 17, 1995 Sec. 102(e) Date Aug. 17, 1995 PCT Filed Jun. 23, 1994 PCT Pub. No. WO95/03187 PCT Pub. Date Feb. 2, 1995The invention relates to a vehicle heater with two circuits. One circuit leads from the vehicle's engine via a heating device and a heat exchanger back to the engine. The other circuit leads from the heating device via the heat exchanger back to the heating device. These two circuits may be automatically switched by a single valve, a two-way valve structurally combined with a check valve, so that no auxiliary power, e.g. current from the vehicle battery, is needed.
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