TW417006B - Cooling control device for internal combustion engine - Google Patents

Abstract

To provide a cooling controller capable of preventing the problem such as overheating of the internal combustion engine and, thus, can exhibit a secure fail safe function. A spring member (45) in a coil form is wound round the valve shaft (27) of the butterfly valve (26) which regulates the flow rate of cooling water. Both ends thereof are communicated with a pair of pin members (27a and 27b) standing on the valve shaft (27) respectively. The pin member (27a) which is made of a material which fuses and breaks at a prescribed temperature is fused and broken, when the cooling water is heated up to a prescribed temperature. As a result, one end (45a) of the spring member (45) comes into contact with the communication pin (25a) projecting toward the valve shaft (25) due to the return force of the spring member (45), and due to the counteraction, the valve shaft (27) is caused to rotate in the direction of opening the butterfly valve (26). Consequently, it is possible to circulate the cooling water and, thus, the problem such as overheating of the engine can be prevented.

Description

4l0〇6 V. Description of the Invention (1) Technical Field of the Invention The present invention relates to a cooling control device for cooling an internal combustion engine such as an engine for an automobile, and more particularly, to controlling the temperature rise due to the internal combustion engine ^ cooling water to the radiator side The safety protection device of the flow control mechanism of the flow. Conventional technology Λ Generally used for internal combustion engines (hereinafter referred to as engines) used in automobiles and the like, a water-cooled cooling device using a radiator on a heat exchanger is used for cooling. This cooling device is structurally 'circulated on the radiator side by cooling water heated by passing through the water jacket in the engine' and sends the cooling water cooled by the radiator to the engine's water jacket β Figure 9 shows its basic structure ' A well-known water jacket (not shown in the figure) 11 is provided in the engine E, and the cooling water extraction portion 12 and the introduction portion 13 are provided, and these are connected to the radiator R by cooling water paths 14a, 14b, and 14c. In addition, a bypass path 16 for a bypass radiator R is provided between the cooling water path 14a and the cooling water path 15. A flow control valve 19 is disposed between the cooling water paths 14a and 14b formed between the lead-out portion of the lead-in portion 11 and the inflow port 17 of the radiator R. In terms of structure, a water temperature sensor 20 for detecting the outlet water temperature of the engine E is arranged near the lead-out section of the lead-in section 11, and the information supply control unit (hereinafter also referred to as ECU) of the water temperature sensor 20 is provided. )twenty one. In addition to the cooling water temperature, the ECU 21 also provides information such as the engine speed and the accelerator opening degree, and generates a control signal for controlling the flow rate of the cooling water using the flow control valve 19. With this structure, the flow control valve 1 9 ′ can be controlled by opening and closing the flow control valve.

5. Explanation of the invention (2) The inflow of cooling water to the R side of the radiator, so that the temperature of the cooling water can be controlled in a fixed range, and the engine can be driven at the optimal temperature. Fig. 10 shows an example in which a butterfly valve is used in the flow control valve 9; that is, the casing 25 is supported in a casing 25 connected between the cooling water circuit 4a and 14b to be a circular flat plate that can be rotated by a valve shaft 27. A butterfly valve 26 is formed, for example, a worm gear 28a is attached to one end of the valve shaft 27. In addition, a worm 2 81) embedded in the drive shaft of the stepping motor 29 is engaged with the pot wheel 28a, and a reduction mechanism 28 is constituted by the worm wheel 28a and the worm 28b. And ′ uses the calculation of the ECU 21 to supply the control signal of the stepping motor 29. The stepping motor 29 rotates after receiving the control signal, and controls the opening and closing of the butterfly valve 26 through the reduction mechanism 28. Choose He, in other words, control the engine. The invention is to solve the problem of the above-mentioned accidental failure of the drive control h, such as the problem of cold or exhaust. However, in the case of failure, the condition of the cooling control butterfly valve that controls the problem of self-priming heat dissipation efficiency in the period of no discovery, During the occurrence period, the water became a problem, but especially in the case of butterfly feed, the amount of cooling water that the engine side sent to the radiator side was forced to change, and the control device was driven at the optimal temperature by using such a control order. The step becomes unable to adjust the time. For example, in the case of overcooling, the cooling engine of the valve opening heater of the valve will not develop. Overheating will cause the butterfly valve of the entire butterfly valve to enter the motor, although the direct damage is small. The amount of one 'may also come from ECU control such as the degree of opening occurring at the ECU. Occurred when the engine is opened. Fuel consumption of the engine. This ECU happened directly, and it became a fatal problem while driving. Page 5 5. Description of Invention (3). The present invention was conceived in consideration of the above problems, and an object thereof is to provide a cooling control device that prevents problems such as overheating of an internal combustion engine caused by a failure of an ECU or the like, and can perform a safety protection function. Means for Solving the Problem In order to achieve the above-mentioned object, the cooling control device of the internal combustion engine of the present invention has a circulation flow path of cooling water disposed between the internal combustion engine and the heat exchanger, and controls the cooling water flowing from the internal combustion engine to the heat exchanger according to the degree of valve opening. The flow control valve of the flow includes: a control unit that sends a motor drive signal according to the operating state of the internal combustion engine; a motor that is driven in accordance with a motor drive signal from the control unit; a flow control valve that is driven in accordance with the motor :: Degree of valve opening; U and electrical control circuit, when the condition of the internal combustion engine is detected, the flow control is forcibly driven in the direction of valve opening according to the electrical signal. Soil: 2 The preferred embodiment of this situation 'Xiao electrical control circuit After the abnormality of the internal combustion engine is detected by the electric signal: 3, the control sheet is cut off: the second connection is connected to the electric #, and the motor is supplied to open the flow control valve to move the flow. According to the electric signal that the abnormality of the internal combustion engine is detected, # 1 = the drive signal of the opening flow control valve β. When using the preferred alkenyl other sinus Β tallow can bias the control valve in the opening direction of the return Que J meal: and having a flow rate of 1 cubic commentary the yellow and the electrical control circuit

^ 〇G After the water temperature is above the fixed value, switch on and off according to the action of the thermal switch. The control can use the biasing force of the return spring to ^ _ ± 1. 5. Description of the invention (4) The circuit uses sensing cooling water to reach the index. After the thermal switch 'and the connection circuit of the element and the motor in the structure, the flow control valve. In addition, if another preferred embodiment is used, there is also a return spring that biases the control valve toward the opening direction, and a clutch mechanism that can connect and disconnect the motor and the flow control valve according to an electrical signal, and the electrical control circuit A thermal switch that switches on and off using water that senses the cooling water above a specified value, and after the clutch mechanism is released in accordance with the structure of the thermal switch, the control valve can be measured using the biasing force of the return spring. The cooling control device configured as described above has an electric control circuit for forcibly driving the flow control valve in the valve opening direction in accordance with an electrical signal when an internal abnormality is detected. The flow control is forcibly controlled using a relay such as an electrical control. The valve opens. Therefore, due to the large amount of cooling water going to the heat exchanger, the divergence rate will be increased, and the internal combustion engine will not be forced to overheat. The safety protection function is exerted. The cooling control device of the internal combustion engine of the present invention is equipped with a gas turbine and heat exchange. A flow control valve for the circulation flow of cooling water between the devices and controlling the flow of the cooling water flowing from the internal combustion engine to the heat exchanger in accordance with the valve opening. The flow control valve includes: a control unit that sends a driving signal according to the operating state of the internal combustion engine; The motor drive number from the control unit is driven; the flow control valve controls the opening degree according to the driving force of the motor; and the forced drive mechanism is arranged inside the flow control valve. Thermal performance of open-flow gas turbine volume control. In-degree control of motors, letter cooling, process cooling 417006 V. Description of the invention (5)-After the water temperature is abnormal, the flow control valve is biased toward the opening direction. If a preferred embodiment of this case is used, the forced driving mechanism is composed of a spring member rolled on a valve shaft that controls the opening and closing of the flow control valve, and a spring member disposed on the valve shaft and engaged with both ends of the spring member. The two pairs of pins holding the impeachment member are constituted ', and one of the pins is composed of a thermal sensing material which releases the engagement of the spring member after detecting the abnormality of the cooling water temperature, and the structure is used with the engagement of the pin. The return force of the released spring member causes the flow control valve to open. In addition, if another preferred embodiment of this case is used, the forced driving mechanism includes a thermocouple having a piston rod that moves after sensing the abnormality of the cooling water temperature, and a cam member that converts the movement of the piston rod into rotation. Open the flow control valve according to the rotation of the cam member. Furthermore, it is preferable to further include a power cut-off mechanism to prevent the driving force of the motor from being transmitted to the flow control valve in accordance with the movement of the piston rod of the thermoelectric surface. In addition, if another preferred embodiment is used, it also has a return spring that biases the flow control valve in the opening and closing direction, and the forced driving mechanism includes a thermocouple that has a piston rod that moves after sensing the abnormal temperature of the cooling water. And the coupling member that cuts off the driving force of the motor on the valve shaft that controls the opening and closing of the flow control valve with the movement of the piston rod of the thermocouple, and uses the return spring in the structure by the cutting action of the coupling member The bias pressure opens the flow control valve. In addition, if another preferred embodiment of this case is used, there is also a return spring that biases the flow control valve in the opening direction, and the forced driving mechanism includes a change in shape after sensing the abnormal temperature of the cooling water heat

417006 V. Description of the invention (6) The thermally actuating element of the sensing element and the connecting element that cuts off the driving force of the motor on the stern shaft that controls the opening and closing of the flow control valve using the action of the thermally actuating element. The biasing force of the return spring accompanying the cutting action of the link opens the flow control 阙. In the cooling control device configured as described above, when an abnormality of the internal combustion engine is detected, after the abnormality of the cooling water temperature of the flow control valve is sensed, the so-called mechanically opened flow control valve is caused by the forced driving mechanism. Similarly, increasing the amount of cooling water to the heat exchanger will increase the heat dissipation efficiency, and will not force the internal combustion engine to overheat and play a safety protection function. Embodiment of the Invention The cooling control device of the internal combustion engine of the present invention will be described below with reference to the embodiment shown in the drawings. In addition, the flow control unit constituting the cooling control device of the present invention is the same between the cooling water paths 14a and 14b disposed between the engine E and the radiator R shown in FIG. In addition, in the above description, the parts corresponding to those shown in Figs. 9 and 10 are indicated by the same symbols, and therefore, the description thereof is appropriately omitted. Fig. 1 shows a first embodiment thereof. A first helical gear 31 is attached to a valve shaft 27 of the flow control valve 19 of the first embodiment. In terms of structure, a motor 29 with a speed reduction mechanism (not shown) is arranged on the side wall of the casing 25, and the driving force after the speed reduction by the speed reduction mechanism is transmitted to the second helical gear 32. Further, as shown in the figure, the second helical gear 32 and the first helical gear 31 are closed in structure. Therefore, the butterfly valve 26 uses a motor 29 to control the degree of valve opening. And ‘has detected engine abnormalities according to electrical signals

417006 V. Description of the invention (7) ----- The electric control circuit of the butterfly valve is driven by the valve opening direction. That is, the water temperature meter provided with the meter panel 33 of the driving seat has a bridge circuit (not shown in the figure) including a driving coil of the water temperature meter and a thermistor that senses the temperature of the cooling water. In structure, the pointer of the water thermometer is driven toward the high temperature measurement according to the imbalance of the bridge circuit accompanying the rise of the cooling water temperature. That is, it is possible to provide information on the temperature of the cooling water electrically on one side of the bridge circuit. In addition, if the pointer of the water thermometer reaches the red zone, it can be regarded as a failure in Ecu. A level detection circuit (such as a well-known threshold circuit) 34 that detects electrical information obtained from one side of the bridge circuit at this time is connected. The level extraction circuit 34 is structurally within its threshold value. When the voltage is higher than (or lower than) the output terminal 34a is switched to the reference potential point (ground = car body). The output terminal 34a of this level price measurement circuit 34 is connected to the battery (+ 12V) via the relay 35. Therefore, the coil 35a disposed on the relay 35 is energized, so that its bipolar switching contact 35b is switched from the ECU side to the battery (+ 12V) side. Therefore, the motor 29 rotates in accordance with the voltage obtained from the battery, forcing the butterfly valve 26 to open. This suppresses the abnormal rise in the temperature of the cooling water, and implements a safety protection function. … In addition, when the cooling water temperature is lowered in the above-mentioned structure, the contact 35b is switched to the ECU side after the M, but at this level, the debt measurement circuit 34 is better in structure. For example, the built-in bistable and multiharmonic If the oscillator is operating at the on-site debt path, it will continue using the self-holding function. At this time, the current that has turned into the valve-opening direction since the battery has been stored has continued to flow to the motor.

4/7006 V. Description of the invention (8) It is better to arrange the timer contact that is activated by the relay 35 and the motor 29 between the relay 35 and the motor 29 in structure. power ups. FIG. 2 shows a second embodiment. In addition, in FIG. 2, the parts corresponding to the already explained structures are denoted by the same reference numerals, and redundant descriptions are omitted. In the second embodiment, a second motor 38 having a speed reduction mechanism is mounted on the side wall of the casing 25, so that the third helical gear 39 and the first helical gear 31 rotated are engaged with each other. Further, in the structure, when an abnormality of the engine is detected, such as an excessive rise in the temperature of the cooling water, the level detection circuit 34 sets its output terminal 35a as a reference potential point, and causes the relay 35 to operate. The relay used here is a two-contact electrical appliance with a contact that is closed due to the action of the relay and a normally closed contact that is opened by the action of the relay. That is, as shown in Fig. 2, the normally open contact 35b is connected between the battery and the second motor 38, and the normally closed contact 35c is connected between the ECU 21 and the first motor 29. On the other hand, the "operating of the relay 35 caused by an excessive increase in the temperature of the cooling water" closes the normally open contact 35b, thereby supplying the second motor 38 from the battery via the normally open contact 35b to open the butterfly valve 26. The current. At the same time, the motor driving signal < from the ECU 21 is cut off to the first motor 29 at the same time. Therefore, 'the butterfly valve 26 is forced to open by opposing the driving force of the first motor 29 and the driving force of the second motor 38 driven by the control signal from the ECU', thereby suppressing the abnormal rise of the cooling water temperature and performing prevention Engine overheating safety protection function.

Page 11 4 Π006 V. Description of the invention (9) Here, 'the first motor 29 is forced to rotate by the speed reducer built in the first motor 29'. It is good to use a reduction mechanism such as a combination of spur gears to avoid the worm gear shown in FIG. 10. In the example shown in FIG. 2, the current that has been turned into the valve opening direction due to the operation of the relay 35 continues to flow from the battery to the second motor 38. However, it is preferable that the normally open contact 35 b and the second motor 38 are structured. A timer contact which is activated by the relay operation is arranged between them, and after a predetermined time has elapsed, the power to the second motor 38 is cut off. Next, Fig. 3 shows a third embodiment. In addition, in FIG. 3, the parts corresponding to the < explained structure are denoted by the same reference numerals, and redundant descriptions are omitted. This embodiment 3 'further includes a return spring 41 that biases the butterfly valve 26 in the valve opening direction. Furthermore, a thermal switch 42 is provided in the cooling water path 4a to sense a water temperature of a predetermined value or more of the cooling water and perform a switching operation. The thermal switch 42 has, for example, a built-in bimetal (not shown in the figure), and uses the effect of the bimetal in the structure to open the switch when the temperature of the cooling water becomes a predetermined value or more. Moreover, the thermal switch 42 is interposed between the ECU and the motor 29 in terms of structure. Therefore, when the cooling water reaches a water temperature above a specified value, the heat (switch 42 operates to cut off the connection circuit between the Ecu and the motor 29. Therefore, the biasing force of the return spring 41 is used to force the butterfly valve 26 to open. In this way, the abnormal increase in the temperature of the cooling water is suppressed, and a safety protection function to prevent the engine from overheating is performed. The thermal switch 42 is not only installed in the cooling water path 14a near the butterfly valve 26 shown in the figure, but also by the Installed directly in the engine cylinder block, engine cylinder

417006 V. Description of the Invention (ίο) The first-class detected object can act more reliably (directly). FIG. 4 shows a fourth embodiment. In addition, in FIG. 4, the parts corresponding to the already explained structures are denoted by the same reference numerals', and thus repeated descriptions are omitted. The fourth embodiment is characterized in that a clutch mechanism capable of controlling connection and disconnection according to an electric signal is further provided in the transmission mechanism portion from the motor for driving the butterfly valve to the butterfly valve. That is, Fig. 4 (b) is a pattern showing the internal structure indicated by the symbol 29 in Fig. 4 (a). As shown in Fig. 4 (b), a first clutch disc 2 9B1 constituting a clutch mechanism 2 9B is mounted on a drive shaft 29A1 of the motor 29 A. Here, the drive shaft 29A1 is formed in a polygonal column shape, and the first clutch disc 29β1 side is formed into a polygonal hole as if it surrounds the drive shaft 29A1. Thereby, the first clutch disc 2961 is structurally coupled to the drive shaft 29A1 in a steering manner, and can slide in the axial direction. On the other hand, 'an annular groove portion 29B2 is formed in the peripheral side surface of the first clutch disc 29B1', and is constituted as a movable member 29B4 of the electromagnetic plunger 29B3 is fitted in the groove portion 29B2. A coil spring 29B5 is attached to the plunger 29B3, and the opening action of the coil spring 29B5 is used in a normal state where the plunger 29B3 is not energized, as shown in the figure, to pull the first clutch disc 29B1 into the motor 29A side. A second clutch disc 29B6 is disposed so as to be opposed to the first clutch disc 2ggi ', and the second clutch disc 29B6 is fixed to an input-side rotation shaft 29C1 constituting a reduction mechanism 29c. This reduction mechanism 29C is composed of a pinion gear and a spur gear, and a second helical gear 32 shown in Fig. 4 (a) is mounted on the decelerated wheel output shaft 29C2. As shown in FIG. 4 (a), one end of the 'thermal switch 42 is connected to the battery, the other end is connected to the plunger 29B3, and is also connected to the relay 35.

Page 13 4 17 0 0 6 5 'Explanation of the invention (π) Therefore' In the structure shown in FIG. 4, when the cooling water reaches a water temperature above a specified value and the thermal switch 42 is activated, the relay 35 is turned off, Therefore, the contact 35b is opened, and the control signal from the ECU to the motor 29A is cut off. In addition, the electromagnetic plunger 29B3 is turned off by the operation of the thermal switch 42 at the same time, and the clutch mechanism 29B is opened. Therefore, the biasing force of the return spring 41 is used to force the butterfly valve 26 to open. This prevents abnormal rises in cooling water temperature and performs a safety protection function to prevent engine overheating. FIG. 5 shows a fifth embodiment. In addition, in FIG. 5, the parts corresponding to the already explained structures are denoted by the same reference numerals, and redundant descriptions are omitted. In the fifth embodiment, a coil-shaped spring member 45 is arranged on the valve shaft 27 like a packaged valve shaft 27. The two ends are respectively engaged with a pair of pins 27a, 27b which are erected on the valve shaft 27. An engaging pin 25a is disposed on the casing 25 so as to protrude over the one end portion 45a of the spring member 45 toward the valve shaft 27. Here, the pin 27a near the butterfly valve 26 established on the valve shaft 27 is composed of a thermal fuse or a material that is fused at a temperature higher than a specified value. Therefore, when the temperature of the cooling water rises above a specified value, the heat is applied to the pin 27a via the valve shaft 27 and the pin 27a is fused. Fig. 5 (b) shows the state at that time, because one end portion 45a of the spring member 45, which is indicated by the "marked pin 2 7a", touches the engaging pin 25a protruding toward the valve shaft 27 by its returning force. Then, the pin 27b disposed far away from the butterfly valve 26 receives the reaction force caused by the return force of the spring member 45, so that the valve shaft 27 rotates in a direction to open the butterfly valve 26. In addition, at this time, the gears 3 丨, 32 are also forced to rotate the

V. Description of the invention (12) Motor 2 9. By using this effect, the abnormal increase in the temperature of the cooling water is suppressed, and a safety protection function to prevent the engine from overheating is performed. FIG. 6 shows a sixth embodiment. In addition, in FIG. 6 ', the parts corresponding to the already explained structures are denoted by the same reference numerals, and redundant descriptions are omitted. In this embodiment 6, it is characterized in that the structure is provided with a thermocouple with a piston rod that moves after sensing the abnormality of the cooling water temperature, and a cam member that converts the movement of the piston rod into rotation. The butterfly valve is made according to the rotation of the cam member. Open the valve. Furthermore, it is provided with a power shut-off mechanism that prevents the driving force from the motor from transmitting the butterfly valve as the piston rod moves. In the sixth embodiment, as shown in FIG. 6, the valve shaft is composed of 27A combined with the butterfly valve 26 and a valve shaft 27B equipped with a first helical gear 31 driven by a motor 29. Further, a thermocouple is disposed on the side of the valve shaft 27Λ combined with the butterfly valve 26. A piston such as wax is disposed on the thermocouple 47, and the valve shaft 27B side of the wax expansion gear 3 丨 is protruded by β to protrude. The rod 4 7 a moves in the axial direction when it expands by sensing the heat. That is, the first oblique figure 6 (b) shows that the piston rod 47a senses heat 4? And ί 5 L. The piston rod is separated from the left and right. Except for thermocouples, the shape of the end of the valve shaft 2 7 B on ° σ is complex. If the bacteria β ^, must not, the thermocouple 47 and the butterfly open, ^ -shaped state as shown in Figure 6 (c) assembled into a body, in its thorough: the other end of the valve shaft 27A of the first A part of the helical gear 3i: = 9 forms a groove portion. On the other end of the cylinder, a cylindrical portion 27B1 and a thermoelectric_47 side of Π »Ρ27B1 are installed on the other end of the cylinder, and an engaging pin 2? B2 is planted to the inner periphery.

4 17 006 V. Description of the invention (13) The surface protrudes and is embedded in the groove portion 47b. Therefore, in the state shown in Fig. 6 (a) or Fig. 6 (b) in terms of structure, the groove portion 47b and the engaged engagement pin 27B2 are used to turn and connect in the steering direction and to slide in the axial direction. The positioning pin 25b is planted on the side of the cylindrical portion 27B1 facing the cylindrical portion 27B1 against the cylindrical portion 27B1. The positioning pin 25b is assembled in the form of a recess 27B4 formed in the cylindrical portion 27B1. The recessed portion 27 B4 is formed at an angle of about 90 degrees in the circumferential direction of the first helical gear 31 side of the cylindrical portion 27B1 so that the positioning pin 25b can be inserted into the butterfly valve 26 side with a slight gap. That is, when the concave portion 27 B4 is viewed from the outer peripheral surface of the self-tapered cylindrical portion 2 7B1, it is formed in the shape of a right triangle. The cam surface 27B3 is formed on one side of the triangle. A thrust spring 48 is disposed on the end side of the valve shaft 27B, and the structure is used to bias the valve shaft 27B toward the valve shaft 27A. In the above-mentioned configuration, in the case where the cooling water is located in a specified temperature range, as shown in Fig. 6 (a) ', the piston rod 47a of the thermocouple 47 does not protrude. Therefore, the 'valve shaft 27B is pressed against the butterfly valve 26 by the action of the thrust spring 48. In this state, the positioning pin 25b, which is planted in the housing 25, is relatively positioned in a portion having an angle of 90 degrees in the circumferential direction among the recessed portions 27 B4 formed in the cylindrical portion 27B1. Therefore, in this state, by driving the motor 29, the butterfly valve 26 can be opened and closed at an angle of about 90 degrees to ensure normal temperature control of the cooling water. When the cooling water rises to a temperature higher than a predetermined value, the heat is applied to the thermocouple 47 via the valve shaft 27A. As shown above, the thermocouple 47 is sealed. Page 16 4 17006 V. Description of the invention (14) As the wax W of thermal expansion, the 'piston rod 47a' protrudes and becomes the state shown in FIG. 6 (b). That is, the valve shaft 27B is pushed back by the piston rod 47a. In this state, the positioning pin 25b planted in the housing 25 is relatively moved along the cam surface 27B3 formed in the concave portion 27 B4 of the cylindrical portion 27B1, and the intermediate shaft 27B is restricted to a fixed angle. That is, the butterfly valve 26 is locked in the open state. At this time, as the valve shaft 2 7B moves backward, the first helical gear 31 installed on the valve shaft 2 7B is disengaged and the power cut-off mechanism of the second helical gear installed on the motor 29 side acts to prevent the driving force of the motor. Pass to butterfly valve. Therefore, this function is used to suppress the abnormal rise of the cooling water temperature and perform a safety protection function to prevent the engine from overheating. Next, FIG. 7 shows Example 7. In addition, in FIG. 7, the parts corresponding to the already explained structures are denoted by the same reference numerals, and redundant descriptions are omitted. In the seventh embodiment of the present embodiment, a part which has a driving force to cut off the motor on the valve shaft that controls the opening and closing of the butterfly valve with the movement of the piston rod of the thermocouple is characterized in that the structure is to release the connection of the part. In this case, the butterfly valve is opened using a return spring. That is, "in Fig. 7", the snap ring 51 is arranged on the thermocouple 47 so as to surround the piston rod 47a buried in the thermoelectric power 47. A coil spring 52 'is disposed between the retaining ring 51 and the valve shaft 27B. The coil spring 52 is used to structurally bias the retaining ring 51 toward the thermocouple 47 side. On the buckle 51, a pair of rods 51a are integrally formed, and a pair of rods 51a can be slid along the shaft hole arranged in the valve shaft 27B in structure. On the end face of the valve shaft 27A and the pair of rods 51a, an engagement hole 27A1 to be engaged with the pair of rods 51a is drilled.

Page 17 4 17 006 V. Description of the invention (15) And 'in Fig. 7 (a) showing the state where the cooling water is in the specified temperature range', the piston rod 47a of the thermocouple 47 is buried, so the coil spring 52 The snap ring 51 is also pushed, and the pair of rods 51a constituting one of the coupling members is engaged with the engagement hole 27A1 formed in the valve shaft 27A. Therefore 'in this state, the valve shafts 27A and 27B are integrally rotated via the pair of rods 5 1 a constituting one of the coupling members. Therefore, in this state, by using the drive of the motor 29, the butterfly valve 26 can be opened and closed to ensure the normal temperature control of the cooling water. When the cooling water rises to a temperature higher than a specified value, the heat of the cooling water will be transmitted to the valve shaft 27A. The thermocouple 47 is heated. As described above, the thermocouple 47 is enclosed with < wax W ' as a thermal expansion material. Therefore, the piston rod 47a protrudes and becomes the state shown in FIG. 7 (b). That is, the retaining ring 51 and a pair of rods 5ia integrated with the retaining ring 51 cause the spring 52 to contract and move to the valve shaft 27B side. Therefore, the connection between "the disengagement of the pair of rods 51a and the engagement hole 27A1 formed in the valve shaft 27A" is released. Therefore, the butterfly valve 26 is opened by the action of the return spring 41 to perform a safety protection function to prevent the engine from overheating. Fig. 8 shows an eighth embodiment. In addition, in FIG. 8, the parts corresponding to the already explained structures are denoted by the same reference numerals, and redundant descriptions are omitted. In this embodiment 8, it is characterized in that a structure is used to sense a cooling water temperature abnormality (7K > shape) of a heat sensing element, such as a shape memory alloy formed in the shape of a coil spring, or using the heat of a bimetal The actuator uses the action of the thermal actuator to cut off the driving force of the motor on the valve shaft that controls the opening and closing of the flow control valve. The butterfly valve is opened by the return spring. That is, as shown in FIG. 8 The left half of the valve shaft 2? Forms an angle cylinder 27d,

417006 V. Description of the invention (16) The structure of the first helical gear 31 slides on the angle cylinder 27d, and can be combined in steering. In terms of structure, a coil spring 56 is arranged around the shaft between the approximately central portion of the valve shaft 27 and the first helical gear 31, and the first helical gear 31 and the second helical gear 32 are normally engaged. On the other hand, between the first helical gear 31 and the end of the valve shaft 27, a heat-operating member 55 using a coil-shaped shape memory alloy is arranged around the shaft. With such a structure, when the cooling water rises to a temperature higher than a predetermined value, the heat of the shape of the shape of the thermally actuating member 55 using the shape memory alloy is added through the valve shaft 27, and the thermally actuating member 55 is in the axial direction. The first helical gear 3i is extended axially by resisting the coil spring π. That is, the helical gear S1 is moved from the imaginary line as shown in the figure. This action is used to release the i-helical gear 3 i and the second helical gear 32. g) This 'butterfly 26' uses the rebound spring% to open the valve, and performs a safety protection function to prevent the engine from overheating. In this case, the same effect can be obtained by using a thermally actuating member using a bimetal instead of the thermally actuating member 55 of the shape memory alloy described above. In addition, the skin condition sensing or cooling water described above The difference between temperature 'But this is not limited to butterfly valves, other flow control results of cooling water flow. The example 'makes the butterfly valve open in accordance with the abnormal rise in electricity, which can be controlled by using the rotation of the valve shaft (the valve can also get the same effect, but the effect is not clear. The above is based on the application of car bows. V v, y., ^ Hand 疋 xiao examples are explained, but the present invention is limited to this specific, and is applied to the internal combustion engine containing the fairy + ^ ^ ^ meaning, and the same effect can be obtained.

4 17006 V. Description of the invention (17) The effect of the invention is learned from the above description. If the cooling control device of the internal combustion engine of the present invention is used because of its structure, in addition to ordinary operating circuits, it also senses electrical abnormalities. Forcing the cooling water flow control valve to be opened, for example, even if the motor that controls the opening and closing of the flow control valve cannot be driven due to an ECU failure, etc., it can prevent the internal combustion engine from being forced to overheat and other problems, and it can provide a reliable safety protection function. Because the cooling water flow control valve is forced to open according to the abnormal rise of the cooling water temperature, the forced driving mechanism and the flow control valve are integrated. Even in the same factory, the motor that controls the opening and closing of the flow control valve cannot be driven due to an ECU failure, etc. It can also prevent the internal combustion engine from being forced to overheat and other problems. It can play a reliable safety protection function. It can also provide a light, small and good flow control valve. "Simplified illustration of the drawing Figure 1 shows the cooling control device of the present invention The structure diagram of the first embodiment. Fig. 2 is a block diagram showing a second embodiment of a cooling control device according to the present invention. Fig. 3 is a structural diagram showing a third embodiment of a cooling control device according to the present invention. Fig. 4 is a block diagram showing a fourth embodiment of a cooling control device according to the present invention. Fig. 5 shows the structure of a fifth embodiment of a cooling control device of the present invention.

Page 20, AUOO ^ V. Description of the invention (18) Fig. 6 is a structural diagram showing a sixth embodiment of a cooling control device of the present invention. Fig. 7 is a block diagram showing a seventh embodiment of a cooling control device according to the present invention. Fig. 8 is a structural diagram showing an eighth embodiment of a cooling control device according to the present invention. Fig. 9 is a structural diagram showing an example of a cooling water circulation path and a cooling water flow control valve arrangement position of an internal combustion engine. Fig. 10 is a drawing showing an example of a conventional butterfly valve and its driving mechanism. DESCRIPTION OF SYMBOLS 11 Water jacket 14a, 14b, 14c Cooling water circuit 1 6 Bypass passage 1 9 Flow control valve 21 Control unit (ECU) 25 Housing 2 5 b Locating pin 26 Butterfly valve (27, 27A, 27B Valve shaft 27a pin 29 motor 29B clutch mechanism 29C reduction mechanism

V. Description of the invention (19) 31 1st helical gear 32 2nd helical gear 3 3 meter panel 3 4 level detection circuit 35 relay 38 2nd motor 41 return spring 42 thermal switch 4 5 spring member 47 thermocouple 47a Piston rod 51 Retaining ring 51a rod 5 5 Thermally actuated parts (shape memory alloy) E Internal combustion engine (engine) R Heat exchanger (radiator)

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Claims (1)

4Π〇06 6. Scope of patent application 1. A cooling control device for an internal combustion engine 'has a circulating flow path of cooling water arranged between the internal combustion engine and the heat exchanger, and controls the cooling water flowing from the internal combustion engine to the heat exchanger according to the degree of valve opening The flow control valve of the flow rate is characterized in that it includes: a control unit that sends out a motor-driven beacon in accordance with the operating state of the internal combustion engine, and the motor is driven in accordance with a motor body signal from the control unit; a flow control valve in accordance with the motor The driving force controls the degree of valve opening; and the electric control circuit, when an abnormality of the internal combustion engine is detected, forcibly drives the flow control valve in the direction of valve opening according to an electrical signal. 2. For example, the cooling control device for an internal combustion engine in the scope of patent application, wherein the electrical control circuit is configured to detect an abnormality of the internal combustion engine based on an electrical signal to 'cut off the connection circuit between the control unit and the motor and supply the motor Drive signal to open the flow control valve. 3. For example, the cooling control device of the internal combustion engine of the first patent application scope, which also has a second motor driving the flow control valve, and the electrical control circuit is configured to detect the abnormality of the internal combustion engine based on the electrical signal, and supply the | The second motor causes the drive signal to open the flow control valve. 4. For example, the cooling control device for an internal combustion engine in the scope of application for a patent, which also has a return spring that biases the flow control valve in the direction of opening the valve, and the sensed cooling water is used in the electrical control circuit to reach a specified value or more. After the water temperature is reached, the thermal switch is used to switch. Page 23 4, 70,06 6. The scope of the patent application '' After the connection circuit between the control unit and the motor is cut off, the flow control valve can be opened using the biasing force of the co-located spring. 5. If the cooling control device of the internal combustion engine of item 1 of the scope of patent application, it also has a return spring that biases the flow control valve in the valve opening direction and can control the connection and separation of the motor and the flow control valve according to the electrification number The f coupler mechanism 'and the electrical control circuit uses a thermal switch that performs a switching operation after sensing that the cooling water has reached a water temperature above a specified value, and the structure is released in accordance with the operation of the thermal switch after the clutch mechanism is used. The bias pressure of the return spring can open the flow control valve. ^ 6.—A cooling control device for an internal combustion engine, a flow control valve having a circulating flow path of cooling water disposed between the internal combustion engine and a heat-converter, and controlling a flow rate of the cooling water flowing from the internal combustion engine to a heat exchanger according to a valve opening degree It is characterized by comprising: a control unit 'sending a motor drive signal according to the operating state of the internal combustion engine; a motor' being driven Wj according to the motor drive signal from the control unit, a flow control valve, and controlling the valve opening degree according to the driving force of the motor ; And the strong pursuit mechanism is arranged in the flow control valve, and after detecting the abnormal temperature of the cooling water, the flow control valve is biased toward the opening direction. 7. The cooling control device for an internal combustion engine according to item 6 of the scope of patent application, wherein the forced driving mechanism comprises a spring member rolled on a valve shaft that controls the opening and closing of the flow control valve, and a spring member arranged on the valve shaft and connected to the spring member. Both ends ΑΠ006 Page 26