JP2015202718A - Vehicle component arrangement structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To optimize component layout in an engine room and enhance design freedom degree of a vehicle.SOLUTION: An internal combustion engine 1 is mounted in an engine room 22 disposed on a front side of a cabin 21 of the vehicle, so that a shaft direction of a crank shaft is along a width direction of the vehicle, in a laterally-placed posture. A drive shaft 20 is positioned on an inside of a U-shape formed of a first link 11, rocker arm 10 and second link 12 of a piston crank mechanism 6, in view in the shaft of crank shaft direction, and the drive shaft 20 penetrates the internal combustion engine 1 in a cylinder row direction. A wiper drive motor 32 is disposed on a lower side of a lower side of a windshield 31, and on an upper side of the internal combustion engine.

Description

  The present invention relates to a component arrangement structure in an engine room of a vehicle equipped with an internal combustion engine in which a link row of a multi-link type piston crank mechanism is arranged in a U shape when viewed in the crankshaft axial direction.

  Patent Document 1 previously filed by the present applicant includes a rocker arm that can swing around a fulcrum, a first link that connects one end of the rocker arm and a piston, the other end of the rocker arm, and a crank pin of a crankshaft. An internal combustion engine is disclosed that includes a second link to be connected and a multi-link type piston-crank mechanism having a rotation center of the crankshaft disposed on the side of the cylinder.

  In the internal combustion engine in Patent Document 1, the center of rotation of the crankshaft is arranged on the side of the cylinder, so that the overall height of the internal combustion engine is kept low, and the internal combustion engine is compactly configured as a whole to improve vehicle mountability. I am letting.

JP 2006-52667 A

  However, in a vehicle equipped with an internal combustion engine having a configuration as disclosed in Patent Document 1, it cannot be said that sufficient consideration has been made regarding the layout of component arrangement in the engine room, and there is room for improvement.

  The present invention relates to a vehicle component arrangement structure in which an internal combustion engine in which a first link, a rocker arm, and a second link constituting a piston crank mechanism are arranged in a U shape is mounted in an engine room in front of a vehicle compartment. A wiper driving motor for driving the vehicle is disposed above the internal combustion engine in the vertical direction of the vehicle.

  In a multi-link type piston crank mechanism in which the first link, rocker arm, and second link are arranged in a U shape when viewed from the crankshaft axial direction, the bore stroke ratio of the internal combustion engine can be increased by setting the link. Thus, the downsizing of the combustion chamber makes it possible to relatively shorten the length along the cylinder row direction of the internal combustion engine, and to relatively reduce the overall height of the internal combustion engine. As a whole can be reduced in size.

  According to the present invention, the wiper driving motor positioned above the internal combustion engine can be disposed relatively below the vehicle in a state where the wiper driving motor is positioned above the internal combustion engine. That is, the wiper drive motor is disposed on the upper side of the internal combustion engine so that the wiper drive motor is not pushed out to the vehicle compartment side by the internal combustion engine at the time of a frontal collision. The position of the lower side of the windshield can be set low without impairing safety at the time of a frontal collision, and the degree of freedom in designing the vehicle can be increased.

BRIEF DESCRIPTION OF THE DRAWINGS Explanatory drawing which showed typically an example of the internal combustion engine used for this invention. BRIEF DESCRIPTION OF THE DRAWINGS Explanatory drawing which showed typically the components arrangement | positioning structure of the vehicle which concerns on this invention.

  Hereinafter, an embodiment of the present invention will be described in detail with reference to FIGS. FIG. 1 is an explanatory view schematically showing an example of an internal combustion engine 1 used in the present invention, and is an explanatory view corresponding to a cross section of the internal combustion engine 1 as viewed in the crankshaft axial direction.

  FIG. 2 is an explanatory view schematically showing a vehicle component arrangement structure according to the present invention, and is an explanatory view of the engine room 22 as seen from the side surface (side) of the vehicle.

  As shown in FIG. 1, the reciprocating internal combustion engine 1 has a configuration in which a crankshaft 4 is disposed on the side of a cylinder 3 in which a piston 2 is slidably accommodated.

  In the internal combustion engine 1, the piston 2 and the crankpin 5 of the crankshaft 4 are mechanically linked by a plurality of link members, and the reciprocating linear motion of the piston 2 in the cylinder 3 is converted into the rotational motion of the crankshaft 4. A multi-link type piston crank mechanism 6 is provided.

  The piston crank mechanism 6 includes an elongated rocker arm 10 that can swing around a swing fulcrum 7, an elongated first link 11 that connects one end of the rocker arm 10 and the piston 2, the other end of the rocker arm 10, and the crankshaft 4. And a long and narrow second link 12 connecting the crank pin 5.

  For example, the rocker arm 10 is pivotally attached to a swing support shaft 13 fixed to a cylinder block or the like of the internal combustion engine 1, and swings with the shaft center of the swing support shaft 13 as a swing support point 7. To do.

  One end of the first link 11 is rotatably connected to the piston 2 via a piston pin 14. The other end of the first link 11 is rotatably connected to one end of the rocker arm 10 via a first connecting pin 15.

  One end of the second link 12 is rotatably connected to the crankpin 5. The other end of the second link 12 is rotatably connected to the other end of the rocker arm 10 via a second connecting pin 16.

  The first link 11, the rocker arm 10, and the second link 12 connected in series are arranged in a substantially U shape as a whole when viewed in the axial direction of the crankshaft, and between the piston 2 and the crankshaft 4. The positioned cylinder wall 17 is surrounded by these link members from three directions. The internal combustion engine 1 is set to have a longer piston stroke than a cylinder bore. 1 is an intake valve, 19 in FIG. 1 is an exhaust valve, and 20 in FIG. 1 is a drive shaft described later.

  As shown in FIG. 2, the internal combustion engine 1 is mounted in a sideways posture in an engine room 22 positioned in front of the vehicle compartment 21 so that the axial direction of the crankshaft 4 is along the width direction of the vehicle. Has been. The vehicle compartment 21 and the engine room 22 are partitioned by a dash panel 23. 2 in FIG. 2 is a radiator, and 25 in FIG. 2 is a drive wheel.

  A transmission (not shown) is connected to the crankshaft 4 of the internal combustion engine 1 placed horizontally in the engine room 22. In this embodiment, the internal combustion engine 1 and the transmission are connected in series along the vehicle width direction.

  The internal combustion engine 1 is penetrated by a drive shaft 20 to which drive wheels 25 are connected at both ends. Specifically, the drive shaft 20 is located inside the U-shape formed by the first link 11, the rocker arm 10 and the second link 12 of the piston crank mechanism 6 in the crankshaft axial view (in FIG. 2). It arrange | positions so that the internal combustion engine 1 may be penetrated in a cylinder row direction.

  A wiper drive motor 32 that drives a wiper (not shown) for the windshield 31 is disposed below the lower side (lower end) of the windshield 31. The wiper drive motor 32 is positioned above the internal combustion engine 1 and is attached to the engine room 22 side above the dash panel 23, for example.

  As described above, the internal combustion engine 1 has the multi-link type piston crank mechanism 6 in which the first link 11, the rocker arm 10, and the second link 12 are arranged in a U shape as viewed in the axial direction of the crankshaft. The bore stroke ratio of the internal combustion engine 1 can be increased by setting the link of the piston crank mechanism 6.

  In the present embodiment, the piston crank mechanism 6 is set so that the bore stroke ratio of the internal combustion engine 1 is increased, and the length along the cylinder row direction of the internal combustion engine 1 is relatively reduced due to the downsizing of the combustion chamber. The overall height of the internal combustion engine 1 in the in-vehicle state is relatively low, and the internal combustion engine 1 is generally downsized as a whole. That is, the internal combustion engine 1 of this embodiment is a so-called single link type piston crank mechanism or an internal combustion engine provided with a piston crank mechanism that is not a U-shaped link structure even if it is a multi-link type. Overall size is reduced.

  Therefore, the wiper drive motor 32 positioned above the internal combustion engine 1 can be disposed relatively below the vehicle with the wiper drive motor 32 positioned above the internal combustion engine 1. That is, relative to the wiper drive motor 32 disposed above the internal combustion engine 1 so that the wiper drive motor 32 is not pushed out to the vehicle compartment 21 side by the internal combustion engine 1 at the time of a forward collision. Therefore, the position of the lower side of the windshield 31 can be set low without impairing safety at the time of a forward collision, and the degree of freedom in designing the vehicle can be increased.

  In the engine room 22 in a limited space, in order to avoid the drive shaft 20, the internal combustion engine 1 is disposed on the vehicle front side or the vehicle rear side with respect to the drive shaft 20. It is actually difficult due to restrictions on the layout of the vehicle such as various parts other than the engine being arranged. Therefore, if the internal combustion engine 1 tries to avoid the drive shaft 20, the internal combustion engine 1 will be disposed above the drive shaft 20. That is, the total height of the internal combustion engine in the on-vehicle state is increased by the amount that the internal combustion engine 1 is disposed above the drive shaft 20.

  However, in the present embodiment, the drive shaft 20 is disposed so as to penetrate the internal combustion engine 1, so that the internal combustion engine 1 is located on the vehicle lower side relatively than the drive shaft 20 is disposed above the drive shaft 20. It becomes possible to arrange.

  That is, the internal combustion engine 1 and the drive shaft 20 can be arranged in a relatively small space by partially sharing the arrangement space of the internal combustion engine 1 and the arrangement space of the drive shaft 20 in the engine room 22. Thus, the degree of freedom of component layout in the engine room 22 is increased, and the degree of freedom of design can be further increased.

  In addition, by disposing the drive shaft 20 so as to penetrate the internal combustion engine, it is possible to relatively increase the collapse amount of the engine room along the vehicle front-rear direction when the vehicle collides forward.

  The dash panel 23 is formed with a wall-shaped receiving portion that receives the wiper drive motor 32 when the wiper drive motor 32 is dropped at a position below the attachment position of the wiper drive motor 32 and above the internal combustion engine 1. You may keep it. In this case, even if the wiper driving motor 32 falls off during a frontal collision, it can be received by the receiving portion.

DESCRIPTION OF SYMBOLS 1 ... Internal combustion engine 20 ... Drive shaft 21 ... Vehicle compartment 22 ... Engine room 23 ... Dash panel 31 ... Windshield 32 ... Motor for wiper drive

Claims (2)

There is provided a piston crank mechanism having a rocker arm swingable around a fulcrum, a first link connecting one end of the rocker arm and a piston, and a second link connecting the other end of the rocker arm and a crank pin of a crankshaft. In the vehicle component arrangement structure in which the internal combustion engine is mounted in the engine room in front of the passenger compartment,
In the piston crank mechanism, the first link, the rocker arm, and the second link are arranged in a U shape as viewed in the axial direction of the crankshaft,
A vehicle component arrangement structure, wherein a wiper driving motor for driving a windshield wiper is arranged above the internal combustion engine in a vertical direction of the vehicle. The crankshaft is accommodated in the engine room so that the axial direction of the crankshaft is along the vehicle width direction,
A drive shaft having drive wheels connected to both ends is disposed inside the U-shape formed by the first link, the rocker arm, and the second link of the piston crank mechanism, and is disposed so as to penetrate the internal combustion engine in the cylinder row direction. The vehicle component arrangement structure according to claim 1, wherein the vehicle component arrangement structure is provided.

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