JPH0729566B2 - Vehicle start control device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle start control device equipped with an automatic transmission, and more particularly, to a device that prevents unintentional sudden start at the time of start.

(Prior Art) The ratio of vehicles equipped with an automatic transmission (hereinafter referred to as A / T) to all vehicles tends to increase due to approximation and ease of driving. The A / T is characterized by eliminating the need for clutch operation. Therefore, by operating either the accelerator pedal or the brake pedal, normal operation makes it extremely easy to perform basic vehicle behavior such as acceleration and braking. You can control. On the other hand, if the A / T control lever is operated from the non-running range to the running range by accidentally depressing the accelerator pedal at the time of starting, there is a risk of sudden start, so various erroneous operation prevention mechanisms have been devised and put into practical use.

FIG. 8 and FIG. 9 are diagrams showing a typical conventional example thereof. In FIGS. 8 and 9, a button 3 is provided on the handle 2 attached to the head of the control lever 1 of the A / T, and when the button 3 is pushed in the direction of the arrow in the figure, the inside of the shaft of the control lever 1 is pushed. The rod 4 that penetrates the
It is designed to be displaced in the direction. A pin 6 is attached to the tip of the rod 4, and the pin 6 extends to a cutout portion 8a of the position plate 8 through a long hole 7a of a yoke 7 holding the control lever 1. The position plate 8 is fixed to the floor surface 5 together with the lock plates 9 arranged side by side, and the yoke 7 is rotatably supported by a pivot shaft 10 arranged between the position plate 8 and the lock plate 9. There is. Select lever 11 on yoke 7
Are integrally attached, and the tip of the select lever 11 is connected to a manual valve (not shown) of the A / T via a select rod 12.

Now, when the control lever 1 is in the parking position (hereinafter referred to as the P position) as shown in FIG. 9, even if the control lever 1 is tilted to move to a position other than the P position, the pin 6 is recessed in the cutout 8a. Is not allowed to tilt. That is, when tilting is intended, the driver needs to push the button 3 of the handle 2 to displace the pin 6, and the tilting operation of the control lever 1 is performed based on a clear intention. Therefore, P
It is possible to avoid selecting from one position to another, improving safety when starting.

However, since the erroneous operation preventing mechanism does not consider the pedal operation at all, the tilting of the control lever 1 is allowed even if the button 3 is pressed even if the accelerator pedal is depressed. In particular,
When the accelerator pedal is depressed at the P position, even if the depression amount is small, the load on the engine is small, and therefore the engine starts high-speed operation extremely easily. Therefore, if the vehicle is suddenly selected from the high rotation state to the reverse position (hereinafter, R position) or the forward position (hereinafter, D, II, I position), the vehicle may suddenly start.

10 and 11 are views showing a conventional erroneous operation preventing mechanism in consideration of the erroneous operation of the pedal.

In FIGS. 10 and 11, a mechanism similar to that shown in FIGS. 8 and 9 is provided for the A / T shift lever 13, the lock plate 15 for supporting the shift lever 13 on the vehicle body floor surface 14, and the like. It is equipped. Further, in addition to this, a mechanism is added to prohibit the displacement of the pin 16 that prohibits the tilting of the shift lever 13 under a predetermined condition. That is, the shift lever
When 13 is in the P position, the pin 16 is confined in the notch 15a of the lock plate 15 by the movable plate 17, and the movable plate 17 receives the biasing force of the spring 18 and stays at the position shown by the solid line in the figure. There is. Therefore, since the displacement of the pin 16 is not allowed, the shift lever 13 cannot be tilted.

The movable plate 17 is connected to the brake pedal BT via a wire 19, and when the brake pedal BT is stepped on to the position indicated by the phantom line in the figure, the movable plate 17 moves to the position indicated by the phantom line in the figure. Allows displacement of pin 16. In other words, when starting the vehicle, it is an essential condition to step on the brake pedal BT, and the select operation of the shift lever 13 is performed while the braking force is reliably applied to the vehicle, and the safety at the time of starting is remarkably high. Be raised to.

(Problems to be Solved by the Invention) However, in such a conventional device, since the shift lever can be selected only by depressing the brake pedal, for example, a brake pedal and an accelerator pedal are used. Although it is extremely rare, such as the simultaneous stepping on, it is impossible to deal with a peculiar condition that cannot be said to be none.

That is, the A / T immediately after starting after selecting from the non-running range to the running level automatically selects the low speed stage (for example, the first speed) and transmits a large drive torque to the drive system. Therefore, even if the brake pedal is depressed, the driving force and the braking force compete with each other, and the braking force becomes smaller than usual. Therefore, the driver further depresses the brake pedal more strongly, and, for example, when the above-mentioned simultaneous operation is performed, the drive torque also increases, and as a result,
It becomes more difficult to stop the vehicle.

As described above, in the conventional case, there is room for improvement because it is not possible to cope with an extremely rare but peculiar condition such as simultaneous depression of the brake pedal and the accelerator pedal.

(Object of the Invention) Therefore, the present invention allows the select operation from the non-traveling range to the traveling range of the A / T by simultaneously considering the opening state of the throttle valve in addition to the operating state of the brake, thereby enabling simultaneous operation. The purpose is to prevent a sudden start under a peculiar condition such as stepping on and improve the safety when the vehicle starts.

(Means for Solving Problems) In order to achieve the above object, a vehicle start control device according to the present invention has a brake for detecting that the brake pedal is not depressed as shown in the basic conceptual diagram of FIG. The non-operation detecting means a, the valve opening detecting means b for detecting that the throttle valve opening is in a valve opening state other than the predetermined valve closing state, and the brake pedal not being depressed or the throttle valve opening being. According to the signal output signal c for outputting a prohibition signal for prohibiting the automatic transmission from selecting from the non-running range to the running range and the prohibition signal from the signal output signal c when the valve is in the open state other than the predetermined closed state. , Prohibiting the operation of the select lever of the automatic transmission, or prohibiting the supply of hydraulic pressure to the hydraulic circuit related to the driving range of the automatic transmission and prohibiting the selection from the non-driving range to the driving range. Stop means d,
Is equipped with.

(Operation) In the present invention, when the brake pedal is not depressed or the throttle valve is open, the automatic transmission is prohibited from being selected from the non-traveling range to the traveling range.

Therefore, the selection is prohibited both when the braking force is not applied and when the driving force is generated, and a sudden start under a unique condition such as simultaneous depression is avoided.

(Example) Hereinafter, the present invention will be described with reference to the drawings.

2 to 7 are diagrams showing an embodiment of a vehicle start control device according to the present invention.

First, the configuration will be described. In FIG. 2, 20 is a vehicle start control device, and the vehicle start control device 20 is a switch group.
21, a control unit 22, and a prohibiting means 23 are provided.

When the switch group 21 to select position of the shift lever of A / T (not shown) is in the P position, the parking SW24 for outputting a P position signal S _P, similarly select position is the neutral position (hereinafter, referred to as N position) N position signal S _N
, A neutral SW25 that outputs an idle signal, an idle SW26 that outputs an idle signal S _IDL when the throttle valve is in a predetermined closed state (at the time of idling) in conjunction with the opening / closing operation of an engine throttle valve (not shown), and a brake (not shown). A brake SW27 which is incorporated in the pedal and outputs a brake non-operation signal S _B when the brake pedal is not depressed.

That is, the idle SW 26 outputs the idle signal S _IDL when the throttle valve opening is in a predetermined closed state, and does not output the idle signal S _IDL when the throttle valve opening is in any other open state. Therefore, the idle SW 26 has a function as a valve opening detection means. Further, the brake SW27 functions as a brake non-operation detecting means for detecting that the brake pedal is not depressed.

Note that, for example, an inhibitor switch may be used for the parking SW 24 and the neutral SW 25, and the P position signal S _P and the N position signal S _N may be taken out from the P contact and the N contact of the switch, respectively. Also an idol
For example, a throttle valve opening sensor may be diverted to SW26, and the idle signal S _IDL may be taken out from the idle contact of this sensor.

The control unit 22 has a function as a signal output means, and includes a CPU 28, ROM 29, input port 30, output port 31, RA
The M28 is provided, and the CPU 28 sequentially executes the programs stored in the ROM 29 and accesses the input port 30 to access the signals, P
The position signal S _P , the N position signal S _N , the idle signal S _{IDL, the} brake non-operation signal S _{B, and the} like are individually fetched, and a predetermined starting control process (described later) is executed based on these signals. As a result of the execution, when each of the signals meets a predetermined condition, the output port 31 is accessed to pass through the port,
The inhibition signal S _INH is output to the inhibition means 23.

3 to 5 are views showing an example in which the prohibiting means 23 is incorporated in the A / T operating mechanism. In addition, the operating mechanism shown in FIGS.
The configuration is almost the same as that shown in FIGS. 8 and 9 shown in the conventional example, and in order to avoid re-explaining it, the same components as those in FIGS.

As shown in FIG. 4, a convex portion 35a is formed on the yoke 35 that supports the control lever 1, and the prohibiting means 23 is attached to the convex portion 35a. For example, an electromagnetic solenoid is used as the prohibiting means 23, and the prohibiting means 23 uses the prohibition signal S _INH.
The plunger 36 is actuated in response to the input of the button to project the plunger 36 outward. When the plunger 36 is protruding, the lock plate
The yoke 35 and the lock plate 37 are integrated by being inserted in the P position hole 37a or the N position hole 37b formed in the hole 37, and the tilting of the control lever 1 supported by the yoke 35 with respect to the floor surface 5 is prohibited. Reference numeral 38 denotes a position plate, and a cutout portion 38a is formed in the position plate 38, and a pin 6 which is displaced by pushing the button 3 of the control lever 1 is interposed in the cutout portion 38a. The notch 38a is provided with protrusions 38b and 38c.
8b or protrusion 38c and pin 6 are engaged with each other to control lever 1
Tilting is prohibited. That is, the control lever 1
Is prevented by the engagement of the notches 38b, 38c with the pin 6 or the engagement of the plunger 36 of the prohibiting means 23 with the P position hole 37a, N position hole 37b, whereby the A / T shift operation is performed. Is prohibited.

Next, the operation will be described.

FIG. 6 is a flowchart of the start control processing program, which is the ROM 29 of the control unit 22.
And is executed once at a predetermined time by a timer interrupt or the like.

When the ignition key is turned on, power is supplied to the control unit 22, the first timer interrupt is performed, and this program is started. First, the P position signal S _P and the N position signal S _N are checked at P ₁ , and the current selected position of the control lever 1 is in the non-traveling range (P or N position).
Or not. That is, if the vehicle is in the non-driving range position, it may be immediately selected to the traveling range position. In this case, the following process is executed to prevent sudden start.

The idle signal S _IDL is checked at P ₂ to determine whether or not the throttle valve is fully closed (a predetermined closed state, so-called idle state). That is, if the engine is in the idle state, the drive torque is small and there is no possibility of sudden start, but if the engine is operating in a state other than idle,
A large driving torque may be generated, which may cause a sudden start. Therefore, when the throttle valve opening degree is in the open valve state other than the predetermined closed state, the process proceeds to P _3, and outputs the inhibition signal S _INH. Also, when in throttle valve P ₂ is determined to be fully closed, the process proceeds to P _4, and inspect the brake non-operation signal S _B to determine whether the brake pedal is depressed. Result of the determination, for example, if no brake pedal is depressed, and outputs the inhibition signal S _INH proceeds to P _3. The reason for this is that, even when the engine is operating in an idle state, the engine speed is usually controlled to a high value depending on the conditions of various auxiliary loads and electric loads such as air conditioners.
For this reason, unless the braking force is applied to the vehicle body in advance by depressing the brake pedal, the vehicle will undesirably start at the same time when the traveling wrench is selected. In order to prevent this, even if the engine is idle, the prohibition signal S _INH is output unless the brake pedal is depressed.

As a result of the above determination of P ₁ , P ₂ and P ₃ , if the brake pedal is depressed outside the non-running range or when the throttle valve is fully closed, there is no possibility of sudden start, so proceed to P ₅ . , Stop this program without outputting the inhibit signal S _INH .

In addition, as a result of the above determination, there are two cases: when the engine is operating in a state other than the idle state and the drive torque is generated, or when the brake pedal is not depressed and the braking force is not applied to the vehicle body. The inhibit signal S _INH is output to.

The prohibition signal S _INH is output to the prohibiting means 23 shown in FIG. 3, whereby the prohibiting means 23 operates and causes the plunger 36 to project. The plunger 36 is a P position hole 37a of the lock plate 37.
Alternatively, the yoke 35 is integrated with the lock plate 37 by being inserted into the N position hole 37b. As a result, the tilting of the control lever 1 supported by the yoke 35 is prohibited, and the shift operation from the non-traveling range to the traveling range is prohibited. This prohibition state is maintained until the throttle valve is fully closed and the brake pedal is depressed. Then, when these conditions are satisfied, the prohibition state is released, the tilting of the control lever 1 is allowed, and the shift operation from the non-running range to the running range becomes possible. Therefore, the vehicle is prepared to start with a small driving torque and under the condition that the braking force is applied, and an emergency start such as a sudden start against the driver's will is avoided.

In the above embodiment, the prohibiting means 23 is provided in the gear shift operation mechanism to directly prohibit the tilting of the control lever 1 to prevent an untimely start. In this case, the transmission of the power of the power transmission system including the A / T may be prohibited, and FIG. 7 shows a preferable mode thereof.

In FIG. 7, 40 is a control valve assembly in the A / T.
It is a manual valve incorporated in. The manual valve 40 is connected to the select rod 12 for transmitting the tilting movement of the control lever 1 shown in FIG. 3, and reciprocates in the arrow direction indicated by F in the figure in response to the tilting movement of the control lever 1 (that is, gear shift operation). To do. Manual valve
The illustrated position of 40 indicates a case where the select position of the control lever 1 is at the N position.

A line pressure from an oil pump (not shown) is supplied to the manual valve 40 via an electromagnetic switching valve 41, and the line pressure is supplied to the circuit A along with the reciprocating motion of the manual valve 40.
To D selectively supply. These circuits A-D are
Single or multiple select positions P, R, D, II,
A hydraulic circuit necessary for I is formed, and line pressure is supplied to a large number of friction elements in the A / T to achieve a predetermined shift speed related to the traveling range. Further, the electromagnetic switching valve 41 has a function as the prohibiting means 23 described in FIG. 2 and is of a single electromagnet spring offset type having two ports (a, b) and two positions. The electromagnetic switching valve 41 normally supplies the line pressure to the manual valve 40 with the position shown as the normal position, but when the prohibition signal S _INH is input, the electromagnet operates to close the ports a and b. Therefore, the inhibit signal S _INH
Is input, the line pressure to the manual valve 40 is shut off, the line pressure supply to the circuits A to D related to the traveling range is prohibited, and the engagement of the friction element in the A / T is released. As a result, the friction element related to the traveling range is released to be in the neutral state, and the power is not transmitted, so that an emergency start such as a sudden start can be avoided.

(Effect of the Invention) According to the present invention, the select operation from the non-traveling range to the traveling range of the A / T is allowed in consideration of the opening state of the throttle valve in addition to the operating state of the brake. It is possible to prevent a sudden start under an extremely rare and unique condition such as simultaneous depression of the brake pedal and the accelerator pedal, and it is possible to improve safety when the vehicle starts.

[Brief description of drawings]

FIG. 1 is a basic conceptual diagram of the present invention, FIGS. 2 to 7 are diagrams showing an embodiment of a vehicle start control device of the present invention, FIG. 2 is an overall configuration diagram thereof, and FIG. FIG. 4 is a view showing a speed change operation mechanism incorporating prohibiting means, FIG. 4 is a view taken along the line IV-IV ′ in FIG. 3, FIG. 5 is a view taken along the line VV ′ in FIG. 3, and FIG. 2 is a flowchart showing the processing in the control unit of FIG. 2, and FIG. 7 is a diagram showing an example in which the prohibiting means of FIG. 2 is incorporated in the A / T. 8 to 11 are views showing a conventional gear shift operation mechanism, FIG. 8 is a view showing an example in which the tilt prohibition of the control lever is released only by a button operation, and FIG. 9 is an IX-IX in FIG. ′ A view from the arrow, FIG. 10 is a view showing an example in which the tilt prohibition of the control lever is released by the combined use of the button operation and the brake pedal operation, and FIG. 11 is an enlarged view of the G portion in FIG. 22 …… Control unit (signal output means), 23 …… Prohibition means 26 …… Idle SW (valve opening detection means), 27 …… Brake SW (brake non-operation detection means), 41 …… Electromagnetic switching valve (prohibition means) ).

Claims (1)

[Claims] Claims: 1. A) brake non-operation detecting means for detecting that the brake pedal is not depressed, and b) valve opening for detecting that the throttle valve opening is in an open state other than a predetermined closed state. Detection means and c) When the brake pedal is not depressed, or when the throttle valve opening is in an open state other than the predetermined closed state, the automatic transmission is prohibited from being selected from the non-running range to the running range. A signal output means for outputting a prohibition signal, and d) prohibiting the operation of the select lever of the automatic transmission according to the prohibition signal from the signal output means, or supplying hydraulic pressure to a hydraulic circuit related to the traveling range of the automatic transmission. A vehicle start control device comprising: prohibition means for prohibiting selection from a non-driving range to a driving range;