JP2008006982A - Shift controller for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To suppress action of a vehicle not intended by a driver while accomplishing enhancement of shift operability in the vehicle for performing shift operation by a momentary type shift lever. <P>SOLUTION: ECU executes a program including a step (S106) for receiving a shift position signal SA, i.e., a signal indicating the shift state required by the driver from a shift operation part (YES at S100) and starting an addition timer when it is determined that change of the present shift state is required (YES at S104); a step (S110) for determining an influence degree to action of the vehicle when the present shift state is changed according to a vehicle speed V; a step (S112) for changing a predetermined decision time TP according to the influence degree; and a step (S122) for stopping energization of a drive current I when an addition timer value does not reach to the decision time TP (NO at S114 and NO at S120). <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a shift control device for a transmission mounted on a vehicle, and more particularly to a shift control device that switches a shift position of a transmission according to a signal that detects a shift operation situation of a driver.

  Some automatic transmissions mounted on vehicles include a stepped automatic transmission composed of a fluid coupling such as a torque converter and a gear-type transmission mechanism, two pulleys whose effective diameter is changed by hydraulic pressure, and those There is a continuously variable automatic transmission composed of a metal belt wound around a pulley. In any type of automatic transmission, a vehicle having an automatic transmission is generally provided with a slide-type shift lever operated by a driver, and a shift position (for example, a shift position (for example, , Reverse drive position, forward drive position, neutral position). Recently, not only a shift operation device using such a slide type shift lever but also a so-called shift-by-wire shift operation device is known. Such a shift operation device has a configuration in which a driver's shift operation is detected by a sensor or a switch (sensors), and one position among a plurality of positions is selected according to the detection signal. Further, in the case of such a shift-by-wire system, the shift lever is not limited to a slide type, and so-called joystick type operation buttons and push button type operation elements have been proposed. In addition to these, for example, a shift-by-wire type shift operation device including an operator of another method such as a touch panel method, the state of the operator is automatically set to the state before the operation after the driver's operation. A return type operator (hereinafter referred to as “momentary type operator”) is employed. In a shift operating device having a momentary type operating element, when the operating element is held at one shift position by a driver for a predetermined time (determined time), the shift position requested by the driver is determined. Therefore, if the fixed time is uniformly set, the position position requested by the driver may not be fixed, and the automatic transmission may not be controlled to the power transmission state intended by the driver. Japanese Patent Laying-Open No. 2005-7993 (Patent Document 1) discloses a technique for appropriately responding to a driver's request in a shift operation device having a momentary function.

  The shift operation device for a transmission disclosed in this publication includes a path that reaches a plurality of shift positions (a forward travel position, a reverse travel position, and a neutral position), and a momentary type that is operated by the driver to move the path. And a movable part. The movable portion is held at a predetermined neutral position when not operated by the driver. The shift operating device corresponds to the recognized shift position and the recognition means for recognizing the shift position requested by the driver by holding the movable portion at the shift position for a predetermined recognition time. Output means for outputting a control signal for the transmission so as to be in a power transmission state. The route includes a neutral position, a forward travel position (or reverse travel position), and a neutral position provided between the neutral position and the forward travel position (or reverse travel position). When it is recognized that it is in the forward travel position, the power transmission state by the transmission is set to the forward travel state, and when it is recognized that it is in the neutral position, the power transmission state by the transmission is set to the neutral state. The shift operation device further includes detection means for detecting the vehicle speed of the vehicle on which the shift operation device is mounted, and means for changing the recognition time for recognizing that the vehicle is at the neutral position when the vehicle speed is low. Including. In addition, the direction in which the movable part moves between the neutral position and the neutral position is different from the direction in which the movable part moves between the neutral position and the forward travel position (or the reverse travel position). A route is provided.

According to the shift operation device disclosed in this publication, for example, when the neutral position recognition time is set to be long so as not to recognize the neutral position that passes when the movable portion returns from the forward travel position to the neutral position. There is. In such a case, when the vehicle speed is low, the recognition time for recognizing the neutral position requested by the driver is set short. Therefore, in a high vehicle speed state in which a change in the power transmission state by the transmission is not required, while suppressing a misrecognition of the neutral position due to a simple passage, in a low vehicle speed state in which a change in the power transmission state by the transmission is likely to be required, You can immediately recognize that it is a position. Thereby, it is possible to appropriately respond to the driver's request.
JP-A-2005-7993

  By the way, in the shift-by-wire type shift operation device, the shift lever and the transmission are not electrically connected by a link mechanism or the like but electrically connected by a wire harness or the like. Therefore, the shift operation device has few restrictions on the arrangement position, and may be arranged near the steering wheel, for example. In such a case, for example, even when the driver unintentionally touches the shift lever when operating the steering wheel, the shift position is erroneously recognized, and the operation of the vehicle is an operation that is not intended by the driver. There is a possibility.

  In the shift operation device disclosed in Patent Document 1, the moving path of the movable part has two directions (a direction from the neutral position to the neutral position and a direction from the neutral position to the forward travel position (or the reverse travel position)). become. Therefore, the shift lever is prevented from moving to the forward travel position and the reverse travel position due to an erroneous operation. Thereby, it is suppressed that the operation | movement of a vehicle becomes an operation | movement which a driver | operator does not intend. However, on the other hand, when the driver intends to change the power transmission state to the forward traveling state or the backward traveling state, it is necessary to move the shift lever in two directions, and the shift operability is impaired. .

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a shift control device that suppresses the operation of the vehicle that is not intended by the driver while improving the shift operability. It is.

  A shift control device according to a first aspect of the present invention is a shift control device for a transmission mounted on a vehicle. This shift control device is held in a predetermined neutral position when not operated by the driver, and is moved from the neutral position to one of a plurality of shift positions by an operation in one direction, respectively, when operated by the driver. A shift operation unit having a momentary movable unit, means for determining a shift position requested by the driver by holding the movable unit at a predetermined fixed time at the shift position, and a fixed shift position And a means for outputting a control signal for realizing a power transmission state corresponding to the vehicle and a degree of influence on the operation of the vehicle due to the realization of the corresponding power transmission state. Change means.

According to the first invention, the shift operation unit includes a momentary movable unit that is moved from one of the neutral positions to any one of the plurality of shift positions by an operation in one direction. For example, the shift operation unit includes a movable unit that moves in a direction along at least one of a linear shape and an arc shape in which a plurality of shift positions are arranged. The shift operation unit includes a movable unit that rotates about a rotation axis on which a plurality of shift positions are arranged. For this reason, the driver can move the movable part from the neutral position to each shift position in one direction (for example, the linear direction along the movement path of the movable part up to each shift position, the arc direction, or each shift position). Rotation direction of the movable part), and the shift operability is improved. On the other hand, all shift positions may be erroneously recognized due to an erroneous operation of the movable part. Therefore, the shift position required by the driver is determined by holding the movable portion at the shift position for a predetermined time. Further, the fixed time is changed based on the degree of influence on the operation of the vehicle by realizing the power transmission state corresponding to the fixed shift position. For example, when the degree of influence on the operation of the vehicle is large, the determination time is changed to be longer than when the degree of influence is small. As a result, when the degree of influence on the operation of the vehicle is large, the shift position is difficult to be determined unless the driver intentionally holds the movable part at the shift position. Therefore, the operation of the vehicle that is not intended by the driver due to an erroneous operation of the movable part can be suppressed. As a result, it is possible to provide a shift control device that suppresses the operation of the vehicle that is not intended by the driver while improving the shift operability.

  In the shift control device according to the second invention, in addition to the configuration of the first invention, the changing means is a means for changing the influence time so that the fixed time becomes longer than when the influence degree is small. including.

  According to the second invention, when the degree of influence on the operation of the vehicle is large, the fixed time is changed as compared with the case where the influence is small. As a result, when the degree of influence on the operation of the vehicle is large, the shift position is difficult to be determined unless the driver intentionally holds the movable part at the shift position. Therefore, the operation of the vehicle that is not intended by the driver due to an erroneous operation of the movable part can be suppressed.

  The shift control apparatus according to the third invention further includes a determination means for determining the influence degree based on the driving state of the vehicle in addition to the configuration of the second invention.

  According to the third aspect of the invention, the degree of influence on the operation of the vehicle due to the realization of the power transmission state corresponding to the determined shift position differs depending on the driving state of the vehicle. For example, when the power transmission state changes from the forward traveling state to the backward traveling state at the time of stopping or at a low vehicle speed, the vehicle smoothly moves backward and the operation of the vehicle becomes a stable operation. On the other hand, when the power transmission state changes from the forward traveling state to the backward traveling state at high vehicle speeds, an extremely large load is instantaneously applied to the transmission and the engine, and the operation of the vehicle is unstable which is not intended by the driver. It becomes operation. Therefore, when the vehicle speed is high, it can be said that the degree of influence on the operation of the vehicle due to the change in the power transmission state is greater than when the vehicle speed is low. Further, when the braking force acting on the vehicle is small, the power transmitted from the transmission acts on the vehicle as a larger driving force than when the braking force is large, and the operation of the vehicle changes more greatly. Therefore, when the braking force is small, it can be said that the influence on the operation of the vehicle due to the change of the power transmission state is larger than when the braking force is large. Therefore, the degree of influence is determined based on the driving state of the vehicle. For example, when the speed of the vehicle is large, it is determined that the influence degree is larger than when the vehicle speed is small. Further, it is determined that the degree of influence is large when the amount of depression of the brake pedal is small compared to when it is large. Accordingly, it is possible to appropriately determine the degree of influence on the operation of the vehicle based on the driving state of the vehicle.

  In the shift control device according to the fourth aspect of the invention, in addition to the configuration of the third aspect of the invention, the judging means includes means for judging the degree of influence based on the speed of the vehicle.

According to the fourth invention, for example, when the power transmission state changes from the forward traveling state to the backward traveling state at the time of stopping or at a low vehicle speed, the vehicle moves backward smoothly and the operation of the vehicle becomes a stable operation. . On the other hand, when the power transmission state changes from the forward traveling state to the backward traveling state at high vehicle speeds, an extremely large load is instantaneously applied to the transmission and the engine, and the operation of the vehicle is unstable which is not intended by the driver. It becomes operation. Therefore, when the vehicle speed is high, it can be said that the degree of influence on the operation of the vehicle due to the change in the power transmission state is greater than when the vehicle speed is low. Therefore, the degree of influence is determined based on the speed of the vehicle. For example, when the speed of the vehicle is large, it is determined that the influence degree is larger than when the vehicle speed is small. Accordingly, it is possible to appropriately determine the degree of influence on the operation of the vehicle based on the speed of the vehicle.

  In the shift control device according to the fifth aspect of the invention, in addition to the configuration of the fourth aspect of the invention, the judging means includes means for judging that the degree of influence is greater when the speed is higher than when the speed is low.

  According to the fifth aspect of the present invention, it is possible to appropriately determine that the degree of influence on the operation of the vehicle is large at a high vehicle speed at which an unstable vehicle operation unintended by the driver is caused by a change in the power transmission state.

  In the shift control device according to the sixth aspect of the invention, in addition to the configuration of the third aspect of the invention, the judging means includes means for judging the degree of influence based on the depression amount of the brake pedal of the vehicle.

  According to the sixth invention, when the braking force acting on the vehicle is small, the power transmitted from the transmission acts on the vehicle as a larger driving force than when the braking force is large, and the operation of the vehicle changes more greatly. Therefore, when the braking force is small, it can be said that the influence on the operation of the vehicle due to the change of the power transmission state is larger than when the braking force is large. Therefore, the influence degree is determined based on the depression amount of the brake pedal. For example, it is determined that the degree of influence is large when the amount of depression of the brake pedal is small compared to when it is large. Accordingly, it is possible to appropriately determine the degree of influence on the operation of the vehicle based on the depression amount of the brake pedal.

  In the shift control device according to the seventh aspect of the invention, in addition to the configuration of the sixth aspect of the invention, the judging means includes means for judging that the degree of influence is larger when the stepping amount is small than when the stepping amount is large. .

  According to the seventh aspect of the present invention, it is possible to appropriately determine that the degree of influence on the operation of the vehicle is large when the vehicle operation changes more greatly due to the change of the power transmission state and the braking force is small.

  In the shift control device according to the eighth invention, in addition to the configuration of any one of the first to seventh inventions, the changing means is determined based on the shift position held by the driver in addition to the influence degree. Includes means for changing the time.

  According to the eighth aspect of the invention, there may be a case where it is desired to set the transmission in a neutral state even during forward traveling, for example, in order to suppress a driving force that has increased due to a malfunction of the vehicle control system. There may be a case where it is desired to return the transmission in the neutral state to the forward traveling state. On the other hand, it is unlikely that the transmission is in the reverse travel state during forward travel. Therefore, the fixed time is changed based on the shift position held by the driver in addition to the influence degree. For example, when the shift position held by the driver is the forward travel position, the fixed time is set shorter than when the shift position is the reverse travel position. Therefore, the deterministic time can be changed according to the necessity or urgency of the shift position held by the driver while considering the degree of influence on the operation of the vehicle.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, the same parts are denoted by the same reference numerals. Their names and functions are also the same. Therefore, detailed description thereof will not be repeated.

<First Embodiment>
A vehicle equipped with a shift control device according to an embodiment of the present invention will be described with reference to FIG. This vehicle is an FF (Front engine Front drive) vehicle. A vehicle other than FF may be used.

  The vehicle includes an engine 100, an automatic transmission 200, a torque converter 400, a differential gear 500, a drive shaft 600, a front wheel 700, and an ECU (Electronic Control Unit) 800.

  Engine 100 is an internal combustion engine that burns a mixture of fuel and air injected from an injector (not shown) in a combustion chamber of a cylinder. The piston in the cylinder is pushed down by the combustion, and the crankshaft is rotated.

  Automatic transmission 200 is connected to engine 100 via torque converter 400. Automatic transmission 200 changes the rotational speed of the crankshaft to a desired rotational speed by forming a desired gear stage.

  The output gear of automatic transmission 200 meshes with differential gear 500. A drive shaft 600 is connected to the differential gear 500 by spline fitting or the like. Power is transmitted to the left and right front wheels 700 via the drive shaft 600.

  An actuator 210 is attached to the automatic transmission 200. Actuator 210 is driven by drive current I from ECU 800 and controls automatic transmission 200 to be in a desired power transmission state (forward traveling state, reverse traveling state, neutral state).

  A vehicle speed sensor 810, a shift operation unit 820, and a stroke sensor 850 of the brake pedal 840 are connected to the ECU 800 via a harness or the like.

  Vehicle speed sensor 810 detects the speed of the vehicle from the rotational speed of drive shaft 600 and transmits a signal representing the detection result to ECU 800.

  The shift operation unit 820 is disposed in the vicinity of the steering wheel so that the driver can perform a shift operation while holding the steering wheel. The shift operation unit 820 is provided with a shift lever that is operated when the driver requests to change the shift position. Shift operation unit 820 detects the shift position at which the shift lever is held, and transmits to ECU 800 a shift position signal SA that is a signal representing the held shift position. The shift operation unit 820 will be described later.

  Stroke sensor 850 detects a depression amount B of brake pedal 840 by the driver, and transmits a signal representing the detection result to ECU 800.

  ECU 800 determines whether the vehicle is in a desired running state based on signals sent from vehicle speed sensor 810, shift operation unit 820, stroke sensor 850, etc., information stored in a storage unit (not shown), a map, a program, and the like. The equipment is controlled so that

  The shift operation unit 820 shown in FIG. 1 will be described with reference to FIG. The shift operation unit 820 includes a shift lever 822 and a linear groove 824 in which the shift lever 822 moves.

  The shift lever 822 is a momentary shift lever, and is always in the neutral position when the driver releases his hand from the shift lever 822. The position of the shift lever 822 shown in FIG. 2 is the neutral position, and the neutral position is located at the center of the groove 824.

  The R position (reverse travel position) at which the automatic transmission 200 is in the reverse travel state is located at the end of the groove 824 (the upper end in FIG. 2).

  The D position (forward travel position) where the automatic transmission 200 is in the forward travel state is located at the end (lower end in FIG. 2) of the groove 824 on the opposite side to the R position.

  The N position (neutral position) at which the automatic transmission 200 is in the neutral state is located in the middle of the R position and the neutral position and in the middle of the D position and the neutral position.

  That is, the R position, the N position, the neutral position, and the D position are linearly arranged in the groove portion 824. Therefore, when the shift lever 822 is moved to any of the R position, the N position, and the D position, the driver operates the shift lever 822 in one direction (a linear direction along the groove portion 824). You can move to a position.

  When the shift lever 822 reaches the N position from the neutral position by the driver's operation (see arrow 840), the shift operation unit 820 transmits a shift position signal SA (N) indicating the N position to the ECU 800. The shift operation unit 820 continuously transmits the shift position signal SA (N) while the shift lever 822 is held at the N position.

  When the shift lever 822 reaches the R position from the neutral position via the N position by the driver's operation (see arrow 842), the shift operation unit 820 transmits a shift position signal SA (R) indicating the R position to the ECU 800. To do. The shift operation unit 820 continuously transmits the shift position signal SA (R) while the shift lever 822 is held at the R position.

  When the shift lever 822 reaches the D position from the neutral position via the N position by the driver's operation (see arrow 844), the shift operation unit 820 transmits a shift position signal SA (D) indicating the D position to the ECU 800. To do. The shift operation unit 820 continuously transmits the shift position signal SA (D) while the shift lever 822 is held at the D position.

  For example, when the driver wants to shift from the neutral state to the forward traveling state, the shift lever 822 in the neutral position is moved to the D position and held. The shift request of the driver is recognized by the shift lever 822 being held in the D position for a predetermined fixed time TP or longer. Thereafter, when the driver releases the shift lever 822, the shift lever 822 returns from the D position to the neutral position via the N position.

  A parking position button 830 is provided at the end of the shift lever 822. By pressing the parking position button 830, the parking position is set.

In the present embodiment, ECU 800 receives the shift position signal SA transmitted from shift operation unit 820 for a predetermined determination time TP or more, thereby determining the shift state requested by the driver. ECU 800 energizes actuator 210 with drive current I for bringing automatic transmission 200 into a determined shift state.

  Further, ECU 800 automatically forms one of a plurality of gear stages according to a separately determined shift diagram when drive current I is a current that requires a forward travel state (D position). Thus, the automatic transmission 200 is controlled. The automatic transmission 200 can transmit the driving force to the front wheels 700 by forming any one of the plurality of gear stages.

  With reference to FIG. 3, a control structure of a program executed by ECU 800 constituting the shift control apparatus according to the present embodiment will be described.

  In step (hereinafter, step is abbreviated as S) 100, ECU 800 determines whether or not shift position signal SA is received from shift operation unit 820. When shift position signal SA is received (YES in S100), the process proceeds to S102. Otherwise (NO in S100), the process returns to S100.

  In S102, ECU 800 reads the current shift state of automatic transmission 200 from the storage unit.

  In S104, ECU 800 determines whether or not the current shift state needs to be changed. For example, ECU 800 determines the current shift state when the shift state requested by shift position signal SA (any one of SA (N), SA (R), and SA (D)) differs from the current shift state. Judge that it needs to be changed. If it is necessary to change (YES in S104), the process proceeds to S106. Otherwise (NO in S104), the process returns to S100.

  In S106, ECU 800 starts an addition timer. In S108, ECU 800 detects vehicle speed V based on the signal transmitted from vehicle speed sensor 810.

  In S110, ECU 800 determines, according to vehicle speed V, the degree of influence on the operation of the vehicle when the current shift state is changed. For example, as shown in FIG. 4, the ECU 800 has a small influence when the vehicle speed V is smaller than a predetermined vehicle speed V (1), and the vehicle speed V is larger than a predetermined vehicle speed V (1) and is predetermined. When the vehicle speed V (2) (> V (1)) is smaller than the predetermined vehicle speed V (2), the influence degree is medium, and when the vehicle speed V is higher than the predetermined vehicle speed V (2), the influence degree is large. . Note that the method for determining the degree of influence is not limited to this.

  In S112, ECU 800 changes predetermined fixed time TP in accordance with the degree of influence. For example, as shown in FIG. 4, the ECU 800 sets the value of the fixed time TP to TP (1) when the influence is small, and TP (2) (> TP (1)) when the influence is medium. In addition, if the degree of influence is large, it is changed to TP (3) (> TP (2)). Note that the method of changing the fixed time TP is not limited to this.

  In S114, ECU 800 determines whether or not the addition timer value is fixed time TP. If it is fixed time TP (YES in S114), the process proceeds to S116. Otherwise (NO in S114), the process proceeds to S120.

  In S116, ECU 800 energizes actuator 210 with drive current I for making the shift state requested by shift position signal SA. In S118, ECU 800 stores the changed shift state in the storage unit.

  In S120, ECU 800 determines whether or not shift position signal SA is continuously received. If it is continuously received (YES in S120), the process returns to S114. Otherwise (NO in S120), the process proceeds to S122. In S122, ECU 800 stops energization of drive current I to actuator 210.

  An operation of the shift control apparatus according to the present embodiment based on the above-described structure and flowchart will be described.

  Assume that when the driver is driving the vehicle forward at high speed, the driver unintentionally touches the shift lever 822 and the shift lever 822 moves from the neutral position to the R position.

  When shift position signal SA (R) is received (YES in S100), it is read from the storage unit that the current shift state of automatic transmission 200 is the forward travel state (S102), and from the forward travel state to the reverse travel state. Therefore, the addition timer is started (S106).

  When the shift state changes from the forward traveling state to the backward traveling state at the time of stopping or at a low vehicle speed, the vehicle moves backward smoothly and becomes a stable operation. On the other hand, when the shift state changes from the forward traveling state to the reverse traveling state at a high vehicle speed, an extremely large load is instantaneously applied to the automatic transmission 200 and the engine 100, and the operation of the vehicle is unstable that the driver does not intend. It becomes the operation. Therefore, when the vehicle speed is high, it can be said that the degree of influence on the operation of the vehicle due to the shift state changing from the forward traveling state to the backward traveling state is greater than when the vehicle speed is small.

  Therefore, when the vehicle speed V is detected (S108) and the vehicle speed V is greater than the predetermined vehicle speed V (2), it is determined that the degree of influence by changing to the reverse traveling state is large (S110), and the fixed time TP. Is changed to the longest TP (3). Thus, unless the driver intentionally holds the shift lever 822 at the R position, it is difficult to determine the R position. Since the shift lever 822 has only been moved to the R position due to an erroneous operation by the driver, the shift lever 822 immediately returns to the neutral position. Therefore, the addition timer value does not reach the fixed time TP (3) (NO in S114), reception of shift request signal SA (R) is interrupted (NO in S120), and energization of drive current I is stopped. (S122). Thereby, the shift change to the reverse running state which the driver does not intend is suppressed.

  As described above, according to the shift control device according to the present embodiment, the shift lever moves in the groove portion in which the R position, the N position, the neutral position, and the D position are linearly arranged. Therefore, the shift lever can be moved to each shift position by operating in one direction. As a result, the shift operability is improved, but at the same time, the erroneous operation of the shift lever may be increased. Therefore, the degree of influence on the operation of the vehicle by changing the shift state is determined based on the vehicle speed, and when it is determined that the degree of influence is large, the determination time TP for determining the shift state is lengthened. Changed to As a result, it is possible to suppress an unstable vehicle operation that is not intended by the driver due to an erroneous operation of the shift lever, while improving the shift operability.

In the present embodiment, as shown in FIG. 2, the shift operation unit 820 including the shift lever 822 that moves the linear groove 824 has been described, but the shift lever 822 is moved from the neutral position to each shift position. The shift operation unit applicable to the shift control device according to the present invention is not limited to this as long as it can be moved by operation in one direction without changing the operation direction.

  For example, as shown in FIG. 5, even a shift operation unit 1820 including a shift lever 1822 that moves along a groove 1824 formed in an arc shape on the outer periphery of a column cover 1828 disposed in the vicinity of the steering wheel 1826. The present invention can be applied to the shift control device according to the present invention.

  Further, for example, as shown in FIG. 6, even a shift operation unit 2820 including a shift rotor 2822 that rotates around a rotation shaft in which an R position, an N position, a neutral position, and a D position are arranged is related to the present invention. It can be applied to a shift control device.

<Second Embodiment>
Hereinafter, the shift control apparatus according to the present embodiment will be described. The shift control device according to the present embodiment is different from the configuration of the shift control device according to the first embodiment described above in that ECU 1800 is included instead of ECU 800. ECU 800 and ECU 1800 differ in the control structure of the program to be executed. The configuration other than these is the same as the configuration of the shift control device according to the first embodiment described above. Their functions are the same. Therefore, detailed description thereof will not be repeated here.

  With reference to FIG. 7, a control structure of a program executed by ECU 1800 configuring the shift control apparatus according to the present embodiment will be described. In the flowchart shown in FIG. 7, the same steps as those in the flowchart shown in FIG. 3 are given the same step numbers. The processing is the same for them. Therefore, detailed description thereof will not be repeated here.

  In S200, ECU 1800 detects a depression amount B of brake pedal 850 based on a signal transmitted from stroke sensor 860.

  In S202, ECU 1800 determines the degree of influence on the operation of the vehicle when changing the current shift state in accordance with stepping amount B. For example, as shown in FIG. 8, the ECU 800 determines that the degree of influence is large when the stepping amount B is smaller than a predetermined stepping amount B (1), and the stepping amount B (1) with the stepping amount B being determined in advance. If it is larger, it is determined that the degree of influence is small. Note that the method for determining the degree of influence is not limited to this.

  According to the shift control device of the present embodiment, the power transmitted from automatic transmission 200 to front wheel 700 acts on the vehicle as a larger driving force when the braking force acting on the vehicle is small than when the braking force is large. The behavior of the vehicle changes more greatly. Therefore, when the braking force is small, it can be said that the degree of influence on the operation of the vehicle due to the change of the shift state is larger than when the braking force is large.

  Therefore, the depression amount B of the brake pedal 850 is detected (S200), and when the depression amount B is smaller than the predetermined depression amount B (1), it is determined that the influence degree is large (S202). As a result, when the power transmitted from the transmission acts as a larger driving force and the braking force is small, it is determined that the degree of influence on the operation of the vehicle due to the shift change is large, and the determination time is lengthened. Can be changed.

<Third Embodiment>
Hereinafter, the shift control apparatus according to the present embodiment will be described. The shift control device according to the present embodiment is different from the configuration of the shift control device according to the first embodiment described above in that ECU 2800 is included instead of ECU 800. ECU 800 and ECU 2800 differ in the control structure of the program to be executed. The configuration other than these is the same as the configuration of the shift control device according to the first embodiment described above. Their functions are the same. Therefore, detailed description thereof will not be repeated here.

  With reference to FIG. 9, a control structure of a program executed by ECU 2800 constituting the shift control apparatus according to the present embodiment will be described. In the flowchart shown in FIG. 9, the same steps as those in the flowchart shown in FIG. 3 are given the same step numbers. The processing is the same for them. Therefore, detailed description thereof will not be repeated here.

  In S300, ECU 2800 detects the shift position held by the driver based on shift position signal SA (any one of SA (N), SA (R), and SA (D)).

  In S302, ECU 2800 changes predetermined fixed time TP based on the degree of influence on the operation of the vehicle when changing the current shift state and the shift position held by the driver. For example, as shown in FIG. 10, ECU 800 sets the value of fixed time TP to be longer as the degree of influence increases, and when the shift position to be held is the R position, compared to the N position and the D position. To make the fixed time TP longer. Note that the method of changing the fixed time TP is not limited to this.

  According to the shift control device of the present embodiment, there may be a case where it is desired to set the transmission in a neutral state even during forward traveling, for example, in order to suppress the driving force that has increased due to a malfunction of the vehicle control system. . There may be a case where it is desired to return the transmission in the neutral state to the forward traveling state. On the other hand, it is unlikely that the transmission is in the reverse travel state during forward travel. That is, during forward running, the N position and the D position are more urgent and more urgent than the R position.

  Accordingly, the shift position held by the driver is detected (S300), and the value of the fixed time TP is set longer as the influence degree (S110) determined according to the vehicle speed V is larger. Further, when the shift positions to be held are the N position and the D position, the determination time TP is changed to be shorter than that in the R position (S302). As a result, it is possible to easily determine the N position and the D position, which can be said to have a high necessity and urgent shift change.

  In this embodiment, the influence on the operation of the vehicle is determined based on the vehicle speed V. However, as described in the second embodiment, the influence on the operation of the vehicle is determined by the brake pedal. The determination may be made based on the depression amount B of 850.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

It is a schematic block diagram which shows the power train controlled by ECU which is the shift control apparatus which concerns on the 1st Embodiment of this invention. It is FIG. (1) which shows the shift operation part with which the vehicle by which the shift control apparatus which concerns on the 1st Embodiment of this invention is mounted is equipped. It is a flowchart which shows the control structure of the program which ECU which is the shift control apparatus which concerns on the 1st Embodiment of this invention performs. It is a figure which shows the relationship between the influence degree to the operation | movement of the vehicle at the time of shift change, vehicle speed, and fixed time in the shift control apparatus which concerns on the 1st Embodiment of this invention. It is FIG. (2) which shows the shift operation part with which the vehicle by which the shift control apparatus which concerns on the 1st Embodiment of this invention is mounted is equipped. It is FIG. (3) which shows the shift operation part with which the vehicle by which the shift control apparatus which concerns on the 1st Embodiment of this invention is mounted is equipped. It is a flowchart which shows the control structure of the program which ECU which is a shift control apparatus which concerns on the 2nd Embodiment of this invention performs. It is a figure which shows the relationship between the influence degree to the operation | movement of the vehicle at the time of a shift change, the depression amount of a brake pedal, and fixed time in the shift control apparatus which concerns on the 2nd Embodiment of this invention. It is a flowchart which shows the control structure of the program which ECU which is a shift control apparatus which concerns on the 3rd Embodiment of this invention performs. It is a figure in the shift control apparatus which concerns on the 3rd Embodiment of this invention which shows the relationship between the influence degree to the operation | movement of the vehicle at the time of a shift change, a vehicle speed, the shift position hold | maintained, and fixed time.

Explanation of symbols

  100 engine, 200 automatic transmission, 210 actuator, 400 torque converter, 500 differential gear, 600 drive shaft, 700 front wheel, 800, 1800, 2800 ECU, 810 vehicle speed sensor, 820, 1820, 2820 shift operation unit, 822, 1822 shift lever , 824, 1824 groove, 850 brake pedal, 860 stroke sensor, 1826 steering wheel, 1828 column cover, 2822 shift rotor.

Claims (8)

A shift control device for a transmission mounted on a vehicle,
Momentary-type movable part that is held in a predetermined neutral position when not operated by the driver, and is moved to one of a plurality of shift positions from the neutral position by one direction operation when operated by the driver. A shift operation unit comprising:
Means for determining a shift position requested by a driver by holding the movable portion at a predetermined fixed time at the shift position;
Means for outputting a control signal for realizing a power transmission state corresponding to the determined shift position;
A shift control device comprising: changing means for changing the fixed time based on an influence on the operation of the vehicle by realizing the corresponding power transmission state.   The shift control apparatus according to claim 1, wherein the changing unit includes a unit for changing the fixed time to be longer when the influence degree is large than when the influence degree is small.   The shift control device according to claim 2, wherein the shift control device further includes a determination unit for determining the degree of influence based on a driving state of the vehicle.   The shift control device according to claim 3, wherein the determination unit includes a unit for determining the influence degree based on a speed of the vehicle.   5. The shift control device according to claim 4, wherein the determination unit includes a unit for determining that the influence degree is larger when the speed is large than when the speed is small.   The shift control device according to claim 3, wherein the determination unit includes a unit for determining the degree of influence based on a depression amount of a brake pedal of the vehicle.   The shift control device according to claim 6, wherein the determination unit includes a unit for determining that the degree of influence is larger when the stepping amount is small than when the stepping amount is large.   The shift control apparatus according to any one of claims 1 to 7, wherein the changing means includes means for changing the fixed time based on a shift position held by the driver in addition to the influence degree. .

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