JP4356451B2 - Automatic transmission - Google Patents

Description

  The present invention relates to an automatic transmission that automatically controls a shift operation of a transmission.

  Various types of automatic transmissions have been proposed for automatically performing movement of a shift lever of a transmission, that is, a shift operation, in a vehicle transmission or the like.

  For example, the present applicant has invented an automatic transmission as described in Patent Documents 1 and 2.

  The automatic transmission includes a select actuator that moves the shift lever of the transmission in the select direction, a shift actuator that moves the shift lever in the shift direction, and a control device that controls these actuators. Each of the select actuator and the shift actuator has an electromagnetic solenoid connected to the shift lever, and the control device moves the shift lever by controlling energization to the electromagnetic solenoid of both actuators.

JP 2002-372147 A JP 2003-14105 A JP 2002-340176 A

  By the way, in such a device using an electromagnetic solenoid as an actuator, there is a problem that the operation of the electromagnetic solenoid is reduced at a low temperature (for example, see Patent Document 3). In particular, in an automatic transmission, the viscosity of the lubricating oil of the transmission increases at low temperatures, and resistance to movement of the shift lever increases, making shifting operations difficult. As a result, even if the electromagnetic solenoid is energized, a situation may occur in which the speed change operation of the transmission (gear-out or gear-in of the shift lever) cannot be performed.

  Therefore, conventionally, when the gear release or gear-in of the shift lever is not completed by a single energization, retry control is performed in which energization of the same content is repeatedly executed with a predetermined rest period interposed therebetween.

  However, there have been cases where gear removal or gear-in is not completed even if energization is repeated for a considerable number of times, and the transmission cannot be shifted, or even if a shift can be performed, it takes a long time from the start to the completion of the shift.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to solve the above-described problems and provide an automatic transmission that can perform a speed change operation quickly and reliably.

  To achieve the above object, the present invention includes an electromagnetic solenoid for moving a shift lever of a transmission in a shift direction, and a control device for controlling energization of the electromagnetic solenoid, and the control device includes the shift lever. When a gear is disengaged from a predetermined gear stage or geared in to a predetermined gear stage, the electromagnetic solenoid is energized for a predetermined period of time. In the automatic transmission, the control device repeatedly increases the energization period for each increase in the number of energizations when repeatedly energizing the electromagnetic solenoid.

  Here, when energizing the electromagnetic solenoid, the control device bisects the energization period, first performs duty energization for duty control of the energization amount for the electromagnetic solenoid, and then performs energization amount for the electromagnetic solenoid. When the energization of the electromagnetic solenoid is repeatedly executed, the maximum energization period may be lengthened each time the energization frequency is increased.

  The control device further includes temperature detecting means for detecting the atmospheric temperature of the transmission, and the control device prolongs the energization period when the temperature detected by the temperature detecting means is lower than a predetermined temperature. Alternatively, the maximum energization period may be lengthened.

  The present invention further includes an electromagnetic solenoid for moving the shift lever of the transmission in the shift direction, and a control device for controlling energization of the electromagnetic solenoid, wherein the control device moves the shift lever from a predetermined gear stage. When the gear is released or geared in to a predetermined gear stage, the electromagnetic solenoid is energized for a predetermined period, and if the gear is not released or geared in by a single energization, the energization is repeatedly executed with a predetermined rest period. The transmission device, when energizing the electromagnetic solenoid, bisects the energization period, first performs duty energization for duty control of the energization amount to the electromagnetic solenoid, and then performs the electromagnetic energization. When maximum energization is performed to maximize the energization amount to the solenoid and energization of the electromagnetic solenoid is repeatedly executed , Each time the number of times of energization increases, is to increase the proportion of the maximum energization period for the energizing period.

  Here, the apparatus further includes temperature detection means for detecting the ambient temperature of the transmission, and the control device is configured to detect the maximum energization period when the temperature detected by the temperature detection means is lower than a predetermined temperature. You may make it perform the increase in a ratio.

  According to the present invention, as the number of times of energization of the electromagnetic solenoid increases, the energization period or amount of energization of the electromagnetic solenoid increases and the driving force for the shift lever increases. It can be removed. Accordingly, a speedy and reliable shifting operation can be performed.

  Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

  1 is a plan sectional view of the automatic transmission according to the present embodiment, FIG. 2 is a sectional view taken along the line II-II in FIG. 1, and FIG. 3 is a sectional view taken along the line III-III in FIG. The basic structure of the automatic transmission according to the present embodiment is the same as that described in Patent Document 1 previously filed by the present applicant, and the shift lever of the transmission is moved by an electromagnetic solenoid. Is.

  The automatic transmission 2 controls a select actuator 3 that moves a shift lever 35 of a transmission (not shown) in the select direction, a shift actuator 6 that moves the shift lever 35 in the shift direction, and controls these actuators 3 and 6. And a detecting means 13 and 14 for detecting the position of the shift lever 35.

  As shown in FIG. 2, in the present embodiment, there are four positions, the first select position SP1, the second select position SP2, the third select position SP3, and the fourth select position SP4, as the select position of the shift lever 35. The first select position SP1 is the reverse gear (R) and the first gear, the second select position SP2 is the second and third gear, and the third select position SP3 is the fourth and fifth gear. The fourth select position SP4 corresponds to the sixth gear.

  The select actuator 3 that moves the shift lever 35 in the select direction includes three casings 31a, 31b, and 31c that are formed in a substantially cylindrical shape and are connected along the select direction (lateral direction in FIGS. 1 and 2). The control shaft 12 connected to the shift lever 35 is disposed in the casings 31a, 31b, 31c.

  The control shaft 12 is rotatable in the left end casing 31a and is movable in the axial direction (select direction), and is rotatable in the central casing 31b and the right end casing 31c but is not movable in the axial direction. The first and second shafts 32 and 33 are connected to each other through a spline 37 so as not to be relatively rotatable and to be relatively movable in the axial direction. That is, the first shaft 32 can move relative to the second shaft 33 in the axial direction in the left end casing 31a. The right end portion of the second shaft 33 is rotatably supported in the right end casing 31c via a bearing 34.

  The shift lever 35 extends into the left end casing 31a through an opening 311a (see FIG. 2) formed in the left end casing 31a, and is connected to the first shaft 32 through the spline 38 so as not to be relatively rotatable. Further, the shift lever 35 is restricted from moving in the axial direction by the shoulder portion 32 a provided on the first shaft 32 and the snap ring 36, and cannot be moved relative to the first shaft 32 in the axial direction. ing.

  The select actuator 3 further includes an electromagnetic solenoid 4 for moving the first shaft 32 and the shift lever 35 in the select direction. The electromagnetic solenoid 4 includes a cylindrical case 41 connected to the left end of the left end casing 31a, an electromagnetic coil 42 disposed in the case 41, and a cylindrical shape provided in the electromagnetic coil 42 so as not to move in the axial direction. The fixed iron core 43, a cylindrical movable iron core 44 provided on the left side of the fixed iron core 43 so as to be coaxial and axially movable, and connected to the movable iron core 44, pass through the hollow portion of the fixed iron core 43, and the left end casing 31a. An operating rod 45 extending inward and a cover 46 attached to the left end of the case 41 are provided. The distal end portion of the operating rod 45 contacts the left end of the first shaft 32.

  The electromagnetic coil 42 of the electromagnetic solenoid 4 is connected to the control device 10 so that the electromagnetic coil 42 can be energized by the control device 10. When the electromagnetic coil 42 is energized, the fixed iron core 43 is magnetized to a magnetic force corresponding to the energization amount, and the movable iron core 44 is attracted to the fixed iron core 43 side by the magnetic force. As a result, a thrust is generated that pushes the shift lever 35 to the right in the select direction via the movable iron core 44, the operating rod 45, and the first shaft 32.

  The select actuator 3 further includes a select position restricting mechanism 5 that biases the first shaft 32 and the shift lever 35 to the left in the select direction (that is, the direction opposite to the thrust generated by the electromagnetic solenoid 4).

  The select position restricting mechanism 5 includes a first moving ring 51 provided on the outer periphery of the first shaft 32 so as to be movable in the axial direction, and second and second parts provided on the outer periphery of the second shaft 33 so as to be movable in the axial direction. Three moving rings 52 and 53, and a fixed ring 59 provided on the outer periphery of the second shaft so as not to move in the axial direction.

  The first moving ring 51 is restricted from moving leftward by a snap ring 58 mounted on the inner surface of the left end casing 31a and a shoulder 322 formed on the outer surface of the first shaft 32. A first compression coil spring 54 is disposed between the first movement ring 51 and the second movement ring 52, and a second compression coil spring 55 is disposed between the second movement ring 52 and the fixed ring 59, A third compression coil spring 56 is disposed between the second movement ring 52 and the third movement ring 53, and a fourth compression coil spring 57 is disposed between the third movement ring 53 and the fixed ring 59. . Here, the spring force of the first compression coil spring 54 is set smaller than the total spring force of the second compression coil spring 55 and the third compression coil spring 56. The spring force of the fourth compression coil spring 57 is set to be larger than the total spring force of the second compression coil spring 55 and the third compression coil spring 56.

  In the select actuator 3, when power is not supplied to the electromagnetic coil 42 of the electromagnetic solenoid 4 (when no power is supplied), the first moving ring 51, the first shaft 32, and the shift lever 35 are in the first to first directions. 4 urged to the left in the select direction by the spring force of the compression coil springs 54, 55, 56, 57, and the left end of the first moving ring 51 is located at the left limit position where it engages with the snap ring 58 (FIGS. 1 and 2). reference). At this time, the shift lever 35 is located at the first select position SP1 described above.

  Next, when a current of a first voltage (for example, 2 V) set in advance is applied to the electromagnetic coil 42 of the electromagnetic solenoid 4, the fixed iron core 43 is excited, and the first shaft 32 is interposed via the movable iron core 44 and the operating rod 45. In addition, a thrust to the right in the select direction is applied to the shift lever 35. In the first voltage, the thrust applied to the first shaft 32 and the shift lever 35 is larger than the spring force of the first compression coil spring 54, and the total spring of the second compression coil spring 55 and the third compression coil spring 56. It is set to be smaller than the force. Therefore, in this case, as shown in FIG. 4A, the first shaft 32 and the shift lever 35 move to the right in the select direction until the right end of the first moving ring 51 comes into contact with the left end of the second moving ring 52. . The second and third moving rings 52 and 53 are not displaced. At this time, the shift lever 35 is located at the second select position SP2.

  Next, when a current of a preset second voltage (for example, 4 V) is applied to the electromagnetic coil 42 of the electromagnetic solenoid 4, a large thrust is applied to the first shaft 32 and the shift lever 35. The second voltage is such that the thrust applied to the first shaft 32 and the shift lever 35 is greater than the total spring force of the first to third compression coil springs 54, 55, 56, and the spring force of the fourth compression coil spring 57. It is set to be smaller than that. Therefore, in this case, as shown in FIG. 4B, the first shaft 32 and the shift lever 35 move to the right in the select direction until the right end of the second moving ring 52 contacts the left end of the third moving ring 53. . Note that the third moving ring 53 is not displaced. At this time, the shift lever 35 is located at the third select position SP3.

  Next, when a current of a preset third voltage (for example, 8 V) is applied to the electromagnetic coil 42 of the electromagnetic solenoid 4, a larger thrust is applied to the first shaft 32 and the shift lever 35. The third voltage is set so that the thrust applied to the first shaft 32 and the shift lever 35 is larger than the total spring force of the first to fourth compression coil springs 54, 55, 56, and 57. Therefore, in this case, as shown in FIG. 4C, the first shaft 32 and the shift lever 35 move to the right limit position where the right end of the third moving ring 53 contacts the left end of the fixed ring 59. At this time, the shift lever 35 is located at the fourth select position SP4.

  As described above, the control device 10 can control the energization amount (energization voltage) of the electromagnetic solenoid 4 to the electromagnetic coil 42 to control the select position of the shift lever 35.

  Next, the shift actuator 6 that moves the shift lever 35 in the shift direction will be described mainly with reference to FIG.

  The shift actuator 6 is an operation rod 60 that is connected to the second shaft 33 of the select actuator 3 so as not to rotate relative to the second actuator 33, and is disposed on both lower ends of the operation rod 60. The operation rod 60 and the second shaft connected thereto. First and second electromagnetic solenoids 7 and 8 for rotating the shift lever 35 in the shift direction by rotating the 33 and the first shaft 32 are provided.

  The first and second electromagnetic solenoids 7 and 8 are respectively cylindrical cases 71 and 81 connected to the side of the central casing 31b, electromagnetic coils 72 and 82 disposed in the cases 71 and 81, and electromagnetic Cylindrical fixed iron cores 73 and 83 that are immovable in the coils 72 and 82, and cylindrical movable irons that are coaxial with the fixed iron cores 73 and 83 and movable in the axial direction (left and right in FIG. 3). The iron cores 74 and 84 are connected to the movable iron cores 74 and 84, and are attached to the operation rods 75 and 85 that contact the operation rod 60 through the hollow portions of the fixed iron cores 73 and 83, and the sides of the cases 71 and 81. And covers 76 and 86.

  The electromagnetic coils 72 and 82 of the first and second electromagnetic solenoids 7 and 8 are connected to the control device 10 so that the control device 10 can energize the electromagnetic coils 72 and 82. When the electromagnetic coils 72 and 82 are energized, the fixed iron cores 73 and 83 are magnetized to a magnetic force corresponding to the energization amount, and the movable iron cores 74 and 84 and the operating rods 75 and 85 are moved to the fixed iron core 73 and 83 side (in FIG. 3). , Center side). As a result, the distal end portion of the operating rod 60 is pressed by the operating rods 75 and 85, and the operating rod 60 and the first and second shafts 32 and 33 are rotated. As a result, the shift lever 35 is moved in the shift direction.

  For example, when the electromagnetic coil 72 of the left first electromagnetic solenoid 7 in FIG. 3 is energized, the operating rod 60 rotates counterclockwise in FIG. 3, and the shift lever 35 moves to the right in the shift direction in FIG. Conversely, when the electromagnetic coil 82 of the second electromagnetic solenoid 8 is energized, the operating rod 60 rotates clockwise in FIG. 3, and the shift lever 35 moves to the left in the shift direction.

  Note that the gear release / gear-in method of the shift lever 35 by the shift actuator 6 will be described in detail later.

  The detection means for detecting the position of the shift lever 35 is provided in the left end casing 31a of the select actuator 3, and the select position detection sensor 13 (FIG. 1) for detecting the axial position of the shift lever 35, that is, the select position. And a shift position detecting sensor 14 (see FIGS. 2 and 3) provided near the upper portion of the operating rod 60 of the shift actuator 6 and detecting the rotation angle of the operating rod 60, that is, the shift position of the shift lever 35. Reference). These sensors 13 and 14 are composed of position sensors, and the detected values are transmitted to the control device 10. The control device 10 determines the position of the shift lever 35 and the gear position of the transmission based on the detection values of the sensors 13 and 14.

  The automatic transmission 2 according to the present embodiment further includes a temperature sensor (temperature detection means) 15 that detects the atmospheric temperature of the transmission (here, the temperature of the lubricating oil). The temperature sensor 15 is provided in a transmission (not shown), and the detected value is transmitted to the control device 10.

  Now, in the automatic transmission device 2 of this embodiment having such a structure, the gear shifting operation of the transmission, specifically, the gear release or gear-in operation of the shift lever 35 can be performed quickly and reliably. Has been made. This will be described below.

  When the control device 10 releases the gear from the state in which the shift lever 35 is geared in to the neutral position to the neutral position, any of the first and second electromagnetic solenoids 7 and 8 (electromagnetic coils 72 and 82) of the shift actuator 6 is selected. One of them is energized to move the shift lever 35 in the shift direction. Similarly, when the shift lever 35 is geared into a predetermined gear stage from the neutral position, either the first or second electromagnetic solenoid 7 or 8 is energized to move the shift lever 35 in the shift direction.

  FIG. 5 shows the energization contents of one of the first and second electromagnetic solenoids 7 and 8 (hereinafter simply referred to as electromagnetic solenoid) by the control device 10. FIG. 5A shows energization contents when the transmission lubricant temperature detected by the temperature sensor 15 is equal to or higher than a predetermined temperature, and FIG. 5B shows when the lubricant temperature is lower than the predetermined temperature. The energization contents of are shown. That is, in this embodiment, the energization contents for the electromagnetic solenoids 7 and 8 are varied depending on the temperature of the lubricating oil of the transmission.

  As shown in FIG. 5A, when the lubricating oil temperature detected by the temperature sensor 15 is equal to or higher than a predetermined temperature, the control device 10 first sets a predetermined initial energization period Ts preset in the electromagnetic solenoids 7 and 8. Energize for 0.5 s here. This energization content will be further described. The control device 10 divides the initial energization period Ts into two, and first executes duty energization for duty-controlling the energization amount for the electromagnetic solenoids 7 and 8. More specifically, the control device 10 performs feedback control (for example, PID control) on the duty ratio for the electromagnetic solenoids 7 and 8 based on the detection value of the shift position detection sensor 14 during the duty energization period. As a result, the moving speed (gear removal or gear-in speed) of the shift lever 35 can be appropriately suppressed, an excessive load is applied to the synchronization mechanism of the transmission, and the shift lever 35 hunts across the neutral position when the gear is released. Can be prevented. In the present embodiment, the duty energization period is the first half 0.3 s of the energization period Ts.

  When the gear release or gear-in of the shift lever 35 is completed during the duty energization period, the control device 10 ends the energization of the electromagnetic solenoids 7 and 8. The determination of the gear release or gear-in completion of the shift lever 35 is made based on the detection value of the shift position detection sensor 14. Note that the completion of gear-in can also be determined based on the ratio of the rotational speeds of the input side and the output side of the transmission.

  If the gear release or gear-in of the shift lever 35 is not completed during the duty energization period, the control device 10 executes maximum energization that maximizes the energization amount to the electromagnetic solenoids 7 and 8 (duty ratio 100%). In this embodiment, the maximum energization period is the second half 0.2 s of the energization period Ts. In the maximum energization, the maximum driving force (thrust) is applied to the shift lever 35, so that the gear release or gear-in of the shift lever 35 is more easily performed.

  The duty energization and the maximum energization are executed continuously, and in this specification, energization that combines both energizations is referred to as one energization.

  If the gear release or gear-in of the shift lever 35 is not completed even after the first energization (energization period Ts) is executed, the control device 10 energizes the same content with a predetermined rest period (0.2 s here) interposed therebetween. Execute retry control that is executed repeatedly. The energization periods Tr1, Tr2,... And the energization content during the retry control are the same as the initial energization described above. That is, a duty energization of 0.3 s and a maximum energization of 0.2 s are executed. Of course, when the gear release or gear-in of the shift lever 35 is completed, the energization of the electromagnetic solenoids 7 and 8 is naturally terminated.

  On the other hand, when the lubricating oil temperature detected by the temperature sensor 15 is lower than the predetermined temperature, the control device 10 first sets in advance one of the electromagnetic solenoids 7 and 8 as shown in FIG. Energized for the predetermined low temperature initial energization period T's. This low-temperature initial energization period T's is set longer than the initial energization period Ts at normal times (when the lubricating oil temperature is equal to or higher than a predetermined temperature) (here, 1.0 s). That is, as described in the section “Problems to be Solved by the Invention”, when the lubricating oil temperature is low, it can be assumed that the gear release or gear-in operation of the shift lever 35 is difficult. The period during which the driving force (thrust) is applied to the is increased. The control device 10 bisects the low-temperature initial energization period T's, first performs the above-described duty energization, and then continuously performs maximum energization. In this embodiment, both the duty energization period and the maximum energization period are 0.5 s.

  If the gear release or gear-in of the shift lever 35 is not completed even after this initial energization (energization period T's) is executed, retry control is performed to repeatedly execute energization with a predetermined rest period (here 0.2s). Although it is executed, it should be noted that the energization period T′r1, T′r2,. That is, when the first retry control is executed, the energization period T'r1 is made longer than the initial energization period T's at low temperature (here, 1.2 s). Further, when executing the second and subsequent retry control, the energization period is made longer than the previous retry energization period.

  As described above, according to the automatic transmission device 2 of the present embodiment, when the lubricating oil temperature is low, the energization period is increased every time the energization frequency is increased, so that a driving force is applied to the shift lever 35. As a result, the gear release or gear-in operation of the shift lever 35 is more easily performed. As a result, the shift lever 35 can be disengaged or geared in at a faster stage than before (with a smaller number of energizations), and the speed change operation of the transmission can be executed quickly and reliably.

  By the way, as shown in FIG.5 (b), in this embodiment, whenever the energization frequency with respect to the electromagnetic solenoids 7 and 8 increases, only a maximum energization period is increased and the duty energization period is made the same. As described above, by increasing the maximum energization period during which the maximum driving force is applied to the shift lever 35, the gear release or gear-in of the shift lever 35 can be achieved more quickly.

  However, the present invention is not limited in this respect. For example, both the duty energization period and the maximum energization period may be increased, or the maximum energization period may be the same and only the duty energization period may be increased. Further, if the entire energization period increases, the duty energization period may be shortened and the maximum energization period may be lengthened. In short, it is sufficient that the energization period of one time for the electromagnetic solenoids 7 and 8 becomes longer each time the number of energizations increases.

  Furthermore, in the above-described embodiment, it has been described that the duty energization and the maximum energization are executed in one energization. However, the present invention is not limited in this respect, and only one of the duty energization and the maximum energization is executed. May be.

  Next, another embodiment of the present invention will be described with reference to FIG.

  FIG. 6 (a) shows the energization contents when the lubricating oil temperature of the transmission detected by the temperature sensor 15 is equal to or higher than a predetermined temperature, and the contents are the same as the form shown in FIG. 5 (a). It is. Therefore, the description is omitted here.

  FIG. 6B shows the energization contents when the lubricating oil temperature is lower than the predetermined temperature.

  In this embodiment, when the lubricating oil temperature is lower than the predetermined temperature, the control device 10 firstly has a predetermined low-temperature initial energization period T set in advance in one of the first and second electromagnetic solenoids 7 and 8. '' s (here 1.0s) is energized. The energization contents in the low-temperature initial energization period T ″ s are the same as the energization contents in the low-temperature initial energization period T ′s in the form shown in FIG.

  If the gear release or gear-in of the shift lever 35 is not completed even after this initial energization (energization period T ″ s) is performed, the energization is repeatedly performed with a predetermined rest period (0.2 s here) interposed therebetween. Retry control is executed. Here, regardless of the number of energizations, the energization periods T ″ r1, T ″ r2,... Of the retry control are all initial energization periods T ″ s (1.0 s) at low temperatures. Is the same. That is, in this embodiment, one energization period does not change regardless of the number of energizations.

  Instead, in this embodiment, every time the number of energizations increases, the ratio of the maximum energization period to the energization period in one energization is increased. That is, when the first retry control is executed, the ratio of the maximum energization period to the energization period T ″ r1 is set larger than the ratio of the maximum energization period in the initial energization. Here, the ratio of the maximum energization period in the first energization is 50%, and the ratio of the maximum energization period in the first retry energization (the second energization as a whole) is 80%. And when performing retry control after the 2nd time, the ratio of the largest energization period in the energization is made larger than the ratio in the last retry energization. In the present embodiment, the ratio of the maximum energization period is 100% in the second retry energization. Accordingly, when retry control is performed for the third time and thereafter, the maximum energization period is 100%.

  As described above, according to the automatic transmission device 2 of the present embodiment, when the lubricating oil temperature is low, the ratio of the maximum energization period increases every time the energization frequency increases, so that the maximum driving force is applied to the shift lever 35. The period (ratio) becomes longer, and the gear release or gear-in of the shift lever 35 is more easily performed. Therefore, the speed change operation of the transmission can be executed quickly and reliably.

  In the above-described two embodiments, the energization period is increased or the ratio of the maximum energization period is increased when the lubricant temperature detected by the temperature sensor 15 is lower than the predetermined temperature. Is not limited in this respect, and the energization period may be lengthened or the ratio of the maximum energization period may be increased regardless of the lubricating oil temperature. In other words, even if the lubricating oil temperature is equal to or higher than the predetermined temperature, the energization of the electromagnetic solenoids 7 and 8 is repeatedly performed. In such a case, it is possible to assume that the shift lever 35 is quickly disengaged or geared in by increasing the energization period or increasing the ratio of the maximum energization period for each energization. Can do.

  In the above embodiment, the sensor for detecting the temperature of the lubricating oil is shown as the temperature detecting means for detecting the ambient temperature of the transmission. However, the present invention is not limited in this respect, and the engine to which the transmission is connected. A sensor for detecting the cooling water temperature, a sensor for detecting the air temperature around the transmission, and the like can also be applied.

  Furthermore, the specific configuration of the automatic transmission 2 is shown as an example, and does not limit the present invention. For example, the present invention can be applied to any automatic transmission as long as the shift lever is moved by an electromagnetic solenoid, such as the one described in Patent Document 2 previously filed by the present applicant.

1 is a plan sectional view of an automatic transmission according to an embodiment of the present invention. It is the II-II sectional view taken on the line of FIG. It is the III-III sectional view taken on the line of FIG. (A) is a figure which shows the state in which the shift lever was located in the 2nd select position. (B) is a figure which shows the state which the shift lever was located in the 3rd select position. (C) is a figure which shows the state in which the shift lever was located in the 4th select position. (A) is a figure which shows the electricity supply content with respect to an electromagnetic solenoid when lubricating oil is more than predetermined temperature. (B) is a figure which shows the electricity supply content with respect to an electromagnetic solenoid when lubricating oil is low temperature from predetermined temperature. (A) is a figure which shows the electricity supply content with respect to an electromagnetic solenoid when lubricating oil is more than predetermined temperature in other embodiment. (B) is a figure which shows the electricity supply content with respect to an electromagnetic solenoid when lubricating oil is low temperature from predetermined temperature in other embodiment.

Explanation of symbols

2 automatic transmission device 3 select actuator 4 electromagnetic solenoid 6 shift actuator 7 first electromagnetic solenoid 8 second electromagnetic solenoid 10 control device 15 temperature sensor (temperature detection means)
13 Select position detection sensor 14 Shift position detection sensor 35 Shift lever 72 Electromagnetic coil 82 Electromagnetic coil

Claims (5)

An electromagnetic solenoid for moving a shift lever of the transmission in the shift direction, and a control device for controlling energization of the electromagnetic solenoid, wherein the control device removes the gear from the predetermined gear stage or performs a predetermined operation. An automatic transmission that energizes the electromagnetic solenoid for a predetermined period when gearing into a gear stage, and repeatedly performs energization across a predetermined rest period when gear removal or gear-in is not completed with a single energization. ,
When the energization of the electromagnetic solenoid is repeatedly executed, the control device extends the energization period once each time the energization frequency is increased.   When energizing the electromagnetic solenoid, the control device bisects the energization period, first performs duty energization for duty control of the energization amount for the electromagnetic solenoid, and then maximizes the energization amount for the electromagnetic solenoid. 2. The automatic transmission according to claim 1, wherein when the energization of the electromagnetic solenoid is repeatedly executed, the maximum energization period is lengthened each time the energization frequency is increased. A temperature detecting means for detecting the atmospheric temperature of the transmission;
The control device according to claim 1 or 2, wherein when the temperature detected by the temperature detecting means is lower than a predetermined temperature, the energization period is extended or the maximum energization period is extended. Automatic transmission. An electromagnetic solenoid for moving a shift lever of the transmission in the shift direction, and a control device for controlling energization of the electromagnetic solenoid, wherein the control device removes the gear from the predetermined gear stage or performs a predetermined operation. An automatic transmission that energizes the electromagnetic solenoid for a predetermined period when gearing into a gear stage, and repeatedly performs energization across a predetermined rest period when gear removal or gear-in is not completed with a single energization. ,
When energizing the electromagnetic solenoid, the control device bisects the energization period, first performs duty energization for duty control of the energization amount for the electromagnetic solenoid, and then maximizes the energization amount for the electromagnetic solenoid. And when the energization of the electromagnetic solenoid is repeatedly performed, the ratio of the maximum energization period to the energization period is increased every time the energization frequency is increased. apparatus. A temperature detecting means for detecting the atmospheric temperature of the transmission;
5. The automatic transmission according to claim 4, wherein the control device increases the ratio of the maximum energization period when the temperature detected by the temperature detecting means is lower than a predetermined temperature.

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