CN1100202C

CN1100202C - Rotational angle detecting apparatus of internal combustion engine

Info

Publication number: CN1100202C
Application number: CN99108007A
Authority: CN
Inventors: 田中竜司; 太田胜也; 细井政广; 伊藤崇; 中村隆; 补永和博; 山田真嗣
Original assignee: Suzuki Motor Corp
Current assignee: Suzuki Motor Corp
Priority date: 1998-06-04
Filing date: 1999-06-04
Publication date: 2003-01-29
Anticipated expiration: 2019-06-04
Also published as: JPH11351008A; CN1242470A; JP3651555B2

Abstract

To arrange a detecting means for detecting a rotation angle adjacent to an identification body by providing the detecting means mounted to an engine structural body so that it is inserted into a through hole of a dermal body facing an identifying portion and is opposite to an identifying surface. In a rotation angle detecting device 52, an identifying surface 56 of a sensing rotor 54 integrally provided for an intake side mounting portion 32 of an intake cam shaft 16 is provided with an identifying portion corresponding to a rotation angle of the intake cam shaft 16 so as to face a chain cover 50. A sensor 60 for identifying the identifying portion and detecting the rotation angle of the intake cam shaft 16 is mounted to a cylinder head 6 so that the sensor is inserted into a through hole of the chain cover 50 facing the sensing rotor 54 and is opposite to the identifying portion. Thus, because the identifying portion is provided using the identifying surface 56 orthogonal to an axis line of the intake cam shaft 16, the rotation angle can be detected by providing a slightly deep identifying portion in the sensing rotor 54 integrally provided for the intake side mounting portion 32, and variation of a distance between the sensor 60 and the identifying portion can be reduced.

Description

The rotational angle detecting apparatus of internal-combustion engine

The present invention relates to a kind of rotational angle detecting apparatus of internal-combustion engine, relate in particular to a kind of such internal-combustion engine rotational angle detecting apparatus: in this device, the physical dimension of transmitting part that rotatablely moves that can prevent to be provided with the identification part that is used for measuring angle of swing increases, the restriction that minimizing is arranged tools for measurement, reduce the vibration of cover part, improve the setting accuracy of identification part with respect to running shaft, reduce many steps of work in combination, reduce weight, the minimizing expense, prevent the error measurement angle of swing, improve the reliability of angle of swing control, and this rotational angle detecting apparatus also can be realized the function of existing rotational angle detecting apparatus.

A kind of internal-combustion engine that is installed on the Motor Vehicle, this internal-combustion engine is provided with rotational angle detecting apparatus, determines the cylinder of motor and measures rotational speed thereby this rotational angle detecting apparatus is used for measuring the angle of swing of running shaft.Resemble this rotational angle detecting apparatus, Figure 23 shows wherein a kind of to Figure 25.In Figure 23, label 102 expression internal-combustion engines, label 104 expression bent axles, and bent axle is a running shaft, and label 106 expression crank Timing Belt wheels, crank Timing Belt wheel is the transmission part that rotatablely moves, label 108 expression rotational angle detecting apparatus.Internal-combustion engine 102 is arranged to connect a Timing Belt wheel 106 on distolateral at axial one of bent axle 104, and this Timing Belt wheel 106 is surrounded with the Timing Belt (not shown), and Timing Belt is the transmission part that rotatablely moves of annular, and bent axle 104 is in axial direction supported by cylinder body 110, and cylinder body 110 is cluster engine members.

Rotational angle detecting apparatus 108 is provided with sensing rotor 112, and sensing rotor 112 is the identification parts that are used for discerning angle of swing, and sensing rotor 112 is outstanding from the side that is connected to the Timing Belt wheel 106 on the bent axle 104.As Figure 24 and shown in Figure 25, sensing rotor 112 is provided with projection 116 along the circumferential edges 114 that diametric(al) is projected into the outside, and projection 116 is formed the corresponding to identifying part of angle of swing with bent axle 104.

Rotational angle detecting apparatus 108 is provided with the sensor 118 that constitutes tools for measurement, and this tools for measurement is measured the angle of swing of bent axle 104 by identification projection 116.Sensor 116 is arranged to be connected on the cylinder body 110 around the circumferential edges 114 of sensing rotor 112, and this sensor 116 is towards the center on the diametric(al) and be arranged on the downside of bent axle 104.Rotational angle detecting apparatus 108 is measured degree in crank angle by sensor 118 identifications with the corresponding to projection 116 of angle of swing, and degree in crank angle is an angle of swing.

In addition, as rotational angle detecting apparatus, Figure 26 and Figure 27 show one.Figure 26 is arranged to be connected a sensing rotor 212 with rotational angle detecting apparatus 208 shown in Figure 27 on the axle head of camshaft 204, and camshaft 204 is running shafts.Sensing rotor 212 is provided with the projection of giving prominence to from circumferential edges 214 216, and this projection 216 is consistent with the angle of swing of camshaft 204.

Rotational angle detecting apparatus 208 is arranged to a sensing housing 220 and is connected to (not shown) on the cylinder cap, and this sensing housing 220 covers sensing rotor 212, and cylinder cap is the component parts of motor.Sensor 218 is measured the angle of swing of camshaft 204 by identification projection 216, and sensor 218 is arranged to be connected on the sensing housing 220 around the circumferential edges 214 of sensing rotor 212, and this sensor 218 is towards diametric center and be arranged on the side of camshaft 204.Rotational angle detecting apparatus 208 is measured cam angle degree by sensor 218 identification projections 216, and cam angle degree is an angle of swing, and projection 216 is consistent with angle of swing.

In addition, as rotational angle detecting apparatus, Figure 28 shows one.Rotational angle detecting apparatus 308 shown in Figure 28 is arranged to sensing rotor 312 is connected on the side of Timing Belt wheel 306 by connecting bolt 322, Timing Belt wheel 306 is the transmission parts that rotatablely move that are connected on the axle head of camshaft 304, and camshaft 304 has constituted revolving part, and rotational angle detecting apparatus 308 is arranged to along diametric(al) from sensing rotor 312 the circumferential edges 314 corresponding to projection 316 of angle of swing to outstanding and camshaft 304 outside.

Rotational angle detecting apparatus 308 is provided with sensor 318, and sensor 318 is measured the angle of swing of camshaft 304 by identification projection 316.Sensor 318 is connected on the cylinder cap, but does not illustrate, and sensor 318 is 312 center and be arranged in a side place of camshaft 304 along diametric(al) towards sensing rotor.Rotational angle detecting apparatus 308 is measured cam angle degree by sensor 318 identifications with the corresponding to projection 316 of angle of swing, and cam angle degree is an angle of swing.

Internal-combustion engine rotational angle detecting apparatus like this, in Japan Patent JP-A-8-14814 and JP-A-8-144799, disclose a kind of, in this rotational angle detecting apparatus: integrally form a housing and constitute an assembly parts thereby be configured to discern the sensing rotor of identification part of angle of swing and sensor, and this assembly parts and internal-combustion engine are combined into integral body.

In addition, rotational angle detecting apparatus as internal-combustion engine, in Japan Patent JP-A-8-121206, JP-A-8-312512 and JP-A-9-280084, disclose a kind of, in this rotational angle detecting apparatus: the sensor that constitutes tools for measurement is connected on cylinder cap or the top cover and the center on the diametric(al) of sensing rotor, and this sensing rotor is configured to discern the identification part of angle of swing.

In addition, rotational angle detecting apparatus as internal-combustion engine, in Japan Patent JP-A-5-180613, disclose a kind of, in this rotational angle detecting apparatus: be arranged on the inner side surface of edge section of cam pulleys with the corresponding to identification part of angle of swing, and this cam pulleys is connected on the camshaft, and the sensor that constitutes tools for measurement is connected on the top cover and towards the inner side surface of the edge section that is provided with identifying part.

In addition, rotational angle detecting apparatus as internal-combustion engine, in Japan Patent JP-A-8-135478, disclose a kind of, in this rotational angle detecting apparatus: the sensing rotor that is configured to discern the identifying part of angle of swing is press-fitted and is fixed on the Timing Belt wheel, in Japan Patent JP-A-9-88626, disclose a kind of, in this rotational angle detecting apparatus: the sensor that constitutes tools for measurement be mounted on the camb cap that is connected to camshaft and towards with the corresponding to projection of the angle of swing at the cam pulleys back side.

But, arrive each traditional rotational angle detecting apparatus shown in Figure 28 according to Figure 22, the identification part that is used for discerning angle of swing is arranged on and is connected to rotatablely moving on the running shaft and transmits on the side of part, and tools for measurement is arranged around the circumferential edges of identification part and towards along the center on the diametric(al).

Therefore, be provided with shortcoming of existence on the transmission part that rotatablely moves of identification part: rotatablely moving, it is bigger to transmit the part size, and this makes weight increase, and the length that makes running shaft in axial direction go up increases, so has limited the layout of tools for measurement.

In addition, when the rotatablely moving transmission part on being set to running shaft is sprocket wheel, need be arranged to be separated with the corresponding to identifying part of angle of swing with the toothed portion of sprocket wheel, so that can not be identified as the toothed portion that is arranged on the sprocket periphery edge and the corresponding to identifying part of angle of swing mistakenly, identifying part is arranged on the circumferential edges of the identification part that is used for discerning angle of swing.

Therefore, to above-mentioned similar, have a shortcoming: be provided with rotatablely moving of identification part and transmit part and make the axial length of running shaft increase, the size of transmitting part that rotatablely moves has increased, so weight increased, and has limited the layout of tools for measurement.

In addition, when being connected to rotatablely move, transmits on the part one that is used for discerning angle of swing independent identification part, and when the transmission part that rotatablely moves is connected to running shaft, have a problem: since with respect to running shaft connect rotatablely move the positional error of transmitting part with transmit part with respect to rotatablely moving and be connected the positional error of discern part, so reduced be used for discerning angle of swing the setting accuracy of identification part relative rotation axi.

Therefore, be set on the identification part, with the corresponding to identifying part of angle of swing on have a shortcoming: can cause the positional deviation of angle of swing, cause that tools for measurement measures angle of swing mistakenly, thereby reduced the reliability of angle of swing control.

Therefore, in order to overcome above-mentioned shortcoming, the invention is characterized in: be surrounded with rotatablely moving of ring rotation transmission of movement part transmit part be arranged to be connected on the axial direction of running shaft one distolateral on, and running shaft is supported by the cluster engine member of internal-combustion engine vertically, be provided with cover spare, this cover spare covers ring rotation transmission of movement part and the transmission part that rotatablely moves, this transmission part that rotatablely moves is connected on the cluster engine member, an integral body is arranged in the attachment portion of transmitting part that rotatablely moves that is used for discerning the identification part of angle of swing and is connected on the running shaft, be arranged on the side of the identification part that covers the part opposite side with the corresponding to identifying part of the angle of swing of running shaft, be provided with the tools for measurement of assigning to measure the angle of swing of running shaft by the identification identification part, in the cover spare through hole that tools for measurement is inserted identification part opposite side, thereby be arranged to tools for measurement be connected on the cluster engine member relative with identifying part.

Rotational angle detecting apparatus is characterised in that: a side of rotational angle detecting apparatus identification part is provided with the identified surface relative with covering part, and this identification part is arranged to an integral body with the attachment portion of transmitting part that rotatablely moves, and the identifying part relative with tools for measurement is set on the circumferencial direction of identified surface.

Rotational angle detecting apparatus is characterised in that: a side of rotational angle detecting apparatus identification part is provided with the identified surface relative with covering part, and this identification part is arranged to an integral body with the attachment portion of transmitting part that rotatablely moves, the recessed identifying part relative with tools for measurement is set on the circumferencial direction of identified surface, rotational angle detecting apparatus is characterised in that: rotational angle detecting apparatus is provided with attachment hole and the identification part that is positioned on the attachment portion of transmitting part that rotatablely moves, an integral body is arranged in this identification part and attachment portion, that side of the identification part of rotational angle detecting apparatus cover part opposite side is provided with identified surface, the circumferencial direction of identified surface is provided with the recessed identifying part relative with tools for measurement, in attachment hole, be provided with the slot-open-section of location usefulness along diametric(al), this slot-open-section is towards the axial direction of running shaft and extend on the identified surface, and attachment hole is arranged on the place, inboard of identifying part, rotational angle detecting apparatus is provided with the slot-open-section that is arranged on the diameter line, and the diameter line of the identifying part on diameter line and one of them identified surface is identical, rotational angle detecting apparatus is characterised in that: rotational angle detecting apparatus is provided with attachment hole and the identification part that is positioned on the attachment portion of transmitting part that rotatablely moves, an integral body is arranged in this identification part and attachment portion, one side of the identification part of rotational angle detecting apparatus cover part opposite side is provided with identified surface, the circumferencial direction of identified surface is provided with the recessed identifying part relative with tools for measurement, in attachment hole, be provided with the slot-open-section of location usefulness along diametric(al), this slot-open-section is towards the axial direction of running shaft and extend on the identified surface, and attachment hole is arranged on the place, inboard of identifying part, slot-open-section is arranged to be arranged on the diameter line, and the diameter line of the identifying part on this diameter line and one of them identified surface is identical, be provided with therewith so that for the circumferencial direction of identified surface the width of slot-open-section become with identical with the width of identifying part.

Rotational angle detecting apparatus is characterised in that: rotational angle detecting apparatus is provided with attachment hole and the identification part that is positioned on the attachment portion of transmitting part that rotatablely moves, an integral body is arranged in this identification part and attachment portion, one side of the identification part of rotational angle detecting apparatus cover part opposite side is provided with identified surface, the circumferencial direction of identified surface is provided with relative with tools for measurement, along the recessed identifying part of attachment hole, in attachment hole, be provided with the slot-open-section of location usefulness, this slot-open-section is towards the axial direction of running shaft and extend on the identified surface, and slot-open-section is arranged the identifying part that covers on folded one of them identified surface, rotational angle detecting apparatus is characterised in that: rotational angle detecting apparatus is provided with attachment hole and the identification part that is positioned on the attachment portion of transmitting part that rotatablely moves, an integral body is arranged in this identification part and attachment portion, one side of the identification part of rotational angle detecting apparatus cover part opposite side is provided with identified surface, the circumferencial direction of identified surface is provided with the recessed identifying part relative with tools for measurement, in attachment hole, be provided with the slot-open-section of location usefulness along diametric(al), this slot-open-section is towards the axial direction of running shaft and extend on the identified surface, and attachment hole is arranged on the place, inboard of identifying part, the circumferencial direction of rotational angle detecting apparatus identified surface is provided with the step portion that is toroidal, this step portion extends to the outermost end and a recessed degree of depth of slot-open-section from attachment hole along diametric(al), this degree of depth is equal to or greater than the degree of depth of identifying part.

Rotational angle detecting apparatus is characterised in that: a side of rotational angle detecting apparatus identification part is provided with the identified surface that is plane shape, the intersect vertical axis of this identified surface and running shaft, and this identification part is arranged to an integral body with the attachment portion of transmitting part that rotatablely moves of cover part opposite side, the circumferencial direction that is the identified surface of plane shape is provided with the recessed identifying part relative with tools for measurement, rotational angle detecting apparatus is characterised in that: a side of rotational angle detecting apparatus identification part is provided with the identified surface of tapered shape, the axis oblique of this identified surface and running shaft, and this identification part is arranged to an integral body with the attachment portion of transmitting part that rotatablely moves of cover part opposite side, and the circumferencial direction of the identified surface of tapered shape is provided with the recessed identifying part relative with tools for measurement.

Fig. 1 is the sectional view that is provided with the internal-combustion engine of the rotational angle detecting apparatus of representing first embodiment of the invention;

Fig. 2 is the profile front view of internal-combustion engine;

Fig. 3 is the front view of air inlet sprocket wheel;

Fig. 4 is the sectional drawing of air inlet sprocket wheel;

Fig. 5 is the sectional view that amplifies the major component of air inlet sprocket wheel;

Fig. 6 is the perspective view of assembling rotational angle detecting apparatus;

Fig. 7 is the profile sectional view of rotational angle detecting apparatus;

Fig. 8 is the schematic representation of expression sensor with respect to the relation between the rectangular wave of the position of identifying part, the voltage that is produced and output.

Fig. 9 is the sectional view that is provided with the internal-combustion engine of the rotational angle detecting apparatus of representing second embodiment of the invention;

Figure 10 is the profile front view of internal-combustion engine;

Figure 11 is the front elevation of air inlet sprocket wheel;

Figure 12 is the profile sectional view of rotational angle detecting apparatus;

Figure 13 is the sectional view that amplifies the major component of air inlet sprocket wheel;

Figure 14 is the schematic representation of expression from the rectangular wave of sensor output;

Thereby Figure 15 is the expression sensor is used as the schematic representation that identifying part is measured the rectangular wave of output to the air inlet side channel notch portion of location usefulness;

Figure 16 is the front view of air inlet sprocket wheel that is provided with the rotational angle detecting apparatus of third embodiment of the invention;

Figure 17 is the front view of air inlet sprocket wheel that is provided with the rotational angle detecting apparatus of fourth embodiment of the invention;

Figure 18 is the front view of air inlet sprocket wheel that is provided with the rotational angle detecting apparatus of fifth embodiment of the invention;

Figure 19 is the rotational angle detecting apparatus profile sectional drawing of sixth embodiment of the invention;

Figure 20 is the rotational angle detecting apparatus profile sectional drawing of seventh embodiment of the invention;

Figure 21 is the rotational angle detecting apparatus profile sectional drawing of eighth embodiment of the invention;

Figure 22 is the rotational angle detecting apparatus profile sectional drawing of ninth embodiment of the invention;

Figure 23 is the bent axle sectional view that is provided with the rotational angle detecting apparatus of expression conventional example;

Figure 24 is the rear view of crank and chain-wheel;

Figure 25 is the sectional view of crank and chain-wheel;

Figure 26 is the perspective view of the rotational angle detecting apparatus of other conventional example of assembling expression;

Figure 27 is the sectional view that concerns between expression sensing rotor and the sensor; And

Figure 28 is the perspective view that the assembling expression is still the rotational angle detecting apparatus of other conventional example.

The internal-combustion engine rotational angle detecting apparatus of the present invention attachment portion of transmitting part that rotatablely moves is provided with the identification part that is used for discerning angle of swing, this rotatablely moves and transmits on the end on the axial direction that part is connected to the internal-combustion engine running shaft, that side of identification part of rotational angle detecting apparatus cover part opposite side is provided with identifying part, this identifying part is consistent with the angle of swing of running shaft, by these, the physical dimension that can not causing rotatablely moves transmits part increases and running shaft increases along the length on the axial direction, the tools for measurement of assigning to measure the angle of swing of running shaft by the identification identification part is connected on the cluster engine member, therefore thereby to be inserted through the cover spare patchhole of identification part opposite side relative with identifying part for tools for measurement, therefore prevented the vibration of cover part, the layout of tools for measurement is favourable, tools for measurement arrange the most approaching identification part.

The sidepiece of above-mentioned identification part identification part is provided with identified surface, and this identification part is arranged to an integral body with the attachment portion of transmitting part that rotatablely moves of cover part opposite side, the identifying part relative with tools for measurement is set on the circumferencial direction of identified surface, by these, the physical dimension that can not causing rotatablely moves transmits part increase and running shaft along the increase of the length on the axial direction, tools for measurement arrange the most approaching identification part.

In addition, rotational angle detecting apparatus is provided with attachment hole and the identification part that is positioned on the attachment portion of transmitting part that rotatablely moves, this transmission part that rotatablely moves is arranged to an integral body with the identification part, that side of the identification part of rotational angle detecting apparatus cover part opposite side is provided with identified surface, the circumferencial direction of identified surface is provided with relative with tools for measurement, recessed identifying part, therefore when the transmission part that rotatablely moves is connected on the running shaft, connect frame and do not disturb identifying part, the transmission part that rotatablely moves can easily be connected the there, and has reduced weight.

In this case, rotational angle detecting apparatus is provided with the slot-open-section of location usefulness in attachment hole along diametric(al), this slot-open-section is towards the axial direction of running shaft and extend to identified surface, this attachment hole is arranged in the inboard of identifying part, rotational angle detecting apparatus is provided with the notch that is arranged on the diametric(al) line, this diameter line is identical with the diametric(al) line of the identifying part of one of them identified surface, by these, it is identical with the normal identification signal of identifying part that tools for measurement is identified as the signal of identifying part to notch mistakenly, therefore can not measure angle of swing mistakenly.In addition, slot-open-section is arranged to be arranged on the same diameter line of identifying part of one of them identified surface, since this be provided with so that for the circumferencial direction of identified surface the width of slot-open-section identical with the width of identifying part, by these, it is identical with the width of the normal identification signal of identifying part to make that tools for measurement is identified as the deration of signal of identifying part to slot-open-section mistakenly, therefore can prevent to measure mistakenly angle of swing more for certain.

In addition, the circumferencial direction of rotational angle detecting apparatus identified surface is provided with along the recessed identifying part of attachment hole, in attachment hole, be provided with the slot-open-section of location usefulness, this slot-open-section is towards the axial direction of running shaft and extend on the identified surface, this slot-open-section is arranged to cover the identifying part of folded one of them identified surface, by these, slot-open-section can be used as one of them identifying part, assign to reduce many machinings by reducing the identification part, make tools for measurement become and align the not identification of part of general knowledge, therefore can not measure angle of swing mistakenly the identification of slot-open-section.

In addition, rotational angle detecting apparatus is provided with the slot-open-section of location usefulness in attachment hole along diametric(al), this slot-open-section is towards the axial direction of running shaft and extend on the identified surface, and this attachment hole is arranged on the inboard of identifying part, the circumferencial direction of rotational angle detecting apparatus identified surface is provided with the cascade different piece that is ring, this cascade different piece extends to the outermost end of slot-open-section from attachment hole along diametric(al), an and recessed degree of depth, this degree of depth is equal to or greater than the degree of depth of identifying part, by these, under identical condition, can determine to be provided with identified surface identifying part part and the part of the identifying part of identified surface is not set, therefore can prevent wrong identification.

Also have, that side of the identification part of rotational angle detecting apparatus cover part opposite side is provided with the identified surface that is plane shape, the intersect vertical axis of this identified surface and running shaft, the circumference that rotational angle detecting apparatus is the identified surface of plane shape is provided with recessed identifying part, this identifying part is relative with tools for measurement, by these, the layout of tools for measurement is favourable, tools for measurement arrange the most approaching identification part, in addition, the identified surface of tapered shape is arranged on that side of identification part of cover part opposite side, and the axis oblique of the identified surface of tapered shape and running shaft, the circumferencial direction of the identified surface of tapered shape is provided with recessed identifying part, this identifying part is relative with tools for measurement, by these, can shorten from the length of the outstanding tools for measurement of cover part, so rotational angle detecting apparatus is arranged very compactly.

Provide being explained as follows of the embodiment of the invention with reference to accompanying drawing.Fig. 1 represents the first embodiment of the present invention to Fig. 8.In Fig. 1 and Fig. 2, label 2 expressions have the internal-combustion engine of some cylinders.Internal-combustion engine 2 is furnished with cylinder body 4, cylinder cap 6, top cover 8 and lower case 10.

According to internal-combustion engine 2, in cylinder body 4, bent axle 12 is running shafts, and this bent axle 12 is supported by bottom drain pan 10 in the axial direction, and in axial direction an end of bent axle 12 and crank and chain-wheel 14 link together, and this crank and chain-wheel is the transmission part that rotatablely moves.

In addition, according to internal-combustion engine 2, in cylinder cap 6, both have formed running shaft admission cam shaft 16 and exhaust cam shaft 18, and each free intake cam lid and exhaust cam cover (not shown) and support in the axial direction.One distolateral air inlet side connecting wheel hub portion 20 and the exhaust side connecting wheel hub portion 22 of being provided with of admission cam shaft 16 and exhaust cam shaft 18 axial directions, air inlet side connecting wheel hub portion 20 and exhaust side connecting wheel hub portion 22 are provided with the air inlet side through hole 24 and the exhaust side through hole 26 of location usefulness.

The air inlet side connecting wheel hub portion 20 and the exhaust side connecting wheel hub portion 22 of admission cam shaft 16 and exhaust cam shaft 18 are connected with air inlet sprocket wheel 28 and exhaust sprocket 30 separately, and air inlet sprocket wheel 28 and exhaust sprocket 30 both formed the transmission part that rotatablely moves.Air inlet sprocket wheel 28 and exhaust sprocket 30 are provided with air inlet side attachment portion 32 and exhaust side attachment portion 34 separately, air inlet sprocket wheel 28 and exhaust sprocket 30 also are provided with air inlet side attachment hole 36 and exhaust side attachment hole 38, and air inlet side attachment hole 36 and exhaust side attachment hole 38 are fixed and be press fitted on air inlet side connecting wheel hub portion 20 and the exhaust side connecting wheel hub portion 22.Be flute profile, the air inlet side channel notch portion 40 of locating usefulness and exhaust side slot-open-section 42 axial direction, and be installed in air inlet side attachment hole 36 and the exhaust side attachment hole 38 towards admission cam shaft 16 and exhaust cam shaft 18.

Be surrounded with timing chain 44 on crank and chain-wheel 14, air inlet sprocket wheel 28 and exhaust sprocket 30, timing chain 44 is the transmission parts that rotatablely move of annular.Timing chain 44 provides a predetermined tension force to install by chain stretching device 46 and chain retainer 48, this timing chain 44 is delivered to admission cam shaft 16 and exhaust cam shaft 18 to the rotating force of bent axle 12, thereby admission cam shaft 16 and exhaust cam shaft 18 are rotated synchronously with bent axle 12.

As shown in Figure 1, constitute the chain guard 50 that covers part and cover crank and chain-wheel 14, air inlet sprocket wheel 28 and exhaust sprocket 30 and timing chain 44.Chain guard 50 is connected on the cylinder cap 4 and cylinder body 6 on the end on the axial direction that is positioned at bent axle 12.

Internal-combustion engine 2 is provided with rotational angle detecting apparatus 52, this testing apparatus 52 be used for measuring the angle of swing of bent axle 12 or be used for measuring constitute running shaft admission cam shaft 16 or the angle of swing of exhaust cam shaft 18.First embodiment's rotational angle detecting apparatus 52 is measured the angle of swing of admission cam shaft 18.

Shown in Fig. 3 to 5, at 32 places, air inlet side attachment portion that are connected to the air inlet sprocket wheel 28 on the admission cam shaft 14, rotational angle detecting apparatus 52 is mounted to an integral body with sensing rotor 54, and this sensing rotor 54 is configured to discern the identification part of angle of swing.The sensing rotor 54 of being arranged to an integral body with air inlet side attachment portion 32 is provided with above-mentioned air inlet side attachment hole 36.As shown in Figure 4, sensing rotor 54 is set on the offside of chain guard 50.

Identified surface 56 is installed on sensing rotor 54 those sides of chain guard 50 opposite side.Identified surface 56 is arranged to the plane shape with the intersect vertical axis of admission cam shaft 16.The identified surface 56 that is plane shape is provided with the identifying part 58 relative with chain guard 50 along diametric(al) outside circumferencial direction, and this identifying part 58 is consistent with the angle of swing of admission cam shaft 14.

The air inlet side channel notch portion 40 of above-mentioned location usefulness is towards the axial direction of admission cam shaft 16 and extend on the identified surface 58, this slot-open-section 40 is arranged in the air inlet side attachment hole 36 along diametric(al), and attachment hole 36 is arranged on the identified surface 56 on the inboard of identifying part 58.The identifying part 58 of present embodiment is arranged on the circumferencial direction of identified surface 56, and it is recessed and relative with the sensor 60 that constitutes tools for measurement that identifying part 58 is flute profile.

Identifying part 58 is discerned by sensor 60, measures the angle of swing of admission cam shaft 14 by sensor 60.As shown in Figure 6 and Figure 7, sensor 60 is arranged on chain guard 50 those sides of sensing rotor 54 opposite side.The chain guard 50 of sensing rotor 54 opposite side is provided with patchhole 62, and patchhole 62 is used for inserting sensor 60.As shown in Figure 2, sensor 60 is inserted in the patchhole 62, and flange 64 produces with chain guard 50 and contacts, thereby sensor 60 is connected on the cylinder cap 6 relative with identified surface 58 by a connecting bolt 66.

First embodiment:

Next, the explanation of first embodiment's working procedure will be provided.

As depicted in figs. 1 and 2, in driving running, internal-combustion engine 2 rotates admission cam shaft 16 and exhaust cam shaft 18 by timing chain 44, and they and bent axle 12 are rotated synchronously, and internal-combustion engine 2 drives and opens and closes suction valve and outlet valve, but not shown.

Shown in Fig. 6 and 7, rotational angle detecting apparatus 52 is provided with identifying part 58 at identified surface 56 places of sensing rotor 54, identifying part 58 is consistent with the angle of swing of admission cam shaft 14 and relative with chain guard 50, sensing rotor 54 is arranged to an integral body with the air inlet side attachment portion 32 of admission cam shaft 16, thereby discern identifying part 58 by sensor 60 and measure angle of swing, and sensor 60 is installed on chain guard 50 those sides.

As shown in Figure 8, sensor 60 produces voltage, and this voltage according to identified surface 56 apart from a1 and different and different apart from a2 to the bottom surface 68 of the identifying part 58 that is flute profile, thereby formed the voltage that produced according to threshold voltage with the form of rectangular wave by means of intrinsic sensor circuit (not shown).The rectangular wave of output is imported into the control gear (not shown) from sensor 60, and is utilized to determine cylinder, degree in crank angle or like that.

32 places, air inlet side attachment portion of the air inlet sprocket wheel 28 of first embodiment's rotational angle detecting apparatus 52 on the admission cam shaft 16 that is connected to internal-combustion engine 2 are provided with the sensing rotor 54 that is used for determining angle of swing, and sensing rotor 54 those sides of chain guard 50 opposite side are provided with consistent with the angle of swing of admission cam shaft 16, as to be flute profile identifying part 58, therefore, can not cause the length that physical dimension increases and admission cam shaft 16 is in axial direction the gone up increase of air inlet sprocket wheel 28.

In addition, in the through hole 62 that sensor 60 is inserted the chain wheel cover 50 relative with sensing rotor 54, first embodiment's rotational angle detecting apparatus 52 is arranged to a sensor 60 and is connected on the cylinder cap 6, thereby it is relative with identifying part 58, this sensor 60 is measured the angle of swing of admission cam shaft 16 by discerning identifying part 58, therefore, has prevented the vibration of chain guard 50, make the layout of sensor 60 become more convenient, sensor 60 is arranged near identifying part 58.

Sensing rotor 54 is arranged to an integral body with the air inlet side attachment portion 32 of air inlet sprocket wheel 28, this sensing rotor 54 is provided with identified surface 56 in that side relative with chain guard 50, and the circumferencial direction of identified surface 56 is provided with the identifying part 58 relative with sensor 60, therefore, machining air inlet sprocket wheel 28 simultaneously, sensing rotor 54 and identifying part 58, therefore can reduce many machinings and many work in combination, improved the setting accuracy of sensing rotor 54 with respect to admission cam shaft 16, eliminated the error in the anabolic process, can not cause that the physical dimension increase of air inlet sprocket wheel 28 and the axial length of admission cam shaft 16 increase, and sensor 60 is arranged near sensing rotor 54.

That is to say, first embodiment's rotational angle detecting apparatus 52 is provided with identifying part 58 by utilizing the identified surface 56 perpendicular to the axis of admission cam shaft 16, therefore, by being provided with on sensing rotor 54 that the identifying part 58 with less degree of depth measures is possible, and this sensing rotor 54 is arranged to an integral body with air inlet side attachment portion 32.As Figure 23 in traditional rotational angle detecting apparatus 108 shown in Figure 25, when measuring by means of sensor 118, and the sensor 118 that is provided with around the circumferential edges 114 of sensing rotor 112 is towards diametric center, caused a problem: very little opposite with respect to the variation of the position of bent axle 104 (bent axle 104 is running shafts) with sensor 118, the circumferential edges 114 of sensing rotor 112 and need bigger variation from the distance between the outstanding projection 116 of circumferential edges 114, therefore, the height of projection 116 is bigger.

On the contrary, rotational angle detecting apparatus 52 according to first embodiment, measure by identifying part 58 being set at identified surface 56 places perpendicular to the sensing rotor 54 of the axis of above-mentioned admission cam shaft 16, by these, with respect to for the caused change in location of vibration of machining and driving internal-combustion engine 2, can reduce the variable in distance between sensor 60 and the identifying part 58, the identifying part 58 that goes out to have the less degree of depth by machining on sensing rotor 54 is measured, and the physical dimension that can prevent to be provided with the air inlet side chain wheel 28 of sensing rotor 54 increases.

In addition, as depicted in figs. 1 and 2, first embodiment's rotational angle detecting apparatus 52 is in the identified surface 56 that is provided with along place, the inboard on the diametric(al) of the tooth 68 of air inlet sprocket wheel 28 perpendicular to the axial direction of admission cam shaft 16, air inlet sprocket wheel 28 is driven by timing chain 44, rotational angle detecting apparatus 52 identified surface 56 are provided with identifying part 58, be arranged to tooth 68 by identified surface 56 sensors 60, can prevent to cause error measurement by the tooth 68 of air inlet sprocket wheel 28 away from input sprocket 28.

In addition, first embodiment's rotational angle detecting apparatus 52 is furnished with sensor 60 on that side of chain guard 50, by the patchhole 62 of inserting chain guard 50 this sensor 60 is connected on the cylinder cap 6, therefore, the flange 64 of sensor 60 has prevented the vibration of chain guard, thereby can realize the vibration isolation.

Therefore, first embodiment's rotational angle detecting apparatus 52 can prevent that the physical dimension of air inlet sprocket wheel 58 from increasing, and this air inlet sprocket wheel 58 is provided with the sensing rotor 54 that is used for measuring angle of swing, first embodiment's rotational angle detecting apparatus 52 can reduce the restriction that sensor 60 is arranged, can reduce the vibration of chain guard 50, can improve the setting accuracy of sensing rotor 54 relative admission cam shafts 16, can reduce many steps of work in combination, can reduce weight, can the realization expense reduce, the error measurement of angle of swing can be prevented, and the reliability of angle of swing control can be improved.

Second embodiment:

Fig. 9 has represented the second embodiment of the present invention to Figure 13.In addition, by identical label is used can realize with above-mentioned Fig. 1 on the identical part of the function of these parts of first embodiment shown in Figure 8, provide second embodiment's explanation.

In Fig. 9 and Figure 10, internal-combustion engine 2 is furnished with cylinder body 4, cylinder cap 6, top cover 8 and lower case 10, they are cluster engine members, on cylinder body 4, bent axle 12 is running shafts and being supported by lower case 10 in the axial direction, and crank and chain-wheel 14 is to rotatablely move to transmit part and be connected on the end on the axial direction of bent axle 12.

End on the axial direction of internal-combustion engine 2 admission cam shafts 16 and exhaust cam 18 is provided with air inlet side connecting wheel hub portion 20 and exhaust side connecting wheel hub portion 22, and admission cam shaft 16 and exhaust cam 18 are running shafts and are supported by cylinder cap 6 in the axial direction, and air inlet side connecting wheel hub portion 20 and exhaust side connecting wheel hub portion 22 are provided with air inlet side through hole 24 and the exhaust side through hole 26 that is used to locate.

The air inlet side connecting wheel hub portion 20 and the exhaust side connecting wheel hub portion 22 of admission cam shaft 16 and exhaust cam shaft 18 link together with air inlet sprocket wheel 28 and exhaust sprocket 30 separately, and air inlet sprocket wheel 28 and exhaust sprocket 30 are the transmission parts that rotatablely move.Air inlet sprocket wheel 28 and exhaust sprocket 30 are provided with air inlet side attachment portion 32 and exhaust side attachment portion 34 separately, and also be provided with air inlet side attachment hole 36 and exhaust side attachment hole 38 separately, and air inlet side connecting wheel hub portion 20 and exhaust side connecting wheel hub portion 22 are fixed and are press fitted on air inlet side attachment hole 36 and the exhaust side attachment hole 38.Be flute profile, the air inlet side channel notch portion 40 of locating usefulness and exhaust side slot-open-section 42 axial direction, and be arranged in air inlet side attachment hole 36 and the exhaust side attachment hole 38 towards admission cam shaft 16 and exhaust cam shaft 18.

Be surrounded with timing chain 44 on crank and chain-wheel 14, air inlet sprocket wheel 28 and the exhaust sprocket 30, and timing chain 44 is the transmission parts that rotatablely move of annular.Timing chain 44 provides a predetermined tension force to install by chain stretching device 46 and chain retainer 48, this timing chain 44 is delivered to admission cam shaft 16 and exhaust cam shaft 18 to the rotating force of bent axle 12, thereby admission cam shaft 16 and exhaust cam shaft 18 are rotated synchronously with bent axle 12.

As shown in Figure 9, constitute the chain guard 50 that covers part and cover crank and chain-wheel 14, air inlet sprocket wheel 28 and exhaust sprocket 30 and timing chain 44.Chain guard 50 is connected on the cylinder cap 4 and cylinder body 6 that is positioned on bent axle 12 1 ends in the axial direction.

Internal-combustion engine 2 is provided with rotational angle detecting apparatus 52, and this testing apparatus 52 is used for measuring the angle of swing of bent axle 12 or is used for measuring the angle of swing of admission cam shaft 16 or exhaust cam shaft 18, and admission cam shaft 16 and exhaust cam shaft 18 are running shafts.Second embodiment's rotational angle detecting apparatus 52 is measured the angle of swing of admission cam shaft 18.

Shown in Figure 11 to 13, at 32 places, air inlet side attachment portion that are connected to the air inlet sprocket wheel 28 on the admission cam shaft 14, rotational angle detecting apparatus 52 is mounted to an integral body with sensing rotor 54, and this sensing rotor 54 is the identification parts that are used for discerning angle of swing.The sensing rotor 54 of being arranged to an integral body with air inlet side attachment portion 32 is provided with air inlet side attachment hole 36.As shown in Figure 9, sensing rotor 54 is installed on the offside of chain guard 50.

Identified surface 56 is arranged on sensing rotor 54 those sides of chain guard 50 opposite side.Identified surface 56 is mounted to the plane shape with the intersect vertical axis of admission cam shaft 16.The identified surface 56 that is plane shape is provided with and the corresponding to identifying part 58 of the angle of swing of admission cam shaft 14 along diametric(al) outside circumferencial direction, and this identifying part 58 is relative with chain guard 50.

The air inlet side channel notch portion 40 of location usefulness is towards the axial direction of admission cam shaft 16 and extend on the identified surface 58, this slot-open-section 40 is arranged in the air inlet side attachment hole 36 along diametric(al), and attachment hole 36 is arranged on the identified surface 56 on the inboard of identifying part 58.Identifying part 58 is arranged to be flute profile separately on the circumferencial direction of identified surface 56 recessed, and relative with the sensor 60 that is tools for measurement.As shown in figure 11, air inlet side channel notch portion 40 is arranged to be arranged on the diameter line L, and this diameter line L is identical with the diameter line of the identifying part 58 of identified surface 56.

Identifying part 58 is discerned by sensor 60, measures the angle of swing of admission cam shaft 14 by sensor 60.As shown in figure 12, sensor 60 is arranged on chain guard 50 those sides of sensing rotor 54 opposite side.The chain guard 50 relative with sensing rotor 54 is provided with patchhole 62, and patchhole 62 is used for inserting sensor 60.As shown in Figure 9, sensor 60 is inserted in the patchhole 62, and flange 64 produces with chain guard 50 and contacts, thereby flange 64 is connected on the cylinder cap 6 relative with identifying part 58 by connecting bolt 66.

Next, the explanation of second embodiment's working procedure will be provided.

As Fig. 9 and shown in Figure 10, in driving running, internal-combustion engine 2 rotates admission cam shaft 16 and exhaust cam shaft 18 by timing chain 44, and they and bent axle 12 are rotated synchronously, and internal-combustion engine 2 drives and opens and closes suction valve and outlet valve, but not shown.

Shown in Figure 11 to 13, rotational angle detecting apparatus 52 is provided with recessed identifying part 58 at identified surface 56 places of sensing rotor 54, identifying part 58 is consistent with the angle of swing of admission cam shaft 14 and relative with chain guard 50, and sensing rotor 54 is arranged to an integral body with the air inlet side attachment portion 32 of admission cam shaft 16, thereby discern identifying part 58 by sensor 60 and measure angle of swing, and sensor 60 is installed on chain guard 50 those sides.

As shown in figure 12, sensor 60 produces voltage, and this voltage according to identified surface 56 apart from a1 and different and different apart from a2 to the bottom surface 68 of the identifying part 58 that is flute profile, thereby formed the voltage that produced according to threshold voltage with the form of rectangular wave by means of intrinsic sensor circuit (not shown) as shown in figure 14.The rectangular wave of output is imported into unshowned control gear from sensor 60, and is utilized to determine cylinder, degree in crank angle or like that.

Second embodiment's rotational angle detecting apparatus 52 is provided with identifying part 58 at identified surface 56 places of sensing rotor 54, this identifying part 58 is consistent with the angle of swing of admission cam shaft 14 and relative with chain guard 50, and sensing rotor 54 is arranged to an integral body with the air inlet side attachment portion 32 of admission cam shaft 16, rotational angle detecting apparatus 52 chain guards 50 those sides are provided with sensor 60, and sensor 60 is measured angle of swing by identification identifying part 58.

Therefore, second embodiment's rotational angle detecting apparatus 52 can be realized the effect identical with first embodiment.

Second embodiment's rotational angle detecting apparatus 52 is provided with identifying part 58 at identified surface 56 places of sensing rotor 54, this identifying part 58 is consistent with the angle of swing of admission cam shaft 14 and relative with chain guard 50, and sensing rotor 54 is arranged to an integral body with the air inlet side attachment portion 32 of air inlet sprocket wheel 28, therefore, when air inlet sprocket wheel 28 is connected on the admission cam shaft 16, it can be at an easy rate couples together and can not disturb with being connected the frame (not shown), thereby has reduced weight.

That is to say, when air inlet sprocket wheel 28 and exhaust sprocket 30 are connected on admission cam shaft 16 and the exhaust cam shaft 18, at first, fix admission cam shaft 16 and exhaust cam shaft 18 on the cylinder cap 6 by means of the location air inlet side through hole 24 of usefulness and exhaust side through hole 26 and by they are arranged to, then, air inlet side channel notch portion 40 and exhaust side slot-open-section 42 by location usefulness are installed to air inlet sprocket wheel 28 and exhaust sprocket 30 on admission cam shaft 16 and the exhaust cam shaft 18, and by air inlet side attachment hole 36 and exhaust side attachment hole 38 air inlet sprocket wheel 28 and exhaust sprocket 30 are press fitted on air inlet side connecting wheel hub portion 20 and the exhaust side connecting wheel hub portion 22.

The operation of interference fit is carried out by robot device, in this case, this device is sought the air inlet side through hole 24 of location usefulness and the air inlet side channel notch portion 40 and the exhaust side slot-open-section 42 of exhaust side through hole 26 and location usefulness by rotating air inlet sprocket wheel 28 and exhaust sprocket 30 and admission cam shaft 16 and exhaust cam shaft 18.At this time, when identifying part 58 when the identified surface 56 of sensing rotor 54 is stretched out, connect frame and can disturb identifying part 58, therefore

sprocket wheel

28 and 30 does not separately rotate.

Rotational angle detecting apparatus 52 according to second embodiment, identifying part 58 is arranged to from the identified surface 56 of sensing rotor 54 recessed, therefore, when air inlet sprocket wheel 28 is connected on the admission cam shaft 16, connect frame and can not disturb identifying part 58, therefore can connect air inlet sprocket wheel 28 at an easy rate, and reduce weight.

In addition, the air inlet sprocket wheel 28 that is provided with sensing rotor 54 is provided with the air inlet side channel notch portion 40 of location usefulness, and this slot-open-section extends on the identified surface 56, and air inlet sprocket wheel 28 also is provided with and the corresponding to identifying part 58 of angle of swing.Therefore, there is a kind of situation as shown in figure 15: thus sensor 60 is taken the air inlet side channel notch portion 40 of location usefulness as to be identifying part 58 is measured it to it as the signal of angle of swing mistakenly.In this case, there is a defective: the reliability that has reduced angle of swing control.

As shown in figure 11, the diametric(al) outside circumferencial direction of the identified surface 56 of second embodiment's rotational angle detecting apparatus 52 on sensing rotor 54 those sides of chain guard 50 offsides is provided with identifying part 58, rotational angle detecting apparatus 52 is provided with air inlet side channel notch portion 40 along diametric(al) diameter line L, and slot-open-section 40 is arranged in the air inlet side attachment hole 36, and air inlet side attachment hole 36 is arranged on the identified surface 56 on the inboard of identifying part 58, and this diameter line L is identical with the diameter line of the identifying part 58 of identified surface 56.

Therefore, according to second embodiment's rotational angle detecting apparatus 52, sensor 60 is taken air inlet side channel notch portion 40 as to be the signal of identifying part 58 is consistent with the normal identification signal of identifying part 58 mistakenly, therefore, can not measure rotation signal mistakenly.

Therefore, second embodiment's rotational angle detecting apparatus 52 can prevent to measure mistakenly angle of swing, and can improve the reliability of angle of swing control.

The 3rd embodiment:

Figure 16 has represented the third embodiment of the present invention.In addition, by identical label is used can realize with above-mentioned Fig. 1 on the part of the identical function of these parts of first embodiment shown in Figure 8, provide the 3rd embodiment's explanation.

The 3rd embodiment's rotational angle detecting apparatus 52 is provided with air inlet side attachment hole 36 at the air inlet side attachment portion 32 and sensing rotor 54 places of admission cam shaft 16, and sensing rotor 54 is arranged to an integral body with air inlet side attachment portion 32, that side of the sensing rotor 54 of rotational angle detecting apparatus 52 chain guards 50 opposite side is provided with identified surface 56, outer circumference direction along diametric(al) identified surface 56 is provided with angle of swing corresponding to, recessed identifying part 58, this identifying part 58 is relative with sensor 60, along being provided with air inlet side channel notch portion 40 in the air inlet side attachment hole 36 of diametric(al) on the inboard that is arranged in identifying part 58, this air inlet side channel notch portion 40 is towards the axial direction of admission cam shaft 16 and extend on the identified surface 56, rotational angle detecting apparatus 52 is provided with the air inlet side channel notch portion 40 that is arranged on the diameter line L, and the diameter line of an identifying part 58 on this diameter line L and the identified surface 56 is identical, setting so that air inlet side channel notch portion 40 are furnished with a width w therewith, and this width w is identical with the width of identifying part 58 for the circumferencial direction of identified surface 56.

The 3rd embodiment's rotational angle detecting apparatus 52 is provided with air inlet side channel notch portion 40, therefore it can be arranged on the diameter line L, and this diameter line L is identical with the diameter line of one of them identifying part 58, the width of air inlet side channel notch portion 40 is width w, this width is identical with the width of identifying part 58, therefore, can make and mistakenly air inlet side channel notch portion 40 is taken as the deration of signal of identifying part 58 is identical with the width of the normal identification signal of identifying part 58.

Therefore, the 3rd embodiment's rotational angle detecting apparatus 52 can be realized the effect identical with first embodiment, and can prevent more for certain that sensor 60 from measuring angle of swing mistakenly.

The 4th embodiment:

Figure 17 has represented the fourth embodiment of the present invention.In addition, by identical label is used can realize with above-mentioned Fig. 1 on the part of the identical function of these parts of first embodiment shown in Figure 8, provide the 4th embodiment's explanation.

The 4th embodiment's rotational angle detecting apparatus 52 is provided with air inlet side attachment hole 36 at the air inlet side attachment portion 32 and sensing rotor 54 places of admission cam shaft 16, and sensing rotor 54 is arranged to an integral body with air inlet side attachment portion 32, sensing rotor 54 those sides of rotational angle detecting apparatus 52 chain guards 50 opposite side are provided with identified surface 56, inside circumference direction along the diametric(al) identified surface 56 of air inlet side attachment hole 36 is provided with and the corresponding to recessed identifying part 58 of angle of swing, this identifying part 58 is relative with sensor 60, in air inlet side attachment hole 36, be provided with air inlet side channel notch portion 40, this air inlet side channel notch portion 40 is towards the axial direction of admission cam shaft 16 and extend on the identified surface 56, thereby rotational angle detecting apparatus 52 is provided with the identifying part 58 that the air inlet side channel notch portion 40 of admission cam shaft 16 is covered folded one of them identified surface 56.

Like this, the 4th embodiment's rotational angle detecting apparatus 52 is provided with air inlet side channel notch portion 40, and this air inlet side channel notch portion 40 coincides with one of them identifying part 58, and identifying part 58 is provided with along air inlet side attachment hole 36, therefore, air inlet side channel notch portion 40 can be used as one of them identifying part 58, therefore reduce many machinings by reducing many identifying parts 58, make the identification of 60 pairs of air inlet side channels of sensor notch portion 40 become the identification that aligns one of them normal identifying part 58, therefore can not measure angle of swing mistakenly.

Therefore, the 4th embodiment's rotational angle detecting apparatus 52 can be realized the identical effect with above-mentioned first embodiment, and can prevent more for certain that sensor 60 from measuring angle of swing mistakenly.

The 5th embodiment:

Figure 18 has represented the fifth embodiment of the present invention.In addition, by identical label is used can realize with above-mentioned Fig. 1 on the part of the identical function of these parts of first embodiment shown in Figure 8, provide the 5th embodiment's explanation.

The 5th embodiment's rotational angle detecting apparatus 52 is provided with air inlet side attachment hole 36 at the air inlet side attachment portion 32 and sensing rotor 54 places of admission cam shaft 16, and sensing rotor 54 is arranged to an integral body with air inlet side attachment portion 32, that side of the sensing rotor 54 of rotational angle detecting apparatus 52 chain guards 50 opposite side is provided with identified surface 56, outer circumference direction along diametric(al) identified surface 56 is provided with and the corresponding to recessed identifying part 58 of angle of swing, this identifying part 58 is relative with sensor 60, in air inlet side attachment hole 36, be provided with air inlet side channel notch portion 40 along diametric(al), this air inlet side channel notch portion 40 is towards the axial direction of admission cam shaft 16 and extend on the identified surface 56, this air inlet side attachment hole 36 is arranged on the inboard of identifying part 58, the circumferencial direction of rotational angle detecting apparatus 52 identified surface 56 is provided with the step portion 70 that is ring, this step portion 70 extends to the outermost end 40e of air inlet side channel notch portion 40 from air inlet side attachment hole 36 along diametric(al), and a recessed degree of depth, this degree of depth is equal to or greater than the degree of depth of identifying part 58.

Like this, the circumferencial direction of the 5th embodiment's rotational angle detecting apparatus 52 identified surface 56 is provided with the step portion 70 that is ring, this step portion 70 extends to the outermost end 40e of air inlet side channel notch portion 40 from air inlet side attachment hole 36 along diametric(al), an and recessed degree of depth, this degree of depth is equal to or greater than the degree of depth of identifying part 58, therefore, can determine that under the same conditions a part is provided with the identified surface 56 of identifying part 58 and the identified surface 56 that a part is not provided with identifying part 58, therefore can prevent the wrong identification of sensor 60.

Therefore, the 5th embodiment's rotational angle detecting apparatus 52 can be realized the identical effect with above-mentioned first embodiment, and can prevent more for certain that sensor 60 from measuring angle of swing mistakenly.In addition, by realize measuring on first embodiment's identified surface 56, the 5th embodiment's rotational angle detecting apparatus 52 can prevent more for certain that sensor 60 from measuring angle of swing mistakenly.In addition, the degree of depth h1 of step portion 70 is arranged to equate (h1=h2) with the degree of depth h2 of identifying part 58, perhaps is arranged to the big (h1＞h2) than the degree of depth h2 of identifying part 58.

The 6th embodiment:

Figure 19 has represented sixth embodiment of the present invention SG1.In addition, by identical label is used can realize with above-mentioned Fig. 1 on the part of the identical function of these parts of first embodiment shown in Figure 8, provide the 6th embodiment's explanation.

According to each above-mentioned embodiment, be plane shape, be arranged on sensing rotor 54 those sides with the identified surface 56 of the intersect vertical axis of admission cam shaft 16, this sensing rotor 54 is arranged to an integral body with the air inlet side attachment portion 32 of the air inlet sprocket wheel 28 of chain guard 50 opposite side.

Rotational angle detecting apparatus 52 according to the 6th embodiment, the identified surface 56 of tapered shape is arranged on sensing rotor 54 those sides, the identified surface 56 of tapered shape and the axis oblique of admission cam shaft 16, and sensing rotor 54 is arranged to an integral body with the air inlet side attachment portion 32 of the air inlet sprocket wheel 28 of chain guard 50 opposite side.Sensing rotor 54 correspondingly is provided with the identifying part 58 relative with sensor 60 on the circumferencial direction of the identified surface 56 of tapered shape.

Like this, rotational angle detecting apparatus 52 according to the 6th embodiment, the identified surface 56 of tapered shape is arranged on sensing rotor 54 those sides of chain guard 50 opposite side, the identified surface 56 of this tapered shape and the axis oblique of admission cam shaft 16, identifying part 58 is arranged on the circumferencial direction of identified surface 56, by these, thereby sensor 60 can be arranged to such an extent that arrange compactlyer near sensing rotor 54.

Therefore, the 6th embodiment's rotational angle detecting apparatus 52 can be realized the identical effect with above-mentioned first embodiment, and helps to reduce the physical dimension of internal-combustion engine 2.

The 7th embodiment:

Figure 20 has represented seventh embodiment of the present invention SG2.Rotational angle detecting apparatus 52 sensing rotors 54 those sides of the 7th embodiment be provided be plane shape, with the identified surface 56 of the intersect vertical axis of admission cam shaft 16, and sensing rotor 54 is arranged to an integral body and relative with chain guard 50 with the air inlet side attachment portion 32 of air inlet sprocket wheel 28, the identified surface 56 that is plane shape is provided with the identifying part 58 in the cross section with dam body shape triangular in shape, and this identifying part 58 is given prominence on the circumferencial direction in the outside along diametric(al).

Identifying part 58 is provided with the protuberate 72 that favours identified surface 56, this protuberate 72 along the sense of rotation of sensing rotor 54 towards the direction that turns forward, thereby sensor 60 is mounted obliquely within on chain guard 50 those sides relative with protuberate 72, and this sensor 60 along the sense of rotation of sensing rotor 54 towards sweptback direction.

The 7th embodiment's rotational angle detecting apparatus 52 identifying parts 58 are provided with the protuberate 72 of inclination, and this identifying part 58 is outstanding from the identified surface that is plane shape 56 of sensing rotor 54, rotational angle detecting apparatus 52 is provided with the sensor 60 relative with protuberate 72 obliquely, by these, sensor 60 is arranged to such an extent that also can be arranged on along on the inboard on the diametric(al) of sensing rotor 54 near sensing rotor 54, therefore arrange compactlyer, advance a size of having dwindled internal-combustion engine 2 for a short time.

In addition, rotational angle detecting apparatus 52 according to the 7th embodiment, removable identifying part 58 intersects with sensor 60, by this, the height of the protuberate 72 of identified surface 56 is not constant in each above-mentioned embodiment, but can change higher or lowerly according to the rotation of sensing rotor 54, therefore, bigger from the voltage change of sensor 60 outputs, therefore can determine angle of swing more exactly.

The 8th embodiment:

Figure 21 shows eighth embodiment of the present invention SG3.Sensing rotor 54 those sides of the 8th embodiment's rotational angle detecting apparatus 52 chain guards 50 opposite side be provided be plane shape, with the identified surface 56 of the intersect vertical axis of admission cam shaft 16, and sensing rotor 54 is arranged to an integral body with the air inlet side attachment portion 32 of air inlet sprocket wheel 28, and the identified surface 56 that is plane shape is provided with the cross section with groove shape triangular in shape, recessed identifying part 58 along diametric(al) outside circumferencial direction.

Identifying part 58 is provided with and recessed surperficial 74 of identified surface 56 inclinations, should recessed surface 74 along the sense of rotation of sensing rotor 54 towards the direction that turns forward, thereby sensor 60 is mounted obliquely within on chain guard 50 those sides relative with recessed surface 74, and along the sense of rotation of sensing rotor 54 towards sweptback direction.

The 8th embodiment's rotational angle detecting apparatus 52 identifying parts 58 are provided with the protuberate 72 of inclination, and this identifying part 58 is outstanding from the identified surface that is plane shape 56 of sensing rotor 54, rotational angle detecting apparatus 52 is provided with the sensor 60 relative with protuberate 72 obliquely, therefore, sensor 60 is arranged to such an extent that also can be arranged on the inboard of sensing rotor 54 along diametric(al) near sensing rotor 54, therefore arrange compactlyer, advance a size of having dwindled internal-combustion engine 2 for a short time.

In addition, rotational angle detecting apparatus 52 according to the 8th embodiment, removable identifying part 58 intersects with sensor 60, by this, recessed surperficial 74 height of identified surface 56 is not constant as each above-mentioned embodiment, but can change higher or lowerly according to the rotation of sensing rotor 54, therefore, bigger from the voltage change of sensor 60 outputs, therefore can determine angle of swing more exactly.

The 9th embodiment:

Figure 22 shows ninth embodiment of the present invention SG4.That side of the sensing rotor 54 of the 9th embodiment's rotational angle detecting apparatus 52 chain guards 50 opposite side be provided be plane shape, with the identified surface 56 of the intersect vertical axis of admission cam shaft 16, and sensing rotor 54 is arranged to an integral body with the air inlet side attachment portion 32 of air inlet sprocket wheel 28, rotational angle detecting apparatus 52 is provided with identifying part 58 along the outer circumference direction that diametric(al) is the identified surface 56 of plane shape, and this identifying part 58 is outstanding and recessed with the cross section of groove shape triangular in shape with the cross section of dam body shape triangular in shape.

Identifying part 58 is provided with the plane 76 with identified surface 56 obliques, this plane 76 along the sense of rotation of sensing rotor 54 towards the direction that turns forward, also be provided with sensor 60, thereby it is relative with plane 76 that this sensor 60 tilts to be installed on chain guard 50 those sides, and along the sense of rotation of sensing rotor 54 towards sweptback direction.

The 9th embodiment's rotational angle detecting apparatus 52 identifying parts 58 are provided with clinoplain 76, this identifying part 58 is outstanding and recessed from the identified surface that is plane shape 56 of sensing rotor 54, rotational angle detecting apparatus 52 is provided with sensor 60 inclination, relative with plane 74, therefore, sensor 60 is arranged near sensing rotor 54, and be arranged on the inboard of sensing rotor 54, therefore arrange compactlyer, dwindled the size of internal-combustion engine 2.

In addition, rotational angle detecting apparatus 52 according to the 9th embodiment, removable identifying part 58 intersects with sensor 60, by this, the height on the plane 76 of identified surface 56 is not constant as each above-mentioned embodiment, and the area on plane 76 is bigger than protuberate 72 and recessed surface 74 these areas of above-mentioned the 7th embodiment and the 8th embodiment, by these, the height on the plane 76 of identified surface 56 can come according to the rotation of sensing rotor 54 to change higher or lowerly more significantly, therefore, bigger from the voltage change of sensor 60 outputs, therefore can determine angle of swing more exactly.

In addition, although in above-mentioned each embodiment, sensing rotor 54 is arranged to an integral body with air inlet sprocket wheel 28, but be applicable to that also a sensing rotor 54 and crank and chain-wheel 14 or exhaust sprocket 30 be arranged to an integral body, be applicable to that also a sensing rotor 54 and Timing Belt wheel (not shown) be arranged to an integral body rather than an integral body is arranged in it and these sprocket wheels.In addition, although identifying part 58 is arranged to the identified surface 56 recessed one-tenth flute profiles from sensing rotor 54, it also can be arranged to be the dam body shape and give prominence to.

Like this, rotational angle detecting apparatus according to internal-combustion engine of the present invention, the physical dimension that can not causing rotatablely moves transmits part increases or can not cause that running shaft increases along the length on the axial direction, the layout of tools for measurement is favourable, tools for measurement arrange the most approaching identification part, in addition, can prevent to cover part vibration, the physical dimension that can not causing rotatablely moves transmits part increase and running shaft along the increase of the length on the axial direction, tools for measurement arrange the most approaching identification part.

In addition, according to rotational angle detecting apparatus of the present invention, when the transmission part that rotatablely moves is connected on the running shaft, connect frame and can not disturb identifying part, and its easy connection, can reduce weight, the timing of tools for measurement wrong identification slot-open-section is identical with the timing of normal identification identifying part, therefore can not measure angle of swing mistakenly.

In addition, the rotational angle detecting apparatus according to the present invention, slot-open-section can be used as one of them identifying part, therefore assign to reduce weight by reducing the identification part, make tools for measurement become and align the not identification of part of general knowledge the identification of slot-open-section, therefore can not measure angle of swing mistakenly, under identical situation, can determine to be provided with identified surface identifying part a part and the part of the identifying part of identified surface is not set, therefore can prevent wrong identification.

In addition, according to rotational angle detecting apparatus of the present invention, the layout of tools for measurement is favourable, tools for measurement arrange the most approaching identification part, can shorten the length of tools for measurement outstanding from the cover part, so rotational angle detecting apparatus can be arranged compactly more.

Therefore, according to rotational angle detecting apparatus of the present invention, the physical dimension of transmitting part of can avoiding rotatablely moving increases, and the transmission part that rotatablely moves is provided with the identification part that is used for measuring angle of swing, reduced the qualification that tools for measurement is arranged, reduced the vibration of cover part, improved the setting accuracy of identification part with respect to running shaft, the many steps in the work in combination have been reduced, reduced weight, the realization expense reduces, and has prevented the error measurement to angle of swing, improved the reliability of angle of swing control, rotational angle detecting apparatus also can be realized the function of existing rotational angle detecting apparatus.

Claims

1. the rotational angle detecting apparatus of an internal-combustion engine is characterized in that: be surrounded with rotatablely moving of ring rotation transmission of movement part (44) and transmit part (28,30; 14) be arranged to be connected to running shaft (12; 16,18; 104) on the axial direction one distolateral on, and running shaft is vertically by the cluster engine member (4,6 of internal-combustion engine, 8,10) support, be provided with cover part (50), this cover spare (50) covers ring rotation transmission of movement part (44) and rotatablely moves and transmits part (28,30; 14), this transmission part that rotatablely moves is connected to cluster engine member (4,6,8,10) on, be used for discerning the identification part (54) and the attachment portion (32 that is connected to the rotatablely moving transmission part on the running shaft of angle of swing, 34) be arranged to an integral body, be arranged on the side of the identification part (54) that covers part (50) opposite side with the corresponding to identifying part of the angle of swing of running shaft (58), be provided with the tools for measurement (60) of measuring the angle of swing of running shaft by identification identifying part (58), in the cover spare through hole (62) that tools for measurement (60) is inserted into identification part (54) opposite side, tools for measurement (60) thus be arranged to be connected on the cluster engine member relative with identifying part (58).

2. the rotational angle detecting apparatus of internal-combustion engine as claimed in claim 1, it is characterized in that: a side of rotational angle detecting apparatus identification part (54) is provided with the identified surface (56) relative with covering part (50), and the attachment portion (32 of this identification part (54) and the transmission part that rotatablely moves, 34) be arranged to an integral body, the identifying part (58) relative with tools for measurement (60) is set on the circumferencial direction of identified surface (56).

3. the rotational angle detecting apparatus of internal-combustion engine as claimed in claim 1, it is characterized in that: a side of rotational angle detecting apparatus identification part (54) is provided with the identified surface (56) relative with covering part (50), and the attachment portion (32 of this identification part (54) and the transmission part that rotatablely moves, 34) be arranged to an integral body, on the circumferencial direction of identified surface (56), be provided with and relative, the recessed identifying part of tools for measurement (60) (58).

4. the rotational angle detecting apparatus of internal-combustion engine as claimed in claim 3, it is characterized in that: rotational angle detecting apparatus is provided with the attachment portion (32 that being positioned at the transmission part that rotatablely moves, 34) attachment hole (36 on, 38) and identification part (54), an integral body is arranged in this identification part and attachment portion, that side of identification part of rotational angle detecting apparatus cover part (50) opposite side is provided with identified surface (56), the circumferencial direction of identified surface (56) is provided with relative with tools for measurement, recessed identifying part (58), at attachment hole (36,38) be provided with the slot-open-section (40 of location usefulness in along diametric(al), 42), this slot-open-section (40,42) towards the axial direction of running shaft and extend on the identified surface (56), and attachment hole (36,38) is arranged on the place, inboard of identifying part (58), and rotational angle detecting apparatus is provided with the slot-open-section (40 that is arranged on the diameter line, 42), and the diameter line of the identifying part on diameter line and one of them identified surface is identical.

5. the rotational angle detecting apparatus of internal-combustion engine as claimed in claim 3, it is characterized in that: rotational angle detecting apparatus is provided with the attachment portion (32 that being positioned at the transmission part that rotatablely moves, 34) attachment hole (36 on, 38) and identification part (54), an integral body is arranged in this identification part and attachment portion, one side of the identification part of rotational angle detecting apparatus cover part (50) opposite side is provided with identified surface (56), the circumferencial direction of identified surface is provided with the recessed identifying part (58) relative with tools for measurement, at attachment hole (36,38) be provided with the slot-open-section (40 of location usefulness in along diametric(al), 42), this slot-open-section (40,42) towards the axial direction of running shaft and extend on the identified surface (56), and attachment hole (36,38) inboard that is arranged on identifying part (58) is located, slot-open-section is arranged to be arranged on the diameter line, and the diameter line of the identifying part on this diameter line and one of them identified surface is identical because this setting so that for the circumferencial direction of identified surface the width of slot-open-section become identical with the width of identifying part.

6. the rotational angle detecting apparatus of internal-combustion engine as claimed in claim 3, it is characterized in that: rotational angle detecting apparatus is provided with the attachment portion (32 that being positioned at the transmission part that rotatablely moves, 34) attachment hole (36 on, 38) and identification part (54), an integral body is arranged in this identification part and attachment portion, one side of the identification part of rotational angle detecting apparatus cover part (50) opposite side is provided with identified surface (56), it is relative with tools for measurement (60) that the circumferencial direction of identified surface is provided with, along attachment hole (36,38) recessed identifying part (58), in attachment hole (36,38) be provided with the slot-open-section (40 of locating usefulness, 42), this slot-open-section is towards the axial direction of running shaft and extend on the identified surface (56), and slot-open-section is arranged the identifying part that covers on folded one of them identified surface.

7. the rotational angle detecting apparatus of internal-combustion engine as claimed in claim 3, it is characterized in that: rotational angle detecting apparatus is provided with the attachment portion (32 that being positioned at the transmission part that rotatablely moves, 34) attachment hole (36 on, 38) and identification part (54), an integral body is arranged in this identification part and attachment portion, one side of the identification part of rotational angle detecting apparatus cover part (50) opposite side is provided with identified surface (56), the circumferencial direction of identified surface is provided with the recessed identifying part (58) relative with tools for measurement (60), at attachment hole (36,38) be provided with the slot-open-section (40 of location usefulness in along diametric(al), 42), this slot-open-section is towards the axial direction of running shaft and extend on the identified surface (56), and attachment hole (36,38) inboard that is arranged on identifying part (58) is located, the circumferencial direction of rotational angle detecting apparatus identified surface (56) is provided with the step portion (70) that is toroidal, this step portion (70) extends to the outermost end and a recessed degree of depth of slot-open-section from attachment hole along diametric(al), this degree of depth is equal to or greater than the degree of depth of identifying part.

8. as the rotational angle detecting apparatus of any described internal-combustion engine of claim 3 to 7, it is characterized in that: a side of rotational angle detecting apparatus identification part (54) is provided with the identified surface (56) that is plane shape, the intersect vertical axis of this identified surface and running shaft, and this identification part (54) transmits the attachment portion (32 of part with rotatablely moving of cover part (50) opposite side, 34) be arranged to an integral body, the circumferencial direction that is the identified surface (56) of plane shape is provided with the recessed identifying part (58) relative with tools for measurement (60).

9. as the rotational angle detecting apparatus of any described internal-combustion engine of claim 3 to 7, it is characterized in that: a side of rotational angle detecting apparatus identification part (54) is provided with the identified surface (56) of tapered shape, the axis oblique of this identified surface and running shaft, and this identification part (54) transmits the attachment portion (32 of part with rotatablely moving of cover part (60) opposite side, 34) be arranged to an integral body, the circumferencial direction of the identified surface of tapered shape (56) is provided with the recessed identifying part (58) relative with tools for measurement (60).