JP2010012914A - Off-road vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To suppress submergence of a behavior detection sensor, and to simplify a constitution of an off-road vehicle. <P>SOLUTION: The off-road vehicle includes a vehicle body; a front part covering member; a seat; a fuel injection type engine; and the behavior detection sensor. The front part covering member covers an upper side of a front part of the vehicle body. The seat is arranged at a rear side than the front part covering member. The fuel injection type engine is mounted to the vehicle body. The behavior detection sensor detects behavior of the vehicle body. At least a part of the front part covering member is positioned at a position higher than the lowermost point of a sitting surface of the seat. The behavior detection sensor is arranged at a position below the front part covering member and higher than the lowermost point of the sitting surface of the seat. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to off-road vehicles.

For example, Patent Document 1 discloses an off-road vehicle as a rough terrain vehicle. Conventional off-road vehicles usually employ an engine using a carburetor. In recent years, it has also been proposed to apply a fuel injection type engine to an off-road vehicle from the viewpoint of improving engine performance.
US Patent Application Publication No. 2004/0195019 A1

  An object of the present invention is to suppress the submersion of the behavior detection sensor and simplify the configuration of the off-road vehicle.

  The off-road vehicle of the present invention includes a vehicle main body, a front covering member, a seat, a fuel injection engine, and a behavior detection sensor. The front covering member covers the upper part of the front portion of the vehicle main body. The seat is arranged behind the front covering member. The fuel injection engine is attached to the vehicle body. The behavior detection sensor detects the behavior of the vehicle body. At least a part of the front covering member is located at a position higher than the lowest point of the seating surface of the seat. The behavior detection sensor is disposed below the front covering member and at a position higher than the lowest point of the seat surface of the seat.

  ADVANTAGE OF THE INVENTION According to this invention, the submergence of a behavior detection sensor can be suppressed and the structure of an off-road vehicle can be simplified.

(First embodiment)
Hereinafter, an example of a preferred embodiment of an off-road vehicle embodying the present invention will be described by taking the off-road vehicle 1 shown in FIG. 1 as an example. However, the off-road vehicle 1 shown in FIG. 1 is merely an example of the off-road vehicle of the present invention. The present invention is not limited to the off-road vehicle 1 shown in FIG.

  As shown in FIGS. 1 and 2, the off-road vehicle 1 includes a vehicle body 10. As shown mainly in FIG. 2, the vehicle body 10 includes a body frame 11. The vehicle body frame 11 includes a frame body 15, a front frame 13, a rear frame 14, and a roof support 16.

  The frame body 15 is located at the center of the off-road vehicle 1 in the front-rear direction. The frame main body 15 includes two side members 12. The side member 12 is disposed so as to extend in the front-rear direction. The two side members 12 are arranged in the vehicle width direction. The two side members 12 are fixed to each other by a cross member (not shown).

  The front frame 13 is connected to the front half of the frame body 15. The front frame 13 is disposed on the front side portion of the off-road vehicle 1. A front wheel 20 is rotatably attached to the front frame 13 via a suspension (not shown). As shown in FIG. 1, the front wheel 20 includes a right front wheel 20a and a left front wheel 20b.

  A front covering member 30 is disposed above the front frame 13. The front frame 13 is covered with the front covering member 30. The front covering member 30 includes at least a bonnet 31. Specifically, the front covering member 30 includes a dashboard 32 and a bonnet 31. A meter visor is formed on the dashboard 32. Various meters arranged on the front panel 27 are protected by the meter visor.

  As shown in FIG. 2, a front panel 27 is disposed behind the front covering member 30. The front panel 27 isolates a front portion and a rear portion of the vehicle from the front panel 27. That is, the front portion where the air cleaner 70 is disposed and the cabin 25 are isolated.

  The rear frame 14 is attached to the rear portion of the frame body 15. The rear frame 14 is disposed on the rear side portion of the off-road vehicle 1. A rear wheel 21 is rotatably attached to the rear frame 14 via a suspension (not shown). As shown in FIG. 1, the rear wheel 21 includes a right rear wheel 21a and a left rear wheel 21b. As shown in FIG. 2, a cargo bed 22 is disposed on the rear frame 14.

  As shown in FIG. 2, the roof support 16 is formed in a loop shape in a side view. The roof support 16 is disposed between the front frame 13 and the rear frame 14. As shown in FIG. 1, the roof support 16 includes a right roof support 16a and a left roof support 16b. The roof supports 16a and 16b are fixed to the frame body 15, the front frame 13, and the rear frame 14, respectively.

  As shown in FIG. 2, a cabin 25 on which a rider rides is defined between the front frame 13 and the rear frame 14. A seat 35 is disposed in the cabin 25. As shown in FIG. 1, the sheet 35 includes a right sheet 35 a and a left sheet 35 b. The right seat 35a and the left seat 35b are arranged in the vehicle width direction.

  A footrest portion 29 is disposed on the front side of the seat 25 of the cabin 25. The footrest portion 29 is located at a position lower than the seat surface 36 of the seat 35.

  As shown mainly in FIG. 1, a tunnel portion 37 is formed between the right seat 35a and the left seat 35b. As shown in FIG. 2, the tunnel portion 37 is formed so as to bulge upward from the footrest portion 29. The top portion of the tunnel portion 37 is located at a position higher than the footrest portion 29. Further, as shown in FIG. 2, the top portion of the tunnel portion 37 is positioned higher than the seat surface 36 of the seat 35.

  A shift lever 38 is disposed in a portion of the tunnel portion 37 on the front side of the seat 35. The shift lever 38 includes a lever main body 38a and a shift knob 38b. The shift knob 38b is attached to the tip of the lever body 38a. The shift lever 38 is used for switching the parking, neutral, forward and reverse in the off-road vehicle 1.

  In the cabin 25, a steering 26 is disposed in front of the left seat 35b.

  As shown in FIG. 3, an engine unit 40 is suspended from the vehicle body frame 11. The engine unit 40 is attached to the vehicle body frame 11 via a rubber member. In other words, the engine unit 40 is so-called rubber mounted.

  As shown in FIG. 7, the engine unit 40 includes a fuel injection type engine 41, a transmission mechanism 60, and a centrifugal clutch 55. In the present embodiment, the engine 41 is a water-cooled single cylinder engine. However, in the present invention, the engine may not be a single cylinder engine. The engine may be, for example, a parallel multi-cylinder engine, a V-type multi-cylinder engine, or a horizontally opposed multi-cylinder engine. The engine may be air-cooled.

  As shown in FIG. 3, the engine 41 includes a crankcase 42, a cylinder body 46, and a cylinder head 48.

  The cylinder body 46 is attached to the rear half portion of the crankcase 42. The cylinder body 46 extends obliquely upward from the crankcase 42 toward the rear.

  As shown in FIG. 7, a crankshaft 43 is disposed inside the crankcase 42. The crankshaft 43 extends in the vehicle width direction. A base end portion of a connecting rod 44 is connected to the crankshaft 43. A piston 45 is connected to the tip of the connecting rod 44.

  A cylinder 47 is formed inside the cylinder body 46. The piston 45 is disposed in the cylinder 47.

  The cylinder head 48 is attached to the tip of the cylinder body 46. A combustion chamber 49 is defined by the cylinder head 48 and the cylinder body 46. The cylinder head 48 is formed with an intake port 50 and an exhaust port 51 that open to the combustion chamber 49. An intake valve 52 is disposed in the intake port 50. When the intake valve 52 is driven by the intake cam 67, the intake port 50 is opened and closed. On the other hand, an exhaust valve 53 is disposed in the exhaust port 51. When the exhaust valve 53 is driven by the exhaust cam 68, the exhaust port 51 is opened and closed.

  A throttle body 54 is connected to the intake port 50. As shown in FIG. 7, the throttle body 54 includes a fuel injector 54a and a throttle valve 54b. The throttle body 54 mixes air supplied from an air cleaner 70 described later and fuel injected from the fuel injector 54a to form an air-fuel mixture. This air-fuel mixture is supplied to the combustion chamber 49 via the intake port 50. On the other hand, the exhaust port 51 is connected to an exhaust pipe and an exhaust muffler (not shown). As a result, the exhaust from the engine unit 40 is discharged outside the vehicle via the exhaust pipe and the exhaust muffler.

  As shown in FIG. 3, a pressure sensor 54 c is attached to the throttle body 54. The pressure in the intake port 50 shown in FIG. 7 is detected by the pressure sensor 54c.

  As shown in FIG. 3, a breather chamber 56 is formed inside the cylinder head 48. The breather chamber 56 is connected to an accumulator 65 a by a breather hose 57. Thereby, the breather gas in the engine unit 40 is gas-liquid separated in the breather chamber 56. The breather gas after the gas-liquid separation is supplied to the combustion chamber 49 via the accumulator 65a and recombusted in the combustion chamber 49.

  As shown in FIG. 7, a centrifugal clutch 55 is arranged inside the crankcase 42 shown in FIG. The centrifugal clutch 55 is connected to the left end portion of the crankshaft 43. Specifically, the centrifugal clutch 55 includes an inner 55a and an outer 55b. The inner 55a is non-rotatably connected to the crankshaft 43. On the other hand, the outer 55 b is rotatable with respect to the crankshaft 43. As the rotational speed of the crankshaft 43 increases, the centrifugal force applied to the inner 55a also increases accordingly. Thereby, the inner 55a and the outer 55b are connected, and the centrifugal clutch 55 is connected. On the other hand, when the rotational speed of the crankshaft 43 becomes slow, the centrifugal force acting on the inner 55a also becomes small. Thereby, the inner 55a and the outer 55b are separated, and the centrifugal clutch 55 is disconnected.

  As shown in FIG. 7, a transmission mechanism 60 is arranged inside the crankcase 42 shown in FIG. In the present embodiment, the transmission mechanism 60 is a belt-type continuously variable transmission (CVT). However, in the present invention, the transmission mechanism may not be a belt-type continuously variable transmission mechanism. The transmission mechanism may be a continuously variable transmission mechanism other than the belt type. For example, the speed change mechanism may be a trochoidal type continuously variable speed change mechanism. The transmission mechanism may be a stepped transmission mechanism having a plurality of transmission gear pairs.

  As shown in FIG. 7, the speed change mechanism 60 includes a primary sheave 61 and a secondary sheave 62. The primary sheave 61 is disposed at the left end portion of the crankshaft 43. The primary sheave 61 cannot rotate with respect to the outer 55 b of the centrifugal clutch 55. On the other hand, the primary sheave 61 is rotatable with respect to the crankshaft 43. For this reason, when the rotation of the crankshaft 43 is slow and the centrifugal clutch 55 is not connected, the primary sheave 61 does not rotate. On the other hand, when the rotational speed of the crankshaft 43 is fast and the centrifugal clutch 55 is connected, the primary sheave 61 rotates together with the crankshaft 43.

  Secondary sheave 62 is disposed in front of primary sheave 61. Secondary sheave 62 is attached to secondary shaft 64 so as not to rotate. A belt 63 having a substantially V-shaped cross section is wound between the primary sheave 61 and the secondary sheave 62. The rotation of the primary sheave 61 is transmitted to the secondary sheave 62 and the secondary shaft 64 by the belt 63. Secondary shaft 64 is connected to front wheel 20 and rear wheel 21 via a power transmission mechanism (not shown). Thereby, the rotation of the secondary shaft 64 is transmitted to the front wheel 20 and the rear wheel 21.

  As shown in FIG. 3, the throttle body 54 is connected to the second intake pipe 65. The second intake pipe 65 is disposed between the throttle body 54 and the air cleaner 70. The throttle body 54 and the second intake pipe 65 are connected by a first intake pipe 58. The front end 58 a of the first intake pipe 58 extends to the inside of the second intake pipe 65. Thereby, the distance between the accumulator 65a mentioned later and the throttle body 54 is adjusted.

  The rear portion of the second intake pipe 65 is formed thicker than the front portion of the second intake pipe 65. In other words, the volume per unit length of the rear portion of the second intake pipe 65 is larger than the volume per unit length of the front portion of the second intake pipe 65. The rear portion of the second intake pipe 65 constitutes an accumulator 65a. On the other hand, the front side portion of the second intake pipe 65 constitutes a connection portion 65b. The tip of the connection portion 65b is connected to an air cleaner 70 as an intake system component via a third intake pipe 66.

  By arranging the accumulator 65a between the air cleaner 70 and the engine unit 40 as in the present embodiment, it is possible to improve the intake efficiency of the air supplied from the air cleaner 70. Thereby, the performance of the engine unit 40 can be improved. Specifically, the response of the engine unit 40 in the high speed range can be improved.

  An intake air temperature sensor 79 is arranged at the end of the accumulator 65a on the engine unit 40 side. The intake air temperature sensor 79 detects the temperature of intake air to the engine unit 40. Specifically, the intake air temperature sensor 79 detects the temperature in the accumulator 65a. The intake air temperature sensor 79 outputs the detected temperature to the ECU 80 described later as the intake air temperature.

  The second intake pipe 65 is integrally formed by blow molding. As shown in FIG. 3, a fixed portion 65 d is formed at the front end portion of the connection portion 65 b of the second intake pipe 65. In the fixed portion 65d, the second intake pipe 65 is fixed to the front frame 13. On the other hand, the rear end portion of the second intake pipe 65 is suspended from the rear frame 14 by a suspension member 69. For this reason, even if the engine unit 40 is slightly swung or vibrated, a large force is not applied to the second intake pipe 65 or the first intake pipe 58. In particular, when the engine unit 40 is so-called rubber mounted as in the present embodiment, the engine unit 40 is likely to swing or vibrate. For this reason, this configuration is particularly useful.

  The material of the suspension member 69 is not particularly limited. The suspension member 69 may be configured by an elastic member. Specifically, the suspension member 69 may be formed of rubber.

  The air cleaner 70 is disposed below the front covering member 30. The air cleaner 70 is fixed to the front frame 13. The air cleaner 70 is formed with a suction port 71 for sucking air. The suction port 71 is formed in the upper part of the air cleaner 70. The suction port 71 opens rearward. An intake pipe 72 is attached to the intake port 71. The intake pipe 72 extends obliquely downward from the intake port 71 toward the rear.

  In the present embodiment, an example in which an air cleaner 70 is disposed as an intake system component will be described. However, the present invention is not limited to this configuration. Instead of the air cleaner 70, an air chamber may be arranged.

  As shown in FIG. 3, the front frame 13 includes a portal frame 13a. As shown in FIG. 5, the portal frame 13a includes a portal frame body 13b and an arch portion 13c.

  As shown in FIGS. 3 and 4, an inclination angle detection sensor 83 as a behavior detection sensor is attached to the arch portion 13c of the portal frame 13a. The tilt angle detection sensor 83 is a sensor for detecting the behavior of the vehicle body 10. Specifically, the tilt angle detection sensor 83 is a sensor that detects the tilt angle of the vehicle body 10. The inclination angle detection sensor 83 detects how much the vehicle body 10 is inclined with respect to the horizontal.

  As shown in FIG. 4, the off-road vehicle 1 is provided with an ECU (Electronic Control Unit) 80 as a control unit. As shown in FIG. 8, the tilt angle detection sensor 83 is connected to the ECU 80. Specifically, the ECU 80 includes a determination unit 80a and an engine control unit 80b. The inclination angle detection sensor 83 is connected to the determination unit 80a. The determination unit 80a is connected to the engine control unit 80b. The engine control unit 80b is connected to the fuel injector 54a of the throttle body 54.

  Next, control in the ECU 80 will be described with reference mainly to FIG. First, as shown in FIG. 9, the inclination angle of the vehicle body 10 is detected by the inclination angle detection sensor 83 (step S1). The detection of the inclination angle is continuously performed at predetermined intervals while the power of the off-road vehicle 1 is on. The inclination angle detected by the inclination angle detection sensor 83 is output to the determination unit 80a of the ECU 80.

  Next, in step S2, the determination unit 80a determines whether or not the detected inclination angle is equal to or greater than a predetermined inclination angle. Here, the predetermined inclination angle can be appropriately determined according to the specifications of the off-road vehicle 1. For example, the predetermined inclination angle can be set to an angle such as 45 ° or 60 °.

  If it is determined in step S2 that the tilt angle detected in step S1 is not equal to or greater than the predetermined tilt angle, the process returns to step S1.

  On the other hand, if it is determined in step S2 that the tilt angle detected in step S1 is greater than or equal to the predetermined tilt angle, the process proceeds to step S3.

  In step S3, a signal indicating that the inclination angle is a predetermined inclination angle is first output from the determination unit 80a to the engine control unit 80b. When the signal is input, the engine control unit 80b outputs a signal for stopping the fuel injector 54a to the fuel injector 54a. As a result, the fuel injector 54a is stopped and the engine unit 40 is turned off.

  In the present embodiment, an example in which the engine 41 is stopped by stopping the fuel injector 54a will be described. However, in the present invention, the stopping method of the engine 41 is not particularly limited. For example, the engine 41 may be stopped by turning off the main relay of the ECU 80.

  Next, the arrangement of the tilt angle detection sensor 83, the ECU 80, and the like will be described in more detail with reference mainly to FIGS. First, the arrangement of the tilt angle detection sensor 83 will be described in detail. As shown in FIG. 3, the inclination angle detection sensor 83 is disposed below the front covering member. Specifically, the front covering member 30 extends obliquely downward toward the front. The inclination angle detection sensor 83 is disposed below the rear end of the front covering member 30. More specifically, the tilt angle detection sensor 83 is disposed below the dashboard 32. Further, with respect to the height direction, the inclination angle detection sensor 83 is disposed at a position higher than the lowest point of the seating surface 36 of the seat 35. A straight line H1 shown in FIG. 3 is a horizontal straight line passing through the lowest point of the seating surface 36 of the seat 35.

  As shown in FIG. 3, the inclination angle detection sensor 83 is disposed at a position higher than the lower end of the intake port 72 a of the intake pipe 72 attached to the air cleaner 70.

  With respect to the vehicle width direction, as shown in FIG. 1, the tilt angle detection sensor 83 is disposed at substantially the center of the vehicle body 10. Specifically, the inclination angle detection sensor 83 is disposed between the central axis C1 of the right front wheel 20a and the central axis C2 of the left front wheel 20b. Specifically, it is disposed between the central axis C3 in the vehicle width direction of the right seat 35a and the central axis C4 in the vehicle width direction of the left seat 35b. More specifically, with respect to the vehicle width direction, it is disposed between the center side end portion of the right seat 35a and the center side end portion of the left seat 35b. In other words, the tilt angle detection sensor 83 is disposed in front of the tunnel portion 37.

  As shown in FIG. 4, the ECU 80 is disposed on the right side in the vehicle width direction with respect to the inclination angle detection sensor 83. Specifically, the ECU 80 is disposed inside the battery box 75.

  As shown in FIGS. 4 and 5, the air cleaner 70 is disposed substantially at the center of the vehicle body 10 in the vehicle width direction. The battery box 75 is disposed on the right side of the air cleaner 70. The inside of the battery box 75 is formed in a semi-enclosed space. A battery 76 and a relay assembly 77 are arranged in the battery box 75 together with the ECU 80.

  The ECU 80 is attached to the inner wall surface of the battery box 75. The connector 81 of the ECU 80 faces the horizontal direction.

  On the other hand, a regulator 78 is arranged on the left side of the air cleaner. As described above, the air cleaner 70 is disposed between the regulator 78 and the battery box 75.

  As described above, the inclination angle detection sensor 83 as the behavior detection sensor is disposed at a position higher than the lowest point of the seating surface 36 of the seat 35 as shown in FIG. For this reason, by disposing the tilt angle detection sensor 83 at a position higher than the lowest point of the seat surface 36, for example, even when the off-road vehicle 1 is submerged to the height of the seat surface 36, the tilt angle detection is performed. It is possible to effectively suppress the sensor 83 from being submerged. For this reason, for example, it is not necessary to completely waterproof the tilt angle detection sensor 83. In other words, heavy packaging for waterproofing the tilt angle detection sensor 83 is not required. For this reason, the configuration of the off-road vehicle 1 can be simplified.

  Further, the inclination angle detection sensor 83 is disposed below the front covering member 30. For this reason, it is possible to protect the inclination angle detection sensor 83 from water, mud, and the like scattered from the front while the off-road vehicle 1 is traveling.

  By the way, from the viewpoint of accurately detecting the behavior of the vehicle main body 10, it is preferable to arrange the inclination angle detection sensor 83 at the center of the vehicle main body 10 in plan view. Further, from the viewpoint of increasing the sensitivity of the tilt angle detection sensor 83, it is preferable to arrange the tilt angle detection sensor 83 at a relatively high position.

  For example, in All Terrain Vehicle (ATV), the seat is located at the approximate center in a plan view of the vehicle. In addition, the seat surface of the seat is located at a relatively high position. For this reason, in the ATV, it is preferable to arrange the tilt angle detection sensor 83 at a relatively high position below the seat.

  However, in the off-road vehicle 1, the cabin 25 is disposed at the center of the vehicle body 10. The cabin 25 is formed with a footrest 29 arranged at a position lower than the seat surface of the seat 35. For this reason, if it is going to arrange | position the inclination-angle detection sensor 83 in the center part of the vehicle main body 10, it will arrange | position to the downward direction of the sheet | seat 35, or the downward direction of the footrest part 29. FIG. Thus, if the inclination angle detection sensor 83 is arranged in the center of the vehicle body 10 in plan view, the attachment position of the inclination angle detection sensor 83 is lowered, and the inclination angle detection sensor 83 may be submerged. For this reason, it becomes necessary to separately provide a heavy packaging for waterproofing the tilt angle detection sensor 83. Further, since the mounting position of the tilt angle detection sensor 83 is lowered, the sensitivity of tilt angle detection is lowered.

  On the other hand, in the off-road vehicle 1 according to the present embodiment, although the attachment position of the inclination angle detection sensor 83 is slightly deviated from the center of the vehicle body 10 in plan view, the inclination angle detection sensor 83 is set to a relatively high position. Can be arranged. Therefore, it is not necessary to separately provide a heavy package for waterproofing the behavior detection sensor. In addition, the sensitivity of detecting the tilt angle can be increased.

  The inclination angle detection sensor 83 is preferably disposed below the rear end of the front covering member 30. Thereby, the attachment position of the inclination angle detection sensor 83 can be brought closer to the center of the vehicle main body 10. For this reason, the inclination angle of the vehicle body 10 can be detected more accurately.

  In the present embodiment, the front covering member 30 extends obliquely downward toward the front. For this reason, the attachment position of the inclination angle detection sensor 83 can be made higher by arranging the inclination angle detection sensor 83 below the rear end portion of the front covering member 30.

  The inclination angle detection sensor 83 is disposed at a position higher than the lower end of the intake port 72a of the intake pipe 72. For this reason, the submersion of the tilt angle detection sensor 83 can be reliably suppressed.

  As shown in FIG. 1, in the present embodiment, the inclination angle detection sensor 83 is disposed between the central axis C1 of the right front wheel 20a and the central axis C2 of the left front wheel 20b. For this reason, the inclination angle detection sensor 83 can more accurately detect the inclination angle. Further, in the present embodiment, the right seat 35a is disposed between the central axis C3 in the vehicle width direction and the central axis C4 in the vehicle width direction of the left seat 35b. Therefore, the detection accuracy of the inclination angle by the inclination angle detection sensor 83 can be further improved. In particular, the inclination angle detection sensor 83 is disposed at the center of the vehicle body 10 in the vehicle width direction. Therefore, it is possible to particularly improve the accuracy of detecting the inclination angle by the inclination angle detection sensor 83.

(Second Embodiment)
In the above embodiment, the case where the inclination angle detection sensor 83 is provided as the behavior detection sensor has been described. However, in the present invention, the behavior detection sensor is not limited to the tilt angle detection sensor. The behavior detection sensor may be a G sensor, for example. Here, the G sensor is a sensor for detecting the direction in which gravity acts. In the present embodiment, a case where a G sensor is provided as a behavior detection sensor will be described.

  In the description of the present embodiment, members having substantially the same function will be described using the same reference numerals as in the above embodiment, and detailed description thereof will be omitted.

  As shown in FIG. 10, in this embodiment, a G sensor 83a is arranged as a behavior detection sensor. By providing the G sensor 83a, it is possible to detect in which direction gravity is acting with respect to the vehicle body 10.

  Further, as shown in FIG. 10, in the present embodiment, the G sensor 83a is included in the ECU 80. Specifically, the ECU 80 includes a chip G sensor 83a.

  As shown in FIG. 4, an ECU 80 having a G sensor 83 a is disposed in the battery box 75.

  As described above, in the present embodiment, the G sensor 83a is used as the behavior detection sensor. Thereby, a behavior detection sensor can be made compact. Further, by integrating the G sensor 83a with the ECU 80, the whole of the behavior detection sensor and the control unit can be made more compact, and the wiring structure can be simplified.

  In the present embodiment, the ECU 80 having the G sensor 83 a is disposed in the battery box 75. Therefore, the ECU 80 including the G sensor 83a can be protected from mud splashes from below.

(Modification)
In the above embodiment, the case where the control for stopping the engine 41 is performed based on the detection result of the behavior detection sensor has been described. However, the present invention is not limited to this configuration. For example, the fuel injection amount or ignition timing of the engine 41 may be controlled based on the detection result of the behavior detection sensor.

  Further, the behavior detection sensor may detect, for example, an inclination angle of at least one of the front-rear direction and the vehicle width direction of the off-road vehicle. Further, the behavior detection sensor may detect, for example, an inclination angle of the off-road vehicle in the front-rear direction or the vehicle width direction.

It is a top view of the off-road vehicle of a 1st embodiment. It is a left view of the off-road vehicle of a 1st embodiment. It is the left view which expanded a part of off-road vehicle of a 1st embodiment. It is the schematic plan view which expanded a part of front part of the off-road vehicle of 1st Embodiment. It is the schematic front view which expanded the part of the dashboard vicinity of the off-road vehicle of 1st Embodiment. It is a top view of the behavior detection sensor in a 1st embodiment. It is a conceptual diagram showing the structure of the engine unit in 1st Embodiment. It is a control block diagram of the off-road vehicle in the first embodiment. It is a control flowchart in the off-road vehicle in a 1st embodiment. It is a control block diagram of the off-road vehicle in 2nd Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Off-road vehicle 10 Vehicle main body 20 Front wheel 25 Cabin 30 Front part covering member 31 Bonnet 35 Seat 35a Right side seat 35b Left side seat 36 Seat surface 41 Engine 70 Air cleaner (intake system parts, air chamber)
75 Battery box 76 Battery 80 ECU (electronic control unit)
83 Tilt angle sensor (behavior detection sensor)
83a G sensor

Claims (16)

A vehicle body,
A front covering member that covers an upper portion of the front portion of the vehicle body;
A seat disposed behind the front covering member;
A fuel injection engine attached to the vehicle body;
A behavior detection sensor for detecting the behavior of the vehicle body;
With
At least a part of the front covering member is located at a position higher than the lowest point of the seating surface of the seat,
The behavior detection sensor is an off-road vehicle disposed below the front covering member and at a position higher than the lowest point of the seating surface of the seat. The off-road vehicle according to claim 1,
In a plan view, a cabin in which the seat is arranged is formed at the center of the vehicle body in the front-rear direction.
The behavior detection sensor is an off-road vehicle disposed in front of the cabin. In the off-road vehicle according to claim 2,
The front covering member extends obliquely downward toward the front,
The behavior detection sensor is an off-road vehicle disposed below a rear end portion of the front covering member. In the off-road vehicle according to claim 2,
An off-road vehicle further comprising a footrest portion disposed in the cabin and positioned at a position lower than the lowest point of the seating surface of the seat. The off-road vehicle according to claim 1,
An intake system component disposed below the front covering member and having an intake port for sucking air supplied to the engine;
The behavior detection sensor is an off-road vehicle disposed at a position higher than a lower end of the suction port. The off-road vehicle according to claim 5,
The intake system part is an off-road vehicle which is an air chamber. The off-road vehicle according to claim 5,
The intake system component is an off-road vehicle that is an air cleaner. The off-road vehicle according to claim 1,
The vehicle further includes two front wheels rotatably attached to the vehicle body and arranged in the vehicle width direction,
The behavior detection sensor is an off-road vehicle disposed between the centers of the two front wheels in the vehicle width direction. The off-road vehicle according to claim 1,
The seat includes two seats arranged in the vehicle width direction,
The behavior detection sensor is an off-road vehicle disposed between the centers of the two seats in the vehicle width direction. The off-road vehicle according to claim 1,
A battery box disposed below the front covering member;
A battery disposed in the battery box;
Further comprising
The behavior detection sensor is an off-road vehicle disposed in the battery box. The off-road vehicle according to claim 1,
An ECU for controlling the engine;
The behavior detection sensor is an off-road vehicle included in the ECU. The off-road vehicle according to claim 11,
A battery box disposed below the front covering member;
A battery disposed in the battery box;
Further comprising
The ECU is an off-road vehicle disposed in the battery box. The off-road vehicle according to claim 1,
The behavior detection sensor is an off-road vehicle that is an inclination angle detection sensor that detects an inclination angle of the vehicle body. The off-road vehicle according to claim 1,
The behavior detection sensor is an off-road vehicle that is a G sensor that detects a direction of gravity with respect to the vehicle body. The off-road vehicle according to claim 1,
An off-road vehicle including at least a bonnet in the front covering member. The off-road vehicle according to claim 1,
An off-road vehicle further comprising an ECU for controlling the engine based on a detection result of the behavior detection sensor.

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