JPH04278832A - Drive state displaying device - Google Patents

Abstract

PURPOSE:To dissolve the impression of deflection in the drive feeling due to the time lag between the shift setting and the actual drive state setting in a transfer by displaying the state which is selectively set in actuality in the trans fer for the shift operation of a transfer lever, in order to display the set of the drive state of a four-wheel drive vehicle. CONSTITUTION:A sensor which is operated according to the shift position of a transfer lever is installed, and indicator lamps for front wheel, rear wheel and center differential gear are put-ON-controlled selectively or at the same time, according to the signal supplied from the sensor, and a control part for flashing-displaying the indicator lamps during the period selecting a drive state is installed.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drive status display device, and more particularly to a device for displaying four-wheel drive and two-wheel drive settings.

0002

[Prior Art] Among so-called four-wheel drive vehicles, there are so-called part-time four-wheel drive vehicles that have a structure in which four-wheel drive can be set from a two-wheel drive state by a driver's selection operation. There is. On the other hand, since the driving method setting described above is selected by the driver depending on the driving conditions, it is necessary to display the current driving method to the driver. Therefore, in the past, for example, "4WD" or "2WD" was displayed on the instrument panel based on information from the drive system selector switch installed on the driver's seat side or the position sensor attached to the select lever. In some cases, a designated lamp may be lit, or any or all of the wheels of a symbol mark with the image of four wheels may be lit.

0003

[Problems to be Solved by the Invention] In the above-mentioned drive system, when the vehicle is in a four-wheel drive state, for example, in order to avoid tight braking, the drive to the front wheels and the rear wheels may be controlled in a continuous manner. For this reason, a center differential lock mechanism is sometimes attached to a two-wheel/four-wheel switching mechanism, a so-called transfer, provided in the power train from the engine.

Therefore, as mentioned above, in a drive system equipped with a center differential lock mechanism in addition to a transfer, in addition to the above-mentioned 2-wheel/4-wheel switching, the center differential mechanism can be switched depending on the connection state and driving conditions. If the vehicle is equipped with a transmission mechanism that changes the torque by switching the rotation from the engine between high and low speeds, it is necessary to inform the driver of these settings so that he can perform appropriate driving operations. .

However, in conventional display devices, setting operation sections for each of the above-mentioned switching mechanisms, so-called
Since the display lights up based on the switching operation of the changeover switch or select lever, the changeover from 2-wheel drive to 4-wheel drive is actually completed within the transfer. Even when the switching operation is not completed or other switching operations are not completed, the display section continues to display the operating setting state, and the driver may feel a difference in the actual driving sensation.

SUMMARY OF THE INVENTION In view of the above-mentioned problems with the conventional drive state display device, an object of the present invention is to improve the sense of driving by making it possible to display the state until the switching state set by the operation is actually completed. To provide a drive state display device that can eliminate the problem of feeling misalignment.

[0007]

[Means for Solving the Problems] In order to achieve this object, the present invention provides an input shaft receiving power from an engine, a transmission mechanism for changing the rotation of the input shaft between high and low speeds, and the transmission mechanism. an output shaft that is rotatably driven through the output shaft, a rear wheel side input shaft that receives power from the output shaft and transmits it to the rear wheel shaft, an intermediate shaft that transmits the power from the output shaft to the front wheel side, and the intermediate shaft that transmits the power from the output shaft to the front wheel side. A front wheel side input shaft is connected to the shaft via a synchromesh mechanism and receives power from the intermediate shaft and transmits it to the front wheels, and is interposed between the output shaft and the intermediate shaft. 2 with center differential with center differential
In a four-wheel drive vehicle having a speed transfer, a shift rail is provided in the movement path of a shift rail for operating the transfer, and is located at a position corresponding to a shift pattern set for the shift rail. The center differential lock operation detection sensor, the four-wheel drive operation detection sensor, the high speed/low speed detection sensor, and the free wheel hub detection sensor that detects the coupling state of the freewheel hub are executed when the four-wheel drive state is set by the above-mentioned transfer. The wheel combination detection sensor and each of the above sensors are connected to the input side, and the output side is
and a control unit to which indicator lamps indicating the front and rear wheels and indicator lamps indicating a center differential are respectively connected, and the control unit controls each indicator lamp according to selective input from each of the sensors. Lighting mode
The mode is set, and the lighting mode is set by inputting the drive state obtained by the shift rail movement setting from the sensor at the position corresponding to that state, and two-wheel drive and four-wheel drive are set. Each indicator blinks during the operation period of the actuator until the freewheel hub is engaged and uncoupled for setting, and during the operation period of the actuator between differential lock and differential lock release. .

[0008]

[Operation] According to the present invention, when the drive state is set by operating the shift rail, until the operation of the actuator that operates based on this setting is completed, the setting is made by the flashing display of the indicator lamp. When the operation of the actuator is completed, the driving state is displayed by lighting an indicator lamp in accordance with the operation of the shift rail.

[0009]

[Embodiment] Details of an embodiment of the present invention will be explained below with reference to FIGS. 1 to 9. FIG. 1 is a model diagram showing a two-speed transfer with a center differential to which a drive status display device according to an embodiment of the present invention is applied, and the structure will be described below. That is, in FIG. 1, the transfer 1 includes a transmission mechanism (H/L switching mechanism) 4 that switches the rotational speed of an input shaft 3, which rotates in response to power from an engine 2, between high and low speeds, and a transmission mechanism 4. An output shaft (main shaft) 5 is provided on an extension of the input shaft 3 in order to transmit power to the rear wheels through the main shaft, and an output shaft (main shaft) 5 is attached to the tip of the output shaft 5 to appropriately transmit power from the output shaft 5 to the front wheels. A center differential 6 that distributes and transmits power to the rear wheels, a rear wheel side input shaft 7 that receives power from the output shaft 5 and transmits this power to the rear wheels, and an intermediate shaft 8 that receives power from the output shaft 5. , a front wheel side input shaft 9 that receives power from the output shaft 5 via an intermediate shaft 8 and transmits it to the front wheels, and a center differential on/off mechanism 10 that switches the center differential 6 between a free state and a locked state. ,
It is comprised of a 2WD/4WD switching mechanism (2WD/4WD switching mechanism) 11 that transmits or cuts off the power of the output shaft 5 to the front wheel input shaft 9 to switch between a 2-wheel drive state and a 4-wheel drive state. In addition, in the figure, the reference numeral 7A indicates a viscous coupling that constitutes an operation limiting mechanism.

Further, the above-mentioned front wheel input shaft 9 is set in an interlocking relationship with a front wheel drive shaft 13 via a transfer chain 12, and a front wheel differential is connected to the tip of the front wheel drive shaft. 14 is arranged, and a freewheel hub clutch mechanism 15 is provided on one side of the output shaft 14A of this front wheel side differential 14. It is designed to switch between transmitting or cutting off power. The above-mentioned transmission mechanism 4, as shown in FIG. 2 showing its details, includes an input shaft side gear 4A and an input shaft side hub 4B that are mounted in series on the end of the input shaft 3 so as to rotate integrally with the input shaft 3. , an output shaft side hub 4C mounted at the end of the output shaft 5 so as to rotate integrally with the output shaft 5;
A transmission hub 4E and a transmission gear 4F are mounted in series to rotate integrally with a cylindrical shaft 4D provided on the outer periphery of the output shaft 5, and are arranged in parallel to the input shaft 3 and output shaft 5. A low speed first gear 4H supported by a certain counter shaft 4G and meshing with an input shaft side gear 4A, a low speed second gear 4I supported by a counter shaft 4G and meshing with a transmission gear 4F, an input shaft side hub 4B, and It is located on the outer periphery of the output shaft side hub 4C and the transmission hub 4E, is movable in the direction in which these hubs are arranged side by side, and is composed of a transmission switching sleeve 4J that can engage with each of these hubs as appropriate. There is.

The shift switching sleeve 4J in the transmission mechanism 4 can be moved between a high speed position (H position), a neutral position (N position) and a low speed position ( When set to the high speed position, the input shaft side hub 4B and the output shaft side hub 4C engage with the gear changeover sleeve 4J. As a result, the speed change hub 4E becomes free, and when the speed change switching sleeve 4J is set to the neutral position, this sleeve becomes free.
Only the output shaft side hub 4E is engaged with the hub 4J, and the input shaft side and output shaft side hubs 4B and 4C are in a free state. Furthermore, when the sleeve 4J is set to the low speed position, the output shaft side hub 4E is connected to the sleeve 4J.
and the transmission hub 4C are engaged with each other, and the input shaft side hub 4B is left free.

On the other hand, center differential on/off switching mechanism 10
The differential lock hub (output shaft side hub) 10A is attached to the output shaft 5 as a first hub, and the intermediate hub (2WD/4WD) is attached to the front end of the intermediate shaft 8 and forms a second hub.
It consists of a hub) 10B and a center differential switching sleeve (2WD/4WD sleeve) 10C disposed around the outer periphery of these hubs.

Furthermore, the 2WD/4WD switching mechanism 11 has a structure in which the sleeve 10C in the above-mentioned center differential ON switching mechanism 10 is also used, and the intermediate hub 1
0B and the third one attached to the front end of the front wheel side input shaft 9.
A front wheel hub (front drive sprocket clutch gear) 11A as a hub of the center differential on/off switching mechanism 10, which is located on the outer periphery of the intermediate hub 10B and the front wheel hub 11A and can be engaged with each hub as appropriate. It is composed of a sleeve 10C which also serves as the sleeve 10C. A synchromesh mechanism 11B is arranged between the intermediate hub 10B and the front wheel hub 11A.

The above-mentioned center differential on/off switching three
The inner peripheral surface of the sleeve (2WD/4WD sleeve) 10C is formed with a first tooth surface 10C1 at the front and a second tooth surface 10C2 at the rear. 10C1
meshes with the differential lock hub 10A, and the second tooth surface 10C2 meshes with the intermediate hub 10B and the front wheel hub 11A. A groove portion 10C3 is formed between the first and second tooth surfaces 10C1 and 10C2, which do not come into contact with the hubs 10A, 10B and 11A.

[0015] Furthermore, the center differential on/off switching sleeve (2WD/4WD sleeve) 10C described above is used to switch the differential on/off as described later when the shift switching sleeve 4J is in the high speed position (H position). It is driven by a shift fork 17A that switches between two wheels and four wheels, and shifts between the high-speed 2-wheel drive position of center differential lock (2H position), the high-speed 4-wheel drive position of center differential free (4H center differential free position, that is, 4H position), and the center differential lock high-speed 2-wheel drive position (2H position), -The high-speed 4-wheel drive position of the differential lock (4H center differential lock position, i.e. 4HLc position) is possible, and the gear shift switching sleeve 4J
When the vehicle is in the low speed position (L position), a low speed four-wheel drive position of the center differential lock (4L center differential lock position, ie, 4LLc position) can be taken. Therefore, when the above-mentioned 2WD/4WD sleeve 10C is in the two-wheel drive position, the 2WD/4WD sleeve 10C
The differential lock hub 10A and intermediate hub 10B are engaged with the second tooth surface 10C2 of C, while the front wheel hub 11A is free, and the 2WD/4WD sleeve 10C is in the 4-wheel drive position (4H position). and 2WD/4WD three
The intermediate hub 10B and the front wheel side hub 11A mesh with the second tooth surface 10C2 of the hub 10C, and the differential lock hub 10A becomes free. Further, when the 2WD/4WD sleeve 10C is in the 4H differential lock position, the intermediate hub 10B and the front wheel side 11A mesh with the second tooth surface 10C2 of the 2WD/4WD sleeve 10C. In addition, even when the above-mentioned 2WD/4WD sleeve 10C is in the differential lock position in a state where the shift sleeve 4J is switched to the low speed side, the 2WD/4WD sleeve 10C
The intermediate hub 10B and the front wheel side 11A are attached to the second tooth surface 10C2 of the
The two are designed to mesh together.

On the other hand, a shift fork (2W
As shown in Fig. 3, the transfer shift pattern via the D/4WD shift fork is 2H (high-speed 2-wheel drive), 4H (high-speed 4-wheel drive differential free position), 4HLc.
(high-speed differential lock position), N (neutral position) and 4LL
c (low-speed differential lock position) can be selected. Shift sleeve 4J and 2WD/4WD sleeve 10C according to the shift pattern described above.
A shift rail (H/L shift rail) 18 and a 2WD/4WD shift rail (2/4 shift rail) 19 for driving the vehicle have a structure shown in FIG. That is, the H/L shift rail 18 and the 2/4 shift rail 19 are provided with H/L lugs 18A and 2/4 lugs 19A, respectively, and each of these lugs 18A and 19A is provided with a transfer transfer rail (not shown). - Grooves 18B and 19B into which the lower end of the lever fits are formed, respectively. Further, the H/L shift rail 18 and the 2/4 shift rail 19 are connected to the H/L shift fork 17, respectively.
Equipped with B and 2/4 shift fork 17A, H
/L shift rail 18 advances and retreats in three stages in the axial direction,
The LLc (low-speed 4-wheel drive differential lock) position, N (neutral) position, and 4HLc (high-speed 4-wheel drive differential lock) position can be changed, and the 2/4 shift rail 1
9 can move forward and backward in two stages in the axial direction, and can be displaced to a 4H (high-speed four-wheel drive differential free) position and a 2H (high-speed two-wheel drive) position. Note that the lower end of the transfer lever is located between the groove 16B of the H/L lug 18A of the H/L shift rail 18 and the 2/4 shift rail 19 in the 4H (high-speed four-wheel drive differential free) state. Therefore, when operating the H/L shift rail 18 side, the lower end of the transfer lever can move between the grooves 19B of the 4 lug 19A and the 2/4 shift rail. The lower end of the transfer lever is in the 4 drive position.
/4 When operating the shift rail 19 side, H/L
The shift rail 18 is fixed at the H position.

On the other hand, the above-mentioned H/L shift rail 19 and 2/4 shift rail 19 are provided with a moderation mechanism for restraining the rails at each shift position with a constant force. be. In other words, the moderation mechanism described above is
It is composed of a recess formed on the circumferential surface of each rail and a ball latch 20 that can be engaged with the recess.

[0018] A plurality of these moderation mechanisms, in other words, a moderation mechanism that restrains the rail at a stage corresponding to each of the above-mentioned shift positions, has a ball engaged with a recess. A sensor is provided to detect the actual displacement. That is, this sensor is for detecting the shift position of the transfer lever, and the sensors include a center differential lock detection switch 21, a center differential lock operation detection switch 22, and a four-wheel drive operation detection switch 23.
and an H/L detection switch 24, and other sensors include the freewheel hub clutch mechanism 1.
A freewheel engagement switch 25 attached to 5 is provided for detecting engagement.

In each of the above-mentioned switches, the center differential lock detection switch 21 is connected to the 2/4 shift fork 1.
The center differential lock operation detection switch 22 is turned on when the center differential is locked in 4-wheel drive due to the position 7A, and the center differential lock operation detection switch 22 is turned on when the transfer lever is shifted to the position where the center differential should be locked. 19
The four-wheel drive operation detection switch 23 detects the position of the shift rail when the transfer lever is shifted to set the four-wheel drive state. Furthermore, the H/L detection switch 24 detects the high or low state of the transfer gear ratio depending on the position of the H/L shift rail 18, and is turned on when the gear ratio is high or low. The freewheel engagement switch 25 is set to turn off when the freewheel hub clutch 15 detects the position of the shift fork and engages and locks. has been done. In addition to the above-mentioned sensor, when the 2/4 shift rail 19 of the shift rails is in the 2-wheel drive position, the free-wheel hub clutch mechanism 15 is maintained in an inoperative state, and the free-wheel hub clutch mechanism 15 is maintained in an inactive state, actuator when switched to
The freewheel hub clutch mechanism 1 is activated by operating the motor 16.
A 2WD/4WD detection switch 16A is provided for causing the front wheel drive shaft 5 to rotate integrally with the front wheel input shaft 9.

Each of these switches is connected to a control section 26, which will be described later. That is, the control unit 26
In FIG. 5, the main part is a control unit 26 that includes a logic circuit, for example, and this control unit 26A has the above-mentioned differential lock detection switch 21 and center differential lock operation detection switch 23 connected to the power supply. , four-wheel drive operation detection switch 23 and H/
The L detection switch 24 and the freewheel engagement switch 25 are connected in parallel, and between the control unit 26A and the ground side is the instrument panel on the driver's seat side shown in FIG. The indicator lamps 27A, 27B, and 27C of the provided driving state display indicator 27 are connected in parallel.

The above-mentioned driving state display indicator 27
As shown in FIG. 7, it is equipped with a front wheel illumination indicator lamp 27A, a rear wheel illumination indicator lamp 27B, and a center differential illumination indicator lamp 27C located between these wheels. −
The control unit 26 in which the taramps are independently or mutually
The lighting is controlled by the lighting drive.

That is, when a signal from each switch is input to the control section 26, a driving current is applied to each indicator lamp according to the lighting mode shown in FIG. 8 according to the type of the signal. It has become. Then, the control section 2
6, as shown in FIG.
In addition to controlling the lighting of each indicator lamp according to the type of signal from the switch when either of the shift rails 18, 19 is displaced to the shift position by operation of If a shift position is selected where a mechanism that requires time to engage, such as a mesh mechanism or freewheel hub clutch, is selected, the indicator lamp will be controlled to flash until the engagement is completed. ing. In other words,
The flashing control is performed until the above-mentioned engagement is completed, when switching from 2-wheel drive state to 4-wheel drive state, and when switching on/off differential lock and 2/4 sleeve. 10C (see FIG. 2), and when the free-wheel hub clutch 15 (see FIG. 1) is engaged and disengaged. In this embodiment, it is assumed that rear wheel drive is set when the vehicle is in the 2WD position (2H position).

[0023] Since this embodiment has the above configuration,
The lighting state of each indicator lamp will be explained as follows with reference to FIGS. 8 and 9. That is, first,
In the two-wheel drive state, the four-wheel drive operation detection switch 23
is off, 2WD/4WD detection switch 1
6A is in the on state, and thereby the freewheel engagement switch 25 is in the off state, when the H/L detection switch 24 is on, the attitude of the center differential lock on/off mechanism 10 is changed. Regardless, as shown in FIG. 9(A), only the rear wheel illumination indicator lamp 27B is lit. In FIG. 9, the indicator lamps shown with diagonal lines mean that they are in the lighting state, and the indicator lamps with radiation added in addition to the diagonal lines indicate that they are in the blinking state. Let me preface this by saying that if there is no line displayed, it means that the light is off.

On the other hand, when the transfer lever is shifted from the above-mentioned two-wheel drive state to the 4H (high-speed four-wheel drive differential free) position, 2/4 of the shift rails
9 is displaced, the four-wheel drive activation switch 23 is turned on, and the 2WD/4WD detection switch 16A is turned on, thereby actuating the actuator 16 and causing the freewheel hub clutch 15 to start engaging. Therefore, at this point, since the freewheel engagement switch 25 has not yet been turned on, the above-mentioned four-wheel drive activation switch 25 is not turned on.
3 until the freewheel engagement switch 25 is turned on, in other words, until the freewheel hub can rotate integrally with the input shaft 9 on the front wheel side. The wheel illumination indicator lamp 27B is on, and the front wheel illumination indicator lamp 27A is on.
is made to blink as shown in FIG. 9(B). Then, when the above-mentioned freewheel engagement switch 25 is turned on, as shown in FIG. 9(C), the front wheel illumination indicator lamp 27A also lights up in the same way as the rear wheel illumination indicator lamp 27B. Switch.

Furthermore, if the transfer lever is shifted to the 4HLc (high-speed four-wheel drive differential lock) position when the transfer lever is in the 4H position, the four-wheel drive activation switch 23 is turned on and the free wheel engine is activated. -Jiswitch 25
is on, and center differential lock operation detection switch 2
2 is turned on, 2WD/4WD sleeve 10
Until the engagement due to the movement of C is completed, in other words, until the center differential lock detection switch 21 is turned on, the center differential illumination indicator lamp 27C is blinked as shown in FIG. 9(D), When the engagement of the center differential on/off sleeve 10C is completed, the center differential lock detection switch 21 is turned on, and as shown in FIG. 9(E)
As shown in , the center differential illumination indicator lamp 27C is switched to the lit state. Thereafter, as shown in FIGS. 9(F) and (G), the transfer lever is shifted to the N (neutral) position and the 4LLc (low-speed four-wheel drive differential lock) position is shifted to the N (neutral) position and the 4LLc (low-speed four-wheel drive differential lock) position by operating the switch according to the shift position and this displacement. Accordingly, the lighting state of each indicator lamp is controlled.

[Effects of the Invention] As described above, according to the present invention, the transfer
Switching between 2-wheel drive and 4-wheel drive by shifting the lever,
When displaying center differential lock or differential lock release, or high/low speed switching, the position of the shift lever is detected by shifting the transfer lever, and the state set by the shift position is detected. Since the display state is controlled, it is possible to properly display the display until the actual drive state is obtained and at the time the actual drive state is obtained, making it easier to select the drive state during driving operation. It is possible to prevent a problem such as a discrepancy between the driving feeling and the driving feeling obtained from the actual driving state setting.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing the structure of a transfer to which a drive state display device according to an embodiment of the present invention is applied.

FIG. 2 is a schematic diagram showing the configuration of main parts of the transfer shown in FIG. 1;

FIG. 3 is a model diagram showing a shift pattern used in the transfer shown in FIG. 1;

FIG. 4 is a model diagram for explaining the structure of a shift rail used in the transfer shown in FIG. 1 and the positional relationship of sensors.

FIG. 5 is a circuit diagram showing a control section forming a main part of the driving state display device according to the embodiment of the present invention.

FIG. 6 is an external view showing a portion provided with a display section used in the main portion shown in FIG. 5;

7 is an enlarged view of the portion indicated by the symbol ■ in FIG. 6. FIG.

8 is a mode diagram for explaining the operation of the control section shown in FIG. 5. FIG.

9 is a schematic diagram for explaining an actual display state according to the mode shown in FIG. 8. FIG.

[Explanation of symbols]

1 Transfer 2 Engine 3 Input shaft 4 Transmission mechanism 5 Output shaft 6 Center differential 7 Rear wheel input shaft 8 Intermediate shaft 9 Front wheel input shaft 10 Center differential input switching mechanism 11
2WD/4WD switching mechanism 18 H/L shift rail 19 2/4 shift rail 21 Differential lock detection switch 22 Differential lock operation detection switch 23
Four-wheel drive operation detection switch 24 H/L detection switch 25 Freewheel engagement switch 26
Control unit 27 Display indicator 27A Front wheel lighting indicator 27B Rear wheel lighting indicator

Claims (1)

[Claims] Claim 1: an input shaft that receives power from an engine, a transmission mechanism that changes the rotation of the input shaft between high and low speeds, an output shaft that is rotatably driven via the transmission mechanism, and an output shaft that rotates from the output shaft. a rear wheel input shaft that receives power from the output shaft and transmits it to the rear wheel shaft; an intermediate shaft that transmits power from the output shaft to the front wheels; and an intermediate shaft that is connected to the intermediate shaft via a synchromesh mechanism. 2 with a center differential, comprising a front wheel side input shaft that receives power from the input shaft and transmits it to the front wheels, and a center differential interposed between the output shaft and the intermediate shaft.
In a four-wheel drive vehicle having a speed transfer, a shift rail is provided in the movement path of a shift rail for operating the transfer, and is located at a position corresponding to a shift pattern set for the shift rail. The center differential lock operation detection sensor, the four-wheel drive operation detection sensor, the high speed/low speed detection sensor, and the free wheel hub detection sensor that detects the coupling state of the freewheel hub are executed when the four-wheel drive state is set by the above-mentioned transfer. The wheel combination detection sensor and each of the above sensors are connected to the input side, and the output side is
and a control unit to which indicator lamps indicating the front and rear wheels and indicator lamps indicating a center differential are respectively connected, and the control unit controls each indicator lamp according to selective input from each of the sensors. Lighting mode
The mode is set, and the lighting mode is set by inputting the drive state obtained by the shift rail movement setting from the sensor at the position corresponding to that state, and two-wheel drive and four-wheel drive are set. Each indicator is made to blink during the actuator operation period until the freewheel hub is coupled and uncoupled, and during the actuator operation period between differential lock and differential lock release. Drive status display device.