JPH10110663A - Driving source starting device for car provided with automatic transmission - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a driving source starting device for a car provided with an automatic transmission which can satisfactorily keep conductivity of a contact of a switch mechanism based on starting requirement of a driving source. SOLUTION: A vehicular driving source starting device has an automatic transmission 3 connected to an engine 1 and a neutral starting switch whose contact is connected when the automatic transmission 3 is switched to a non- running range, and which connects a circuit a starter 2 for starting the engine 1. It also has a shift-lock solenoid 19 which provides the contact with external force based on starting requirement of the engine 1, a shift lever 9 and a connection member 17.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for starting a driving force source in a vehicle equipped with an automatic transmission.

[0002]

2. Description of the Related Art Generally, an automatic transmission is provided with a torque converter, a gear transmission mechanism, a friction engagement device for switching a torque transmission path, a hydraulic control device for engaging and disengaging the friction engagement device, and the like. The shift is executed by engaging and disengaging the friction engagement device based on the traveling state. Also, when the shift lever is operated, the manual valve of the hydraulic control device is operated to engage / disengage the friction engagement device, and the manual shift is executed.

On the other hand, in a vehicle equipped with an automatic transmission, since the engine and the transmission mechanism are always in a state where torque can be transmitted, in order to prevent the vehicle from starting simultaneously with starting the engine, When the automatic transmission is set in the travel range, a switch mechanism that inhibits starting of the engine by shutting off a starter circuit that starts the engine is employed.

[0004] Since this switch mechanism is required to have a function of accurately connecting / disconnecting the starter circuit in accordance with the range of the automatic transmission, a portion which can be directly connected to a member interlocking with a manual valve, specifically, an automatic switch. Often mounted on the side of the transmission.

This switch mechanism has a fixed contact and a movable contact, and the movable contact and the fixed contact are connected in conjunction with an operation of switching the automatic transmission to the non-traveling range by a shift lever, and the starter circuit is closed. The engine is ready to start. Then, the starter is driven by operating the ignition key, and the engine is started. In addition,
Japanese Patent Application Laid-Open No. Hei 7-304347 is an example of a technique for detecting a switching operation of a shift lever.

[0006]

When the vehicle is running, the operating oil temperature of the automatic transmission and the components thereof become high due to frictional heat, and the heat is applied to a switch mechanism mounted on the side of the automatic transmission. And the components of the switch mechanism thermally expand. On the other hand, when the vehicle stops and the operation of the automatic transmission stops, the operating oil temperature of the automatic transmission and the temperature of the components decrease. Then, the components of the switch mechanism thermally contract due to the above-mentioned hydraulic oil temperature and the temperature difference of the components,
The movable contact and the fixed contact relatively move relatively minutely.

As a result, the movable contact rides on foreign matters such as grease and oxide film adhered to the fixed contact, resulting in poor conductivity between the fixed contact and the movable contact. Then, even when an engine start request is made, the starter circuit is not connected, so that even if the ignition key is operated to the start position, the starter is not driven, and there is a possibility that the engine start function is reduced.

The present invention has been made in view of the above circumstances, and has a driving force source for a vehicle equipped with an automatic transmission, which can make the conduction of the contacts of a switch mechanism favorable based on a request for starting the driving force source. It is intended to provide a starting device.

[0009]

In order to achieve the above object, the present invention is directed to an automatic transmission connected to a driving force source, and an automatic transmission when the automatic transmission is switched to a non-traveling range. A driving mechanism for a vehicle equipped with an automatic transmission, comprising a switch mechanism for maintaining the driving power source in a startable state, wherein an external force is applied to a contact point of the switch mechanism based on a request for starting the driving power source. An external force applying mechanism is provided.

Here, the start request of the driving force source is such that the automatic transmission is set in the non-traveling range, a braking request is issued to the vehicle, and the ignition key for controlling the driving force source is operated in a predetermined state. Holds if Also,
Vibration and impact can be exemplified as the external force applied to the contact.

According to the first aspect of the present invention, when a request to start the driving force source is satisfied, an external force is applied to the contacts of the switch mechanism by the external force applying mechanism, and the external forces cause the contacts to move relative to each other and cause the contacts to move. Foreign matter interposed between the contacts is removed from between the contacts, and the contact surfaces of the contacts have good conductivity.

According to a second aspect of the present invention, the external force applying mechanism comprises:
A shift lever for switching a range of the automatic transmission;
A connection member that connects the shift lever and the switch mechanism; and a shift lock solenoid that regulates an operation of the shift lever for switching the automatic transmission from a non-travel range to a travel range, based on the start request. Then, the shift lock solenoid is operated to apply an external force to the shift lever, and the external force is transmitted to the contact via the connecting member.

According to the second aspect of the present invention, in addition to the same effect as the first aspect, when the start request of the driving force source is satisfied, the shift lock solenoid operates to apply an external force to the shift lever. This external force is transmitted to the contacts via the connection mechanism, and the contact surfaces of the contacts have good conductivity.

That is, since an external force can be applied to the contact by a shift lock solenoid provided in advance to restrict the switching of the shift lever of the automatic transmission, a special component is provided to apply the external force to the contact. There is no need to increase the number of parts.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 shows claim 1 of the present invention.
FIG. 2 is a diagram showing a schematic configuration of a main part of a vehicle to which claim 2 is applied. In FIG. 1, reference numeral 1 denotes an engine, and a starter 2 for starting the engine 1 is attached to a side surface of the engine 1. An automatic transmission 3 is disposed on the output side of the engine 1. The automatic transmission 3 includes a torque converter, a planetary gear mechanism, a friction engagement device for switching a torque transmission path of the planetary gear mechanism, and a friction engagement. A known structure having a hydraulic control device for engaging and disengaging the device is used. Then, hydraulic oil for lubricating / cooling the components and engaging / disengaging the friction engagement device is injected into the automatic transmission 3.

On the other hand, the automatic transmission 3 is mounted on the floor of the vehicle.
Is manually controlled to provide a shift device 4 of a floor shift type. The shift device 4 includes a shift lever plate 5, a column 6 erected on the shift lever plate 5, and an upper housing 7 fixed to an upper end of the column 6.
And a detent plate 8 erected on the shift lever plate 5 and a shift lever 9 attached to the detent plate 8.

The automatic transmission 3 is mounted on the detent plate 8.
Equipped with grooves corresponding to the L range (first speed of forward gear), 2 range (second gear of forward gear), D range, N range (neutral), R range (reverse gear), and P range (parking) Guide hole 10 is formed. Shift lever 9
Is rotatably supported by a support shaft 11 of the detent plate 8.

FIGS. 2 to 4 show the shift device 4 shown in FIG.
3 is a plan sectional view taken along line II of FIG.
Is hollow and has a substantially square planar cross section. A long hole 1 is formed in two parallel side walls of the shift lever 9.
2 is formed, and a knob button 14 is provided on the knob 13 of the shift lever 9.

The knob button 1 is provided inside the shift lever 9.
The detent rod 15 operated by the operation of No. 4 is inserted, and the detent rod 15 is urged toward the knob 13 by a spring (not shown). Detent rod 1
A grooved pin 16 penetrates and is attached to 5, and both ends of the grooved pin 16 are inserted into the elongated holes 12, respectively.

One end of the grooved pin 16 is inserted into the guide hole 10 of the detent plate 8. The upper housing 7 of the shift lever 9
One end of a connecting member 17 constituted by a cable, a link, or the like is connected to a lower part of the connecting member.

A mount 18 is formed on the shift lever plate 5, and a shift lock solenoid 19 is attached to the mount 18. The shift lock solenoid 19 includes a plunger 20 that is sucked when turned on. A flat L-shaped lock plate 21 is fixed to a tip of the plunger 20. The plunger 20
A compression spring 22 is wound around the lock plate 21, and the lock plate 21 is urged toward the shift lever 9 by the elastic force of the compression spring 22.

The detent plate 8 is provided with a stopper (not shown) which operates in conjunction with the operation of the grooved pin 16 and holds the lock plate 21 at a predetermined position. The grooved pin 16, shift lock solenoid 19, compression spring 22, lock plate 21, and plunger 20 constitute a shift lock mechanism. The shift lock mechanism is provided to prevent the shift lever 9 from being manually shifted from the P range to another range without depressing a brake pedal (not shown) when the vehicle starts moving.

On the other hand, a neutral start switch 23 is attached to a side surface of the automatic transmission 3. The neutral start switch 23 has a function of detecting a range position of the automatic transmission 3 which is switched by a manual shift operation of the shift lever 9 and a function of connecting / disconnecting a circuit of the starter 2 based on the range position of the automatic transmission 3. Have.

FIG. 5 shows a neutral start switch 23.
It is sectional drawing which shows a structure of. Neutral switch 23
Is a cover 25 fixed to the automatic transmission 3 side,
5, a case 26 attached to the surface of the cover 5, and a cover 25 and a cylindrical movable frame 27 rotatably attached to the case 26. The cover 25 is integrally formed of resin, and the case 26 is integrally formed of metal.

FIG. 6 is a plan view of the cover 25. The cover 25 has a shaft hole 28 formed therein, and the cover 25 has the L range, the 2 range, the D range, the N range, and the R range of the automatic transmission 3. , P range, and a fixed contact 30 constituting a part of the circuit of the starter 2 are arranged in an arc shape, and the fixed contacts 29, 30 are exposed on the surface of the cover 25.

On the other hand, the movable frame 27 is formed integrally with a resin, and a resin holder 31 is attached to a protruding portion 37 on the outer periphery of the movable frame 27. Recesses 32 and 33 are formed on the surface of the holder 31 on the cover 25 side,
In the recesses 32 and 33, plate-shaped movable contacts 34 and 35 corresponding to the fixed contacts 29 and 30 are separately arranged. A compression spring 36 is inserted into each of the recesses 32 and 33, and the movable contacts 34 and 35 are urged toward the cover 25 by the elastic force of the compression spring 36.

The movable contacts 34 and 35 are, as shown in FIG.
It is supported in a state substantially perpendicular to the surface of the cover 25. Further, the distal ends of the fixed contacts 29 and 30 are formed in an arc shape so that the frictional resistance between the movable contacts 34 and 35 and the cover 25 or the fixed contacts 29 and 30 is reduced. The fixed contacts 29 and 30 and the movable contact 3
Reference numerals 4 and 35 are made of a conductive material such as copper.

The movable frame 27 is provided with a shaft hole 28 of the cover 25.
, And rotatably inserted into a shaft hole 38 of the case 26, and a through hole 39 is formed substantially at the center of the movable frame 27. A shaft 40 reaching from the inside of the automatic transmission 3 to the outside is inserted into the through hole 39, and one end of the shaft 40 is connected to a manual shift valve (not shown) of a hydraulic control device provided in the automatic transmission 3. Are linked. Also, the shaft 40
A lever 41 is attached to the other end, and is fixedly fastened by a nut 42. FIG.
Are connected to each other.

Therefore, the manual shift valve is operated by operating the shift lever 9 and the shaft 40
And the movable frame 27 rotate integrally within a predetermined angle, and the movable contacts 34 and 35 move in an arc shape. Here, the range position of the shift lever 9, in other words, the range position of the automatic transmission 3 is detected by connection / disconnection between the fixed contact 29 and the movable contact 34, and the connection / connection between the fixed contact 30 and the movable contact 35 is detected.
The shutoff opens and closes the circuit of the starter 2.

Further, the case 26 is provided with a mounting hole 43 penetrating from the outer surface to the inner surface of the case 26, and a filter block 44 is mounted in the mounting hole 43.
By this filter block 44, the space between the butting surfaces of the case 26 and the cover 25, the cover 25 and the case 26
Is communicated with the outside. The shaft 3 of the movable frame 25
A sealing device 45 is provided between the cover 7 and the cover 25 and the case 26.

FIG. 8 is a block diagram showing a main control circuit configuration of a vehicle to which this embodiment is applied. An electronic control unit 46 composed of a microcomputer or the like includes a signal of the neutral start switch 23 for detecting the state of the shift lever 9 and a brake pedal (not shown).
Signal of the stop lamp switch 47 for detecting the state of
A signal from an ignition key switch 48 for detecting the state of an ignition key (not shown) is input.

Then, the electronic control unit 46 determines whether or not the start request of the engine 1 is satisfied based on the input signal, and on / off control of the shift lock solenoid 19 is executed based on the determination result. You. The circuit of the starter 2 is provided with another switch mechanism. The switch mechanism is configured such that when the stop lamp switch 47 is detected to be turned on, its contact is connected. Have been.

Here, the correspondence between the configuration of the above embodiment and the claims will be described. The engine 1 corresponds to the driving force source of the claims 1 and the neutral start switch 23 is the claims 1 and 2. The movable contact 34,
35 corresponds to the contact point of claim 1 and claim 2, wherein the shift lever 9, the connecting member 17, the shift lock solenoid 19, the plunger 20, the lock plate 21, and the compression spring 22 are the external force applying mechanism of claim 1 and claim 2. Is equivalent to

Next, the operation of each component of the above embodiment will be described with reference to the time chart of FIG. First, when the stop lamp switch 47 is turned off and the ignition switch 48 is turned off with the shift lever 9 set to the P range, the start request of the engine 1 is not satisfied.

In this state, the grooved pin 16 of the shift lever 9 is stopped at a position corresponding to the P range of the guide hole 10. Also, the shift lock solenoid 19 is turned off, and the lock plate 21 is urged toward the shift lever 9 by the elastic force of the compression spring 22 as shown in FIG. Therefore, the operation of switching the position of the shift lever 9 to a position other than the P range by operating the knob button 14 is prohibited by the shift lock mechanism.

When the shift lever 9 is set to the P range, the fixed contact 30 and the movable contact 35 which constitute a part of the circuit of the starter 2 are connected, but are connected by depressing the brake pedal. Since the contacts of the switch mechanism are open, the circuit of the starter 2 is maintained as a whole in an interrupted state. For this reason, even if the ignition key is operated to the start position, the starter 2 is not driven, and the engine 1 is kept stopped.

Next, with the shift lever 9 set to the P range, the ignition switch 48 is turned on.
In addition, when the stop lamp switch 47 is turned on, the start request of the engine 1 is satisfied. When the start request of the engine 1 is satisfied, the electronic control unit 46 repeats the on / off control of the shift lock solenoid 19 a plurality of times, and thereafter, the electronic control unit 46 is maintained in the on state. This control is performed until the ignition key is operated to the start position. In this embodiment, the control for turning on the shift lock solenoid 19 twice in 400 ms is performed.

When the shift lock solenoid 19 is turned on, the plunger 20 is sucked as shown in FIG. Then, the lock plate 21 moves toward the shift lock solenoid 19 against the elastic force of the compression spring 22, the lock plate 21 moves to a position where the movement restriction of the grooved pin 16 is released, and the shift lock mechanism is released.
When the shift lock solenoid 19 is turned off, the plunger 20 and the lock plate 21 move to the position shown in FIG.

As described above, the shift lock solenoid 1
When 9 is switched from the state of FIG. 3 to the state of FIG.
The lock plate 21 is pressed against the shift lever 9 by the elastic force of the compression spring 22, and an external force, in other words, an impact is applied to the shift lever 9. This impact is applied to the connecting member 1
7, transmitted to the holder 31 via the lever 41, the shaft 40, and the movable frame 27, and further transmitted to the movable contacts 34, 35, so that the movable contacts 34, 35 and the fixed contact 30 relatively move.

Here, if a foreign substance such as an oxide film or grease is present between the contact surface between the fixed contact 30 for connecting / disconnecting the circuit of the starter 2 and the movable contact 35, the movable contact 35 is fixed. Due to the relative movement with respect to the contact 30, foreign matter is removed from between the contact surfaces between the movable contact 35 and the fixed contact 30, the surface is activated, and the conductivity between the movable contact 35 and the fixed contact group 30 becomes good. .

Thereafter, when the ignition key is operated to the start position, the starter 2 is driven to drive the engine 1.
Starts. Further, as described above, since the shift lock plate 21 is moved to the position shown in FIG. 3 and the shift lock mechanism is released, when the knob button 14 is operated, the grooved pin 16 operates in the elongated hole 12 and the provided pin 16 is guided by the guide. If the shift lever 9 is rotated by a predetermined angle about the support shaft 11 to escape from the position corresponding to the P range of the hole 10, the shift lever 9 can be switched to a position other than the P range as shown in FIG. .

When the shift lever 9 is switched to a position other than the P range, the shift lock solenoid 19 is turned off. However, the lock plate 21 is moved by the stopper (not shown) attached to the detent plate 8 as shown in FIG.
Is held at the intermediate position shown in FIG. The intermediate position indicates a state where the lock plate 21 is located at an intermediate position between the position in FIG. 2 and the position in FIG. When the lock plate 21 is at the intermediate position, the grooved pin 16 is
Movement is allowed between a position corresponding to the 0 P range and a position other than the P range. This intermediate position is set in order to prevent the heat generation by maintaining the shift lock solenoid 19 in the off state.

After the shift lever 9 is switched to a position other than the P range, the brake pedal is released and the stop lamp switch 47 is turned off to allow the vehicle to run. After that, when the shift lever 9 is switched to the P range, the holding of the lock pin 21 by the stopper is released, and the lock plate 21 moves to the position of FIG. 2 again.

As described above, according to this embodiment, the shift lever 9 is set to the P range, the stop lamp switch 47 is turned on, and the ignition switch 48 is turned on, so that the start request of the engine 1 is satisfied. In this case, a shock is applied to the shift lever 9 by the ON / OFF control of the shift solenoid 19, and the shock is transmitted to the movable contact 35 via the connecting member 17.

When the vehicle is running, the operating oil temperature and the components of the automatic transmission 3 become high due to frictional heat, and the heat is transmitted to the neutral start switch 23 mounted on the side of the automatic transmission 3. As a result, the components expand thermally. On the other hand, when the vehicle stops and the operation of the automatic transmission 3 stops, the operating oil temperature of the automatic transmission 3 and the temperature of the components decrease.

Then, the components of the neutral start switch 23 are thermally contracted due to the above-mentioned hydraulic oil temperature and the temperature difference between the components, and the movable contact 35 and the fixed contact 30 relatively slightly move, and adhere to the fixed contact 30. The movable contact 35 rides on foreign matter such as grease or oxide film, and the fixed contact 30
There is a possibility that the continuity between the contact and the movable contact 35 is defective.

However, in this embodiment, the movable contact 35
By the relative movement between the movable contact 35 and the fixed contact 30, foreign matter interposed between the contact surfaces of the movable contact 35 and the fixed contact 30 is removed, and the conductivity between the movable contact 35 and the fixed contact 30 is maintained well. . Therefore, when the ignition key is operated to the start position, the starter 2 is driven and the engine 1 is started, and the starting function of the starting device is improved.

Further, in this embodiment, since a structure is employed in which a shock is applied to the movable contact 35 by on / off control of the shift lock solenoid 19 for the shift lock mechanism, it is necessary to apply a shock to the movable contact 35. There is no need to provide special components, and an increase in the number of components can be suppressed.

Further, in the above-described embodiment, even when the temperature of the hydraulic oil of the automatic transmission 3 or the temperature of the component parts increases during running of the vehicle, the neutral start switch 2
Since the inside and outside of the movable contact 3 are communicated by the filter block 44, the fixed contacts 29, 30 and the movable contact 3,
The temperature rise and expansion of the air around 4, 35 are suppressed. Therefore, expansion of the components is suppressed as much as possible,
The shut-off function can be favorably maintained.

In the embodiment, an actuator such as a solenoid or a hydraulic cylinder is separately provided irrespective of the shift lock mechanism in order to give an impact to the movable contact 35.
It is also possible to adopt a configuration in which an impact is directly applied to the shaft 40 and the movable frame 27 by the operation of the actuator, and the impact is transmitted to the movable contact 35. It is also possible to make the external force applied to the movable contact 35 an alternating load and vibrate the movable contact 35 with a predetermined amplitude. When an alternating load is applied to the movable contact 35, the number of relative movements between the movable contact 35 and the fixed contact 30 increases and the relative movement direction changes alternately, so that the foreign matter removing function is further improved.

The above embodiment is also applicable to a column shift type shift lever. Further, the present invention can be applied to a vehicle using an electric motor as a driving force source. Further, when the start request of the engine 1 is satisfied in the state where the range is set to the N range, it is possible to perform control for applying an external force to the contact point of the switch mechanism.

[0052]

As described above, according to the first aspect of the present invention,
When the start request of the driving force source is satisfied, the external force is applied to the contacts of the switch mechanism by the external force applying mechanism, and the contacts relatively move. It is removed from between the contact surfaces, and the conductivity of the contacts becomes good. Therefore, the driving force source is reliably maintained in a startable state, and the starting function is improved.

According to the second aspect of the invention, the same effects as those of the first aspect can be obtained. In addition, when the request for starting the driving force source is satisfied, the shift lock solenoid operates to apply an external force to the shift lever. This external force is transmitted to the contacts via the connection mechanism, and the contact between the contact surfaces is in a good state. That is, an external force can be applied to the contact point by the shift lock solenoid provided in advance to restrict the switching of the shift lever of the automatic transmission.
It is not necessary to provide a special component to apply an external force to the contact, and it is possible to suppress an increase in the number of components.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram showing a relationship between an engine and an automatic transmission applied to an embodiment of the present invention and a shift device.

FIG. 2 is a plan sectional view of the shift lever device shown in FIG. 1 taken along the line II.

FIG. 3 is a plan sectional view taken along line II of the shift lever device shown in FIG. 1;

FIG. 4 is a plan sectional view taken along line II of the shift lever device shown in FIG. 1;

FIG. 5 is a sectional view showing a configuration of a neutral start switch used in the embodiment of the present invention.

FIG. 6 is a plan view showing a configuration of a cover used in the neutral start switch of FIG.

FIG. 7 is a partial side sectional view showing a fixed contact and a movable contact used in the neutral start switch of FIG.

FIG. 8 is a block diagram showing a main control circuit configuration used in the embodiment of the present invention.

FIG. 9 is a time chart showing operation states of components used in the embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Engine 3 Automatic transmission 9 Shift lever 17 Connecting member 19 Shift lock solenoid 20 Plunger 21 Lock plate 22 Compression spring 23 Neutral start switch 29, 30 Fixed contact 34, 35 Movable contact

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code FI F02D 29/02 321 F02D 29/02 321B

Claims (2)

[Claims] 1. An automatic transmission, comprising: an automatic transmission connected to a driving force source; and a switch mechanism for maintaining the driving force source in a startable state when the automatic transmission is switched to a non-traveling range. A driving force source starting device for a vehicle equipped with a transmission, comprising: an external force applying mechanism for applying an external force to a contact point of the switch mechanism based on a request for starting the driving force source. Source starter. 2. A shift lever for switching a range of the automatic transmission, a connecting member connecting the shift lever and the switch mechanism, and an external force applying mechanism for shifting the automatic transmission from a non-travel range to a travel range. A shift lock solenoid for restricting the operation of the shift lever for switching, wherein the shift lock solenoid is operated based on the start request to apply an external force to the shift lever, and the external force is applied via the connecting member. The driving force source starting device for an automatic transmission-equipped vehicle according to claim 1, wherein the driving force is transmitted to the contact point.