45results about "Fail safe" patented technology

The present invention belongs to the field of fault diagnosis technology, and in particular relates to a fault diagnosis method, a thermostat diagnostic instrument, a storage medium and a controller; the fault state is determined by detecting characteristic temperature information of two temperature sensors and comparing the numerical characteristics of the two temperatures under specific operating conditions; due to the introduction of the intervention process of the engine operating condition, the characteristic data is filtered out of accidental factors and interference data from the engine transition process during the comparison process, thereby improving the credibility of the diagnosis; the method and product of the present invention are particularly suitable for thermostat fault diagnosis in scenarios such as hybrid vehicles or frequent start-stop conditions and large fluctuations in engine speed, and are also applicable to related diagnostic processes of the sampling area method; in addition, when using the method and product of the present invention, the temperature difference between the two water lines of the thermostat cooling system in the fault state and the normal state is relatively large, and a lower threshold can be used, further improving the reliability of the diagnosis.

The invention provides a fault removal method, electronic equipment and a vehicle, and the method comprises the steps: obtaining the operation information of an engine and the operation information of an electronic water pump, and determining whether the electronic water pump has a locked-rotor fault or not according to the operation information of the engine and / or the operation information of the electronic water pump. And in response to the locked-rotor fault, increasing the rotating speed of the electronic water pump to a preset rotating speed, and controlling the electronic water pump to operate at the preset rotating speed. After the current rotating speed of the electronic water pump is increased to the preset rotating speed, the flow of the electronic water pump is correspondingly increased. The electronic water pump can be automatically opened and recovered by increasing the flow of the electronic water pump, the locked-rotor problem occurring at a low rotating speed is eliminated, and the problem that the electronic water pump is ablated or the water temperature of an engine rises when the electronic water pump operates at a low speed is avoided. Meanwhile, the rotating speed of the electronic water pump is increased to achieve automatic flushing recovery of the electronic water pump, the alarm frequency of the electronic water pump can be reduced, the manual maintenance frequency is effectively reduced, and the user satisfaction is improved.

A first cooling system (15) has a main passage (16) through which first cooling water can circulate, a radiator (18) for performing heat exchange with the first cooling water, an intercooler (11) for cooling supercharged intake air of an internal combustion engine (1) by using the first cooling water, a bypass passage (17) connected to the main passage (16) so as to to bypass the radiator (18), and a bypass valve (21) for controlling the flow rate of the first cooling water flowing through the bypass passage (17). The intercooler (11) is positioned on the downstream side of a high-power unit (19) and on the upstream side of the radiator (18) in terms of the direction in which the first cooling water flows. The bypass valve (21) is controlled such that the first cooling water does not flow to the radiator (18) when the temperature of the first cooling water is less than a first prescribed value.

Method for controlling a closing device of an inlet opening for a cooling medium upstream of an intake air duct of an internal combustion engine of a motor vehicle, wherein the inlet opening can be opened or closed in a watertight manner via the closing device, wherein the closing device can be actuated by means of an actuator controlled by an electronic control unit, wherein the electronic control unit receives signals from a sensor installed on the motor vehicle which detects whether a certain height of water is on the roadway below the motor vehicle and, from a defined minimum height of water detected by the sensor, controls the actuator so that the inlet opening is closed, wherein the sensor measures the distance between the underside of the vehicle and the water on the roadway to detect the water height.

The invention provides an engine high-temperature backwater diagnosis method and device, a storage medium and electronic equipment, and is applied to the technical field of engine diagnos.The method comprises the steps that the water temperature and working condition data of an engine are collected in real time; the water temperature is matched with the preset water temperature in real time, and when the water temperature is higher than the preset water temperature, the duration when the water temperature is higher than the preset water temperature is recorded; whether the engine meets a preset high-temperature backwater counting condition or not is determined by applying the duration and the working condition data; when the engine meets the high-temperature backwater counting condition, the high-temperature backwater counting value of the engine in the preset time period is updated; and when the updated high-temperature water return count value is higher than a preset value, determining that the engine has a high-temperature water return fault. In the whole diagnosis process, whether the engine has the high-temperature backwater fault or not can be judged only through the water temperature and working condition data of the engine, the diagnosis process is simple, the manual participation degree is reduced, and the cost needed by diagnosis is effectively reduced.

Method for a cooling system (100), comprising: Adjusting a coolant flow with a thermostat (145) based on the thermostat position, estimating a coolant temperature (T RO ) at a position between one end of a radiator block (153) and a connection point (150) between a lower hose (143) of a radiator (141) and a heater core output line (151); and Specify a cooling system condition based on the estimated coolant temperature (T RO ), wherein the cooling system condition includes a malfunction of the radiator (141), a radiator life, and a thermostat degeneration.

A leak detection system for a coolant system includes a coolant reservoir (64) including a coolant holding portion (81, 82) configured to store coolant for the coolant system and a gas holding portion, a reservoir inlet fluidically connected to the gas holding portion (84), a reservoir outlet (90) fluidically connected to the coolant holding portion, and a pressure relief valve (94) including a valve inlet portion (96) fluidically connected to the coolant holding portion and a pressure relief outlet (98). The pressure relief valve is configured to respond to pressure in the gas holding portion to vent coolant from the coolant holding portion through the pressure relief outlet without venting gas from the gas holding portion.

The application provides a troubleshooting method, an electronic device and a vehicle. The method comprises obtaining engine operation information and electronic water pump operation information, determining whether the electronic water pump has a locked-rotor fault according to the engine operation information and / or the electronic water pump operation information. In response to determining that there is a locked-rotor fault, the electronic water pump speed is increased to a preset speed, and the electronic water pump is controlled to operate at the preset speed. After the current speed of the electronic water pump is increased to the preset speed, the electronic water pump flow is correspondingly increased. By increasing the electronic water pump flow, the electronic water pump can be self-recovered by being flushed open, the locked-rotor problem occurring at low speed can be eliminated, and the problems of electronic water pump ablation and engine water temperature rising occurring when the electronic water pump operates at low speed can be avoided. At the same time, by increasing the electronic water pump speed to realize self-recovery of the electronic water pump by being flushed open, the frequency of electronic water pump alarms can be reduced, thereby effectively reducing the number of manual maintenance times and improving user satisfaction.

This in-vehicle control device includes: a cooling period setting unit that sets a timing prior to the start timing of a predicted knock occurrence period as the increasing timing of a cooling amount of a combustion room, and sets a timing prior to an end timing of the predicted knock occurrence period as the decreasing timing of the cooling amount of the combustion room; and a cooling amount change unit that changes the cooling amount of the combustion room by a cooling mechanism on the basis of the set increasing and decreasing timings and a target cooling amount set by a target cooling amount setting unit.

A first cooling system (15) has a main passage (16) through which first cooling water can circulate, a radiator (18) for performing heat exchange with the first cooling water, an intercooler (11) for cooling supercharged intake air of an internal combustion engine (1) by using the first cooling water, a bypass passage (17) connected to the main passage (16) so as to to bypass the radiator (18), and a bypass valve (21) for controlling the flow rate of the first cooling water flowing through the bypass passage (17). The intercooler (11) is positioned on the downstream side of a high-power unit (19) and on the upstream side of the radiator (18) in terms of the direction in which the first cooling water flows. The bypass valve (21) is controlled such that the first cooling water does not flow to the radiator (18) when the temperature of the first cooling water is less than a first prescribed value.

Apparatus 1 for controlling the temperature of diesel exhaust fluid (DEF), such as an aqueous urea solution 10, in a DEF tank 3 comprises a coolant reservoir 2, the DEF tank, a coolant diverter valve (CDV) 4, coolant lines 20,21,22 to circulate a coolant 7 (e.g. water and / or ethylene glycol) between the reservoir and the tank, and a controller (60, figure 4) that commands the CDV to open / close by energising / de-energising the CDV. In a first aspect, the controller communicates with at least a first sensor 51 (e.g. Type K thermocouple) that detects coolant pressure and / or coolant temperature whereby the controller determines that the CDV has failed to close based on coolant pressure and / or temperature readings from the first sensor after the controller has commanded the CDV to close. In a second aspect, the controller determines that the CDV valve has failed to close based on detecting a location of a solenoid armature (35, figure 6a), ideally using a locator element (70, figure 6a) disposed on the armature, being incongruous with a location the armature should be in when the CDV is closed after the controller has commanded the CDV to close.

The invention relates to a method for operating a drive unit (10) of a motor vehicle, in which the drive unit (10) comprises an internal combustion engine (12) with an output shaft (16), a water pump (20) driven by the output shaft (16) via a traction element (28), and at least one knock sensor (34) by means of which irregular combustion occurring in the internal combustion engine (12) can be detected. It is verified whether a speed sensor (36), by means of which the rotational speed of the output shaft (16) can be detected, provides a speed signal characterizing the rotational speed. It is verified whether the knock sensor (34) provides a knock signal intended for characterizing irregular combustion.If it is determined that the speed sensor (36) provides the speed signal and the knock sensor (34) provides the knock signal, it is checked on the basis of the knock signal whether the output shaft (16) drives the water pump (20) via the traction element (28).

Working machine (10) with a remote diagnostic system (200), the working machine (10) comprising: an internal combustion engine (24); a pump (108) driven by the internal combustion engine (24) with an inlet (124) and an outlet (122); a coolant temperature sensor (140) designed to monitor and transmit the temperature of the coolant fluid; a pressure sensor (128) coupled to the inlet (124) of the pump (108), wherein the pressure sensor (128) is designed to monitor and transmit a pressure of the coolant fluid at the inlet (124) of the pump (108); and a control unit (136) comprising a processor, in operative connection with the internal combustion engine (24), the coolant temperature sensor (140), the pressure sensor (128) and the remote diagnostic system (200), wherein the remote diagnostic system (200) comprises a device maintenance advisor module (202) and a display module (204), wherein the device maintenance advisor module (202) comprises a processor (208) and is designed for: Monitoring the temperature of the coolant fluid during a start-up of the working machine (10), Monitoring the coolant pressure during a start-up of the working machine (10), Calculating an expected coolant pressure based on the monitored coolant temperature and coolant pressure, and Generating a fault code indicating a combustion gas leak into a cooling system (100) of the internal combustion engine (24) when the monitored coolant pressure exceeds the expected coolant pressure.

A thermal management system for controlling cooling of an engine system during shutdown, the engine system comprising an engine configured to provide power to a working machine, wherein the thermal management system comprises: a controller; the controller being configured to receive a signal indicative of an engine shutdown command; the controller being further configured to derive, infer or receive a temperature parameter of the engine system and to determine whether the temperature parameter of the engine system is above a first predetermined threshold; and wherein the controller is configured to signal the progressive reduction of a speed of the engine prior to issuing a signal to shutdown the engine in the event that the first predetermined threshold is exceeded when the engine shutdown command is received, thereby cooling the engine system prior to engine shutdown.

The application discloses a kind of clutch fan rotation speed abnormality monitoring method, device, equipment and medium.The clutch fan rotation speed abnormality monitoring method includes: obtaining the current operating state of the engine of vehicle, and according to the current operating state of the engine, determine the target fan rotation speed abnormality early warning condition of electric control silicon oil clutch;When the electric control silicon oil clutch fan meets the target fan rotation speed abnormality early warning condition, trigger target timer, and when target timer timing overflow, generate fan rotation speed abnormality early warning signal.The technical scheme of the embodiment of the application can discover fan rotation speed abnormality in time and prompt user, to avoid the closed-loop control failure of electric control silicon oil clutch fan, guarantee user driving safety.

A thermal management system for controlling cooling of an engine system during shutdown, the engine system includes an engine configured to provide power to a working machine, wherein the thermal management system includes a controller which is configured to receive a signal indicative of an engine shutdown command. The controller is further configured to derive, infer or receive a temperature parameter of the engine system and to determine whether the temperature parameter of the engine system is above a first predetermined threshold; and wherein the controller is configured to signal the progressive reduction of a speed of the engine prior to issuing a signal to shutdown the engine in the event that the first predetermined threshold is exceeded when the engine shutdown command is received, thereby cooling the engine system prior to engine shutdown.

The invention relates to a motor vehicle comprising: - a grille (K) including a cooling system which includes ventilation flaps (V) actuable between closed and open positions, either opposing or allowing airflow; - at least one controller (S) connected to the flaps (V), said controller comprising: - a means (C) for counting flap actuations; - at least one warning means (A) sending an alert if the number of flap (V) actuations reaches a first predetermined threshold; - at least one means (B) for locking the flaps in the open position, commanding the flaps (V) to be locked in the open position if the number of flap (V) actuations reaches a second predetermined threshold higher than the first threshold. The invention also relates to a method and a program based on such a vehicle. Figure 1

This invention discloses a cooling device that circulates refrigerant to a cooled object via a siphon cycle using the object being cooled, mounted on a vehicle, as a heat source. The cooling device includes: a tank disposed above the cooled object for storing the refrigerant; an outlet passage opening inside the tank for allowing the refrigerant to flow out; a passage member extending from the inside to the outside of the tank, with its opening end located on the inner side of the tank positioned above the opening of the outlet passage; and a determining unit disposed on the outer side of the passage member located outside the tank, capable of determining the position of the opening end inside the tank.

An abnormality determination device, an abnormality determination method, and a storage medium for a water pump are provided. An input variable mapped by processing image data obtained by capturing an outer surface of the water pump is acquired. A circuit executes a plurality of provisional determination results from a plurality of mappings. Each of the plurality of provisional determination results is obtained by executing a provisional determination process for each of output variables output from the plurality of mappings. A determination determination process determines provisional determination results that account for more than half of the plurality of provisional determination results as a final determination result of whether a leakage of cooling water has occurred in the water pump.

Methods and systems are provided for cooling an engine by operating an electrically driven air intake compressor. In one example, in response to determining, based on a measured or inferred engine temperature, that the engine temperature is greater than a threshold temperature, an electrically driven air intake compressor of the vehicle is employed to direct air through a charge air cooler and engine cylinders while the engine is rotating without fueling. In this way, the engine temperature can be reduced even in conditions that would not normally be suitable for engine cooling, such as at idle-stop or when the engine coolant system is degraded.

Method for calibrating after-run activation of a pump (80) of a low-temperature cooling circuit for a turbocharged engine, said low-temperature cooling circuit comprising a turbocharger cooling conduit (130) directly connected to an expansion tank (90) of the low-temperature cooling circuit. The method is based on finding a correlation between the noise of the coolant bubbling in the cooling circuit at low temperature and a physical parameter such as engine oil temperature.

A method and apparatus (1) for fault detection of a coolant diverter valve (4). The coolant diverter valve (4) is arranged in a coolant system to control flow of coolant from a coolant reservoir (2) to a diesel exhaust fluid tank (3). At least a first sensor (50) is provided for measuring the pressure and / or temperature of the coolant. During operation of the coolant diverter valve (4), as required from time to time, the coolant diverter valve (4) is commanded to open by energising the coolant diverter valve (4) and commanded to close by de-energising the coolant diverter valve (4). Based on readings from the first sensor (50) a controller (60) can determine if the coolant diverter valve (4) has failed to close when the coolant diverter valve (4) is de-energised.

An automotive cooling fan assembly includes fan driven by a motor. The motor supported by a motor support structure of a shroud. The motor support structure includes a motor carrier and support arms extend radially outward from an outer surface of the motor carrier. The fan includes a central hub and blades that extend radially outward from the side of the hub. An axial operating gap is disposed between an end of the hub and the motor support structure. The motor support structure includes a protrusion that protrudes axially into the operating gap and serves to govern an extent of deflection of the fan during a water fording event.

A method for a relay-controlled multi-speed cooling fan system coupled to an engine (10), comprising: if other electrical loads are stable: Measuring a current when a fan speed changes; and Indicate fan system degradation based on a relative change in current.

The present application relates to a kind of water leakage diagnostic method, device, equipment and storage medium, method includes: in the case where oil-electric hybrid vehicle is powered on and vehicle meets first preset condition, control electronic water pump in cooling system in vehicle to operate, to drive the cooling liquid flow of cooling system in heating ventilation and air conditioning cycle;First preset condition includes the one or more of the following conditions: the shutdown duration of vehicle is greater than preset duration, the temperature of cooling liquid is less than preset temperature threshold, upper cycle water leakage fault flag is true;In the case where the first operating parameter of electronic water pump obtained meets second preset condition, determine that cooling system appears cooling liquid leakage;Second preset condition is that the speed in first operating parameter is greater than first preset speed threshold, and the current in first operating parameter is less than first preset current threshold.The present application carries out cooling liquid leakage diagnosis by the operating parameter of original electronic water pump in cooling system, does not need to increase additional component, and can be executed in advance after vehicle is powered on, can foresee the cooling liquid leakage of cooling system in time, improves the timeliness of water leakage diagnosis.

A method and apparatus for fault detection of a coolant diverter valve. The coolant diverter valve is arranged in a coolant system to control flow of coolant from a coolant reservoir to a diesel exhaust fluid tank. At least a first sensor is provided for measuring the pressure and / or temperature of the coolant. During operation of the coolant diverter valve, as required from time to time, the coolant diverter valve is commanded to open by energising the coolant diverter valve and commanded to close by de-energising the coolant diverter valve. Based on readings from the first sensor a controller can determine if the coolant diverter valve has failed to close when the coolant diverter valve is de-energised.

A leak detection system for a coolant system includes a coolant reservoir including a coolant holding portion configured to store coolant for the coolant system and a gas holding portion, a reservoir inlet fluidically connected to the gas holding portion, a reservoir outlet fluidically connected to the coolant holding portion, and a pressure relief valve including a coolant inlet portion fluidically connected to the coolant holding portion and a pressure relief outlet. The pressure relief valve is configured to respond to pressure in the gas holding portion to vent coolant from the coolant holding portion through the pressure relief outlet without venting gas from the gas holding portion.

For a hybrid vehicle where a high-power unit is mounted, a cooling system includes a first cooling system for cooling the high-power unit. The first cooling system includes a main passage for allowing a first coolant to circulate through the main passage; a radiator for performing heat exchange with the first coolant; a cooler for cooling supercharged intake air supplied to an internal combustion engine; a bypass passage connected to the main passage so as to bypass the radiator; and a bypass valve for controlling a flow rate of the first coolant flowing through the bypass passage. The cooler is located downstream of the high-power unit and upstream of the radiator in a direction of flow of the first coolant. The bypass valve is controlled to prevent the first coolant from flowing to the radiator, when the first coolant has a temperature lower than a first predetermined value.

To provide an on-vehicle control device which can reduce cooling loss and friction loss while effectively suppressing knocking.SOLUTION: An on-vehicle control device mounted on an automobile with an internal combustion engine having a combustion chamber as a drive source, comprises: a cooling-timing setting unit that sets a timing which is earlier than a start timing of a predicted knock occurrence period by a prescribed time as an increase timing of a cooling volume of the combustion chamber, and also setting a timing which is earlier than a finish timing of the predicted knock occurrence period by a prescribed time as a decrease timing of the cooling volume of the combustion chamber; and a cooling volume change unit that changes the cooling volume of the combustion chamber with a cooling mechanism on the basis of the set increase timing, the decrease timing and a target cooling volume which is set by a target cooling volume setting unit.SELECTED DRAWING: Figure 5

The present invention relates to an assembly for a motor vehicle comprising: - a pump support (17) having mounting interfaces (24.1, 24.2, 24.3) on the internal combustion engine housing and at least one indexing device for the position of said pump support (17) relative to the internal combustion engine housing, and - a heat shield (37) having mounting tabs (38), each mounting tab (38) being provided with at least one mounting interface (39.1, 39.2) on the internal combustion engine housing, said heat shield (37) further comprising at least one indexing device for the position of the heat shield (37) relative to the pump support (17). Figure 2