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    • 4. 发明专利
    • ABNORMAL CONDITION DETECTING ALARM DEVICE IN ENGINE SEA WATER PUMP SYSTEM FOR SHIP
    • JPH0726953A
    • 1995-01-27
    • JP16529693
    • 1993-07-05
    • NISSAN DIESEL MOTOR CO
    • NABE YUICHIRO
    • F01P3/20F01P5/14F02B61/04F02B77/08
    • PURPOSE:To detect abnormal condition in a sea water pump system from the map of pressure in relation to the signal of a pressure sensor and the rotational, speed of an engine provided beforehand so as to announce an alarm by providing respective sensors for detecting pressures in the inlet and the outlet of the sea water pump and the rotational speed of the engine. CONSTITUTION:A heat exchanger 6 is provided on an engine 7, and connected to the discharge side circuit 4 of a sea water pump 11, and a sea water circuit 6a is provided so as to discharge exhaust gas from the sea water circuit 6a toward an outboard through the water jacket 7a of an exhaust pipe. An intake side pressure sensor 3 is provided in the intake circuit 2 of the sea water pump 11, and a discharge side pressure sensor 5 is provided in a discharge side circuit 4, and they are connected to an abnormal condition detecting alarm device 8 together with an engine rotational speed sensor 12. A rotational speed signal calculated from the signal of the rotational speed sensor 12 is comparing-calculated with a signal from the discharging side pressure sensor 5 and a signal from the intake side pressure sensor 3, and it is judged that its calculated value is in either one zone of a map which is set beforehand or not. Failure is judged on the basis of a reference value, and an alarm is announced by means of a buzzer while displaying failure content on a failure content indicator panel.
    • 10. 发明专利
    • Engine cooling device for vehicle
    • 发动机冷却装置
    • JPS6189918A
    • 1986-05-08
    • JP21033884
    • 1984-10-09
    • Nissan Motor Co Ltd
    • NOSE TOSHIMITSU
    • F01P5/04F01P5/14F01P7/04F01P11/16H01H47/00
    • F01P5/14F01P7/048F01P11/16
    • PURPOSE:To prevent overheating of an engine due to failure of a fan control circuit, by controlling that the device does not turn the fan off until the temperature detection means detect engine temperature drop in an on-off control device controlling a cooling fan in response to the engine temperature. CONSTITUTION:A motor 27, which drives a fan of engine radiator, is connected to a relay 15 controlled by a thermal switch 1 which detects temperature of cooling water. Also, a relay 5, having a normally shut contact 9, is connected to the thermal switch 1, and the contact 9 is connected to the motor 27 through a diode 11. When the temperature of cooling water is high, the contact B of the thermal switch 1 shuts, the relay 15 shuts and the motor 27 is driven, and when the temperature is low, the contact A shuts and the motor is stopped. Since the relay 15 is self-maintained through the diode 11, the motor 27 is driven even if the switch 1 fails, and overheating of the engine is prevented.
    • 目的:为了防止由于风扇控制电路故障引起的发动机过热,通过控制装置在关闭控制冷却风扇的开关控制装置的温度检测装置检测到发动机温度下降之前,不关闭风扇, 到发动机温度。 构成:驱动发动机散热器的风扇的马达27连接到由检测冷却水的温度的热开关1控制的继电器15。 此外,具有常闭触点9的继电器5连接到热开关1,并且触点9通过二极管11连接到电动机27.当冷却水的温度高时, 热开关1关闭,继电器15闭合,马达27被驱动,当温度低时,触点A闭合,马达停止。 由于继电器15通过二极管11自维持,所以即使开关1故障也驱动马达27,防止发动机过热。