CN1576547A

CN1576547A - Internal combustion engine with detector mounted in engine unit for vehicle use

Info

Publication number: CN1576547A
Application number: CN 200410069673
Authority: CN
Inventors: 土桥富生
Original assignee: Honda Motor Co Ltd
Current assignee: Honda Motor Co Ltd
Priority date: 2003-07-14
Filing date: 2004-07-14
Publication date: 2005-02-09
Anticipated expiration: 2024-07-14
Also published as: CN101042089A; JP3883988B2; CN101042090A; JP2005030311A; CN100338345C; CN101042090B

Abstract

The invention reliably protects a detector from bounced water or pebble while a vehicle is traveling without increasing the number of parts.A vehicular internal combustion engine E has a compressor 7 mounted on a lower block 2 and an oil pan 3 via a bracket 20 for an auxiliary engine, and a crank angle sensor 40 which is mounted on a mounting seat formed on an external wall of an engine block Eb and exposed outside. The mounting seat is provided at the position covered by the bracket 20 interposed between the lower block 2 and the compressor 7 on the lower block 2 to constitute a lower area of the engine block Eb. The crank angle sensor 40 is covered by the bracket 20 between the lower block 2 and the bracket 20 on the back side of the bracket 20, and the compressor 7 is disposed on the face side of the bracket 20.

Description

Vehicle internal-combustion engine with the detector that is installed on cluster engine

Technical field

The present invention relates to have by carriage and be installed in the subsidiary engine of cluster engine and be installed in the vehicle internal-combustion engine of detector of the assembly department of cluster engine outer wall, specifically relate to the mounting structure of detector.

Background technique

As the mounting structure of the detector that is installed in the internal-combustion engine on the vehicle, known have a for example mounting structure of the crank angle sensor of patent documentation 1 disclosed motor.In this motor, sensor main body as the crank angle sensor of detector, by crankshaft, integratedly be located at the water pump central shaft of cylinder block sidepiece, be installed in by carriage near the central authorities of central shaft area surrounded of alternator of cylinder block sidepiece, be installed on the sidewall of cylinder block.Like this, because flexible utilization dead space volume (dead space) is come the sensors configured main body, so improve space efficiency.

Patent documentation 1 spy opens the 2000-248977 communique

; crank angle sensor is configured in around the crankshaft; and be configured in the lower area of cylinder block more; in this case; in the process of vehicle driving; when the road conditions of particularly travelling are bad etc., the water on the road splashes down on crank angle sensor, or the gravelstone grain of upspringing can clash into crank angle sensor.About this point, in described prior art, although being installed in the sensor main body of cylinder block is surrounded by water pump and alternator, but be installed on the cylinder block by carriage because be positioned at the alternator of water pump below, because the intervention of carriage, the gap between cylinder block and the alternator correspondingly becomes greatly, so water on the road and gravelstone grain enter from this gap easily, cause water to splash down on sensor main body or be subjected to the bump of gravelstone grain, cause the sensor main body damaged sometimes.

And, cylinder block with the vibration of internal-combustion engine has been thereby vibration, so being installed in the crank angle sensor of cylinder block also vibrates, the durability of crank angle sensor reduces, even in the detector of the position of the detected portion that the detection as the crank angle sensor is moved, produce sometimes and detect error.

Summary of the invention

The present invention In view of the foregoing proposes, and the purpose of the described invention of claim 1～3 is, does not increase part count, protects damages such as water that detector do not upspring in the vehicle driving process or gravelstone grain more reliably.And the purpose of the described invention of claim 2 also is, confirms to be equipped with that detector, the purpose of the described invention of claim 3 also are easily, reduces the influence of vibration to detector, improves the durability of detector.

The described vehicle internal-combustion engine of claim 1 has: supporting rotatable crankshaft by cluster engine; Be installed in the subsidiary engine of described cluster engine by carriage; And be installed in the assembly department of the outer wall that is formed at described cluster engine and be exposed to outside detector, described assembly department is at the lower area of described cluster engine, be located at the position that is covered by the described carriage between described cluster engine and described subsidiary engine, described detector is configured between described cluster engine and the described carriage in the cluster engine side of described carriage, and covered by described carriage, described subsidiary engine is configured in the cluster engine opposition side of described carriage.

Like this, the detector of the lower area of the cluster engine that the possibility of bumps such as the gravelstone grain that is installed on that the water of upspringing splashes down or is upspring in the vehicle driving process is big, owing to be located between cluster engine and the subsidiary engine, and by being covered with near the carriage that is configured in cluster engine, so the gap of cluster engine and carriage is less than the gap between cluster engine and the subsidiary engine, so difficult cluster engine sides that enter carriage from this close gap such as water of upspringing in the running process or gravelstone grain, and carriage stops the water of upspringing or gravelstone grain etc., and the possibility that water or gravelstone grain etc. touches detector further reduces.And the curtain-shaped cover member that is located at water between cluster engine and the subsidiary engine or gravelstone grain etc. is the subsidiary engine carriage that utilizes when subsidiary engine is installed in cluster engine, so do not need new parts.

As a result, can bring into play following effect according to claim 1.Promptly; the assembly department that detector is installed is at the lower area of vehicle with the cluster engine of internal-combustion engine; be located at the position that covers by the carriage between cluster engine and subsidiary engine; detector is configured between cluster engine and the carriage in the cluster engine side of carriage; and covered by carriage; subsidiary engine is configured in the cluster engine opposition side of carriage; thus; water of upspringing in the running process or gravelstone grain etc. are difficult for entering the cluster engine side of carriage; and carriage can stop the water of upspringing or gravelstone grain etc.; and utilize subsidiary engine to use carriage as this curtain-shaped cover member; so can not increase part count, protect detector more reliably not by damages such as water of upspringing in the vehicle driving process or gravelstone grains.

Claim 2 is the vehicle internal-combustion engines according to claim 1, and the electric wire that connects described detector extends to not by the position of described carriage and the covering of described subsidiary engine.

Like this, in that only carriage or carriage and subsidiary engine are installed under the state of cluster engine, be equipped with under the situation of detector, can confirming easily to extend to not by the electric wire of the position of carriage and subsidiary engine covering, so confirm to be installed in the detector that carriage be can't see easily behind.

As a result, according to claim 2, on the basis of the effect of the described invention of claim 1, can also bring into play following effect.Promptly, the electric wire of connection detector extends to not by the position of carriage and subsidiary engine covering, confirm easily thus to extend to not by the electric wire of the position of carriage and subsidiary engine covering,, can reliably prevent to forget the installation and measuring device so confirm easily to be installed in the detector that carriage be can't see behind.

Claim 3 is vehicle internal-combustion engines according to

claim

1 and 2, and described cluster engine has the lip part by the bolt food tray, and described assembly department is formed near the part top of the outstanding described lip part of described carriage.

Like this, near the part in top that is formed with assembly department is the part that has improved rigidity by bolt, is the vibration of the detector of cause so reduce the vibration that produces with internal-combustion engine.And, lip part is outstanding towards carriage, so in the position of this lip part, the gap of cluster engine and carriage further diminishes, be difficult for entering from the water of upspringing of lip part below or gravelstone grain etc. from this gap, and they to touch the possibility of detector littler.

As a result, according to claim 3, on the basis of above-mentioned each effect of inventing, can also bring into play following effect.Promptly; cluster engine has the lip part by the bolt food tray; assembly department is formed near the part top of the outstanding lip part of carriage; reducing the vibration that produces with internal-combustion engine thus is the vibration of the detector of cause; so improve the durability of detector; when the detector detection position, its testing precision improves simultaneously, and further improves the effect that the protection detector is not damaged by water or gravelstone grain etc.

Description of drawings

Fig. 1 is the major component side view of the internal-combustion engine of embodiments of the invention.

Fig. 2 is the major component front view of the internal-combustion engine of Fig. 1.

Fig. 3 is that the subsidiary engine of the internal-combustion engine of Fig. 1 is the stereogram of compressor and carriage.

Fig. 4 be along the IV of Fig. 1 to the major component front view of bottom cylinder body monomer.

Fig. 5 is that V-V along Fig. 4 is to the sectional drawing of looking.

Symbol description

1 cylinder block; 2 bottom cylinder bodies; 3 food trays; 4 crankshafts; 5 chain guards; 6 alternators; 7 compressors; 8,9,10 crank belt pulleys; 11～13 driven pulleies; 14 driving belts; 15 automatic tensioners; 16,17,18,19,20 carriages; 21 main bodys; 22 surfaces; 23 back sides; 24,25 boss part; 26,27 fitting seats; 28～31 edge portions; 40 crank angle sensors; 41 inside parts; 42 external lateral portion; 43 electric wires; 44 coupling; 45 solid of rotation; 46 connect electric wire; 50 fitting seats; 51 through holes; 52 screws; The E internal-combustion engine; The Eb cluster engine; B1～B6 bolt; The Lc rotating center; A1, A2 direction; T subsidiary engine driving mechanism; The R stiffening rib; The S recess.

Embodiment

Below, with reference to Fig. 1～Fig. 5 embodiments of the invention are described.

With reference to Fig. 1, Fig. 2, the internal-combustion engine E of embodiments of the invention is mounted in the water-cooled series connection four-cylinder Otto (cycle) engine on the vehicle, have cluster engine Eb, this cluster engine Eb has: be formed with and be used for the cylinder block 1 that chimeric piston makes its 4 cylinders that can slide; Be fixedly connected on the bottom cylinder body 2 of cylinder block 1 lower end by a plurality of bolt B 1; Be fixedly connected on the food tray 3 of bottom cylinder body 2 lower ends by a plurality of bolt B 2.

Cylinder block 1 and bottom cylinder body 2 engage with the state that two mating face 1al, 2al are bonded with each other by bolt B 1 being formed with cylinder block 1 and the lip part 1a of the mating face 1al of bottom cylinder body 2 and the lip part 2a of the mating face 2al that is formed with bottom cylinder body 2 and cylinder block 1.Therefore, being formed with bolt B 1 at bottom cylinder body 2 inserts a plurality of boss part 2c of general through hole and extends to form downwards from lip part 2a.

Equally, bottom cylinder body 2 and food tray 3 are being formed with bottom cylinder body 2 and the lip part 2b of the mating face 2bl of food tray 3 and the lip part 3a of the mating face 3al that is formed with food tray 3 and bottom cylinder body 2, by bolt B 2, the state that is bonded with each other with two mating face 2bl, 3al engages.Therefore, being formed with a plurality of boss part 2d that bolt B 2 screws in the screw of usefulness at bottom cylinder body 2 forms from lip part 2b is outstanding upward.

Be housed in the crankshaft 4 in the crank chamber that forms by piston skirt 1L that constitutes overskirt type cylinder block 1 bottom and bottom cylinder body 2, between cylinder block 1 and bottom cylinder body 2, supporting and to rotate, so that on the plane that comprises mating face 1al, 2al, have its rotation centerline Lc by main bearing.And, be connected firing pressure that described each piston on the crankshaft 4 produces by the mixed burning of gas by the firing chamber by connecting rod and driving and carry out back and forth movement, drive crankshaft 4 rotations.

And,, be that right wall right-hand of right-hand outer wall is provided with valve with driving mechanism (not shown) in the side of the direction A1 that constitutes rotation centerline Lc at cylinder block 1 and bottom cylinder body 2.This valve has the timing chain of the camshaft of the motivational drive valve device that utilizes crankshaft 4 with driving mechanism, and this valve device is used to open and close Aspirating valves and the outlet valve that is located at the cylinder head that is engaged in cylinder block 1 upper end.And, be bonded on each right wall of cylinder block 1, bottom cylinder body 2 and described cylinder head, the lip part 3a of food tray 3 by a plurality of bolts (not shown) as covering the chain guard 5 of this valve with the guard shield of driving mechanism.

In addition, in this embodiment, consistent all around with the vehicle that internal-combustion engine E is installed all around.

The outside at chain guard 5, right-hand at the right-hand member of cluster engine Eb, a plurality of subsidiary engines of the motivational drive internal-combustion engine E of configuration using crankshaft 4 are the compressor 7 of alternator 6, aircondition, cooling waterpump (not shown) and the hydraulic power steerig subsidiary engine driving mechanism T with oil hydraulic pump (not shown).Subsidiary engine driving mechanism T has: be bonded on the crank belt pulley 10 on right-hand shaft end of the crankshaft that connects chain guard 5 and extend 4; Be bonded on the driven pulley 11 on the running shaft of alternator 6; Be bonded on the driven pulley 12 on the running shaft of compressor 7; Be bonded on the driven pulley 13 on the running shaft of described cooling waterpump and be bonded on driven pulley on the running shaft of described oil hydraulic pump; Be erected at the driving belt 14 on these belt pulleys 11～13 and the crank belt pulley 10; Give the automatic tensioner 15 of tension force to driving belt 14.

In these subsidiary engines, constitute antetheca the place ahead of the outer wall of cluster engine Eb, in position near subsidiary engine driving mechanism T, configuration alternator 6 and the compressor 7 that is positioned at these alternator 6 belows.Particularly, alternator 6 is installed in by bolt B 3 on the installation base 1b of the antetheca 1w that is formed at the outer wall that constitutes cylinder block 1, and compressor 7 is installed in the antetheca 2w of the outer wall that constitutes bottom cylinder body 2 by carriage 20 and constitutes on the antetheca 3w of outer wall of food tray 3.Herein, each

antetheca

1w, 2w, 3w are the place ahead outer walls on fore-and-aft direction, or when the cylinder-bore axis direction of described cylinder is watched and the outer wall in side the place ahead of the direction A2 of rotation centerline Lc quadrature, constitute the described outer wall of cluster engine Eb.

Again in the lump with reference to Fig. 3, Fig. 4, radially (following simply be called " radially ") at crankshaft 4, between the antetheca 3w and compressor 7 of the antetheca 2w of bottom cylinder body 2 and food tray 3, and cross over the carriage 20 that two

antetheca

2w, 3w install and have: in the rectangular plate shape main body 21 that is arranged radially between two

antetheca

2w, 3w and the compressor 7; Be the back side 23 towards the outstanding a plurality of stiffening rib R of bottom cylinder body 2 and food tray 3 radially from the one side of the cluster engine Eb side of main body 21.In addition, this radially can change in this embodiment and say to be Vertical direction A2 or fore-and-aft direction.

Main body 21 has: as the upper boss portion 24 of a pair of fixing part, its bolt B 4 with the screw 2el that makes a pair of fitting seat 2e that screws in the antetheca 2w that is formed on bottom cylinder body 2 is inserted logical through hole 24a; With the lower boss portion 25 as a pair of fixing part, its bolt B 4 with the screw 3el that makes a pair of fitting seat 3e that screws in the antetheca 3w that is formed on food tray 3 is inserted logical through hole 25a.And,, carriage 20 is bonded on bottom cylinder body 2 and the food tray 3 by these bolt B 4.

And main body 21 has a pair of top fitting seat 26 and a pair of bottom fitting seat 27 that is made of boss part, and this boss part has screw 26a, the 27a that compressor 7 is bonded on the bolt B 5 screw-in usefulness on the carriage 20 respectively.

In addition, main body 21 the rising wood 28 that is formed with upper boss portion 24 and top fitting seat 26 and be formed with lower boss portion 25 and the lower edge 29 of bottom fitting seat 27 between, profile along compressor 7, promptly form the flexure plane that constitutes by concave surface in surface 22 in the one side that radially becomes compressor 7 sides, this concave surface is made of the part of the cylndrical surface with axis parallel with rotation centerline Lc, to should surface 22 shape, the back side 23 forms the flexure plane that is made of the convex surface that becomes convex towards cluster engine Eb.

And, as being installed in cluster engine Eb, be used for detecting the status detection device of internal-combustion engine E, for the rotational speed of calculating internal-combustion engine E and the top dead center position that detects described piston, the crank angle sensor 40 that detects the rotational position of crankshaft 4 is installed on the outer wall as the lower area that is formed at cluster engine Eb, i.e. the fitting seat 50 of the assembly department on the antetheca 2w.

Herein, the described lower area of so-called cluster engine Eb is meant in cluster engine Eb, travelling state according to the vehicle that travels on various road surfaces such as flat road surface or tilted road surface, can be positioned at the part of rotation centerline Lc below, be that the water that splashes on the road surface when travelling splashes down or the big part of possibility of the bumps such as gravelstone grain of upspringing.And in this embodiment, the bottom cylinder body 2 and the food tray 3 that are positioned at the below, described plane that comprises mating face 1al, 2al belong to described lower area.

Stiffening rib R has the edge portion muscle that is located at the peripheral portion that rising wood 28, lower edge 29, right border portion 30 and left border portion 31 by main body 21 constitute (in addition, at the muscle R of edge portion of right border portion 30 shown in Fig. 1, Fig. 3, Fig. 5 ₃₀), and connect connecting tendon between 4

boss part

24,25.

With reference to Fig. 1, Fig. 2, Fig. 4, Fig. 5, fitting seat 50 is arranged at the position that covers at the carriage 20 that radially is installed in bottom cylinder body 2 and food tray 3.And, crank angle sensor 40 radially relatively the residing cluster engine side of cluster engine Eb of carriage 20 be the back side 23 sides, be configured between bottom cylinder body 2 and the carriage 20 and and be covered with by carriage 20, compressor 7 is configured in radially relatively that the opposition side of the residing side of cluster engine Eb of carriage 20 is the cluster engine opposition side, promptly surperficial 20 sides.

With reference to Fig. 4, Fig. 5, fitting seat 50 is positioned at, and radially, further from the position that the direction of carriage 20 retreats, part forms as one with bottom cylinder body 2 near above the lip part 2b than lip part 2b.Part is positioned at the high rigid element that has improved rigidity by bolt B 2 (with reference to Fig. 2) near this top, and be by lip part 2b is radially being given prominence to towards carriage 20, in the scope radially that is covered by carriage 20, water of upspringing from lip part 2b below or gravelstone grain etc. are difficult for entering the part between bottom cylinder body 2 and the carriage 20.

And the bolt B 6 that the aftermentioned inside part that forms crank angle sensors 40 at the attachment face 51 of fitting seat 50 inserts the through hole 52 of usefulness and is used to install crank angle sensor 40 screws in the screw 53 of usefulness.

Crank angle sensor 40 has and faces the inside part 41 in the described crank chamber in antetheca 2w inboard and be positioned at the antetheca 2w outside simultaneously towards the outstanding external lateral portion 42 of carriage 20.

The front end 41a of inside part 41 is relative across micro-gap with projection 45a, this projection 45a be provided in a side of with crankshaft 4 engage and with a plurality of detected portion of the solid of rotation 45 of crankshaft 4 rotations.And, the testing signal that crank angle sensor 40 produces when relative with these projections 45a according to the detection unit that is located at front end 41a, the rotational position of detection crankshaft 4.

External lateral portion 42 has the 42b of mounting flange portion that contacts with 51 of attachment faces for crank angle sensor 40 is installed in fitting seat 50, the 42b of this mounting flange portion is fixed on the fitting seat 50 by bolt B 6, thereby crank angle sensor 40 is fixed on the bottom cylinder body 2.External lateral portion 42 radially near the part of main body 21 be front end 42a than more close main body 21 of the front end of stiffening rib R and adjacency, and be positioned at the recess S (with reference to Fig. 5) that forms by described periphery muscle and main body 21.

With reference to Fig. 2, connect an end of transmitting the electric wire 43 of described testing signal to electric control device (ECU) at external lateral portion 42.Electric wire 43 is configured to radially passing through between antetheca 2w and the carriage 20, and extend to the carriage 20 that when the place ahead is watched, is not installed in bottom cylinder body 2 and food tray 3 and be installed on the position that the compressor 7 on the carriage 20 covers, and has the exposed division 43a that is exposed to antetheca 2w the place ahead.And, is not connected coupling 44 in the other end of the exposed division 43a that is located at radially the antetheca 2w the place ahead that is covered by carriage 20 and compressor 7, by this coupling 44 be connected electric wire 46 connections.Electric wire 43 is that wire clamp is keeping by the holding member that is installed in the boss 2f (with reference to Fig. 4) that is formed at antetheca 2w by bolt between crank angle sensor 40 and coupling 44.

Below, the as above embodiment's of formation effect and effect are described.

The described lower area of the fitting seat 50 of crank angle sensor 40 at the cluster engine Eb of the internal-combustion engine E that is installed on vehicle is installed; be set at the position that the carriage 20 between bottom cylinder body 2 and food tray 3 and compressor 7 covers; wherein this lower area in the vehicle driving process, splash down water from the place ahead or the possibility of the gravelstone grain of upspringing from frontal crash etc. big; crank angle sensor 40 is configured between bottom cylinder body 2 and the carriage 20 and by carriage 20 in the bottom of carriage 20 cylinder body 2 sides and is covered with; compressor 7 is configured in the opposition side of the cluster engine Eb side of carriage 20; make the radial clearance of bottom cylinder body 2 and food tray 3 and carriage 20 less than the radial clearance between bottom cylinder body 2 and food tray 3 and the compressor 7 thus; water of being upspring or gravelstone grain etc. are difficult for the cluster engine Eb side that enters carriage 20 from this close gap in the process of moving; and carriage 20 can stop the water of upspringing or gravelstone grain etc.; be to use as this curtain-shaped cover member and be used for compressor 7 is installed in subsidiary engine on bottom cylinder body 2 and the food tray 3 with carriage 20; so do not need new parts as curtain-shaped cover member; can not increase part count, protect damages such as water that crank angle sensor 40 do not upspring or gravelstone grain more reliably.

Be that front end 42a likens the more close main body 21 of front end into the described edge portion muscle of the stiffening rib R of carriage 20 to radially in the external lateral portion 42 of crank angle sensor 40 near the part of the main body 21 of carriage 20; and be positioned at the recess S that forms by described edge portion's muscle and main body 21; crank angle sensor 40 and carriage 20 can radially closer disposed; so can further dwindle the gap of bottom cylinder body 2 and food tray 3 and carriage 20; make that water or gravelstone grain etc. are more difficult to be entered from this gap, improve the effect that protection crank angle sensor 40 is not damaged by water or gravelstone grain etc.

The electric wire 43 of connecting crank rotary angle transmitter 40 extends to not by the position of carriage 20 and compressor 7 coverings, even thereby at bottom cylinder body 2 only under the state of mounting bracket 20 or mounting bracket 20 and compressor 7, under the situation that crank angle sensor 40 is installed, confirm easily to extend to not by the electric wire 43 of the position of carriage 20 and compressor 7 coverings, so the crank angle sensor 40 that easy affirmation is installed in the behind of carriage 20 and can't see can reliably prevent to forget installation crank angle sensor 40.

The coupling 44 that connects electric wire 43 is configured in not by the position of carriage 20 and compressor 7 coverings, and be the state that is exposed to antetheca the place ahead, thereby being connected and separating of coupling 44 when carrying out internal-combustion engine E when assembling or maintenance easily and electric wire 43 improves operation.

Bottom cylinder body 2 has the lip part by bolt food tray 3, fitting seat 50 is formed near the part top of the lip part that carriage 20 is given prominence to, part is the part that has improved rigidity by bolt near the described top, so reducing the vibration that produces with internal-combustion engine E is the vibration of the detector of cause, in the durability that improves detector, improve the testing precision of the crank angle sensor 40 of the position of detecting detected portion thus.And; because lip part is outstanding towards carriage 20; in this lip part position; the gap of bottom cylinder body 2 and carriage 20 further diminishes; enter from this gap so water of upspringing from the lip part below or gravelstone grain etc. are more difficult; the possibility that they touch detector is littler, therefore further improves the effect that protection crank angle sensor 40 is not damaged by water or gravelstone grain etc.

And, fitting seat 50 is radially, form on the position that the direction of carriage 20 retreats than lip part 2b, near and the part in the described top that is formed on lip part 2b, thus, relative fitting seat 50, lip part 2b becomes the shielding portion of the water that splashes relatively, so can prevent effectively that the boundary portion that sealing enters fitting seat 50 and crank angle sensor 40 is the face contacting part of attachment face 51 and the 42b of mounting flange portion.

Below, the change structure with the embodiment behind a part of structure modify of described embodiment is described.

Cluster engine Eb can be made of the dark skirt type cylinder block and the food tray that do not have bottom cylinder body 2.Fitting seat 50 can be located on the food tray.In addition, the subsidiary engine that is installed in carriage 20 can be the subsidiary engine except that compressor 7.

Detector is crank angle sensor 40 in described embodiment, but also can be the sensor or the switch of detected pressures or temperature etc.And the assembly department that detector is installed can be the part that has by screwing in the screw that through hole that this detector uses constitutes.

Internal-combustion engine also can be the multi-cylinder engine beyond single cylinder or four cylinders.

Claims

1. a vehicle internal-combustion engine has: supporting rotatable crankshaft by cluster engine; Be installed in the subsidiary engine of described cluster engine by carriage; Be installed in the assembly department of the outer wall that is formed at described cluster engine and be exposed to outside detector, it is characterized in that,

Described assembly department is at the lower area of described cluster engine, be located at the position that is covered by the described carriage between described cluster engine and described subsidiary engine, described detector is configured between described cluster engine and the described carriage in the cluster engine side of described carriage, and covered by described carriage, described subsidiary engine is configured in the cluster engine opposition side of described carriage.

2. vehicle internal-combustion engine according to claim 1 is characterized in that, the electric wire that connects described detector extends to not by the position of described carriage and the covering of described subsidiary engine.

3. vehicle internal-combustion engine according to claim 1 and 2 is characterized in that described cluster engine has the lip part by the bolt food tray, and described assembly department is formed near the part top of the outstanding described lip part of described carriage.