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    • 9. 发明申请
    • VEHICLE HEATING APPLIANCE WITH OVERHEATING CHECKING DEVICE
    • 具有过热监测装置汽车加热器
    • WO1995018023A1
    • 1995-07-06
    • PCT/EP1994004307
    • 1994-12-27
    • FIRMA J. EBERSPÄCHERBURNER, ErwinEPPLE, JürgenHUMBURG, MichaelKOCH, Johannes
    • FIRMA J. EBERSPÄCHER
    • B60H01/22
    • B60H1/2206B60H2001/2231B60H2001/2256F23N5/242F23N2023/08F23N2023/14F23N2025/08F23N2035/30F23N2041/14G05D23/1931G05D23/24
    • In a vehicle heating appliance, an overheated state is detected by an overheating temperature sensor by means of a microprocessor (30). The overheating temperature sensor supplies a signal (UFT) to the microprocessor, and when the signal (UFT) exceeds a threshold value, the microprocessor blocks the transmission of driving signals to a driving transistor (Tr) for the fuel dosing pump (6). A circuit (36) connected in parallel to the microprocessor (30) with a threshold value switch (38) acts as a redundant switching-off device. The output signal of the threshold value switch (38) is applied to an AND-gate (40) whose output is connected to the base of the driving transistor (Tr) and whose other input receives the driving signals from the microprocessor (30). When the signal UFT exceeds the threshold value of the threshold value switch (38), the AND-gate (40) blocks all signal transmission from the microprocessor (30) to the driving transistor (Tr), so that the fuel dosing pump (6) is stopped. The danger of overheating is detected in that the signal supplied by the overheating temperature sensor exceeds an overheating temperature threshold value. Preferably the microprocessor calculates a differential value from the signal supplied by the overheating temperature sensor and from an output signal supplied by a temperature sensor of the heat transfer medium. This differential value is compared with a threshold differential value in order to stop the fuel dosing pump if the calculated differential value exceeds the threshold differential value. Instead of stopping the fuel dosing pump, it may be enough to reduce the power of the burner in order to avoid the danger of possible overheating.
    • 在车辆加热器的过热状态通过用微处理器(30)的辅助的过热温度传感器检测。 过热温度传感器提供的信号(UEFT)到微处理器,并且当信号(UEFT)超过阈值,则微处理器禁止驱动信号到驱动晶体管(TR)的燃料供给泵(6)供给。 作为冗余关闭装置是一个以微处理器(30)并联连接的电路(36)与阈值开关(38),其输出信号输出到与门(40)被放置,驱动器晶体管的基极的输出端(TR)连接, 和从微处理器(30)的驱动信号的另一输入端被提供。 超过信号UEFT阈值开关(38)的阈值,与门(40)阻挡来自微处理器(30)到所述驱动晶体管(TR)的信号的任何供应,使所述燃料供给泵(6)停止。 当检测到过热的威胁,通过过热温度传感器提供的信号超过过热温度阈值。 从由过热温度传感器,并通过热载体温度传感器优选的微处理器提供的输出信号,并且该差值形成与差异阈值相比较,以便当所形成的差值超过差值阈值,以停止燃料供给泵的差值 , 取而代之的是燃油计量泵关闭,它也可以是足以关闭燃烧器电源,以避免可能的过热的危险。