Abstract: Embodiments described herein include a data acquisition unit having a plurality of ports that are each configured to receive a signal from a respective temperature sensor of a device under test. Each of the temperature sensors is associated with a location with respect to the device under test. The data acquisition unit also includes a processor configured to determine a temperature corresponding to each temperature sensor, based on the signal received from the respective temperature sensor. The processor can then generate a thermal gradient for the device under test based on the temperature and the location of each of the temperature sensors. This thermal gradient can then be output for further analysis. Additional embodiments may be described and/or claimed herein.

Abstract: A system and method of optimizing water cooling system energy efficiency, including a monitoring device to receive heat data corresponding to heat energy of a unit of water associated with a recirculating water system, power data corresponding to power being applied to the system, and load data corresponding to a load associated with the system. The monitoring device determines a measured metric by calculating a measured rate of water traversing the recirculating water system based on the heat data and determining a ratio of the power data and the measured rate of water. The monitoring device determines an efficiency metric of the system by comparing the load data to a look-up table and, based thereon, calculates a key performance indicator of the recirculating water system as a ratio of the efficiency metric and the measured metric, which is output to a graphical user interface.

Abstract: A system and method for monitoring the temperature of a platen and a workpiece disposed on that platen is disclosed. Since the platen is a dielectric material, its properties, such as resistivity and conductivity, may change as a function of temperature. By understanding the relationship between these parameters and temperature, it may be possible to indirectly determine the temperature of the platen. For example, the platen may be in electrical communication with a power supply, which provides a clamping voltage for the workpiece. By monitoring the current waveform associated with the clamping voltage, it is possible to determine changes in the characteristics of the platen. Based on these changes, the temperature of the platen may be calculated.

Abstract: The present disclosure relates to a fiber optic network including first and second optical components desired to be optically coupled together, and third and fourth optical components desired to be couple together. The first and second optical components include first and second de-mateable connection locations having dust caps with first coordinated indicia. The third and fourth optical components include third and fourth de-mateable connection locations having dust caps with second coordinated indicia.

Abstract: An intelligent thermostatic method for an air conditioner blowing cold and hot air has steps of calculating an estimated thermal load according to an indoor temperature, an outdoor temperature, a configured temperature, a sunlight intensity, and a cooling/heating capacity corresponding to the estimated thermal load; adjusting the air conditioner according to the estimated thermal load and providing an estimated cooling/heating capacity; and determining a difference value between an actual cooling/heating capacity and the estimated cooling/heating capacity and adjusting the air conditioner according to the difference value for thermostatic control. Accordingly, the air conditioner of the present invention has enhanced power utilization efficiency of the air conditioner without having to repeatedly turn on and off the electric compressor of the air conditioner.

Abstract: Methods and systems are provided for diagnosing each of a plurality of engine cooling system components including various valves and grill shutters. Each valve may be individually closed and opened for a specified duration, and corresponding changes in coolant temperature may be monitored. If all the components are functional, the various valves may be adjusted to stagnate coolant at the engine and expedite engine warm-up during a cold-start.

Abstract: A high temperature measurement probe comprises an elongate probe body having a measuring head which in use is located in a hot fluid flow. The probe further comprises a thermocouple extending along the interior of the probe body to terminate at a temperature-sensing thermocouple junction inside the measuring head. The probe body has internal passages for circulation of a coolant fluid therein. The measuring head contains a channel, one end of the channel forming an inlet for receiving hot fluid from the hot fluid flow and another end of the channel forming an outlet for discharging the hot fluid received at the inlet. Between the inlet and the outlet a section of the channel extends along the length direction of the probe body. The thermocouple runs along the section of the channel with the thermocouple junction proximate the upstream end of the section.

Abstract: A hygrometer and dew-point instrument is provided that is structurally simple while reducing the workload during maintenance. The hygrometer measures relative humidity of a measurement space, and has a main body that encapsulates a working fluid therein and causes a heat-pipe phenomenon. The main body is disposed across the measurement space and an external space spaced from the measurement space by a heat-insulating part and has a temperature lower than the measurement space. A first temperature deriving part derives the temperature of the main body in a section where the working fluid evaporates. A space temperature detecting unit detects the temperature of the measurement space. A computation unit calculate relative humidity of the measurement space based on the temperature of the main body derived by the first temperature deriving part and the temperature of the measurement space detected by the space temperature detecting unit.

Abstract: Ambient temperature is determined using a vehicle-implemented system based on an estimated ambient temperature determined in view of a radiator fluid temperature profile. During periods of radiator fan operation, radiator fluid temperature is measured and logged to create the radiator fluid temperature profile. A best-fit polynomial is fitted to the radiator fluid temperature profile, and a coefficient from the best-fit polynomial is used to reference a best-fit equation to ambient temperature relation. The relation is predetermined for the particular vehicle configuration, and the ambient temperature is estimated based on the coefficient from the fitted best-fit polynomial.

Abstract: An outside air temperature (OAT) diagnostic system includes an ambient temperature monitoring module that receives (i) an OAT signal from an OAT sensor and (ii) an intake air temperature (IAT) signal from an IAT sensor of an engine. The ambient temperature monitoring module compares the OAT signal to an IAT signal and generates a first difference signal. A performance reporting module determines whether the OAT sensor is exhibiting a fault and generates an OAT performance signal based on the first difference signal.

Abstract: An electric compressor capable of following temperature changes of a power element even if a temperature measurement unit is disposed separately from the power element. In the electric compressor, the temperature measurement unit (34) measures the temperature of a substrate (36) on which the power element (31) is disposed. A rotational speed detection unit (35) detects the rotational speed of a motor. A control unit (33) estimates the temperature of the power element (31) on the basis of the rotational speed of the motor detected by the rotational speed detection unit (35) and the temperature measured by the temperature measurement unit (34).

Abstract: In a method and a device for diagnosing a switchable coolant pump for circulating a coolant in a coolant circuit of an internal combustion engine, an actual value of the cylinder head temperature of the internal combustion engine is measured and the actual value of the cylinder head temperature is compared with a model value of the cylinder head temperature. The functionality of the coolant pump is assessed according to the comparison result.

Abstract: A thermostat disposed to operate in a direction that is normal to the direction of flow of the fluid for which the thermostat regulates the temperature. In one embodiment, the thermostat comprises two mating faces, their movement being controlled either by the expansion or contraction of the carefully selected and apportioned materials in the thermostat pack or by a sensor-triggered controller in response to the temperature of the fluid to which the thermostat is exposed. The first type or Type 1 is normally closed, typically for use in liquid-cooled engines. The second type or Type 2 is normally open, typically for use in industrial applications, such as in solvent evaporation/recycle units where it is desirable to stop direct coolant flow into a paint gun cleaner or a similar equipment, when the temperature of the coolant reaches beyond a pre-determined upper limit.

Abstract: When the driving wind and the cooling wind are generated, based on the phenomenon in which the temperature difference is generated between the front surface and the rear surface of the radiator (14), the temperature difference between the detection value of the rear temperature sensor (22) and the detection value of the front temperature sensor (21) is compared with the abnormality determination value so that it is determined whether the front temperature sensor (21) and the rear temperature sensor (22) are properly fixed on the radiator (14), whereby it is determined whether the abnormality (unauthorized alteration) exists. By setting the abnormality determination value according to the ambient temperature and the vehicle speed, corresponding to a variation in temperature difference between the front surface and the rear surface of the radiator (14), the abnormality determination value is varied to be set at a proper value.

Abstract: A temperature detector for measuring temperature of a heat exchanger of a vehicular air-conditioning unit includes a holder holding temperature measuring means for measuring the temperature of the exchanger and a harness connected to the measuring means. The holder has a through hole through which a measuring section of the measuring means extends, and first and second grip parts through which the harness extends. The first grip part has such a width dimension that the harness having a width dimension in the horizontal direction can be inserted therethrough, and the second grip part has such a width dimension that the harness having the width dimension in the vertical direction can be inserted therethrough and that the harness having the width dimension in the horizontal direction can not be inserted therethrough. Accordingly, a portion of the harness between the first and second grip parts is twisted and held by the holder.

Abstract: An engine coolant temperature estimation system comprises a coolant temperature estimation module and a coolant monitoring module. The coolant estimation module estimates an engine coolant temperature based on at least one of a mass air flow, a vehicle speed, and an ambient temperature. The coolant monitoring module selectively operates an engine based on the estimated engine coolant temperature.

Abstract: In a method for monitoring the functionality of a temperature sensor that can deliver an electrical signal as a function of the measured temperature and is disposed, in particular, in the cooling water circuit of an internal combustion engine, the persistence of the temperature sensor in the high signal range is made possible by a method encompassing the following steps: Characterizing the sensor as possibly faulty if the sensor indicates, upon engine shutdown, at least a maximum value of the cooling fluid temperature; determining a first gradient of the cooling fluid temperature, measured by the possibly faulty sensor, up to a first point in time after engine shutdown, and characterizing the sensor as fault-free if the gradient exceeds a minimum value; determining a second gradient of the cooling fluid temperature, measured by the possibly faulty sensor, between the point in time and a point in time after engine shutdown, and characterizing the sensor as fault-free if the second gradient exceeds a minimum va

Abstract: A guide system for signal lines includes a guide tube, through which the signal lines are guided, a cooling system which laterally surrounds the guide tube and has at least one coolant chamber and at least one inlet and at least one outlet for the coolant. The coolant chamber is tubular in construction and is hermetically sealed by a seal at least at one end face.

Abstract: When the driving wind and the cooling wind are generated, based on the phenomenon in which the temperature difference is generated between the front surface and the rear surface of the radiator (14), the temperature difference between the detection value of the rear temperature sensor (22) and the detection value of the front temperature sensor (21) is compared with the abnormality determination value so that it is determined whether the front temperature sensor (21) and the rear temperature sensor (22) are properly fixed on the radiator (14), whereby it is determined whether the abnormality (unauthorized alteration) exists. By setting the abnormality determination value according to the ambient temperature and the vehicle speed, corresponding to a variation in temperature difference between the front surface and the rear surface of the radiator (14), the abnormality determination value is varied to be set at a proper value.

Abstract: Provided is a man-clothing-environment (MCE) simulator quantitatively measuring properties of clothes to transfer heat and moisture between human skin and an external environment. The MCE simulator includes a hot chamber providing a high-temperature environment, a cold chamber providing a low-temperature environment, a skin model selectively coupled to the hot chamber or the cold chamber while being vertically erect, a water supplier supplying water to a hot plate included in the skin model, and a controller controlling the hot chamber, the cold chamber and the skin model, and processing data on temperature and humidity measured by sensors. The skin model includes the hot plate receiving heat and water while being vertically erect and simulating human skin, a ring-shaped frame coupled to a side of the hot plate and supporting a fabric to be separated from the side of the hot plate, and the sensors measuring temperature and humidity inside and outside the fabric.

Abstract: An engine coolant temperature estimation system comprises a coolant temperature estimation module and a coolant monitoring module. The coolant estimation module estimates an engine coolant temperature based on at least one of a mass air flow, a vehicle speed, and an ambient temperature. The coolant monitoring module selectively operates an engine based on the estimated engine coolant temperature.

Abstract: There are occasions when an intermittent abnormality occurs in a water temperature sensor that is of a type that does not cause a sudden change in a detection value of the water temperature sensor. The movement of the detection value of the water temperature sensor when this type of abnormality occurs may be, for example, a movement in which the detection value of the water temperature sensor becomes lower even through warm up has been proceeding after engine start up has begun. When this type of movement of the detection value occurs, if the detection value of the water temperature sensor reduces, after engine start up has begun, to a value lower than that when start up began, it is immediately determined based on this fact that an abnormality of the water temperature sensor is occurring.

Abstract: Disclosed therein is a water temperature sensor for an air conditioner of automotive vehicles, which is mounted inside an air-conditioning case for measuring the temperature of cooling water, thereby preventing an air leakage from a mounted position of the water temperature sensor, enhancing work efficiency and productivity by reducing the number of components and the number of work processes, and greatly improving a response to heat around the sensor and a degree of precision in temperature measurement.

Abstract: A fault diagnostic apparatus is provided that enables improving estimate accuracy of the temperature of an object to be examined and to improve fault diagnosis accuracy of a temperature detector for detecting a temperature of the object to be examined. The fault diagnostic apparatus is for diagnosing a fault of a water temperature sensor for detecting a temperature of cooling water and includes a fault diagnostic device for diagnosing a fault of the water temperature sensor based on a change in temperature detected by the water temperature sensor in a situation where a parameter to be a chief source of heating the cooling water (such as an engine temperature) decreases.

Abstract: A generator monitoring system and method includes a plurality of sensors (12) disposed within a generator enclosure (18) to sense health conditions of a generator (10) housed within the enclosure. The sensors are interconnected to provide a single communication path (14) for allowing communication with the plurality of sensors. A monitoring device (16) outside the generator enclosure receives health condition information from each of the plurality of sensors via the single communication path. A sensor may be disposed within the generator enclosure to detect particulates emitted from a monitored portion (e.g., 52) of the generator housed within the enclosure. A sensor may be disposed proximate a bus bar connection (130) of the generator to sense a health condition of the bus bar connection and generate corresponding health condition information provided to the monitoring device.

Abstract: An apparatus (10) for performance testing of heat dissipating modules (19) includes an enclosure (11) configured for receiving the heat dissipating module therein, a vertically movable platform (13) for supporting the enclosure thereon, a boosting mechanism (18) configured for raising the vertically movable platform, and a force gage (12) having a force-sensing portion (121) configured for abutting against a top of the heat dissipating module. The enclosure includes a mounting base (110) having a plurality of mounting holes (1101) defined therein configured for mounting of heat dissipating modules with various sizes thereon. The present heat dissipating module testing apparatus can fit heat dissipating modules with various sizes. Thus saving both cost and time in testing.

Abstract: The invention provides a failure diagnosing apparatus having a first sensor for detecting a temperature of cooling water of an engine mounted on a vehicle and a second sensor for detecting a temperature associated with the engine. The apparatus calculates a first difference between a temperature detected by the first sensor at the time when the engine stops in a previous operating cycle and a temperature detected by the first sensor at the time when the engine starts in a current operating cycle is calculated. The apparatus also calculates a second difference between a temperature detected by the second sensor at the time when the engine stops in the previous operating cycle and a temperature detected by the second sensor at the time when the engine starts in the current operating cycle. It is determined whether the first sensor is faulty based on the first difference and the second difference.

Abstract: There is provided a multi-mirror system for an illumination system with wavelengths ?193 nm. The multi-mirror system includes (a) an imaging system having a first mirror and a second mirror, (b) an object plane, (c) an image plane in which the imaging system forms an image of an object, and (d) an arc-shaped field in the image plane, where a radial direction in a middle of the arc-shaped field defines a scanning direction. The first and second mirrors are arranged such that an edge sharpness of the arc-shaped field is smaller than 5 mm in the scanning direction. Rays traveling from the object plane to the image plane impinge a used area of the first and second mirrors with incidence angles relative to a surface normal of the mirrors ?30° or ?60°.

Abstract: A method for determining the existence of a “short time” type state within a vehicle control assembly 10. The method requires the measurement of the temperature 59 of engine coolant 16 at a first time 61 and the determination and/or the inferential creation of the temperature 60 of the engine coolant 16 at a second and later time 62. A “short time” type state is identified when the temperature 60 at the second time 62 is greater than or equal to the temperature 59 at the first time 61.

Abstract: A diagnostic system for a motor vehicle comprises a component installed within motor vehicle. The system further includes an identifier device mechanically coupled to the component. The identifier device comprises an identifying portion which identifies the component, and the identifier device also comprises a sensor which senses the physical environment in which the identifier device is located. A diagnostic method for a motor vehicle comprises mounting a component within the motor vehicle. The method further includes mechanically coupling an identifier device to the component, the identifier device comprising an identifying portion which identifies the component and the identifier device also including a sensor. The method also comprises confirming, with data provided by the identifying portion, that the identifying portion correctly corresponds to the component. Further, the method includes confirming, with data provided by the sensor, that the identifier device is properly coupled to the component.

Abstract: A temperature sensing device for an internal-combustion engine includes a carrier structure, a first sensor element accommodated on the carrier structure, a second sensor element also accommodated on the carrier structure, an engine air guiding device for feeding an engine intake air flow to the first sensor element, and a radiator air guiding device for feeding a radiator air flow passed through an engine radiator to the second sensor element. By way of a compact constructional unit, which can be preassembled, it is possible to centrally sense the temperatures of the two air flows. The obtained measuring signals can be coupled into a cable tree system provided on the vehicle side while the cabling expenditures are reduced.

Abstract: Methods and apparatus for reducing temperature overshoot in an engine, such as in a gas turbine aircraft engine, are described. In an exemplary embodiment, an unmeasured temperature to be regulated in an engine is determined by measuring a temperature in the engine wherein the measured temperature being related to the unmeasured temperature, determining a bias of the measured temperature wherein the bias being an amount estimated to be a difference between the measured temperature and a steady state measured temperature and adding the bias to the measured temperature to restore the relationship between measured and unmeasured temperature so that the unmeasured temperature may be properly regulated. The bias is determined using a heat transfer model.

Abstract: A guide tube is fixed adjacent opposite ends in outer and inner covers of a nozzle stage segment. The guide tube is serpentine in shape between the outer and inner covers and extends through a nozzle vane. An insert is disposed in the nozzle vane and has apertures to accommodate serpentine portions of the guide tube. Cooling steam is also supplied through chambers of the insert on opposite sides of a central insert chamber containing the guide tube. The opposite ends of the guide tube are fixed to sleeves, in turn fixed to the outer and inner covers.

Abstract: A manifold for a heat exchanging appliance is disclosed. The manifold may include an externally adjustable bypass valve, a compression fitting for connecting a conduit to the manifold, a flow cup for adding passes to the heat exchanging appliance, an apparatus for conveying the temperature of a medium in a nonconductive manifold to a temperature sensor, a blind threaded hole for engaging an insertion apparatus to the manifold, and an integrated thermostatic valve assembly. Methods for controlling the pressure in a pressure chamber, for connecting a conduit to a manifold, for adding passes to the heat exchanging appliance, for conveying the temperature of the medium to a temperature sensor, for engaging an insertion apparatus to the manifold, and for controlling the flow of a medium through the manifold are also disclosed.

Abstract: A temperature detector for an exhaust gas sensor comprises: an exhaust gas sensor 2 for detecting a concentration of oxygen contained in exhaust gas discharged from an internal combustion engine; a temperature sensor 6 for measuring an environmental temperature which is substantially the same as the exhaust gas sensor 2; a resistance measuring means 12 for measuring an internal resistance value of the exhaust gas sensor 2; a timer means 10 for measuring an operation stop time of the internal combustion engine; and a control means 8 for detecting the internal resistance value of the exhaust gas sensor 2 and the environmental temperature at each operation starting point when a period of operation stop conducted by the timer means 10 is longer than a predetermined period, for calculating a characteristic of the internal resistance value versus the temperature of the exhaust gas sensor 2 from both the internal resistance of the exhaust gas sensor and the environmental temperature, for renewing and storing them, a

Abstract: A fixing method of a temperature sensing element of an air conditioner and its assembling method, including a fixing portion to be fixed to a main body, an opening portion forming an opening surface, a folded portion having a holding portion for holding a temperature sensing element, an accommodating portion installed as being opened at the opening surface, for accommodating a tip of the temperature sensing element, and a foldable thin wall portion installed between the opening portion and the folded portion, in which the fixing portion, opening portion, thin wall portion, and foldable portion are integrally formed, the temperature sensing element is installed in the holding portion, the thin wall portion is folded, and the folded portion is fitted to the opening portion. In this constitution, damage or breakage of the temperature sensing element can be prevented. Further, direct contact by the user is prevented.

Abstract: Disclosed is a method for controlling an engine during the malfunctioning of a coolant temperature sensor.

Abstract: A method and apparatus for characterizing a quench for producing desired hardness characteristics on a steel part. The characterization preferably includes a series of heat transfer coefficients versus temperature for the quench determined from information representative of known quenches and distinguishing part characteristics such as geometry, size and composition. The quench characterization determined using the present method and apparatus can be utilized in hardness prediction software programs, and for determining a suitable quench for producing the desired hardness characteristics on the part.

Abstract: An abnormality detector apparatus for an engine water-cooling apparatus has an electronic control unit (ECU) for precisely and quickly determining and detecting an operation abnormality of a thermostat or a water temperature sensor. After the engine is started, the ECU calculates, over time, an engine heat generation quantity, an estimated cooling water temperature or the like on the basis of various engine operating condition parameters, such as cooling water temperature, intake temperature, engine revolution speed, amount of intake air, and the like. After the elapse of a predetermined time, the ECU compares the estimated cooling water temperature and the cooling water temperature actually detected by the water temperature sensor. If the relationship therebetween meets a predetermined condition, the ECU determines whether there is an abnormality in the operating condition of the thermostat and/or the cooling water temperature sensor.

Abstract: A process for the model-supported simulation of the coolant temperature in the case of a vehicle is provided. Conventionally, two temperature sensors are used for determining the coolant temperature, in which case one exists only for determining the temperature when an engine is switched off. Such an additional sensor is cost-intensive and should be avoided. The process avoids using an additional sensor by detecting the coolant temperature at the point in time of the switching-off of the driving engine. A current coolant temperature is continuously calculated while including vehicle-specific data using a temperature model. As an alternative, the current coolant temperature is not continuously calculated, but rather is calculated from a point in time as of which a theoretically determined coolant temperature falls below a specific value.

Abstract: The present invention provides a method of inferring the engine coolant temperature in cylinder head temperature sensor equipped vehicles including the steps of measuring the cylinder head temperature, calculating the engine coolant temperature from the measured cylinder head temperature as a function of at least one vehicle operational state, generating a signal for the calculated engine coolant temperature, and sending the generated signal to a display.

Abstract: A system for estimating a temperature of a vehicle hydraulically-operated transmission including a hydraulic torque converter, a plurality of frictional engaging elements such as clutches installed in the transmission and a hydraulic pressure supplying circuit for discharging hydraulic fluid from one of said plurality of frictional engaging elements and for supplying hydraulic fluid to another to bring said one and another one of said plurality of frictional engaging elements into operation such that gear-shift is effected in the transmission. A heat quantity generated by the hydraulic coupling means (.DELTA.Ttr), a heat quantity generated by at least one of the frictional engaging elements at gearshift (.DELTA.Tcl(No)), a heat quantity generated by stirring of the hydraulic fluid (.notident.Tst), a heat quantity generated or absorbed at a heat exchanger which exchanges heat from the fluid (.DELTA.

Abstract: A process correctly senses an outside temperature. In the case of vehicles, outside temperature sensors are conventionally provided which falsify measuring results due to environmental and outside influences. For example, the engine temperature heats the temperature sensor to a different degree according to the driving speed, the driving situation and condition or, shortly after the switch-off. The process correctly senses an outside temperature, by which a signal can be formed which corresponds to the actual value of the outside temperature. The outside temperature is sensed by a temperature sensor arranged in a vehicle. A corresponding temperature signal is generated. The vehicle operating and/or vehicle condition requirements are sensed. Correction values are determined as a function of the vehicle operating and/or vehicle condition requirements. Finally, the temperature signal emitted by the temperature sensor is changed corresponding to these correction values.

Abstract: The invention provides an arrangement for detecting the temperature of an automatic gearbox which has a temperature sensor and a starter-interlock contact switch in the gearbox component and, externally with respect thereto, a gearbox control device to which signal information from the temperature sensor and from the starter-interlock contact switch can be fed via separate signal lines. The temperature sensor and the starter-interlock contact switch are connected to a common signal line which leads to the gearbox control device, specifically in a series or parallel circuit arrangement.

Abstract: A temperature sensing system for an internal combustion engine includes a heat transfer element communicating with both the engine coolant passage in the cylinder head and the cylinder head itself. A temperature sensor is used to sense the temperature of the heat transfer element. During normal engine operating conditions, the system records engine coolant temperature. During a loss of coolant, the system records cylinder head temperature.

Abstract: The present invention concerns a thermal sensor designed to house two thermistors in a metallic case to detect temperatures of a cooling water of engines.The thermal sensor is composed of a metallic case in a tip portion of which the first thermistor is inserted thermally insulated from the second thermistor provided in a portion other than the tip portion thereof.A plurality of uneven portions are provided on the outer surface of the tip portion of the metallic case to effectively radiate the heal generated by the second thermistor and substantially reduce a thermal interference against the first thermistor in the metallic case to give a sensitive response to a change in the temperature of the cooling water.

Abstract: Disclosed is a method for monitoring the status of a motor vehicle engine cooling system including sensing the pressure and temperature of coolant in the cooling system, generating respective output signals, and processing the output signals to generate an indication of a coolant system fault condition when the pressure of the coolant falls below a preset limit in relation to the temperature of the coolant. Apparatus for performing the method is also disclosed. Several embodiments are disclosed for indicating a coolant system fault condition, such as adjacent gauges for visual comparison, summing of the signals to provide a combined output signal of temperature modified by pressure for display on a gauge, and/or comparing the signals to trigger a warning signal when the preset limit is exceeded.

Abstract: A quick connect diagnostic apparatus for the cooling system of a vehicle engine includes first, second and third temperature sensors which are configured to attach to liquid hoses which circulate cooling liquid throughout the engine, the first sensor attaching to a hose directly from the engine, the second and third sensors attaching to input and output hoses, respectively, connected to the radiator. The sensors are housed within a cuff structure which is wrapped around the hoses to detect the fluid temperatures within the hoses. Each sensor is connected to an analyzer which compares the first signal to a temperature threshold signal, compares the first signal to the second signal to generate a first difference signal which is then compared to a thermostat threshold signal, and compares the second and third signals to produce a second different signal which is compared to a radiator threshold signal.

Abstract: A device for monitoring the temperature and pressure of a liquid coolant in a cooling system having a sealant which seals around a needle from a pressure or temperature probe and re-seals itself upon removal of the needle. The sealant is fitted within an axial bore within the monitoring device. The needles of the pressure and temperature probes puncture the sealant and are adapted to be in communication with the cooling system. The monitoring device further includes a pressure relief probe for rapid decrease of the cooling system pressure. The invention may be for testing a closed pressurized system using the pressure probe with a valve or other orifice for pressurizing the system.

Abstract: The present invention provides a method of inferring the engine coolant temperature in cylinder head temperature sensor equipped vehicles including the steps of measuring the cylinder head temperature, calculating the engine coolant temperature from the measured cylinder head temperature as a function of at least one vehicle operational state, generating a signal for the calculated engine coolant temperature, and sending the generated signal to a display.