Abstract:
Bei einem Thermostatventil für eine Kühlanlage eines Verbrennungsmotors wird ein gemeinsames Kurzschlussventilelement (21) vorgesehen, das einen als Kurzschlussventilschieber (26) dienenden Abschnitt und einen in Ausfahrrichtung des thermostatischen Arbeitselementes (16) vorgeschalteten Kurzschlussventilteller (25) aufweist, zwischen denen ein gemeinsamer Ventilsitz vorgesehen ist, wobei in dem gemeinsamen Ventilsitz ein zur Mischkammer (15) hin öffnendes Überdruckventil (32) vorgesehen ist.
Abstract:
Die Erfindung betrifft ein Verfahren zur Temperaturregelung eines Motors, insbesondere eines Verbrennungsmotors 12, bei dem der Motor über wenigstens eine Vorlaufleitung 35 und wenigstens eine Rücklaufleitung 44 innerhalb eines Külkreislaufs 14 mit einem Kühler 16 verbunden ist, welcher seinerseits wiederum über eine ventilgeregelte Bypassleitung 48 zwischen der wenigstens einen Vorlaufleitung 35 und der wenigstens einen Rücklaufleitung 44 umgangen werden kann. Der Kühlkreislauf 14 weist zudem mindestens eine steuer und/oder regelbare Pumpe, insbesondere eine elektrische Pumpe 34 zur Umwälzung eines Kühlmittels durch die Verbindungsleitungen 32 Kühlkreislauf 14 sowie ein Steuergerät 52 auf, das die Kühlleistung des Kühlkreislaufs 14 steuert und/oder regelt. Erfindungsgemäss wird vorgeschlagen, mindestens eine Bauteiltemperatur des Motors 12 durch die Kühlmitteltemperatur und den Volumenstrom des Kühlmittels durch den Motor 12 zu bestimmen.
Abstract:
An engine control unit (24) is supplied with information on whether or not a cooling fan (12a) is operating, information on the temperature of the cooling water discharged from an engine (1), and other parameters representing the state of the operation of the engine. In the engine control unit (24), it is programmed in particular so as to read the extent of temperature drop of the cooling water caused in a radiator (2) out of a table-type map on the basis of the information representing the operating state of the cooling fan, thereby predicting the change of the coolant temperature and achieving the temperature control. It has become possible to operate the engine at high temperatures but not high enough to invite overheating, thereby improving the fuel consupmption and minimizing the generation of harmful exhaust gas.
Abstract:
An apparatus is provided for controlling the temperature of an engine (28) based on a temperature control signal (20) related to an optimum engine temperature generated by an electronic control module (10) using an output signal from at least one sensor (14). A controller (22) generates an output signal (26) based on a temperature control signal (20) received from the electronic control module (10) and on a signal (24) proportional to the actual engine temperature received from an engine temperature sensor (14). The apparatus also includes an electronically actuated thermostat (24) including a valve (46) located within a coolant flow passageway (40) of the engine block (38) and a motor (44) electrically coupled to the controller (22) for controlling the valve (46).
Abstract:
A layover heating system (89) for a locomotive is provided. The layover heating system (89) is adapted to be used in conjunction with conventional locomotive cooling systems. The layover heating system (89) includes a water tank and pump (90). A layover heater (92) heats fluid in the layover heating system (89). An orifice (98) is provided to control the flow of fluid in the layover system (89) to generally balance the pressure on either side of the locomotive radiator. In this manner, fluid flow through the radiator is minimized, minimizing heat loss at the radiator. A variable orifice may be used that is adjustable in response to a signal generated from pressure sensors on each side of the radiator and processed by a central processing unit.
Abstract:
The invention relates to a control valve (10) for a regulating circuit (30) with at least one first control unit (14). Said control unit releases, restricts the flow through or closes a channel (32) to a heat exchanger (16) depending on at least one operational parameter and/or the ambient temperature and complementarily controls a bypass pipe (34). According to the invention, the control unit (14) generates a desired value (36) for the position of a valve member (26) that is driven by an electromotor or an electromagnet, said desired value being processed by a second electronic control unit (20) integrated in the control valve (10) with a detected actual value (38) of the position of the valve member (26) to give a correcting variable of the position for the valve member (26).