JP2019043165A - Engine cooling structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an engine cooling structure capable of ensuring vibration resistance of a hose while improving the assembling property of the hose. An engine cooling structure that circulates a coolant between a radiator 12 and an engine 10 to cool the engine 10 extends from the engine 10 and has an inlet pipe 26 whose tip is located on the left side of the engine 10. , An outlet pipe 28 extending from the engine 10 and having a tip located on the left side of the engine 10, an inlet hose 30 communicating the inlet pipe 26 and the radiator 12, and an outlet pipe 28 and the radiator 12 communicating with each other and at least one. An outlet hose 32 that runs in parallel with the inlet hose 30 and a glasses clamp 36 that radially connects and restrains the inlet hose 30 and the outlet 32 hose in a section in which the inlet hose 30 and the outlet hose 32 run in parallel. , Equipped with. [Selection diagram] Fig. 2

Description

  The present invention discloses an engine cooling structure in which the engine is cooled by the coolant supplied from the radiator and the coolant discharged from the engine is cooled by the radiator.

  An engine cooling structure is widely known, in which an engine is cooled by a coolant supplied from a radiator and the coolant discharged from the engine is cooled by the radiator (for example, Patent Document 1). In this case, two hoses are provided between the radiator and the engine, that is, an inlet hose for introducing the coolant from the radiator to the engine and an outlet hose for introducing the coolant from the engine to the radiator.

  In addition, a flow passage through which the coolant flows is generally formed inside the engine, and from the surface of the engine, an inlet pipe in communication with the inlet of the flow passage and an outlet in communication with the outlet of the flow passage The pipe extends. When assembling the engine and the radiator, the operator connects the inlet hose to the inlet pipe and the outlet hose to the outlet pipe.

Unexamined-Japanese-Patent No. 2015-074393

  Here, when the tip of the inlet pipe and the tip of the outlet pipe, that is, where the inlet hose and the outlet hose are connected are separated from each other, the assembling workability of these hoses is deteriorated. For example, when the end of the inlet pipe is on the left side of the engine and the end of the outlet pipe is on the rear side of the engine, the operator accesses from the left side of the engine when installing the inlet hose and installs the outlet hose. Needs to be accessed from the back of the engine. At this time, the operator had to change the position and posture significantly, and the workability was bad.

  Therefore, it is also conceivable to bring the tip of the inlet pipe and the tip of the outlet pipe close to each other. However, if the ends of two pipes are simply brought close, the inlet and outlet hoses connected to these two pipes will also come close. Here, one end of the inlet and outlet hoses is connected to an engine with a large amount of vibration via an inlet pipe and an outlet pipe. When the inlet and outlet hoses are brought close to each other, the two hoses may vibrate as the engine is driven and interfere with each other. Then, the two hoses may interfere with each other to cause deterioration or breakage of the inlet and outlet hoses. That is, conventionally, it has been difficult to secure the vibration resistance of the hose while securing the assemblability of the hose.

  So, in this specification, the engine cooling structure which can secure the vibration resistance of a hose is disclosed, improving the attachment nature of a hose.

  The engine cooling structure disclosed in the present specification is an engine cooling structure that cools the engine with a coolant supplied from a radiator and cools the coolant discharged from the engine with a radiator, and extends from the engine A pipe whose tip is located on one side in the first direction of the engine, the first pipe being an inlet or an outlet of the coolant, and a pipe which extends from the engine and whose tip is located on the one side in the first direction of the engine A second pipe serving as the outlet or inlet of the coolant, a first hose communicating the first pipe and the radiator, a second pipe communicating the second pipe and the radiator, and In a section in which the first hose and the second hose run in parallel, the second hose running parallel to the first hose, and the first hose and the second hose run in parallel. Characterized in that it comprises a clamp to restrain by connecting the second hose in the radial direction.

  In this case, since the tip of the first pipe and the tip of the second pipe are both located on one side in the first direction of the engine, the assemblability of the hose is improved. Further, in the section where the first hose and the second hose run in parallel, they are radially connected and restrained by the clamp, so that the vibrations of both the hoses are suppressed and the vibration resistance is improved.

  Note that one of the first pipe and the second pipe extends from the first direction end face of the engine, and the other of the first pipe and the second pipe is orthogonal to the first direction of the engine It may extend to one side of the first direction along the outer surface of the engine from the second direction one side end face.

  In such a configuration, in order to secure the performance of the engine, the tips of the first and second pipes are positioned on one side in the first direction even if the inlet and the outlet of the refrigerant flow path in the engine are separated from each other Therefore, the assemblability of the hose can be improved while securing the performance of the engine.

  According to the cooling structure of the engine disclosed herein, the tip of the first pipe and the tip of the second pipe are both located on one side in the first direction of the engine, so that the assemblability of the hose is improved. Further, in the section where the first hose and the second hose run in parallel, they are radially connected and restrained by the clamp, so that the vibrations of both the hoses are suppressed and the vibration resistance is improved.

It is a schematic plan view of the engine front. It is a schematic perspective view of the engine circumference. It is a front view of a glasses clamp.

  Hereinafter, the cooling structure of the engine 10 will be described with reference to the drawings. FIG. 1 is a schematic plan view of the front of a vehicle. FIG. 2 is a schematic perspective view of the periphery of the engine 10. Although in FIG. 1 the outlet pipe 28 is shown thicker than the inlet pipe 26 in order to make it easy to distinguish between the inlet pipe 26 and the outlet pipe 28, in fact, both pipes 26 and 28 have the same structure. It is a diameter. Similarly, although the outlet hose 32 is shown thicker than the inlet hose 30, in fact, both hoses 30 and 32 have the same diameter. Further, in FIG. 1 and FIG. 2, thin ink is applied to the inlet hose 30 and dark ink is applied to the outlet hose 32.

  This vehicle is a hybrid vehicle having an engine 10 and a motor as a power source for driving the vehicle. However, the technology disclosed herein may be applied not only to hybrid vehicles but also to vehicles having only engine 10 as a power source.

  As shown in FIG. 1, a space called an engine compartment 100 is formed at the front of the vehicle. Near the center of the engine compartment 100, an engine 10 and a motor unit 14 are disposed. The engine 10 is a water-cooled engine, and inside the engine 10, a water jacket (not shown) that constitutes a flow path of the coolant is provided. The engine 10 is cooled by the flow of a coolant, for example, an antifreeze fluid, through the water jacket. One end of the flow path formed by the water jacket is an inlet 22 for the coolant, and the other end is an outlet 24 for the coolant. From the outer surface of the engine 10, an inlet pipe 26 in communication with the inlet 22 and an outlet pipe 28 in communication with the outlet 24 extend.

  Here, the arrangement of the inlet 22 and the outlet 24 of the coolant is set to meet the performance target of the engine 10. As shown in FIG. 1, in the present embodiment, the inlet 22 for the coolant is provided at the left end of the engine 10 and the outlet 24 for the coolant is provided at the rear end of the engine 10. Therefore, the inlet pipe 26 extends from the left end surface of the engine 10 and the outlet pipe 28 extends from the rear end surface of the engine 10. Further, the tip of the inlet pipe 26 and the tip of the outlet pipe 28 are both located on the left side of the engine 10. Therefore, although the inlet pipe 26 extending from the left end of the engine 10 is relatively short, the outlet pipe 28 extending from the rear end of the engine 10 extends to the left side of the engine 10 while being bent several times along the outer surface of the engine 10 Compared to the inlet pipe 26, it is much longer.

  A motor unit 14 is disposed on the left side of the engine 10. The motor unit 14 is a unitized unit of a motor that generates traveling power, a generator that generates electric power by the surplus power of the engine 10, a transmission, and the like. A power control unit 16 is also provided in the vicinity (for example, the upper side) of the motor unit 14. The power control unit 16 is provided with an inverter for controlling driving of a motor and a generator, a transformer for transforming input / output power, and the like.

  A radiator 12 is provided in front of the engine 10 and the motor unit 14. The radiator 12 has a radiator core 18 through which the coolant discharged from the engine 10 flows. The coolant, which is used to cool the engine 10 and whose temperature has risen, is cooled in the process of flowing through the flow path formed in the radiator core 18. Then, the cooled coolant is again sent to the engine 10 and used for cooling the engine 10.

  Further, behind the radiator core 18, a radiator fan 20, which is an electric fan, is provided. By driving the radiator fan 20 to send out the air to the rear of the vehicle, the amount of air passing through the radiator core 18 is increased, and the heat radiation from the coolant is promoted. Further, the radiator core 18 is also provided with a reserve tank for storing the coolant, a pump for pumping the coolant, and the like, all of which are well known and known techniques. Detailed explanation is omitted.

  Between the radiator core 18 and the engine 10, two types of hoses through which the coolant flows, that is, an inlet hose 30 and an outlet hose 32 are bridged. One end of the inlet hose 30 is connected to the inlet pipe 26, and one end of the outlet hose 32 is connected to the outlet pipe 28. As shown in FIG. 2, in the vicinity of the proximal end of the inlet hose 30 and the outlet hose 32, hose clips 34 for attaching the hoses 30, 32 to the corresponding pipes 26, 28 are attached. The hose clips 34 prevent the hoses 30 and 32 from coming off the pipes 26 and 28.

  Further, the other end of the inlet hose 30 is connected to the right end of the radiator core 18, and the other end of the outlet hose 32 is connected to the left end of the radiator core 18. The coolant cooled by the radiator core 18 is supplied to the water jacket of the engine 10 via the inlet hose 30 and the inlet pipe 26. The coolant supplied to the water jacket cools the engine 10 by heat exchange with the engine 10. The coolant whose temperature has been raised by the heat exchange is returned to the radiator core 18 through the outlet pipe 28 and the outlet hose 32. Then, the cooling fluid returned to the radiator core 18 is air-cooled in the process of flowing through the radiator core 18 and is supplied to the engine 10 again.

  Here, as is clear from FIGS. 1 and 2, although the advancing direction of the inlet hose 30 and the outlet hose 32 is largely divided into right and left finally, in the vicinity of the base end (near the tip of the pipes 26, 28) Are running side by side in parallel. As shown in FIG. 2, the parallel running section A is provided with an eyeglass clamp 36 for connecting and restraining the inlet hose 30 and the outlet hose 32 to each other.

  FIG. 3 is a front view of the glasses clamp 36. The eyeglass clamp 36 is configured by combining a first clamp 38 attached to the inlet hose 30 and a second clamp 40 attached to the outlet hose 32. Each of the clamps 38 and 40 has a substantially C-shape in which both ends are configured to be coupled / separable. Each of the clamps 38 and 40 is made of a material having a suitable elasticity, such as a hard plastic or a metal having a spring property. Hooks 38a and 40a connected by engaging with each other are provided at both ends of each clamp 38 and 40, and by connecting the hooks 38a and 40a, the clamps 38 and 40 have a substantially annular shape. Become. Further, hinge portions 38 b and 40 b which are locally thin are provided at 180 ° symmetrical positions of the hooks 38 a and 40 a among the clamps 38 and 40. The clamps 38 and 40 are openable and closable about the hinges 38 b and 40 b. The inner diameter of each clamp 38, 40 is the same as or slightly smaller than the outer diameter of the inlet hose 30 and outlet hose 32, so that each clamp 38, 40 can be in close contact with the corresponding hose 30, 32. In some cases, the inner diameter of the clamps 38 and 40 is made larger than the outer diameter of the hoses 30 and 32, and a plurality of protrusions projecting radially inward on the inner peripheral surface of each clamp 38 and 40, the hose 30 , 32 or the like may be provided.

  The first clamp 38 and the second clamp 40 are radially connected to one another such that their respective axes C1 and C2 are aligned. That is, each clamp 38, 40 is formed with a connecting portion 38c, 40c which protrudes outward in the radial direction from the outer peripheral surface thereof and is connected to the other clamp 40, 38. In other words, the relative positional relationship between the first clamp 38 and the second clamp 40 is fixed. Therefore, when the first and second clamps 38 and 40 are attached to the inlet hose 30 and the outlet hose 32, the mutual positional relationship between the inlet hose 30 and the outlet hose 32 at the attachment point is also fixed. Will be tied together.

  The configuration of the eyeglass clamp 36 exemplified here is an example, and any other configuration may be used as long as the two hoses 30 and 32 are radially connected to each other and restrained. For example, the glasses clamp 36 may have a configuration in which two members having a shape such that the figure of "8" is vertically divided into two are connected.

  By the way, as is clear from FIGS. 1 and 2, in this example, the outlet pipe 28 extends from the outlet 24 at the rear end face of the engine 10 and then along the outer surface of the engine 10 to the left side of the engine 10 It extends and is much longer than the inlet pipe 26. The reason for lengthening the outlet pipe 28 in this way is to improve the assemblability.

  That is, as described above, in the case of the engine 10 disclosed in the present application, the inlet 22 and the outlet 24 are separated from each other at the left end of the engine 10 in order to secure the performance thereof. The outlet 24 must be provided at the rear end of the engine 10. A case is considered in which both the inlet pipe 26 and the outlet pipe 28 connected to the inlet 22 and the outlet 24 are shortened. In this case, the tip of the outlet pipe 28, that is, the attachment point of the outlet hose 32 is located at the rear of the engine 10. On the other hand, the tip of the inlet pipe 26, that is, the attachment destination of the inlet hose 30 is located on the left side of the engine 10. That is, the attachment points of the inlet hose 30 and the outlet hose 32 are largely separated from each other. In this case, when attaching the inlet hose 30, the operator needs to access from the left side of the engine 10, and when attaching the outlet hose 32, it needs to access from the rear side of the engine 10. Therefore, in this case, the operator had to change the position and posture significantly, and the workability was poor. In addition, depending on the environment in which the assembly is performed, the operator may not reach the rear side of the engine 10 in the first place, and the outlet hose 32 may not be attached.

  Therefore, in the present embodiment, the outlet hose 32 is placed along the outer surface of the engine 10 until the tip of the outlet hose 32 reaches the left side of the engine 10, which is the same as the tip of the inlet hose 30, in order to improve assembling workability. I am extending it. Thus, the operator can attach both the inlet hose 30 and the outlet hose 32 to the corresponding pipes 26 and 28 by extending the hand from the left side of the engine 10, and the workability can be improved.

  However, when the tip of the inlet pipe 26 and the tip of the outlet pipe 28 are brought close, the inlet hose 30 and the outlet hose 32 attached to the pipes 26 and 28 should also be in proximity at their proximal end (parallel running section A). become. Here, both the inlet hose 30 and the outlet hose 32 are attached to the engine 10 via the inlet pipe 26 and the outlet pipe 28, and the vibrations of the engine 10 are transmitted via these pipes 26 and 28. When the inlet hose 30 and the outlet hose 32 are close to each other, with the vibration of the engine 10, both the hoses 30 and 32 also vibrate and interfere with each other. As a result, the inlet hose 30 and the outlet hose 32 may deteriorate or break, and in some cases, may cause a problem of coolant leakage.

  In order to avoid such a problem, in the cooling structure disclosed in the present specification, both hoses 30 and 32 are disposed in parallel running section A which runs parallel (adjacent) in the inlet hose 30 and the outlet hose 32 side by side. The eyeglass clamps 36 connect with each other in the radial direction (in parallel). By connecting with the eyeglass clamp 36, the interference between both the hoses 30 and 32 can be reliably prevented, and the deterioration of both the hoses 30 and 32 can be effectively prevented. So to speak, the vibration resistance of the inlet hose 30 and the outlet hose 32 can be improved.

  Further, in the parallel running section A, by connecting the inlet hose 30 and the outlet hose 32 with the glasses clamp 36, the vibration amount of both the hoses 30 and 32 is significantly reduced as compared with the case without the glasses clamp 36. Ru. As a result, interference between the hoses 30, 32 and other members is also effectively prevented. Further, the amount of vibration of both the hoses 30 and 32 can be reduced, so that the amount of gap to be provided between each of the hoses 30 and 32 and the other members can be reduced, so that the freedom of installation of the other members can be improved.

  As is apparent from the above description, in the cooling structure disclosed in the present specification, both the tip of the inlet pipe 26 and the tip of the outlet pipe 28 are located on the left side of the engine 10 and the inlet hose 30 and the outlet hose 32 Are connected to each other by a glass clamp 36. Thus, the vibration resistance of both the hoses 30 and 32 can be improved while improving the assembling workability of the inlet hose 30 and the outlet hose 32.

  The configuration described here is an example, and at least the tips of the two pipes 26 and 28 extending from the engine 10 are on one side of the engine 10 in the first direction, and two pipes 26 and 28 are provided. If the hoses 30 and 32 are connected and the two hoses 30 and 32 are radially connected to each other by the clamp 36 and restrained, other configurations may be changed as appropriate. For example, although in the above description, the inlet pipe 26 and the outlet pipe 28 extend from different surfaces (left end surface, rear end surface), both pipes 26 and 28 have both ends if their tips are close to each other. It may extend from the same plane. Moreover, although the example which the inlet hose 30 and the outlet hose 32 carry out parallel running up and down parallelly was mentioned in the above-mentioned description, both hoses 30 and 32 may be lined up horizontally if it runs partially parallel. . Furthermore, although the tips of the two pipes 26 and 28 are located on the left side of the engine 10 in the above description, the two pipes 26 and 28 may be used if the hoses 30 and 32 can be easily assembled. The front end of the may be located not only on the left side but also on the right side or the front side.

Reference Signs List 10 engine, 12 radiators, 14 motor units, 16 power control units, 18 radiator cores, 20 radiator fans, 22 inlets, 24 outlets, 26 inlet pipes, 28 outlet pipes, 30 inlet hoses, 32 outlet hoses, 34 hose clips , 36 glasses clamps, 38 first clamps, 40 second clamps, A parallel running section.

Claims (1)

An engine cooling structure for cooling an engine with a coolant supplied from a radiator and cooling the coolant discharged from the engine with the radiator,
A pipe extending from the engine, the tip of which is located on one side in the first direction of the engine, the first pipe serving as an inlet or an outlet for the coolant;
A pipe extending from the engine and having a tip located on one side of the engine in the first direction, the second pipe serving as an outlet or inlet of the coolant;
A first hose communicating the first pipe and the radiator;
A second hose communicating with the second pipe and the radiator, and at least partially parallel to the first hose;
A clamp that radially connects and restrains the first hose and the second hose in a section in which the first hose and the second hose run in parallel;
An engine cooling structure comprising:

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