JP2001030740A - Heating apparatus serving as pump and variable restrictor mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heating apparatus also serving as a pump allowing selective use of its two function by intentionally adjusting between the heating function and the force feed function according to various external factors. SOLUTION: The heating apparatus 15 also serving as a pump is disposed in a cooling fluid circulation circuit of a liquid-cooled engine E. This device is provided with an auxiliary pump 30 for pressure feeding cooling fluid and a throttle 40 which can adjust the opening of a valve disposed on the downstream side. The opening of the throttle 40 is adjusted by an actuator controlled by a controller. The controller determines an appropriate opening of the throttle 40 based on the external information from various sensors.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pump / heating device and a variable throttle mechanism.

[0002]

2. Description of the Related Art Generally, in a vehicle air conditioning system, the amount of heat of a coolant (engine coolant) used for cooling an engine is used for heating. However, if the coolant has not yet been warmed, such as immediately after the start of the engine, it is difficult to secure sufficient heating capacity only with the engine waste heat. For this reason, an auxiliary heating device may be provided in the coolant circulation path for the purpose of quickly starting the heating capacity.

[0003] US Patent No. 3,720,372 discloses that
A turbine pump type auxiliary heating device (a so-called pump heater) is disclosed. Generally, in a pump heater, a pump work is given to a liquid to be pumped to increase internal energy, and as a result, the temperature of the liquid is raised (that is, heated).
The pump heater of the U.S. patent includes a control valve in the outlet passage of the pump, the control valve including a sensing member for sensing temperature and pressure inside the pump, and a valve body operatively connected to the sensing member. . Then, by appropriately positioning the valve body in accordance with the degree of increase in the temperature and pressure inside the pump and adjusting the opening of the pump outlet passage, the liquid heating capability of the pump heater is autonomously feedback-controlled.

[0004]

However, the control valve only suppresses the heat generation of the pump heater so that the coolant flowing through the pump heater does not exceed a predetermined threshold temperature or threshold pressure. In other words, in conventional pump heaters, the main purpose is to maintain the performance as a heating device at a constant level, and the pump-like function of pumping the liquid is merely an incidental operation that cannot be separated due to the principle of heat generation. Did not. At least in the conventional pump heater, there is no viewpoint of appropriately using the two functions (heating function and pumping function) of the pump heater according to external factors such as the condition of the vehicle. Absent. Further, even if attention is paid to the heating function, it is not intended to actively control the heat generation capability.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a pump / heating apparatus which intentionally adjusts between a heating function and a pumping function according to various external factors, and which can use both functions properly. is there. Another object of the present invention is to provide a variable throttle mechanism applicable to such a pump and heating system.

[0006]

According to the present invention, there is provided a pump / heating device provided in a coolant circulation circuit of a liquid-cooled engine, wherein the mechanical pumping means pumps the coolant.
A throttle valve provided on the downstream side of the pumping means and capable of adjusting a valve opening degree, an actuator for adjusting the opening degree of the throttle valve, information collecting means for obtaining external information necessary for control, and the information collecting means A control device for determining an appropriate opening of the throttle valve based on external information provided from the means, and controlling the actuator to adjust the valve opening of the throttle valve to the valve opening. .

According to this pump / heating device, the heat generation principle itself is not different from that of the conventional pump heater, but by adjusting the opening of the throttle valve by external control using a control device and an actuator, Unprecedented flexible usage, such as increasing the function of a pump by suppressing the function as a heating device, becomes possible. That is, by adding an external control means to the throttle valve whose valve opening can be adjusted, the function ratio between the heat generation function and the pumping function can be controlled, and in fact, one of the two functions can be changed according to the circumstances. The user is given the freedom to select functions.
Therefore, according to this configuration, intentional adjustment between the heating function and the pumping function can be achieved according to various external factors, and the two functions can be selectively used.

[0008] Claim 2 restricts that a vortex pump is preferable as the mechanical pumping means. By using such a pump, it is possible to secure a sufficient amount of heat generated when functioning as a heating device.

A third aspect of the present invention specifically specifies a control method of a function ratio between the heat generation function and the pressure feeding function. That is, the control device detects the excess or deficiency of the heat amount in the coolant circulation circuit based on the external information, and if the heat amount is in a shortage tendency, reduces the opening of the throttle valve to reduce the heating function of the pump / heating device. On the contrary, the pumping function is suppressed while the amount of heat is excessively increased. Conversely, when the amount of heat tends to be excessive, the opening degree of the throttle valve is increased to relatively increase the pumping function of the pump and heating device, while suppressing the heating function. I do.

[0010] The fourth aspect refers to a control method in a case where the engine load is considered as external information under special circumstances in which the mechanical pumping means is driven by power supply from the engine. That is, the control device detects the load state of the engine based on the external information, and when the engine load needs to be reduced, increases the opening of the throttle valve regardless of whether the amount of heat in the coolant circulation circuit is excessive or insufficient. . Increasing the throttle valve opening reduces the amount of work to be provided to increase the internal energy of the coolant, and also reduces the power that the engine must supply to drive the mechanical pumping means, reducing engine load. Is achieved.

A fifth aspect of the present invention relates to a variable throttle mechanism which is to be provided downstream of a mechanical pumping means for a cooling liquid constituting the circulation circuit in a cooling liquid circulation circuit of a liquid-cooled engine. The technical significance is the same as that of the first aspect. Accordingly, claims 2 to 4 may be made as necessary.
It should be understood that the correction combining the technical matters described in the above with claim 5 is naturally allowed.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to a vehicle air conditioning system will be described. FIG. 1 conceptually shows a circuit for circulating a coolant of a liquid-cooled engine E. Engine E
Is provided with a water jacket WJ and a water pump WP for pumping the coolant to the jacket. The coolant (engine coolant) is an antifreeze made of, for example, water and ethylene glycol. This coolant circulation circuit includes a radiator 11, a thermostat valve 12, a heater core 13, an electromagnetic valve 13a, a check valve 1 in addition to the engine E.
4 and a pump / heating device 15 and a plurality of pipes 21 to 25 connecting them. These pipes are three pipes 2 downstream of the water jacket WJ.
1, 22, 23, and two pipes 24, 25, which are upstream of the water jacket WJ. Piping 24
Constitutes an inflow-side circuit or path returning to the water pump WP via the radiator 11 and the thermostat valve 12. The pipe 25 constitutes an inflow-side circuit or path that returns to the water pump WP via the electromagnetic valve 13a and the heater core 13. The pipe 21 constitutes a circuit or a path on the outflow side from the water jacket WJ to the thermostat valve 12. That is, the thermostat valve 12 is provided at a branch point between the pipe 21 and the pipe 24. Piping 22
Constitutes a circuit or a path on the outflow side that connects the water jacket WJ to the two pipes 24 and 25 via the check valve 14. The pipe 23 constitutes a circuit or a path on the outflow side that connects the water jacket WJ to both the pipes 24 and 25 via the pump / heating device 15. Piping 22 and 2
Reference numeral 3 denotes a parallel relationship between the water jacket WJ and the pipes 24 and 25.

The water pump WP is operatively connected to the crankshaft (output shaft) of the engine E via a V-belt or the like, and operates using the driving force of the engine. The water pump WP disposed near the inlet of the water jacket WJ pumps the coolant returning via the pipes 21, 24, 25 into the water jacket WJ. This pumping force is the main driving force when the coolant flows through the circulation circuit.

The radiator 11 functions as a heat exchanger for radiating heat from the coolant to the outside air. Thermostat valve 12
Detects the temperature of the coolant flowing from the engine E via the pipe 21 or 24, and connects one of the pipes 21 and 24 to the water pump WP according to the detected temperature. That is, when the temperature detected by the thermostat valve 12 is lower than the set temperature (for example, 80 ° C.), the pipe 21 is connected to the water pump WP to short-circuit the coolant circulation circuit, and the temperature of the coolant due to engine waste heat is increased. Aim. On the other hand, when the temperature detected by the thermostat valve 12 is equal to or higher than the set temperature, the short circuit through the pipe 21 is stopped by connecting the pipe 24 to the water pump WP, and the temperature of the coolant is reduced. In other words, the thermostat valve 12 selectively allows the coolant flowing through the circulation circuit to pass through the radiator 11 using the temperature as an index so that the coolant temperature can be maintained near the set temperature. The radiator 11, the thermostat valve 12, and the pipe 24 constitute an engine cooling circuit for selectively cooling the coolant together with other circuit elements and pipes.

The heater core 13 functions as a heating heat exchanger that warms the air in the vehicle cabin by using the amount of heat of the coolant flowing through the pipe 25. The electromagnetic valve 13a is an ON / OF that controls supply and cutoff of a coolant from the engine E to the heater core 13 in accordance with a state of cooling and heating of the vehicle air conditioning system.
This is an F valve (simple on-off valve). In addition, the heater core 13, the electromagnetic valve 13a, and the piping 25 constitute a heating circuit of a vehicle air conditioning system together with other circuit elements and piping.

The check valve 14 allows only the flow in the outflow direction from the water jacket WJ toward the pipes 24 and 25. The check valve 14 mainly opens when the amount of outflow through the pipe 23 is greatly reduced under a situation where the outflow through the pipe 21 is stopped by the thermostat valve 12 (that is, when the radiator 11 is effective). The circulation of the coolant in the pipes 24 and / or 25 is always ensured.

As shown in FIG. 1, the pump / heating device 15 includes an auxiliary pump 3 provided in series along a pipe 23.
0 and a throttle valve 40. Then, by the cooperation of the two, the two functions can be simultaneously (or selectively) exhibited while balancing the functions of the pump and the functions of the heating device. In addition, the auxiliary pump 30 is positioned as a mechanical pumping means.

FIGS. 2A and 2B show an example of the internal structure of the auxiliary pump 30. FIG. The structure shown in FIG. 2 is well known as a typical internal structure of a pump heater. As shown in FIGS. 2A and 2B, the pump housing 3
A substantially annular working chamber 32 is defined in 1. The working chamber 32 is connected to an upstream portion of the pipe 23 via an introduction port 33 and is connected to a downstream portion (or a throttle valve 40) of the pipe 23 via an outlet port 34. Working chamber 32
Inside, an integrated drive shaft 35 and rotor 36 are rotatably disposed. A plurality of recesses or grooves 36a are formed on the front and rear end surfaces of the rotor 36. A pulley 37 is fixed to an end of the drive shaft 35 outside the pump housing 31, and the pulley 37 is operatively connected to a crankshaft (output shaft) of the engine E via a V-belt (not shown) or the like. Therefore, as long as the drive shaft 35 and the rotor 36 rotate using the driving force of the engine E, the coolant introduced from the introduction port 33 circulates through the working chamber 32 to the outlet port 34 due to its pumping action. Is done. In this sense, the auxiliary pump 30 has a pump function similar to that of the water pump WP, and can serve as an auxiliary pump that assists the water pump WP.

Further, the auxiliary pump 30 functions not only as a pump but also as a heating device. The reason is that, for example, the difference between the inner diameter of the working chamber 32 and the outer diameter of the rotor 36 is set so that work can be applied to the coolant in the working chamber 32 when the rotor 36 rotates to generate heat due to an increase in internal energy. This is because such a configuration is employed that a gap is formed between the members or parts constituting the flow path of the cooling liquid, which becomes a flow resistance, such as miniaturization. For this reason, the power externally applied to the drive shaft 35 and the rotor 36 is converted into the work that the rotor 36 performs for forcibly pumping the coolant and the heat generated as a result of the power loss. As shown in FIG. 2A, a region obtained by combining the groove 32a having a semicircular cross section defined by the curved inner wall surface of the working chamber 32 facing the rotor 36 and the groove 36a of the rotor. A secondary vortex of the coolant can be generated before and after the rotating rotor 36 as shown by the arrows. This secondary vortex flows between the outlet port 34 side and the inlet port 3
It helps to create a pressure difference between the three sides. Then, the internal leakage (internal leakage) of the coolant from the relatively high-pressure outlet port 34 toward the relatively low-pressure inlet port 33 causes heat generation in the pump 30 to be promoted.

In the auxiliary pump 30, it is certain that the greater the rotation speed (rotation speed) of the rotor 36, the greater the absolute values of the pumping action and the heating action of the coolant. However, the pump 30 merely exerts a pumping action and a heat generating action of the coolant in accordance with the rotation speed of the rotor 36, and the pump alone determines the ratio (functional ratio) between the pumping action and the heating action at the same rotation speed. It cannot be changed. The throttle valve 40 provided downstream of the pump outlet port 34 realizes a change in the ratio between the pumping action and the heat generating action in the entire pump / heating device 15.

FIG. 3 shows a throttle valve 40 which is a component of the pump / heating device 15 and a control structure thereof. Note that the liquid columns before and after the throttle valve shown in FIG. 3 conceptually show that a pressure difference may occur before and after the throttle valve 40, and such two liquid columns do not actually exist. .

The throttle valve 40 is an opening control valve provided in the middle of the pipe 23 and capable of arbitrarily adjusting the opening of the pipe (that is, the valve opening). FIGS. 4 and 6 show specific examples of valves that can be used as the throttle valve 40. FIGS. 4A and 4B show a partition valve whose valve opening can be adjusted by moving the partition plates 41 and 42. 4A shows a case where the pipe 23 is a cylindrical pipe, and FIG. 4B shows a case where the pipe 23 is a square pipe. In such a partition valve, the lift amount L of the partition plate 41 or 42 is set to the diameter D of the pipe 23 along the moving direction of the partition plate.
Or the value obtained by dividing by the maximum lift amount corresponding to one side length S (L /
The valve opening can be expressed by D) or (L / S). FIG. 6 (A)
(B) shows a rotary valve whose valve opening can be adjusted by rotating the rotary valve bodies 43 and 44. FIG. 6A shows the case of a butterfly valve, and FIG. 6B shows the case of a rotary cock valve. In such a rotary valve, the valve opening can be expressed by an angle θ between the axis C of the pipe 23 and the axis of the valve element 43 or 44. For example, when θ = 0 degrees (deg), the valve opening becomes 100% (fully open), and when θ = 80 degrees (deg), the valve opening becomes 0.
% (Fully closed).

As shown in FIG. 3, the throttle valve 40 is operatively connected to an actuator 45. The actuator 45 drives the partition plates 41 and 42 or the valve bodies 43 and 44 to change the lift amount L of the partition plate or the angle θ of the valve body. The actuator 45 is connected to the control device 47 via a drive circuit 46A. Also, the electromagnetic valve 13
a is also connected to the control device 47 via the drive circuit 46B.

The control unit 47 is a control unit that controls the overall control of the vehicle air conditioning system. The control device 47 calculates the optimum value of the lift amount L of the partition plate or the angle θ of the valve body based on the external information provided from the information collecting means 48 and controls the throttle valve 40 to the optimum opening degree. The opening and closing of the electromagnetic valve 13a is controlled. The information collecting means 48 is a general term for various sensors and switches, and includes, for example, a rotation speed sensor and a temperature sensor. Information collecting means 48
The external information provided to the control device 47 includes the engine speed, the coolant temperature, the vehicle interior temperature, the set temperature of the temperature setting device, the ON / OFF setting status of the air conditioning system switch, and the like.

As described above, the auxiliary pump 30 has a heat generating function. In cooperation with the pump 30, heat is generated also in the throttle valve 40. The following equation 1 represents the theoretical heating value Q _v of the throttle valve 40.

[0026]

(Equation 1) Here, ρ is the density of the cooling liquid, g is the gravitational acceleration, h is the loss head (see FIG. 3), and q is the flow rate (m ³ / s) of the cooling liquid passing through the throttle valve. The loss head h corresponding to the pressure difference before and after the throttle valve is expressed by the following equation (2).

[0027]

(Equation 2) Here, V represents the flow rate (m / s) of the cooling liquid, A represents the cross-sectional area (m ² ) of the pipe 23, and ζ (zeta) represents the loss factor. The loss coefficient ζ is a proportional constant unique to each throttle valve determined by the type and shape of the throttle valve. In other words, the loss coefficient ζ is given for each throttle valve shown in FIGS. ζ is generally found by experiment. By substituting equation (2) into equation (1) and rearranging, the theoretical heating value Q _v is as shown in equation (3).

[0028]

(Equation 3) Based on the formula above theoretical calorific value Q _v, for each throttle valve, simulation results of the relationship between the valve opening and the amount of heat generated by the computer is a graph of FIG. 5 and FIG.

The white circle plot in FIG. 5 shows the case of the gate valve of FIG. 4A, and the black circle plot shows the case of the gate valve of FIG. 4B. According to the results of FIG. 5, when the gate valve is used as the throttle valve 40, L / D or L / S representing the valve opening is set to approximately 0.4 (more preferably 0.2) as a boundary value. A remarkable heat-generating effect when it is on the closed side (ie, a side with a smaller lift amount L), and hardly exhibits a heat-generating effect when it is on an open side (ie, a side with a larger lift amount L) than the boundary value. I understand.

The black triangle plot in FIG. 7 is shown in FIG.
And the white square plot shows the case of the rotary cock valve of FIG. 6 (B). According to the result of FIG.
When a rotary valve is used as 0, the angle θ representing the valve opening is used.
With approximately 40 degrees (more preferably 60 degrees) as the boundary,
A remarkable heat-generating effect is exhibited when it is on the closed side (ie, the side with a large angle θ), and hardly on the open side (ie, a side with a small angle θ) than the boundary angle. You can see that.

The graph of FIG. 8 shows a heating device that also serves as a pump.
15 and the flow rate q of the cooling liquid flowing through the
Total calorific value Q_TThe concept is shown conceptually. According to FIG.
If the flow rate qB is the boundary,_TThe trend changes. That is,
In the region where the flow rate is larger than qB, the flow rate q and the total heat generation Q_T
Has a linear inverse correlation. In this multi-flow area,
Total heat Q with pump 30 alone_TEarn most of the.
On the other hand, in the region where the flow rate is smaller than qB,
Deviate from the linear relationship and add the heat value ΔQ
Total calorific value Q_TIncrease is seen. In this low flow rate region,
The amount of heat generated by the throttle valve 40 is visually evident from the amount of heat generated by the pump 30.
The increase amount ΔQ is determined by the throttle valve 4
It can be said that this is the contribution of 0 alone. By the way, the total
Heat value Q _TThe ratio of the increase amount ΔQ to the
It was about.

Next, an outline of the control of the pump / heating device 15 by the control device 47 will be described. (Case 1): When the engine E is idling,
As such, the rotation speed of the water pump WP is also low. Under normal climatic conditions, there is no problem. However, during the daytime when the temperature is quite high in summer, the circulation flow rate of the cooling water by the water pump WP is eventually insufficient, and the engine is overheated. I am worried about the situation. In such a case, the control device 47 causes the pump / heating device 15 to mainly function as an auxiliary pump (second water pump). Specifically, the control device 47 determines a possibility that the main water pump WP is in a capacity shortage state based on external information such as an engine speed and a coolant temperature. When it is determined that the water pump WP is in the insufficient capacity state, the actuator 45 is controlled so that the throttle valve 40 is fully opened. Thereby, the throttle valve 40
Is suppressed, and the flow rate q is small during idling rotation, and the heat generated by the auxiliary pump 30 is negligible. Therefore, the pump / heating device 15 almost functions as an auxiliary pump. In this case, the electromagnetic valve 13a is closed, and the thermostat valve 12 is connected to the pipe 24.
To the water pump WP. Therefore, the cooling liquid is mainly water jacket WJ → pipe 23 (and pump / heating device 15) → pipe 24 (and radiator 11) →
Circulates in the path of the water pump WP.

(Case 2): Immediately after starting the engine in winter or in a cold region, it is difficult to raise and maintain the temperature of the coolant to a set temperature (for example, 80 ° C.) only by waste heat of the engine. In such a case, the control device 47 causes the heating device for pump 15 to function mainly as an auxiliary heating device. Specifically, the control device 47 determines the temperature of the cooling liquid,
It is determined that the heat generation capability of the entire air conditioning system may be in an insufficient state in response to the heating request. Then, when it is determined that the heat generation capacity is insufficient, the actuator 45 is feedback-controlled so that the opening of the throttle valve 40 becomes the optimal throttle amount in accordance with the degree of the shortage. As a result, the heating effect of the throttle valve 40 is developed, and the auxiliary pump 30
Since the heat generation effect due to the internal leakage in the pump also increases, the pump / heating device 15 strengthens its character as an auxiliary heating device,
Contributes to heat replenishment. If the amount of waste heat supplied from the engine increases, it goes without saying that the opening degree of the throttle valve 40 is increased and the function of the pump-and-heating device 15 as an auxiliary heating device is weakened. In this case, the electromagnetic valve 13a is opened, and the thermostat valve 12 is connected to the pipe 21.
To the water pump WP. Therefore, most of the coolant is supplied to the water jacket WJ → the pipe 23 (and the pump / heating device 15) → the pipe 25 (and the heater core 13) →
While circulating on the path of the water pump WP, a part of the coolant circulates on the path of the water jacket WJ → pipe 21 → water pump WP.

(Case 3): There is a case where it is desired to temporarily reduce the load when the engine E drives accessories (the pump / heating device 15 is one of the accessories). For example, when starting the engine with a starter motor, or when accelerating a vehicle such as overtaking acceleration. When the opening of the throttle valve 40 is reduced in the pump / heating device 15, the auxiliary pump 30
The power required to drive the rotor 36 is also increased. Therefore, when it is necessary to temporarily reduce the engine load, that is, when the reduction of the engine load is the highest priority, the control device 47 controls the actuator 45 to forcibly and fully open the throttle valve 40. In this case, the cooling liquid may be circulated through either the pipe 24 or the pipe 25.

(Effects) According to the present embodiment, the following effects can be obtained. ○ By adjusting the opening of the throttle valve 40 by external control using the control device 47 and the actuator 45, the function as a heating device can be suppressed and the function like a pump can be increased, enabling a more flexible use than ever before. Become.

(2) The external ratio of the throttle valve can be controlled externally to control the function ratio between the heat generation function and the pumping function in the pump / heating device 15, and in fact, one of the two functions can be changed according to the circumstances. Can be selected (giving the freedom of function selection). Therefore, intentional adjustment between the heating function and the pressure feeding function can be achieved according to external factors, and both functions can be used properly.

(Another Example) The embodiment of the present invention may be modified as follows. ○ In the coolant circulation circuit of FIG.
P may be omitted and the pump 30 may serve as a main water pump.

(1) The pump 30 may be removed from the circulation circuit of FIG. 1 and the throttle valve mechanism may be constituted only by the throttle valve 40.
In this case, the water pump WP will be indispensable as a pump that generates the driving force for pumping the coolant.

(Points of technical idea other than those described in each claim) In the above-mentioned claims, the throttle valve is a partition valve whose valve opening can be adjusted by moving a partition plate.

The throttle valve according to any one of claims 1 to 5, wherein the throttle valve is a rotary valve whose valve opening can be adjusted according to an angle of a valve body.
More preferably, it is a butterfly valve. In particular, according to the butterfly valve, fine adjustment of the opening degree is also possible.

[0041]

According to the heating device combined with the pump and the variable throttle mechanism of the present invention, the heating function and the pumping function can be intentionally adjusted according to various external factors, and both functions can be used properly. Becomes

[Brief description of the drawings]

FIG. 1 is a schematic plan view of a coolant circulation circuit in a vehicle air conditioning system.

FIG. 2 is a sectional view showing a longitudinal section and a transverse section of the pump.

FIG. 3 is a schematic diagram showing a throttle valve and a control configuration thereof.

FIG. 4 is a sectional view showing an example of a partition plate type throttle valve.

FIG. 5 is a graph showing a relationship between a lift ratio of a partition plate and a calorific value at a throttle valve.

FIG. 6 is a sectional view showing an example of a rotary throttle valve.

FIG. 7 is a graph showing the relationship between the angle of a valve body and the amount of heat generated by a throttle valve.

FIG. 8 is a graph showing a relationship between a flow rate and a total calorific value in a pump / heating device.

[Explanation of symbols]

15: Pump / heating device, 30: Pump (mechanical pumping means), 32: Working chamber, 36: Rotor, 40: Throttle valve,
45 ... actuator, 47 ... control device, 48 ... information collecting means, E ... engine (external drive source), WP ... water pump.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI theme coat ゛ (Reference) F01P 5/10 F01P 5/10 B 7/14 7/14 Z 7/16 504 7/16 504E 9/00 9/00 F04B 49/06 321 F04B 49/06 321Z (72) Inventor Masami Niwa 2-1-1 Toyota-cho, Kariya-shi, Aichi Prefecture Inside Toyota Industries Corporation (72) Inventor Tatsuyuki Hoshino Toyota, Kariya-shi Aichi Prefecture 2 chome, 1-cho F-term in Toyota Industries Corporation (reference) 3H045 AA05 AA10 AA12 AA23 BA31 CA09 CA19 CA21 CA24 CA29 DA16 DA19 EA34

Claims (5)

[Claims] 1. A pump / heating device provided in a coolant circulation circuit of a liquid-cooled engine, comprising: mechanical pumping means for pumping a coolant; and a valve provided on a downstream side of the pumping means. A throttle valve capable of adjusting the degree, an actuator for adjusting the opening of the throttle valve, an information collecting means for obtaining external information necessary for control, and the throttle based on external information provided from the information collecting means. A control device for determining an appropriate opening of the valve and controlling the actuator to adjust the opening of the throttle valve to the opening of the valve; 2. The mechanical pumping means includes a working chamber and a rotor provided in the working chamber. When the cooling fluid taken into the working chamber by the rotation of the rotor is pumped toward the throttle valve, The pump / heater according to claim 1, wherein the vortex pump is capable of generating heat based on power loss. 3. The control device detects, based on the external information, whether the amount of heat in the coolant circulation circuit is excessive or deficient. While the heating function of the heating device is relatively increased, the pumping function is suppressed, and conversely, when the amount of heat tends to be excessive, the opening of the throttle valve is increased to relatively increase the pumping function of the pump / heating device. The pump / heating device according to claim 1 or 2, wherein the heating function is suppressed while increasing the temperature. 4. The mechanical pumping means is driven by power supply from an engine, and the control device detects a load state of the engine based on the external information, and when it is necessary to reduce the engine load, The pump / heating device according to any one of claims 1 to 3, wherein the degree of opening of the throttle valve is increased regardless of whether the amount of heat in the coolant circulation circuit is excessive or insufficient. 5. A variable throttle mechanism which is to be provided downstream of a mechanical pumping means for a cooling liquid constituting the circulation circuit in a coolant circulation circuit of a liquid-cooled engine, wherein the valve opening degree can be adjusted. A throttle valve, an actuator for adjusting the opening of the throttle valve, an information collecting unit for obtaining external information necessary for control, and an appropriate information of the throttle valve based on the external information provided from the information collecting unit. A variable throttle mechanism comprising: a controller that determines an opening degree and controls the actuator to adjust the valve opening degree of the throttle valve to the valve opening degree.