Abstract: A method of monitoring a heat exchanger of a vehicle, coated with an ozone-oxygen conversion material, including detecting the heat exchange medium temperature (tka) and heat exchange temperature (tprem) and plotting the values as a function of time, determining the area value (atka) of the heat exchange medium temperature, comparing the value of the heat exchange medium temperature with a setpoint value, repeating the foregoing steps if the sensed value is negative relative to the setpoint value, devising a quotient of the area values of such temperature, comparing the devised quotient with a defined setpoint range (RA) and determining whether such devised quotient falls within or without such defined setpoint range.

Abstract: A diagnostic system includes a temperature derivative module and a heater use module. The temperature derivative module determines a derivative of a temperature of one of a fluid of an engine of a vehicle and a component of the engine measured by a temperature sensor after a vehicle startup event. The heater use module selectively indicates that an engine heater was used before the vehicle startup event based on the derivative.

Abstract: A malfunction determination apparatus for a cooling apparatus that cools an internal combustion engine by circulating a coolant through an interior of the internal combustion engine, using an electric pump, after the internal combustion engine is started includes: a detection portion that detects the coolant temperature; and a determination portion that determines a malfunction has occurred in a thermostat, if a state in which the detected coolant temperature remains below a first threshold temperature after the electric pump begins operating, following start of the internal combustion engine, continues for at least a pre-determined time. The thermostat is a thermostat for switching from a first passage for circulating the coolant without passage via an interior of a radiator of the cooling apparatus to a second passage for circulating the coolant via the interior of the radiator, as the coolant temperature rises.

Abstract: A coolant circuit circulates coolant between an internal combustion engine and a radiator of a vehicle and is provided with a thermostat. A control unit obtains radiator side released heat amount information, which indicates the amount of heat released from coolant through the radiator or information relevant to the amount of heat released from the coolant through the radiator. The control unit determines whether a thermostat open state abnormality exists by determining whether a predetermined thermostat abnormal time correlation exists between the radiator side released heat amount information and a vehicle speed of the vehicle in a warm-up incomplete temperature range of the coolant.

Abstract: A test bench conditioning system for a working fluid of a machine located on the test bench includes at least one pump (3) for circulating the working fluid, a heat exchanger (4) for cooling the working fluid coming from the discharge line (1) of the machine and a heating device (5) for the working fluid fed into the supply line (2) to the machine and a mixing valve (6). Furthermore, a bypass (8) that can be shut off between the discharge line (1) and the supply line (2) can be provided. Setting a temperature profile for the working fluid is possible via a control device. In order to render possible an optimum simulation of a real temperature profile of an operating fluid of a machine with the slightest deviations for the predetermined profile, a connecting line (10) with a control valve (11) leads to the discharge line (1) in front of the mixing valve (6), which opens into this discharge line (1) in front of the pump (3).

Abstract: A diagnostic system includes a temperature derivative module and a heater use module. The temperature derivative module determines a derivative of a temperature of one of a fluid of an engine of a vehicle and a component of the engine measured by a temperature sensor after a vehicle startup event. The heater use module selectively indicates that an engine heater was used before the vehicle startup event based on the derivative.

Abstract: A method for providing a specification about an efficiency of a cooler for recirculated exhaust gas in an internal combustion engine includes: measuring a temperature of the recirculated exhaust gas cooled by the cooler; and ascertaining the specification about the efficiency of the cooler as a function of the measured temperature of the cooled recirculated exhaust gas. With the aid of the specification about the efficiency of the cooler it is possible to determine a failure of the cooler or to calculate a temperature of the recirculated exhaust gas in order implement an engine control system of the internal combustion engine on the basis of a reliable temperature specification that is not influenced by lag effects.

Abstract: A system and method for determining whether a shut-off valve in a cabin heating by-pass line of a thermal sub-system associated with an engine has failed that uses the pump current for a pump that pumps the cooling fluid through the by-pass line. The method includes setting a predetermined constant speed of the pump and then providing a valve command that opens the by-pass valve. The method then determines if the pump current has increased or remained substantially the same when the by-pass valve is commanded open, and determines that the by-pass valve has not opened if the pump current remains substantially constant when the by-pass valve is commanded open.

Abstract: A method for detecting an engine block heater includes block heater detection logic and a data table containing calibration thresholds. The method determines a time-series of delta (?) engine coolant temperatures (ECT), which represent the respective differences between a start-up ECT and a plurality of operating ECT values measured thereafter. The method integrates the time-series to obtain a ? ECT integral. The method also maintains an integrated engine speed parameter accumulated over the course of the detection period. Throughout the detection period, the method retrieves a threshold value from the table based on the integrated engine speed (Y-axis) versus an elapsed time (X-axis) since the detection period began. When the calculated ? ECT integral value exceeds the retrieved threshold, the method determines that the block heater was operated, which can thereafter be used to suppress sensor rationality testing or reporting of results thereof.

Abstract: In a malfunction determination apparatus and a malfunction determination method for a cooling apparatus that cools an internal combustion engine by circulating a cooling medium that flows in a first passage that extends through an inside of the engine, using an electric pump, a first temperature of the cooling medium is detected at an inlet of the first passage, through which the cooling medium flows into the inside of the engine; a second temperature of the cooling medium is detected at an outlet of the first passage, through which the cooling medium flows out from the inside of the engine; and it is determined that the switching valve is able to normally select the second passage, if both of the first temperature and the second temperature reach a first threshold value when a temperature of the cooling medium increases due to start of the engine.

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: A control system for an engine system includes a temperature sensor and a diagnostic module. The temperature sensor measures an outlet temperature at an outlet of a cooling system. The diagnostic module estimates the cooling fluid temperature, determines the cooling performance based on the outlet temperature and the cooling fluid temperature, and selectively diagnoses a fault in the cooling system based on the cooling performance and a predetermined threshold.

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 method for diagnosing a bypass valve in a bypass line for an intercooler in a supercharger for an internal combustion engine, including the following steps: ascertaining a value of an efficiency of the intercooler as the reference efficiency; actuating the bypass valve to open the bypass valve; ascertaining a value of a further efficiency of the intercooler as the diagnosis efficiency after actuating the bypass valve to open; and detecting a malfunction of the bypass valve when the absolute value of the deviation between the reference efficiency and the diagnosis efficiency is less than a specified threshold value.

Abstract: A coolant flow measurement device includes a coolant flow circuit, a cooling system, a purge system, a variable speed fluid pump, a differential pressure gage and a primary flow meter. The coolant flow circuit may be attached to a an HVAC system of the vehicle such that coolant may be circulated through the HVAC system of the vehicle. The cooling system may cool the coolant in the coolant flow circuit. The purge system may be used to purge air from the coolant flow circuit. The variable speed fluid pump may be operable to balance the fluid pressure between the device inlet and the device outlet. The primary flow meter may be operable to measure the coolant flow in the coolant flow circuit. The differential pressure gage measures a pressure differential between the device inlet and the device outlet.

Abstract: A method for detecting a malfunction of a cooling system of an internal combustion engine, comprising: detecting a coolant temperature on a side of the engine; determining a malfunction of the cooling system with the coolant temperature and the value only after a cold start of the engine.

Abstract: The present invention relates to a system for dynamometer testing of motor vehicles. The system includes a cooling device for cooling a braking device and/or a power-generating arrangement, such as the engine of a car. The system is arranged to, using the braking device, absorb power applied thereto by the power-generating arrangement. The cooling device includes a fan arrangement for producing an air stream, the air stream being intended to be directed towards the braking device and/or the power-generating arrangement and/or a heat exchanger for providing a cooling effect. The fan arrangement includes two substantially axially aligned fans, and the cooling device is arranged to rotate the fans in opposite directions relative to each other. The present invention also relates to a method.

Abstract: A coolant controller for a coolant circuit of an internal combustion engine has a housing and a thermostat valve arranged therein. The thermostat valve has at least one valve closing member loadable by a working element as a function of a temperature value, a temperature sensor as well as a heating element for the working element. The housing is provided with at least one plug from which connecting lines extend to the temperature sensor. A current supply for the heating element is present. The plug, the temperature sensor, the connecting lines and the current supply for the heating element are provided as a pre-manufactured assembly and this assembly is integrated into the housing.

Abstract: A coolant circuit circulates coolant between an internal combustion engine and a radiator of a vehicle and is provided with a thermostat. A control unit obtains radiator side released heat amount information, which indicates the amount of heat released from coolant through the radiator or information relevant to the amount of heat released from the coolant through the radiator. The control unit determines whether a thermostat open state abnormality exists by determining whether a predetermined thermostat abnormal time correlation exists between the radiator side released heat amount information and a vehicle speed of the vehicle in a warm-up incomplete temperature range of the coolant.

Abstract: A test bench conditioning system for a working fluid of a machine located on the test bench includes at least one pump (3) for circulating the working fluid, a heat exchanger (4) for cooling the working fluid coming from the discharge line (1) of the machine and a heating device (5) for the working fluid fed into the supply line (2) to the machine and a mixing valve (6). Furthermore, a bypass (8) that can be shut off between the discharge line (1) and the supply line (2) can be provided. Setting a temperature profile for the working fluid is possible via a control device. In order to render possible an optimum simulation of a real temperature profile of an operating fluid of a machine with the slightest deviations for the predetermined profile, a connecting line (10) with a control valve (11) leads to the discharge line (1) in front of the mixing valve (6), which opens into this discharge line (1) in front of the pump (3).

Abstract: An onboard cooling system diagnostic strategy utilizes at least one temperature sensor fluidly positioned between an electronically controlled engine and a thermostat. The diagnostic algorithm operates by monitoring coolant temperature during engine startup. By comparing the actual coolant temperature during engine start-up to a predicted coolant temperature that should occur if no cooling system error is present, a cooling system fault condition may be identified. If a cooling system fault is detected, the diagnostic logic may activate the engine cooling fan or intrusively open an electrically controlled thermostat while monitoring the coolant temperature response to the intrusive action. If there is a substantial change in coolant temperature responsive to the intrusive action, this phenomenon can be utilized to correctly distinguish between a thermostat failure and a vehicle configuration error corresponding to an overcooled vehicle.

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: 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: A control system for an engine system includes a temperature sensor and a diagnostic module. The temperature sensor measures an outlet temperature at an outlet of a cooling system. The diagnostic module estimates the cooling fluid temperature, determines the cooling performance based on the outlet temperature and the cooling fluid temperature, and selectively diagnoses a fault in the cooling system based on the cooling performance and a predetermined threshold.

Abstract: The invention relates to a method for determining the degree of cooling during non-operation of an internal combustion engine. Fuel temperature characteristics at and following an engine start are determined, and the degree of cooling during non-operation of the engine is determined based at least partly on the fuel temperature characteristics. Preferably, the determination of fuel temperature characteristics comprises determining the fuel temperature at the engine at a first point in time and determining the fuel temperature at the engine at a second point in time, the second point in time following the first point in time and following a start of the engine.

Abstract: A method of inspecting a heat exchanger for pressure resistance. The heat exchanger includes plural hollow refrigerant channel portions arranged in parallel and each having joints inside thereof, air passing clearances between respective adjacent pairs of refrigerant channel portions, and fins in the respective air passing clearances. The heat exchanger interior is pressurized, irradiated with light from one side, and a monochromatic image of the exchanger is captured by CCD cameras from the other side before and after the pressurization. Each image is divided into dots, luminance data of the dots of each image is converted into binary data items of white areas and black areas with reference to a threshold value, and the number of black areas is counted. The pressure resistance of the heat exchanger is judged based on an increase in the number of black areas after pressurization from the number of black areas before pressurization.

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: During operation of a single-cylinder test engine, a computer or other processor runs a simulation of additional “virtual cylinders” operating alongside the single cylinder as if all cylinders, real and virtual, were present in a real multi-cylinder engine. Temperature data from the virtual cylinders is generated, and the real cylinder is jacketed with flow passages which are supplied with heat transfer fluid at temperatures such that the thermal presence of the virtual cylinders adjacent the real cylinder is simulated. As a result of this thermal simulation, the real cylinder is able to more accurately simulate the performance that it would have if it was indeed present in a multi-cylinder engine.

Abstract: An apparatus and method for estimating blockage within a liquid strainer used in a marine vessel is provided. The apparatus includes a sensor for measuring the rate of liquid flow through the strainer and a sensor for measuring the operational speed of a device utilizing the strained liquid. The apparatus also includes a control panel and central processing unit configured to receive at least one measurement from the flow sensor and receive at least one measurement from the speed sensor. The central processing unit then compares the relationship of the measured liquid flow rate and measured device speed to a predetermined clean strainer reference relationship of liquid flow rate and device speed at an equivalent device speed to determine the degree of strainer blockage. Visible and audible indicators are actuated when blockage becomes excessive.

Abstract: A coolant controller for a coolant circuit of an internal combustion engine has a housing and a thermostat valve arranged therein. The thermostat valve has at least one valve closing member loadable by a working element as a function of a temperature value, a temperature sensor as well as a heating element for the working element. The housing is provided with at least one plug from which connecting lines extend to the temperature sensor. A current supply for the heating element is present. The plug, the temperature sensor, the connecting lines and the current supply for the heating element are provided as a pre-manufactured assembly and this assembly is integrated into the housing.

Abstract: A method and a device for operating a drive unit, which make possible a diagnosis of a function of a coolant pump in a coolant circulation of an engine in an after-running of the drive unit, independently of various external and internal conditions of the drive unit. A malfunction of the coolant pump is detected, in this instance, as a function of a variable characterizing the battery voltage of the drive unit and/or as a function of a variable characterizing a curve over time of a variable influenced by the operation of the coolant pump in the after-running of the drive unit.