JP2007285141A - Support structure for exhaust heat recovery system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a support structure for an exhaust heat collection device capable of reducing the number of components and simplifying its structure and improving flexibility in a piping layout. <P>SOLUTION: Horizontal sections 52a and 53a extending along a device body 51 are respectively provided on an inflow pipe 52 and discharging pipe 53 in which cooling water is circulated by connecting with the device body 51 of the exhaust heat collection device 5. The horizontal sections 52a and 53a are elastically supported on body side support members 81 and 82 extending downward from a body floor panel via support rubbers 91 and 92. Thus, the inflow pipe 52 and discharging pipe 53 can serve a function as a conventional support bracket, and the support bracket becomes not necessary. The flexibility in a piping layout can be improved since the inflow pipe 52 and discharging pipe 53 are not restrained by the support bracket as a connection location any more. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a support structure for an exhaust heat recovery device that is used, for example, when recovering exhaust heat of an engine for heating a vehicle interior of an automobile. In particular, the present invention relates to measures for improving the flexibility of piping layout.

  Conventionally, as disclosed in, for example, Patent Document 1 and Patent Document 2 below, it is known to recover the heat of exhaust gas from an automobile engine and use it for heating in a vehicle interior. In this case, an exhaust heat recovery device (also referred to as an exhaust heat recovery device) is attached in the middle of the exhaust pipe and a cooling water pipe through which engine cooling water flows is connected to the exhaust heat recovery device. As a result, heat exchange is performed between the exhaust gas and the engine coolant in the exhaust heat recovery device, and the exhaust heat recovered by the engine coolant is used for heating the vehicle interior. Further, the engine warm-up operation is completed early by recovering exhaust heat when the engine is cold (for example, at the initial start of the engine) and rapidly increasing the coolant temperature.

  The support structure for this type of exhaust heat recovery device will be described in detail. FIG. 5 shows a conventional structure in which the exhaust heat recovery device a is suspended and supported on the lower side of the floor panel of the vehicle body. FIG. 5 (a) is a plan view and FIG. 5 (b) is a side view. The left side in the figure is the front of the vehicle body. As shown in these drawings, the exhaust heat recovery device a has support brackets c and d projecting from left and right side surfaces of a substantially cylindrical device body b, and these support brackets c and d are arranged on the vehicle body side (for example, The body side support members e and f (not shown in FIG. 5A) extending from the floor panel are elastically supported via support rubbers g and h. In the case shown in FIG. 5, the left and right support brackets c and d projecting from the apparatus main body b are located on the vehicle body left side (front side in FIG. 5B) on the vehicle body front side. It is bent and a support rubber g is attached to the horizontal part. On the other hand, the right side of the vehicle body (the back side in FIG. 5B) extends rearward of the vehicle body, then bends forward, and a support rubber h is attached to the horizontal portion.

Further, a cooling water inflow pipe i and a cooling water discharge pipe j through which engine cooling water flows are connected to the apparatus main body b. The connection positions of the pipes i and j to the apparatus main body b are such that when air is mixed in the pipes i and j or the apparatus main body b, the air is quickly discharged toward the radiator side. The cooling water inflow pipe i is set at a relatively lower position of the apparatus main body b, and the cooling water discharge pipe j is set at a relatively upper position of the apparatus main body b. In the case shown in FIG. 5, the cooling water inflow pipe i is inclined downward from the relatively lower position of the apparatus main body b toward the front of the vehicle body, and then extends horizontally toward the front of the vehicle body. Yes. On the other hand, the cooling water discharge pipe j extends upward from a relatively upper position of the apparatus main body b, then wraps around the side of the apparatus main body b, extends downward, and then upwards toward the rear of the vehicle body. It is inclined.
Japanese Utility Model Publication No. 5-56514 Japanese Patent Laid-Open No. 9-76739

  As described above, in the conventional exhaust heat recovery apparatus, at least a pair of support brackets c and d are projected from the apparatus body b, and the cooling water inflow pipe i and the cooling water discharge pipe j are connected to each other. ing. For this reason, the number of parts of the exhaust heat recovery device a is large and the configuration is complicated. In addition, since the connection positions of the cooling water inflow pipe i and the cooling water discharge pipe j cannot be set at the projecting positions of the support brackets c and d, the degree of freedom in designing the pipe connection position is sufficiently high. I couldn't say that. For example, the projecting position of the support brackets c and d for stably supporting the apparatus main body b is preferably in the vicinity of the center of gravity of the apparatus main body b. The support brackets c and d, the support rubbers g and h, and the body side support members e and f are arranged. In this case, the cooling water inflow pipe i and the cooling water discharge pipe j are connected to one side of the apparatus body b in the front-rear direction. It will be possible to connect only to the position that is offset to the side. That is, the position where the cooling water inflow pipe i and the cooling water discharge pipe j can be connected to the apparatus main body b is greatly restricted, and the degree of freedom of the piping layout is low.

  The present invention has been made in view of the above points, and an object of the present invention is to reduce the number of parts and simplify the configuration and to obtain a high degree of freedom in piping layout. It is to provide a support structure.

-Principle of solving the problem-
The solution principle of the present invention devised to achieve the above object is that the apparatus is connected to a cooling water inflow pipe and a cooling water discharge pipe through which cooling water (heat recovery medium) flows and is connected to the apparatus main body of the exhaust heat recovery apparatus. A function as a member for supporting the main body on the vehicle body (hanging base) is also used.

-Solution-
Specifically, the present invention relates to an apparatus main body provided with a heat exchanging means for exchanging heat between an exhaust gas of an internal combustion engine and a heat recovery medium, an inflow pipe for flowing the heat recovery medium into the apparatus main body, A support structure for suspending and supporting an exhaust heat recovery apparatus having a discharge pipe for discharging a recovery medium from the apparatus main body with respect to a suspension base is assumed. At least one of the inflow pipe and the exhaust pipe is supported by a support member extending from the suspension base with respect to the support structure of the exhaust heat recovery apparatus.

  Because of this specific matter, at least one of the inflow pipe and the exhaust pipe also functions as a conventional support bracket, and thus this support bracket is unnecessary. That is, the connection position of the inflow pipe and the exhaust pipe to the apparatus main body is not restricted by the support bracket, and the degree of freedom of the piping layout can be increased. In addition, by eliminating the support bracket, the cost of the exhaust heat recovery device can be reduced, the number of parts can be reduced, and the configuration can be simplified.

  More specifically, the following structure is exemplified as the suspension support structure of the exhaust heat recovery apparatus. The support members extending from the suspension base are referred to as an inflow pipe support member and a discharge pipe support member. The inflow pipe is supported with respect to the inflow pipe support member via the elastic body, while the discharge pipe is supported with respect to the discharge pipe support member via the elastic body.

  By this specific matter, both the inflow pipe and the exhaust pipe can be used as a function of a conventional support bracket, so that the degree of freedom in piping layout can be further increased. In addition, since the inflow pipe and the discharge pipe are elastically supported by the elastic body, vibration (vehicle body vibration) from the suspension base is difficult to be transmitted, and adverse effects on each pipe due to vibration are suppressed.

  Examples of the configuration for obtaining high suspension support strength of the apparatus main body by the inflow pipe and the discharge pipe include the following. First, it is the structure which provided the reinforcement member which connects between the outer peripheral surface of these pipe | tubes, and the outer surface of an apparatus main body in the connection part of the inflow tube and discharge pipe with respect to an apparatus main body.

  Further, the inflow pipe and the discharge pipe are provided with a parallel portion extending substantially parallel to the extending direction of the outer surface of the apparatus main body, and the parallel portion and the outer surface of the apparatus main body are connected by a connecting member.

  According to these configurations, since the inflow pipe and the discharge pipe can be firmly fixed to the outer surface of the apparatus main body, the function as a conventional support bracket can be sufficiently obtained in these pipes, and the apparatus main body is suspended. Lowering support strength can be secured high.

  In the present invention, an inflow pipe and a discharge pipe connected to the apparatus main body of the exhaust heat recovery apparatus and through which the heat recovery medium circulates also function as a member for supporting the apparatus main body on the suspension base. For this reason, the conventional support bracket can be made unnecessary, and the support bracket is not restricted by the connection position of the pipe, and the degree of freedom of the pipe layout can be increased.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the present embodiment, the case where the present invention is applied as an exhaust heat recovery device for an automobile engine will be described.

(First embodiment)
-Cooling water circulation path-
FIG. 1 is a circuit diagram showing an outline of a cooling water circulation path in the engine according to the present embodiment. As shown in FIG. 1, the cooling water circulation path includes a radiator 1, a thermostat 2, a water pump 3, a heater core 4, an exhaust heat recovery device 5 that is a feature of the present embodiment, and each of these devices 1, 2, Pipes for connecting 3, 4 and 5 and hoses H1, H2, H3, H4, H5 and H6 are provided.

  Specifically, the lower tank 11 and the thermostat 2 of the radiator 1 are connected by a lower hose H1, and the discharge port of the water pump 3 communicates with a water jacket 6 formed in the engine body E. In this water jacket 6, the cooling water (heat recovery medium) from the water pump 3 passes through the water jacket 61 on the cylinder block side and is then introduced into the water jacket 62 on the cylinder head side, and then the engine body E is taken out by the take-out pipe H2. Taken from. The take-out pipe H2 is branched, one is connected to the exhaust heat recovery device 5 by an introduction hose H3, and the other is connected to the upper tank 12 of the radiator 1 by an upper hose H4. The exhaust heat recovery device 5 and the heater core 4 are connected by a heater introduction hose H5, and the heater core 4 and the suction side of the water pump 3 are connected by a heater discharge hose H6.

  Hereinafter, the configuration and function of each device constituting the cooling water circulation path will be briefly described.

  The radiator 1 in the present embodiment is of a down flow type, and a radiator core 13 is provided between the upper tank 12 and the lower tank 11. As a result, the cooling water recovered from the engine body E through the upper hose H4 to the upper tank 12 flows between the outside air (air flow by driving air and driving of the cooling fan) when flowing down the radiator core 13 toward the lower tank 11. The cooling water is cooled by exchanging heat and releasing heat to the outside air. A radiator cap 14 is detachably attached to the upper tank 12. The radiator cap 14 has a function of increasing the heat exchange efficiency in the radiator core 13 by increasing the boiling point of the cooling water by maintaining the internal pressure of the cooling water circulation path at atmospheric pressure or higher. Further, the radiator cap 14 is removed from the upper tank 12 when water is poured into the cooling water circulation path or when air is released from the cooling water circulation path. As a result, the water inlet of the radiator 1 is opened and the cooling water circulation path communicates with the atmosphere.

  The thermostat 2 adjusts the temperature of the cooling water by switching the water path of the cooling water circulation path. For example, the thermostat 2 uses the thermal expansion of wax sealed inside, and the valve provided in accordance with the temperature of the cooling water. A mechanism to be opened and closed is provided. When the engine body E is cold, that is, when the cooling water temperature is relatively low, the valve of the thermostat 2 is closed to shut off the water path between the lower tank 11 of the radiator 1 and the water pump 3, and the radiator The warm-up operation of the engine body E can be completed at an early stage by not allowing the coolant to flow through 1. On the other hand, after the engine body E has been warmed up, that is, when the cooling water temperature is relatively high, the valve of the thermostat 2 is opened, and the water channel between the lower tank 11 of the radiator 1 and the water pump 3 is opened, By flowing a part of the cooling water through the radiator 1, the heat recovered by the cooling water is released to the atmosphere by the radiator 1.

  The water pump 3 is for generating a water flow in the cooling water circulation path, and a transmission belt is stretched between a water pump pulley and a crankshaft pulley provided on the drive shaft. It is driven by the rotational force of the crankshaft.

  The heater core 4 is for heating the passenger compartment by using the heat of the cooling water, and faces the air duct of the air conditioner. In other words, the air-conditioned air flowing in the air duct is passed through the heater core 4 and supplied to the vehicle interior as warm air when heating the vehicle interior, while the air-conditioned air bypasses the heater core 4 in other cases (for example, during cooling). ing.

-Cooling water circulation operation and exhaust heat recovery operation-
Next, the circulating operation of the cooling water and the exhaust heat recovery operation performed by the exhaust heat recovery device 5 will be described.

  First, when the engine is cold, such as at the initial start of the engine, the thermostat 2 is closed, and as shown by arrows in FIG. 1A, the water pump 3, the water jacket 6, the take-out pipe H2, the introduction hose H3, the exhaust gas A circulation operation in which cooling water flows is performed in the order of the heat recovery device 5, the heater introduction hose H5, the heater core 4, the heater discharge hose H6, and the water pump 3. As a result, a relatively small amount of cooling water is circulated bypassing the radiator 1 so that the radiator 1 does not perform a heat radiation operation, so that the warm-up of the engine is completed at an early stage.

  On the other hand, after the warm-up of the engine is completed, the thermostat 2 is opened, and the radiator 1, the lower hose H1, the thermostat 2, the water pump 3, the water jacket 6, and the take-out pipe H2 are arranged in this order as shown by arrows in FIG. Cooling water flows. And the cooling water taken out from the engine main body E by this taking-out pipe H2 is divided into the introduction hose H3 and the upper hose H4. The cooling water divided into the introduction hose H3 is sucked into the water pump 3 after passing through the exhaust heat recovery device 5, the heater introduction hose H5, the heater core 4, and the heater discharge hose H6. On the other hand, the cooling water diverted to the upper hose H4 is returned to the radiator 1. Thereby, the heat of a part of the cooling water is released to the atmosphere by the radiator 1 to cool the cooling water, and the engine body E is maintained at an appropriate temperature.

-Exhaust heat recovery device 5 and its support structure-
Next, the exhaust heat recovery apparatus 5 which is a characteristic apparatus in the present embodiment and its support structure will be described. FIG. 2 shows a state in which the exhaust heat recovery device 5 is suspended and supported on the lower side of the vehicle body floor panel (suspending base), FIG. 2 (a) is a plan view, and FIG. 2 (b) is a side view. . The left side in the figure is the front of the vehicle body.

  As shown in these drawings, the exhaust heat recovery device 5 includes a hollow and substantially cylindrical device body 51, and an inflow pipe 52 connected to the introduction hose H 3 with respect to the outer peripheral surface of the device body 51. And a discharge pipe 53 connected to the heater introduction hose H5.

  Further, one end side (left end side in the figure) of the apparatus main body 51 is connected to the exhaust pipe 71 to become an introduction side connecting pipe portion 51a which is an exhaust gas introduction side, and the other end side (right end side in the figure). Is a discharge side connecting pipe portion 51b which is a discharge side of the exhaust gas.

  A heat exchanging portion (heat exchanging means) is accommodated in the apparatus main body 51, and heat exchange is performed between the exhaust gas and the cooling water in the heat exchanging portion. As a specific configuration of the heat exchange unit, for example, a spiral pipe having one end connected to the inflow pipe 52 and the other end connected to the discharge pipe 53 is accommodated in the apparatus main body 51. That is, when the exhaust gas that has passed through the exhaust pipe 71 as the engine main body E is driven flows through the inside of the apparatus main body 51, the exhaust gas that flows outside the spiral pipe and the cooling water that flows inside the spiral pipe. Then, heat exchange is performed, and the heat of the exhaust gas is given to the cooling water, so that the temperature of the exhaust gas is lowered and the temperature of the cooling water is raised. As a result, exhaust heat is recovered.

  The exhaust gas whose temperature has decreased due to this heat exchange passes through the exhaust pipe 72, passes through the catalytic converter and the muffler, and is released to the atmosphere. On the other hand, the cooling water whose temperature has risen flows toward the heater core 4 by the heater introduction hose H5. The heat of the cooling water is used for vehicle interior heating and engine warm-up.

  Next, the suspension support structure of the exhaust heat recovery device 5 will be described. As a feature of the suspension support structure of the exhaust heat recovery apparatus 5 in the present embodiment, the apparatus main body 51 is supported on the vehicle body side (for example, a floor panel) using the inflow pipe 52 and the exhaust pipe 53. is there. This will be specifically described below.

  The inflow pipe 52 and the exhaust pipe 53 are elastically supported via support rubbers (elastic bodies) 91 and 92 by body side support members 81 and 82 (not shown in FIG. 2A) extending downward from the floor panel. Yes. Since the elastic support structure of the inflow pipe 52 and the elastic support structure of the discharge pipe 53 are substantially the same, the elastic support structure of the inflow pipe 52 will be mainly described here.

  FIG. 3 is a longitudinal sectional view showing an elastic support portion of the inflow pipe 52. As shown in FIGS. 2 and 3, the support rubber 91 is made of a substantially oval cylindrical rubber member, and has a support member support hole 91 a penetratingly formed in the vicinity of the upper end portion thereof, while being in the vicinity of the lower end portion. An inflow pipe support hole 91b is formed through the position. The body side support member (inflow pipe support member) 81 is inserted into the support member support hole 91a, the inflow pipe 52 is inserted into the inflow pipe support hole 91b, and the inflow pipe 52 is elastically supported by the body side support member 81. .

  Specifically, the body-side support member 81 extending downward from the floor panel is formed by bending a hollow pipe, and its lower end portion is bent in the horizontal direction and formed as a horizontal portion 81a extending toward the front of the vehicle body. Has been. Further, a large-diameter portion 81b is integrally formed at the front end portion of the horizontal portion 81a so as to prevent the support member support hole 91a from dropping off. That is, the large-diameter portion 81b is inserted while expanding the support member support hole 91a, and the horizontal portion 81a of the body side support member 81 is inserted into the support member support hole 91a. 91 is attached.

  On the other hand, the inflow pipe 52 is connected to a relatively lower position of the apparatus main body 51. The inflow pipe 52 extends from the connection position in the vehicle width direction and is bent downward, and then extends horizontally toward the front of the vehicle body. A portion 52a is provided. The introduction hose H3 is connected to the tip of the horizontal portion 52a, and the cooling water flowing through the introduction hose H3 flows into the apparatus main body 51 through the inflow pipe 52. As a connection structure between the tip of the horizontal portion 52a of the inflow pipe 52 and the introduction hose H3, a large diameter portion 52b is integrally formed at the tip of the horizontal portion 52a of the inflow pipe 52, and this large diameter portion 52b is formed as the introduction hose. The outer periphery of the introduction hose H3 is tightened by the clamp member 52c in a state of being inserted inside the H3.

  The horizontal portion 52a of the inflow pipe 52 is provided with an overhanging portion 52d and a flange portion 52e so as to prevent the support rubber 91 from falling off from the inflow tube support hole 91b. The overhanging portion 52d is formed such that the tip end side (the side to which the introduction hose H3 is connected) from the mounting position of the support rubber 91 is partially bulged to the outer peripheral side, and the flange portion 52e has a disk shape. The support rubber 91 is attached to the outer peripheral surface of the inflow pipe 52 by means of welding or the like on the base end side (side connected to the apparatus main body 51) from the mounting position. That is, the large diameter portion 52b and the overhanging portion 52d are inserted while expanding the inflow pipe support hole 91b, and the horizontal portion 52a of the inflow pipe 52 is inserted into the inflow pipe support hole 91b, so that the inflow pipe 52 is supported by the support rubber. 91. In the support state of the inflow pipe 52 by the support rubber 91, each diameter is designed so that a slight gap is formed between the outer peripheral surface of the horizontal portion 52a and the inner peripheral surface of the inflow pipe support hole 91b. Yes. Thereby, not only the vibration of the vehicle body is absorbed by the elastic deformation of the support rubber 91, but also the vibration transmission to the exhaust heat recovery device 5 is mitigated by this gap. A slight gap may also be formed between the horizontal portion 81 a of the body side support member 81 and the support member support hole 91 a of the support rubber 91.

  On the other hand, the elastic support structure of the discharge pipe 53 is the same as the elastic support structure of the inflow pipe 52 described above. However, the inflow pipe 52 can easily discharge the air when the air enters the apparatus main body 51. In this way, it is connected to the upper end of the apparatus main body 51. For this reason, the shape of the discharge pipe 53 extends from the upper end position of the apparatus main body 51 and then turns around to the side of the apparatus main body 51 (the back side of the paper surface in FIG. 2B) and once goes downward. And a horizontal portion 53a extending in the horizontal direction toward the rear of the vehicle body. The horizontal portion 53a is elastically supported by a body side support member (discharge pipe support member) 82 via a support rubber 92. In FIG. 2, in place of the reference numeral “81” attached to each member for elastically supporting the inflow pipe 52, each member corresponding to the elastic support for the discharge pipe 53 is indicated by “82”. Instead of “52”, each member corresponding to elastically supporting the discharge pipe 53 is denoted by “53”. That is, 82a is a horizontal portion of the body side support member 82, 82b is a large diameter portion, 53a is a horizontal portion of the discharge pipe 53, 53b is a large diameter portion, 53c is a clamp member, 53d is an overhang portion, and 53e is a flange portion. It is.

  As described above, in this embodiment, the inflow pipe 52 and the discharge pipe 53 are elastically supported by the body side support members 81 and 82 via the support rubbers 91 and 92. For this reason, the function as the conventional support bracket (symbol “c, d” in FIG. 5) can be shared by the inflow pipe 52 and the discharge pipe 53, and as a result, the support bracket becomes unnecessary. That is, the connection position of the inflow pipe 52 and the discharge pipe 53 with respect to the apparatus main body 51 is not restricted by the support bracket, and the degree of freedom of piping layout can be increased. Further, by eliminating the support bracket, the cost of the exhaust heat recovery device 5 can be reduced, the number of parts can be reduced, and the configuration can be simplified.

(Second Embodiment)
Next, a second embodiment will be described. In this embodiment, a configuration for increasing the suspension support strength of the apparatus main body 51 by the inflow pipe 52 and the discharge pipe 53 is added to the above-described first embodiment. This is the same as in the first embodiment. Therefore, only the configuration for obtaining this high support strength will be described here.

  FIG. 4 is a diagram corresponding to FIG. 2 in the present embodiment. As shown in these drawings, each of the connection portions of the inflow pipe 52 and the discharge pipe 53 to the apparatus main body 51 has a plurality of reinforcing members that connect between the outer peripheral surface of the pipes 52 and 53 and the outer surface of the apparatus main body 51. 54, 54,... Are provided. These reinforcing members 54, 54,... Are made of a substantially triangular metal plate material, and each of the tubes 52, 53 is arranged at four positions with an angular interval of 90 ° in the circumferential direction of the outer peripheral surface of each tube 52, 53. It passes between the outer peripheral surface and the outer surface of the apparatus main body 51, and is joined to each by means such as welding.

  Further, connecting members 55 and 55 are provided between the horizontal portions 52 a and 53 a of the inflow pipe 52 and the discharge pipe 53 and the outer surface of the apparatus main body 51. The connecting members 55, 55 are made of a substantially rectangular metal plate, and are passed between the outer peripheral surfaces of the horizontal portions 52a, 53a of the tubes 52, 53 and the outer surface of the apparatus main body 51, and are welded to each other. It is joined by means of.

  Thus, by providing the reinforcing members 54, 54,... And the connecting members 55, 55, the inflow pipe 52 and the discharge pipe 53 can be firmly fixed to the outer surface of the apparatus main body 51. It is possible to ensure high suspension support strength of the apparatus main body 51 by the inflow pipe 52 and the discharge pipe 53.

  In particular, since the horizontal portions 52a and 53a of the inflow pipe 52 and the discharge pipe 53 and the outer surface of the apparatus main body 51 are connected by the connecting members 55 and 55, the connection points of the inflow pipe 52 and the discharge pipe 53 to the apparatus main body 51 are connected. The bending load that acts on (the bending load that acts on the inflow pipe 52 and the discharge pipe 53 due to the weight of the apparatus main body 51) can be greatly reduced. For this reason, it is not necessary to greatly increase the connection strength of the pipe connection portion as compared with the conventional one, and the design change of the connection portion and the complication of the connection work can be avoided.

  In this embodiment, the reinforcing members 54, 54,... And the connecting members 55, 55 are applied to both the inflow pipe 52 and the exhaust pipe 53. However, the present invention is not limited to this, and only one of them is necessary as necessary. You may make it apply.

-Other embodiments-
Each embodiment described above demonstrated the case where this invention was applied as the exhaust-heat recovery apparatus 5 of the engine for motor vehicles. The present invention is applicable not only to automobiles but also to exhaust heat recovery devices for engines used for other purposes.

  Further, the configuration for exchanging heat between the exhaust gas and the cooling water in the exhaust heat recovery device 5 is not limited to the one using the spiral pipe described above. For example, the inside of the apparatus main body 51 of the exhaust heat recovery apparatus 5 may be divided into two spaces, and heat exchange may be performed by circulating cooling water in one side and exhaust gas in the other.

  Moreover, although each said embodiment utilized the collect | recovered waste heat as heat for vehicle interior heating or engine warm-up, this invention is applicable also to what utilizes this heat for another use. It is. For example, the recovered exhaust heat energy is converted into electric energy and used.

  Furthermore, the cooling water circulation path to which the exhaust heat recovery apparatus 5 according to the present invention is applied is not limited to the one shown in FIG. 1 and can be applied to various cooling water circulation paths.

  In addition, in each embodiment mentioned above, it was set as the structure which supports these in the vehicle body side using both the inflow pipe 52 and the exhaust pipe 53 as a suspension support structure of the exhaust heat recovery apparatus 5. FIG. The present invention is not limited to this, and only one of the inflow pipe 52 and the exhaust pipe 53 may be supported on the vehicle body side.

FIG. 1A is a circuit diagram illustrating an outline of a cooling water circulation path, and FIG. 1A is a diagram illustrating a circulation operation when the engine is cold, and FIG. 1B is a diagram illustrating a circulation operation after completion of engine warm-up. The suspended state of the exhaust heat recovery apparatus in the first embodiment is shown, FIG. 2 (a) is a plan view, and FIG. 2 (b) is a side view. It is a longitudinal cross-sectional view which shows the elastic support part of an inflow tube. The suspended state of the exhaust heat recovery apparatus in the second embodiment is shown, FIG. 4A is a plan view, and FIG. 4B is a side view. FIG. 5A shows a suspended support state of a conventional exhaust heat recovery apparatus, FIG. 5A is a plan view, and FIG. 5B is a side view.

Explanation of symbols

5 Exhaust heat recovery device 51 Device main body 52 Inflow pipe 53 Exhaust pipe 54 Reinforcement member 55 Connection member 81 Body side support member (inflow pipe support member)
82 Body side support member (discharge pipe support member)
91,92 Support rubber (elastic body)
E Engine body

Claims (4)

An apparatus main body provided with heat exchange means for exchanging heat between the exhaust gas of the internal combustion engine and the heat recovery medium, an inflow pipe for flowing the heat recovery medium into the apparatus main body, and discharging the heat recovery medium from the apparatus main body In a support structure for supporting an exhaust heat recovery device provided with a discharge pipe suspended from a suspension base,
A support structure for an exhaust heat recovery apparatus, wherein at least one of the inflow pipe and the exhaust pipe is supported by a support member extending from the suspension base. In the support structure of the exhaust heat recovery apparatus according to claim 1,
The support members extending from the suspension base are an inflow pipe support member and an exhaust pipe support member, and the inflow pipe is supported by an elastic body with respect to the inflow pipe support member, while the exhaust pipe is a discharge pipe support member A support structure for an exhaust heat recovery apparatus, wherein the support structure is supported via an elastic body. In the support structure of the exhaust heat recovery apparatus according to claim 1 or 2,
A support structure for an exhaust heat recovery apparatus, wherein a connecting member for connecting the inflow pipe and the exhaust pipe to the apparatus main body is provided with a reinforcing member for connecting between the outer peripheral surface of these pipes and the outer surface of the apparatus main body. In the support structure of the exhaust heat recovery apparatus according to claim 1, 2, or 3,
The inflow pipe and the discharge pipe include a parallel portion extending substantially parallel to the extending direction of the outer surface of the apparatus main body, and the parallel portion and the outer surface of the apparatus main body are connected by a connecting member. Support structure for exhaust heat recovery device.

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