JPH064454U - Rotational phase difference adjusting device between rotating members - Google Patents

Abstract

(57) [Abstract] [Purpose] A device capable of accurately adjusting a rotational phase difference between rotating members, for example, an advance angle between an engine output shaft and a camshaft shaft can be instantaneously adjusted during rotation. Providing a device. [Structure] Drive rotating member 11 and driven rotating members 12, 13
Are concentrically arranged, and the two rotary members 11, 12 are relatively rotated in the circumferential direction by relatively sliding in the axial direction between the drive rotary member 11 and the driven rotary member 12 (13). , 12 (13) are provided with helical guide mechanisms 14, 18 (15, 17) for adjusting the rotational phase difference.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a rotational phase difference adjusting device for rotating members, which finely adjusts a rotational phase difference between a plurality of rotating members during rotation. Incidentally, in this invention, the rotational phase difference is an advance angle, that is, a rotational angle difference between a plurality of rotating members (a plurality of rotating shafts). The angle at which the rotation phase advances.

[0002]

[Prior art]

 Automakers around the world are looking for a car that is satisfying in every respect because of the design of a car that runs smoothly at low speeds and powerfully at high speeds. Although diesel engines perform well at low speeds, they are relatively poor at high speeds, while gasoline engines perform well at high speeds, but relatively poor at low speeds.

[0003]

[Problems to be solved by the device]

 Until now, there was no engine with good performance in all regions of low speed, medium speed, and high speed, but this is mainly due to the inadequate adjustment of valve opening timing and ignition timing with respect to engine rotation speed. Was. All automakers know that an engine that exhibits good performance at high speeds requires a significant advance in ignition timing, so advancement of ignition timing and early opening of the air valve are necessary. The early opening of the air valve at high speed is convenient for discharging a sufficient amount of air and effective combustion gas, and the output increases at high speed as the ignition timing advances. In order to bring out the engine performance at low speeds, the ignition timing is slightly delayed and the air valve opening timing cannot be advanced, so the explosion stroke is extended and the piston thrust increases, increasing the low speed torque.

Actually, the opening timing and the ignition timing of the intake valve and the exhaust valve are accurately adjusted so that good performance is exhibited in all regions of low speed, medium speed and high speed. Although there are eccentric and vacuum advances related to ignition, they have not been used until today. In some multi-valve engines, the increase in the number of air valves is simply for the purpose of increasing intake and exhaust volumes, not for the timing of opening the air valves, but for the partial requirements. Only.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a device for adjusting the advance angle between two rotating members, and at least the drive rotating member. Is also to adjust the advance angle between each one of the driven rotary members. Further, the purpose of this consideration is to provide a rotary member that can be mounted between the camshaft of the air valve and the drive shaft of the ignition distributor so that good performance is achieved in all of the low speed, medium speed, and high speed regions. To provide a rotational phase difference adjusting device.

[0006]

[Means for Solving the Problems]

 The rotation phase difference adjusting device between rotating members according to claim 1, wherein the driving rotating member and at least one driven rotating member that is arranged concentrically or in parallel with the driving rotating member and that rotates in synchronization. The rotational phase difference between the two rotating members is adjusted by relatively sliding both rotating members in the axial direction between the drive rotating member and the driven rotating member to rotate the two rotating members relative to each other in the circumferential direction. A spiral guide mechanism is installed.

According to a second aspect of the present invention, in the rotation phase difference adjusting device between the rotating members according to the first aspect, the spiral guide mechanism is formed on either the drive rotating member or the driven rotating member. It is composed of a profile guide and a profiled portion formed on the other side and performing a relative profile movement to the spiral profile guide. Further, in the rotational phase difference adjusting device between rotating members according to claim 3, a rotational phase difference adjusting device between the rotating members according to claim 1 and a rotational speed measuring device for measuring a rotational speed of a driving rotating member or a driven rotating member. And a storage unit that stores the rotation phase difference corresponding to the past rotation speed and the rotation phase difference corresponding to the current rotation speed obtained by the rotation speed measuring device, and the instantaneous angular position of the specific point of the drive rotating member. Phase difference measuring device that measures the instantaneous phase difference between the instantaneous angle position of the specific point of the driven rotary member and the rotational phase difference corresponding to the past rotational speed and the instantaneous rotational phase difference corresponding to the present rotational speed. Is provided between the driving member and the driven member and changes the relative axial position between the driving rotary member and the driven rotary member based on the target phase difference obtained by the comparator. Electromagnetic magnet And a configuration in which a door.

[0008]

[Action]

 In the first aspect, when the drive rotating member and the driven rotating member are slid relative to each other in the axial direction, the driven rotating member and the drive rotating member relatively rotate in the circumferential direction by the spiral guide mechanism. According to the present invention, when the driving rotary member and the driven rotary member are slid relative to each other in the axial direction, the copying portion follows the spiral guide (the spiral guide follows the copying portion). The drive rotation member and the driven rotation member relatively rotate in the circumferential direction. According to a third aspect of the present invention, an electromagnetic magnet relatively moves the driving rotary member and the driven rotary member in the axial direction so as to obtain a predetermined phase difference with respect to a predetermined rotational speed that is input in advance. Adjust.

[0009]

【Example】

 Next, an embodiment of the present invention will be described with reference to the drawings. 1 is a sectional view showing a first embodiment of the present invention, FIG. 2 is a sectional view taken along line 2-2 of FIG. 1, FIG. 3 is a sectional view showing a second embodiment of the present invention, and FIG. 4 is a third embodiment of the present invention. FIG. 5 is a sectional view showing an embodiment, FIG. 5 is a diagram showing a pulse generated as a result of the control circuit shown in FIG. 7 of the present invention, and FIG. 6 is a diagram showing a pulse generated as a result of the control circuit shown in FIG. 7 of the present invention. 7 is a block diagram showing a control circuit of the present invention, FIG. 8 is a sectional view showing a fourth embodiment of the present invention, and FIG. 9 is a sectional view taken along line 9-9 of FIG.

In FIGS. 1 and 2, an adjusting device 10 adjusts an instantaneous advance angle between a drive rotation shaft (drive rotation member) 11 and a driven rotation member (driven rotation members 12 and 13). . At least two guide portions 14 and 15 are integrally provided on the adjusting device so as to project and extend on the outer surface of the drive rotary shaft 11. The two guides 14, 15 shown in the exemplary embodiment are constructed with protruding helical rails of different (or the same) pitch. For convenience of assembly, the above spiral rail is formed on the outside of the cylinder with different diameter steps. Inner holes 16 and 17 are formed in the driven rotary members 12 and 13, and guide portions 18 and 19 are formed inside the inner holes 16 and 17, respectively. The two guides 18, 19 shown in the embodiment are inwardly recessed helical rails (or protruding helical rails), and the pitch is the same as the pitch of said protruding helical rails (or other curved rails). Is.

When the drive rotary shaft 11 rotates, the relative positions of the two driven rotary members 12 and 13 in the axial direction do not always change with respect to the base 20, and the drive rotary shaft 11 and the two driven rotary members 12 and 13 always operate. Synchronize and rotate integrally. Initially, the advance angles of the drive rotary shaft 11 and the two driven rotary members 12 and 13 are set to θ ₀ , respectively, and when the drive rotary shaft 11 moves in the axial direction, the two driven rotary members 12 and 13 are respectively moved. The guide portions 14 and 15 of the spiral rail are forcibly guided to θ ₁ and θ ₂ (see FIG. 2).

There are many methods for controlling the movement of the drive rotary shaft 11 in the axial direction, such as hydraulic drive, electromagnetic drive, step motor drive (including a linear step motor and a rotary step motor). The electromagnetic drive structure 21 in the embodiment includes a permanent magnet 22 and an electromagnet 23, the permanent magnet 22 is fixed to the drive rotating shaft 11, and the electromagnetic stone 23 is fixed on the base 20 (for example, an engine body is a base 2). Used as 0). The electromagnet 23 includes an iron core 24 and a coil 25. If the magnetic field of the electromagnet 23 and the magnetic field of the permanent magnet 22 are the same, they repel each other and push the driving rotary shaft 11 forward (right in the drawing). On the contrary, if the magnetic field is opposite, the rotating shaft 11 is pulled backward (to the left in the drawing).

The means for measuring the advance angle (or rotational phase difference) between the drive rotary shaft 11 and the two driven rotary members 12, 13 will be described in detail below. Reference numeral 30 is a rotating disk or gear, which rotates coaxially with the drive rotating shaft 11 by being fitted with a worm. Reference numeral 31 is a rotary disk or a rotary follower, which is coaxially fixed to the driven rotary members 12 and 13 and rotates. Reference numerals 32 and 33 denote through-holes (one or two are suitable) which are preliminarily formed at the edges of the two rotary disks 30 and 31. Two sets of photodetectors LD ₁ and LD ₂ are provided on both sides of the two rotating disks. Reference numerals 34 and 35 are light sources of the photodetectors LD ₁ and LD ₂ , and reference numerals 36 and 37 are semiconductors of the photodetectors L D ₁ and LD ₂ .

FIGS. 5 and 6 show pulse pulses generated by intermittently interrupting the light emitted from the light sources 34 and 35 toward the light receiving semiconductors 36 and 37 while the rotating disks 30 and 31 are rotating. FIG. If the advance angle between the rotating disks 30 and 31 is initially set to 0, the rotational phase difference detected by the photodetectors LD ₁ and LD ₂ becomes 0. In FIG. 5, A and B are the pulses captured by the detector LD ₁ and the detector LD ₂ , and the rotational phase difference is 0.

Since the rotational angle difference (rotational phase difference) between the rotating disks 30 and 31 is the rotational angle difference between the drive rotating shaft 11 and the driven rotating member 12, the rotational position of the pulse is changed by using the latest electronic technology. By calculating the phase difference and converting the phase difference of this pulse into the rotation angle difference between the rotary disks 30 and 31, the rotation angle difference (advance angle) between the drive rotary shaft 11 and the driven rotary member 12 is obtained. In addition, from the calculation of pulse A and pulse B, the rotational speed of the drive rotary shaft 1 1 is obtained.

FIG. 7 is a block diagram showing a control circuit of the present invention, which will be described in detail below. The circuit block 40 performs the integration of the rotation speed pulse A, and the measurement result is output as data D ₁ . The circuit block 41 is an advance angle measuring device, which calculates the phase difference between the pulse A and the pulse B, and the measurement result is output as data D ₃ . The circuit block 42 is a rotation speed storage unit in which data relating to the advance angle corresponding to each rotation speed is stored. These data are the first tested best advance (optimum advance for engine speed).

If each rotation speed is considered as a memory address, what is stored in each address is an optimum advance angle at each rotation speed. On the other hand, since D ₁ provides the rotation speed, the memory unit reads the optimum advance angle corresponding to the rotation speed and outputs it as data D ₂ . What is riding on D ₃ is the advance angle of the current drive rotary shaft 11 and driven rotary member 12, and D ₂ is the optimum advance angle that was initially tested and stored. The function of the comparator 43 for comparing D ₂ and D ₃ is as follows. (1) If D ₂ = D _3, then c = 0, a = 0, b = 0 (2) If D ₂ > D _3, then c = 1, a = 1, b = 0 (3) If D ₂ <D ₃ , c = 1, a = 0, b = 1 The oscillator 44 is for generating clock pulses. The AND gate 45 and counter 46 allow counting upwards and downwards. If a = 1, b = 0, the count is upward. If a = 0 and b = 1, the count is downward. If a = 0 and b = 0, it is not counted.

If D ₂ = D ₃ and a = 0 and b = 0, the counter 46 does not count. And if c = 0, the pulse prepared by oscillator 44 cannot enter the clock end of calculator 46. If D ₂ > D ₃ and a = 1 and b = 0, the counter counts upward. If c = 1, the pulse generated by the oscillator 44 enters the calculator 46 by the AND gate and counts upward, and the data D ₄ counted upward is gradually increased. As D ₄ increases the output from D / A converter 47, D / A converter 47 decreases the resistance of semiconductor 49, while the voltage obtained by coil 25 gradually increases. Reference numeral 48 is a variable resistance, and reference numeral 49 is a semiconductor that can serve as a resistance against a large current.

The above description shows that increasing D ₄ results in increasing the voltage of coil 25. If the magnetic field direction of the electromagnet 25 is designed to be opposite to the magnetic field direction of the permanent magnet, the thrust on the permanent magnet is large if the voltage across the electromagnet 25 is high. Then, the advance angle between the drive rotation shaft 11 and the driven rotation member 12 becomes large. The advance angle between the drive rotary shaft 11 and the driven rotary member 12 enters 43 from D ₃ and is compared with D ₂ until the result of the comparison is zero, and a and b are equal to zero. When D ₄ stabilizes, the voltage of 25 also stabilizes and the counter 46 stops calculating. Under such a circumstance, the advance angle of the drive rotary shaft 11 and the driven rotary member 12 is adjusted to the value initially set.

For the same reason, if D ₂ <D ₃ , counter 46 counts down until the voltage across 25 is gradually reduced to D ₂ = D ₃ . The principle of this part is not detailed here. The rotational phase difference between the other driven rotary member 13 and the driven rotary member 12 has already been mechanically determined by the relationship between the two members of the spiral groove type guide portions 14 and 15. That is, the relative relationship is mechanically determined at the manufacturing stage. The rotational phase difference (rotational angle difference) between the driving rotary shaft 11 and the driven rotary member 13 can be calculated from the pulse B generated by the rotary disc 31 without adding a new rotary disc to the rotary member 13. . The driven rotary member 12 and the driven rotary member 13 are probably designed for an air valve (intake / exhaust valve) camshaft (as shown in FIGS. 2 and 3), and the guide portions 18 and 19 are provided in the inner holes. The drive rotary shaft 11 of the present invention is used in place of the original cam shaft of the air valve.

FIG. 3 shows a second embodiment, in which the driven rotary members 12 and 13 are gears 12a and 13a, respectively, the gear 12a is used to drive the distributor shaft, and the other gears are used to drive the air valve cam shaft. Used. The guide parts 14, 15 and the driven (driven) guide parts 18, 19 may be replaced by ball drive screws or special curved guides according to actual needs. In addition, since the driven rotary members 12 and 13 contribute to the rotational phase difference (advance angle) with the drive rotary shaft 11 as the driven rotary members 12 and 13 move in the axial direction, the drive rotary shaft 11 is only involved in the axial rotation. .

FIG. 4 shows a third embodiment. The guide portion of the drive shaft 11 corresponds to the driven (driven) guide portion of the corresponding driven rotating member being replaced by the outer screw rail 19a, and the inner portion thereof. It is replaced by the spiral rail 15a. The invention is also applicable to non-slip differential gears or transmissions. FIG. 8 shows a fourth embodiment. One driven rotary shaft 12 driven by the drive rotary shaft 11, a guide part 14 'for the drive rotary shaft made of steel balls, and a guide part for the driven shaft made of a spiral groove. 12 ', if the rotation angle difference between the drive rotation shaft 11 and the driven rotation member 12' is changed, it is changed between the guide portion 14 'and the driven guide portion 16'.

In the above embodiment, the case where the rotary members are coaxially arranged has been described as an example. However, a plurality of rotary members that are meshed by the helical rails that constitute the helical guide mechanism are arranged in parallel. May have a different structure.

[0024]

[Effect of device]

 According to the first or second aspect of the present invention, the driven rotary member and the driven rotary member are slid relative to each other in the axial direction, whereby the driven rotary member and the drive rotary member are relatively rotated in the circumferential direction by the spiral guide mechanism. , It is possible to easily adjust the phase between both members accurately while rotating both members. According to a third aspect of the present invention, an electromagnetic magnet relatively moves the driving rotary member and the driven rotary member in the axial direction so as to obtain a predetermined phase difference with respect to a predetermined rotational speed that is input in advance. Since it is used to adjust the opening time of the automobile valve, excellent performance can be obtained in the entire range from low speed to high speed. Further, the present invention can be applied to a mechanism such as a differential gear that does not slip or a transmission.

[Brief description of drawings]

FIG. 1 is a sectional view showing a first embodiment of the present invention.

2 is a sectional view taken along line 2-2 of FIG.

FIG. 3 is a sectional view showing a second embodiment of the present invention.

FIG. 4 is a sectional view showing a third embodiment of the present invention.

FIG. 5 is a diagram showing a pulse having no phase difference generated in the control circuit shown in FIG. 7 of the present invention.

6 is a diagram showing a pulse having a phase difference generated in the control circuit shown in FIG. 7 of the present invention.

FIG. 7 is a block diagram showing a control circuit of the present invention.

FIG. 8 is a sectional view showing a fourth embodiment of the present invention.

9 is a sectional view taken along line 9-9 of FIG.

[Explanation of symbols]

 11 Drive Rotating Member 12, 13 Driven Rotating Member 14, 15 Helical Guide 18, 19 Helical Guide 23 Electromagnetic Magnet 30, 31 Lead Angle Measuring Device 41 Rotational Speed Measuring Device 42 Storage Unit 43 Comparator

Claims (3)

[Scope of utility model registration request] 1. A drive rotating member and at least one driven rotating member that is arranged concentrically or in parallel with the drive rotating member and rotates in synchronization, and a space between the drive rotating member and the driven rotating member. A helical guide mechanism for adjusting the rotational phase difference between the rotating members by relatively rotating the rotating members in the circumferential direction by relatively sliding the rotating members in the axial direction. Rotational phase difference adjusting device between rotating members. 2. The spiral guide mechanism includes a spiral guide formed on either one of a driving rotary member and a driven rotary member, and a copying portion formed on the other and performing a relative copying operation to the spiral guide. The rotational phase difference adjusting device between rotating members according to claim 1, wherein 3. A rotary phase difference adjusting device between rotary members according to claim 1, a rotary speed measuring device for measuring a rotary speed of a driving rotary member or a driven rotary member, and a rotary phase difference corresponding to a past rotary speed. And a storage unit for storing the rotational phase difference corresponding to the current rotational speed obtained by the rotational speed measuring device, the instantaneous angular position of the specific point of the driving rotary member and the instantaneous angular position of the specific point of the driven rotary member. Phase difference measuring device for measuring the instantaneous phase difference of the, and a comparator for comparing the rotational phase difference corresponding to the past rotational speed and the instantaneous rotational phase difference corresponding to the present rotational speed, the drive member and the driven And an electromagnetic magnet that is provided between the members and that changes a relative axial position between the drive rotation member and the driven rotation member based on the rotation phase difference obtained by the comparator. Rotation between rotating members Phase difference adjustment device.