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382results about "Fail safe" patented technology

Engine cooling disc valve

A multi-port rotary valve used to distribute coolant to an engine cooling system comprises a valve body having a plurality of outlet ports for directing coolant flow to a radiator circuit, a heater circuit, and an auxiliary circuit. An internal gear driven rotary disc includes a gear driven mechanism located on an inner circumference of the rotary disc. The rotary disc includes two apertures positioned on a top surface of the rotary disc for regulating predetermined flow paths and flow rates to the plurality of ports. An inlet housing body which includes an inlet port mates with the valve body and encases the rotary disc. An actuator which is coupled to a drive gear mounted internal to the inlet housing body is responsive to a control signal for transmitting a torque to the internal drive gear for rotating the rotary disc to regulate coolant flow.
Owner:VISTEON GLOBAL TECH INC

Method of controlling electronic controlled thermostat

ActiveUS20050006487A1Reliable improvement in fuel consumptionPoor temperature controlTemperature control without auxillary powerElectrical controlResponse delayEngineering
An electronically controlled thermostat control method is obtained which makes it possible to eliminate the response delay from the time that the required cooling water temperature is set to the time that the actual cooling water temperature reaches the set water temperature by controlling the flow rate, and to realize high cooling water temperature tracking characteristics with a high degree of precision at a low cost. The method of the present invention is characterized in that in an electronically controlled thermostat which is used to control the cooling water temperature of an engine, and which comprises an actuator that can arbitrarily vary the degree of valve opening without depending only on the actual cooling water temperature, the actuator is controlled by the control controller, which has means for calculating the elapsed time from the powering of the actuator to the variation of the water temperature for predicting the water temperature after the elapsed time when the cooling water temperature is controlled to an arbitrarily set water temperature, and the actuator is controlled in advance in accordance with the above-described predicted water temperature.
Owner:NIPPON THERMOSTAT CO LTD

Controller for engine cooling system

An internal combustion engine has a cylinder-head-passage through which an engine coolant flows toward a water jacket when a water pump is operated. The water pump is an electric water pump utilizing the electric power charged in the battery. A radiator is provided in the cylinder-head-passage. Even after the engine is shut off, the water pump is kept driven.
Owner:DENSO CORP

Engine cooling system

ActiveUS20050028756A1Minimizes parasitic lossIncrease and decrease flow of coolantLiquid coolingCoolant flow controlTemperature controlCylinder head
A cooling system has a diverter valve to selectively control the flow of coolant through an internal combustion engine having a cylinder block with a cooling jacket and a cylinder head mounted on the block with a cooling jacket. A controller, responsive to the temperature of the block and the head, controls the diverter valve and a water pump to provide adequate coolant flow through the head and the block as needed to maintain optimal operating temperatures. After the engine is shut off, the controller continues to operate the water pump and a cooling fan to continue to cool the engine for a period of time.
Owner:GM GLOBAL TECH OPERATIONS LLC

Engine compartment temperature sensitive louvers

A passive louver system providing supplemental and localized cooling for an engine compartment is implemented using magnetic catches for opening and closing of the louvers.
Owner:INT TRUCK INTPROP LLC

Vehicle cooling controller and cooling control method

A drive component for driving an electric water pump for causing engine coolant to flow is mounted in an engine compartment. When the ignition is off and the temperature of a exhaust heat recovery device is above a temperature, an ECU estimates a peak temperature in the engine compartment after the stop of the engine. When the peak temperature is above a temperature, the ECU stops the engine and drives the electric water pump and an electric fan for cooling the drive component for driving the electric water pump.
Owner:TOYOTA JIDOSHA KK

Controller, cooling system abnormality diagnosis device and block heater determination device of internal combustion engine

A plug of a power cord of a block heater which is mounted to a cylinder block of an engine, is connected to a household power receptacle to energize the block heater during an engine stoppage in cold climate. Thus, an engine coolant is kept warm to prevent freeze. Existence / nonexistence of the energization to the block heater during the engine stoppage is determined based on a behavior of coolant temperature or a behavior of engine rotation speed immediately after an engine start. If it is determined that the energization to the block heater exists, abnormality diagnosis of a cooling system is prohibited or a condition for the abnormality diagnosis is corrected and estimation coolant temperature is corrected.
Owner:DENSO CORP

System for monitoring the coolant level and the temperature of an internal combustion engine

The present invention relates to a non-invasive engine guard system, which comprises: a) at least one ultrasonic sensor for providing data representing the cooling fluid level in a coolant hose, wherein said coolant hose connects between said engine and a radiator; b) a temperature sensor for monitoring” whether the temperature of said engine or said coolant hose is not above a predetermined level; c) attaching means for externally attaching said ultrasonic sensor and said temperature sensor on top of said coolant hose; d) an electronic unit for controlling said system, processing said data, and for generating information related to the temperature and the cooling fluid level in said coolant hose.
Owner:EL SOL TECH

Vehicle Rooftop Engine Cooling System and Method

An vehicle rooftop cooling system includes a radiator located outside of the engine compartment of a vehicle, the radiator having a liquid coolant inside the radiator; a fan coupled to the radiator and configured to extract hot air from the radiator; a first sensor proximate to the radiator configured to measure coolant temperature of the coolant in the radiator; and a controller communicably coupled to the first sensor, the controller configured to receive inputs from the first sensor, to make determinations based on the received inputs, and to communicate control signals across a controller area network (CAN) in response to said determinations, wherein the controller is further configured to communicate a first control signal to cool the liquid coolant upon determining that the first sensor has measured temperature above a threshold.
Owner:SHEPPARD MULLIN RICHTER & HAMPTON

Cooling system, control method of the same, and motor vehicle

The technique of the invention determines whether input data for driving and controlling a cooling fan have any abnormality (steps S100 and S110), sets an actual drive level F* of the cooling fan to a high level (Hi) in the event of detection of any abnormality (step S130), and controls a fan motor to drive the cooling fan at the set drive level F* (step S140). This arrangement effectively prevents a temperature rise to an abnormally high level in any of an engine and motors even in the event of any abnormality arising in the input data.
Owner:TOYOTA JIDOSHA KK

Waste Heat Utilization Device for Internal Combustion Engine

A waste heat utilization device recovering waste heat produced by an internal combustion engine from a heat medium includes a Rankine cycle circuit including an evaporator, an expander, a condenser and a pump serially arranged in a circulation line along which a combustible working fluid circulates, a casing air-tightly enclosing the Rankine cycle circuit, and an inactivation device for creating a chemically-inactive condition inside the casing.
Owner:SANDEN CORP

Intake air temperature (IAT) rationality diagnostic with an engine block heater

A first method is suitable for vehicles having an ambient temperature sensor and employs an estimation model configured to estimate a minimum start-up engine coolant temperature (SUECT) if the engine block heater was operated during the previous soak period. A measured SUECT is then compared to estimated minimum SUECT from the model, and if it is higher, then the diagnostic logic concludes that the engine block heater was operated during the soak period, and disables the reporting its test results. A second method is suitable for vehicles without an ambient (soak) temperature sensor employs an alternative approach. Predetermined data based on actual vehicle testing over a wide range of conditions is stored in a data structure. The data describe respective minimum and maximum start-up IAT thresholds versus SUECT. The thresholds are spaced apart to define a start-up IAT window in between. In other words, the window is bounded by minimum and maximum start-up IAT thresholds. For any measured SUECT, a particular window will be set. If the measured start-up IAT falls within the window, then the engine block heater was operated during the soak period.
Owner:DELPHI TECH INC

Method for detecting errors in a motor vehicle engine cooling system

A method for detecting errors in a motor vehicle engine cooling system is proposed according to the invention, in which an algorithm is used to not only detect an error in the cooling system, but to also determine whether the thermostat valve or the temperature sensor are defective. Differentiated error detection is achieved in that a second temperature model band is calculated for the case in which the thermostat remains in the opened state. A first temperature model band is calculated for the case in which the cooling system is in order. By comparing the course of the curve for the measured actual temperature with the two temperature model bands, a selective diagnosis can be carried out and determine whether the temperature sensor or the thermostat valve is defective. No additional hardware expenditures are required.
Owner:ROBERT BOSCH GMBH

Malfunction determination apparatus for cooling apparatus and malfunction determination method for cooling apparatus

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.
Owner:TOYOTA JIDOSHA KK

Method for controlling a vehicle drive train comprising two cooling circuits

InactiveUS8215427B2Improve operationImprove the cooling of the engine in engine modeHybrid vehiclesDigital data processing detailsHeat engine
A method for controlling a vehicle drive train, which communicates or maintains in communication via at least one valve two cooling circuits operating normally and respectively associated with a heat engine and with at least one electrical member.
Owner:RENAULT SA

Method and apparatus for determining coolant temperature rationality in a motor vehicle

Methods, systems and devices for identifying irrational results from an engine coolant temperature (ECT) sensor in a vehicle are described. The vehicle suitably includes a processor in communication with the ECT sensor and an intake air temperature (IAT) sensor. The method includes the steps of receiving an ECT reading from the ECT sensor and a IAT reading at the processor, evaluating a temperature difference between the ECT reading and the IAT reading to determine if irrationality is present, and providing a fault indication in response to the evaluating step. The evaluating step includes monitoring the IAT reading during operation of the vehicle to identify the presence of an engine block heater if the temperature difference exceeds a pre-determined threshold.
Owner:GM GLOBAL TECH OPERATIONS LLC

Diagnostic apparatus for vehicle cooling system

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.
Owner:DENSO CORP

Method and system for detecting a presence of a block heater in an automobile

The present invention relates to a method and system for detecting a presence of a block heater in an automobile. In one embodiment, an automobile includes an engine, a radiator, an engine coolant temperature (“ECT”) sensor, and / or an engine control unit (“ECU”). The radiator delivers coolant to the engine to cool the engine. The ECT sensor is located in a path of the coolant and determines ECT data. The ECU determines a temperature difference between a current maximum temperature of the engine coolant temperature data at a first time period and a current minimum temperature of the engine coolant temperature data at a second time period after the first time period. When the temperature difference is greater than a predetermined temperature threshold, the ECU determines that the block heater is present. When the block heater is present, the ECU masks any engine malfunction detections.
Owner:TOYOTA MOTOR CO LTD

Variable duct apparatus for vehicle

A variable duct apparatus for a vehicle including first and second louvers to rotate around first and second axes to open and closed positions, the variable duct apparatus including: a link to connect first and second louvers; first and second stoppers disposed at the first and second louvers to control the first and second louvers at an open position; a motor to rotate the first louver; and a control device to perform an opening or closing operation for rotating the first louver to the open or closed position by supplying current to the electric motor until a lock current is detected. The control device includes an abnormality determining unit to determine that an operating state is abnormal when an operating angle of the first louver from a start of the opening or closing operation until detection of the lock current is out of a predetermined reference operating angle range.
Owner:SUBARU CORP

Cooling Device for Internal Combustion Engine and Failure Diagnosis Method for Cooling Device for Internal Combustion Engine

An ECU sets a leakage flow rate flowing through a radiator circulation passage in a closed state of a thermostat valve, calculates an estimated temperature of coolant water in the radiator circulation passage based on a set leakage flow rate and a detected water temperature of an engine-side coolant water temperature sensor, and performs a failure diagnosis for the thermostat valve based on a difference between the calculated estimated temperature and the detected water temperature of the radiator-side coolant water temperature sensor. The leakage flow rate during operation of the electric pump is set to be a larger value as compared to the leakage flow rate during stopping of the pump. As a result, a diagnostic can be prevented by improving an accuracy of failure detection for the thermostat valve.
Owner:TOYOTA JIDOSHA KK
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