JPH0874613A - Automatic engine stopping/starting device - Google Patents

Abstract

PURPOSE: To adapt an engine automatic stopping/starting device to an automatic transmission vehicle by composing automatic stopping conditions of an engine speed, a car speed, and presence/absence of a stopping allowance signal, and automatic stopping conditions of the engine speed, a shift lever position, and presence/absence of an accelerator idling condition. CONSTITUTION: Automatic stopping conditions are composed of SP1 that en gine speed shows an idling state, SP2 that car speed is substantially zero, and SP3 that a stopping allowance signal is generated (ON) from a transmission control unit when a detected shift lever position is neutral. When all the conditions are effected, an engine is automatically stopped through a gate G2 indicating an OR condition and a gate G1 indicating an AND condition. An automatic starting conditions are composed of that an engine speed is zero, the shift lever is at a neutral position, and the detected accelerator condition is an idling condition. When the all conditions are effected, automatic starting is performed through gates indicating AND and OR conditions.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic engine stop / start device, and more particularly to a device for automatically stopping and automatically starting an engine when a predetermined condition is satisfied in a vehicle such as an automobile.

[0002]

2. Description of the Related Art Generally, when a vehicle is driving in an urban area, it may stop at an intersection or a railroad crossing. If the engine is idled at this time, fuel is consumed and the fuel consumption rate decreases. .

Therefore, when a certain condition such as a vehicle stop is satisfied, the engine is stopped to cut off the fuel consumption during a temporary stop, and when a predetermined condition is satisfied thereafter, the engine is automatically restarted. An automatic engine stopping / starting device has already been proposed.

FIG. 15 shows stop conditions and start conditions in such an automatic engine stop / start device.

First, regarding the automatic engine stop condition, the following four items are required at a minimum, as shown in FIG. The vehicle speed should be approximately 0km / h. The engine speed must be 800 rpm or less. The gear is in neutral.

The clutch pedal is not depressed.

In addition to the above, it is preferable to add the following items as shown by the dotted line in the figure. The engine coolant temperature must be 40 ° C or higher. The air pressure should be 64kPa or more. A vehicle speed of 10 km / h or higher has been detected since the system was turned on. No failure was found by the failure diagnosis.

That is, when the vehicle is stopped, the engine is idling and the gear is in neutral.
The clutch pedal is not stepped on, and more preferably,
The engine is warm, there is sufficient air pressure in the air tank for the air cylinder (see Fig. 3, etc.) to automatically stop the engine, that at least one vehicle run has been confirmed, and there is no malfunction. When the engine automatic stop condition is satisfied, the intake shutter (see FIG. 3 etc.) is closed by the air cylinder to close the intake air of the engine to automatically stop the engine and reduce waste gas and noise. The aims.

On the other hand, after the engine is automatically stopped as described above, the conditions for restarting the engine are shown in FIG.
The following three well-known items are required as shown in (b). The engine speed is 0 rpm. Be gear neutral. The clutch is depressed.

[0010]

The conventional engine automatic stop / start device described above is mounted on a manual vehicle and cannot be applied to an automatic transmission (AT) type vehicle. It has not been. Therefore, the present invention can be applied to an automatic transmission vehicle in an engine automatic stop / start device that automatically stops the engine when a predetermined condition is satisfied and automatically starts the engine when another predetermined condition is satisfied. The purpose is to do.

[0011]

Means and Actions for Solving the Problems Means and actions of an automatic engine stop / start device according to the present invention for achieving the above-mentioned object are as follows: the automatic stop condition shown in FIG. 1 and the automatic start shown in FIG. Various aspects will be described below with reference to the conditions.

[1] First, in the present invention, a shift lever position detecting means for an automatic transmission, an accelerator idle state detecting means, and a transmission control unit for generating a stop permission signal when the shift lever position is neutral are provided. The automatic stop condition is configured by the engine speed, the vehicle speed, and the presence / absence of the stop permission signal, and the automatic start condition is configured by the engine speed, the shift lever position, and the presence / absence of the accelerator idle state.

That is, the automatic stop condition is as shown in FIG.
When the engine speed is in an idle state (for example, 800 rpm or less) (SP), the vehicle speed is substantially zero (SP), and the shift lever position detected by the shift lever position detecting means is the neutral transmission Stop permission signal is generated from the control unit (ON)
When all of these are satisfied, the engine is automatically stopped via the gate G2 indicating the OR condition and the gate G1 indicating the AND condition.

The automatic starting conditions shown in FIG. 2 are that the engine speed is 0 (ST), the shift lever position is in neutral (ST), and the accelerator state detected by the accelerator idle state detecting means. Is in the idle state (ST), and when all of these are satisfied, the engine is automatically started via the gate G4 indicating the AND condition and the gate G5 indicating the OR condition.

[2] In the present invention, the shift lever position detecting means of the automatic transmission and the transmission control for generating the stop permission signal when the shift lever position is neutral and the start permission signal in the automatic stop state. A unit may be provided, the automatic stop condition may be configured by the engine speed, the vehicle speed, and the presence or absence of the stop permission signal, and the automatic start condition may be configured by the engine speed and the presence or absence of the start permission signal.

That is, the automatic stop condition is the above-mentioned invention [1].
As in the case of SP to SP, the automatic start condition is shown in FIG.
As shown in, the engine speed is 0 (ST
In addition to the above), when the shift lever position detected by the shift lever position detecting means is in the neutral state and is in the automatic stop state, a start permission signal is generated from the transmission control unit (ST). When satisfied, the engine is automatically started via the gate G6 indicating the AND condition and the gate G5 indicating the OR condition.

[3] According to the present invention, shift lever position detecting means for an automatic transmission, engine starting operation means, and a transmission control unit for generating a stop permission signal when the shift lever position is neutral are provided. The automatic stop condition is configured by the engine speed, the vehicle speed, and the presence / absence of the stop permission signal, and the automatic start condition is configured by the engine speed, the shift lever position, and the presence / absence of operation of the engine start operation means. You can

That is, even in the present invention, the automatic starting condition is the conditions SP to SP as in the above-mentioned present invention [1], but the automatic starting condition is that the engine speed is 0 as shown in FIG. (ST), the shift lever position detected by the shift lever position detecting means is neutral (ST), and the engine starting operation means (S).
W) is operated (ON) (ST), and when all of these conditions are satisfied, the engine is automatically started via the gate G7 indicating the AND condition and the gate G5 indicating the OR condition. It

[4] According to the present invention, a shift lever position detection means and an accelerator idle state detection means for the automatic transmission are provided, and the automatic stop conditions are engine speed, vehicle speed, and the shift lever position in the travel range. The automatic start condition can be configured by the engine speed, the shift lever position, and the presence or absence of the accelerator idle state.

That is, the automatic stop condition is that the engine speed is in the idle state (SP) as shown in FIG.
When the vehicle speed is substantially 0 (SP) and the shift lever position detected by the shift lever position detecting means is in the traveling range (SP), all of these conditions are satisfied. The engine is automatically stopped via the gates G2 and G1 in.

Further, the automatic starting condition is the above-mentioned [1] of the present invention.
The same as ST to ST, the engine is automatically started via the gates G4 and G5 in FIG.

[5] In the present invention, the shift lever position detecting means of the automatic transmission and the transmission control unit for generating a start permission signal when the shift lever position is in the neutral state and in the automatic stop state are provided. The stop condition can be configured by the engine speed, the vehicle speed, and whether or not the shift lever position is in the travel range, and the automatic start condition can be configured by the engine speed and the presence or absence of the start permission signal.

That is, the automatic stop condition is the above-mentioned [4] of the present invention.
And SP, SP, and SP, and gate G
The engine is automatically stopped by 2 and G1.

The automatic starting conditions are ST and ST as in the case of the present invention [2], and the engine is automatically started through the gates G6 and G5.

[6] In the present invention, the shift lever position detecting means of the automatic transmission and the engine starting operation means are provided, and the automatic stop condition is the engine speed, the vehicle speed, and the shift lever position are the traveling range. The automatic start condition can be configured by the engine speed, the shift lever position, and whether or not the engine start operation means is operated.

That is, the automatic stop condition is the above-mentioned invention [2].
Under the same conditions SP, SP, and SP, the engine is automatically stopped via the gates G2 and G1.

Further, the automatic starting conditions are the same as the above-mentioned present invention [3], the conditions ST, ST, ST shown in FIG.
When all of these are satisfied, the engine can be automatically started via the gate G7 indicating the AND condition and the gate G5 indicating the OR condition.

[7] According to the present invention, shift lever position detecting means, engine stop operating means, and accelerator idle state detecting means of the automatic transmission are provided, and the automatic stop conditions are engine speed, vehicle speed, and shift. The automatic start condition may include the engine speed, the shift lever position, and the presence or absence of the accelerator idle state, and whether or not the lever position is in the traveling range and whether or not the engine stop operating means is operated. it can.

That is, the automatic stop condition is as shown in FIG.
The engine speed is idle (SP),
The vehicle speed is substantially 0 (SP), the shift lever detected by the shift lever position detecting means is in the traveling range (SP), and the engine stop operating means is operated to indicate the intention to stop the engine. The engine is automatically stopped via the gate G3 indicating the AND condition, the gate G2 indicating the OR condition, and the gate G1 indicating the AND condition shown in FIG. It will be.

Under the automatic starting condition, the engine is automatically started by passing through the gates G4 and G5 shown in FIG. 2, which are constituted by the conditions SP to SP as in the above-mentioned [1] and [4] of the present invention. .

[8] According to the present invention, the shift lever position detecting means of the automatic transmission, the engine stop operating means, and the transmission control unit for generating the start permission signal when the shift lever position is in the neutral automatic stop state. And the automatic stop condition is constituted by an engine speed, a vehicle speed, whether or not the shift lever position is in a traveling range, and whether or not the engine stop operation means is operated, and the automatic start condition is defined as an engine speed. It can be configured with the presence or absence of the start permission signal.

That is, the automatic stop condition is composed of SP, SP, SP, SP as in the above-mentioned invention [7], and the engine is automatically stopped by the gates G3, G2, G1.

Further, the automatic starting condition is constituted by the conditions ST and ST as in the above-mentioned [2] and [5] of the present invention, and the engine is automatically started through the gates G6 and G5 shown in FIG.

[0034]

[9] According to the present invention, a shift lever position detecting means for an automatic transmission, an engine stop operating means, and an engine start operating means are provided, and the automatic stop conditions are engine speed, vehicle speed, and shift lever position. It can be configured by whether or not it is a range and whether or not the engine stop operating means is operated, and the automatic start condition can be configured by an engine speed, the shift lever position, and whether or not the engine start operating means is operated. .

That is, the automatic stop condition is composed of SP, SP, SP, SP similarly to the above-mentioned invention [7], and automatically stops the engine through the gates G3, G2, G1 shown in FIG.

Further, the automatic starting condition is the above-mentioned [3] of the present invention.
Similarly to [6] and [6], the conditions ST, ST, and ST are set, and the engine can be automatically started through the gates G7 and G5.

[10] In the above-described automatic engine stop / start device, the transmission control unit determines the presence of the permission signal by the rising or falling (change point) of the automatic stop permission signal or the automatic start permission signal. By doing so, it becomes possible to more accurately determine the existence of the permission signal.

[11] Alternatively, even if the presence of the signal is judged by the fall or rise of the output signal of the accelerator idle state detection means, the engine stop operation means, or the engine start operation means, a more accurate signal is obtained. Can be determined.

[12] In the above, when the automatic stop permission signal or the automatic start permission signal is determined, the shift lever position is not added to the determination, but the shift lever position is determined to be neutral. If it is determined whether or not this is the case, it is possible to further reliably perform automatic stop or start of the engine.

[0040]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 3 shows an embodiment of the engine automatic stop / start system according to the present invention [1]. In the figure, 1 indicates the vehicle speed from the rotation of a disc gear 1a attached to a wheel, for example. A vehicle speed sensor as a means for detecting 2 is an engine speed sensor as a means for detecting the engine speed from the rotation of a disc gear 2a attached to the crankshaft of the engine, 3 is an accelerator pedal, 30 is an accelerator pedal 3
Accelerator idle state detecting means for detecting whether or not the accelerator pedal is depressed. 4 is a shift lever, 5 is a cooling water temperature sensor as means for detecting the cooling water temperature of the engine ENG, and 6 is the air pressure of the air tank 10. It is an air pressure sensor as a means for detecting.

Reference numeral 7 denotes an engine automatic stop / start controller, which is an input port 71 for receiving the output signals of the sensors 1, 2, 5, 6 and the output signal of the switch 3 and the shift lever 4, and the output signal of the input port 71. In response to the control program stored in the memory (ROM) 73, a central processing unit (hereinafter, referred to as CPU) 72 interconnected with the memory (RAM) 74 to perform data processing, and an output signal of the CPU 72 to the outside. And an output port 75 for sending.

Further, 11 is an electromagnetic valve (M / V), which supplies the air in the air tank 10 to the air cylinder 12. Then, 13 shuts off the intake air of the engine ENG by the air from the air cylinder 12,
It is an intake shutter for stopping. still,
Reference numeral 14 is a starter motor for starting by the output signal of the output port 75.

Further, 15 is a clutch actuator 16
17 is an automatic clutch unit, and 17 is an automatic clutch unit 1
An actuator 18 connected to the engine ENG via
It is an automatic transmission (T / M) driven by.

These actuators 16 and 18 are connected to a transmission control unit 70. The transmission control unit 70 inputs the output signal of the shift lever 4 and sends an engine stop signal to the controller 7.
To the input port 71.

In this state, the CPU 7 of the controller 7
2 executes processing by the control program shown in FIGS.

FIG. 4 shows an engine automatic stop control program according to the present invention [1], which executes the conditions SP to SP shown in FIG. 1 as a program. It should be noted that this control program is executed by interrupting the main program at regular time intervals like the following control program.

First, the CPU 72 reads the engine speed signal from the engine speed sensor 2 read from the input port 70, the vehicle speed signal from the vehicle speed sensor 1 and preferably the shift lever signal from the shift lever 4, and first reads the engine. It is determined whether the rotation speed N _E is in the idle state (step S1). In this step, 800 rpm is used as the value for determining the idle state, as in FIG. 15 (a).

As a result of this judgment, this program is exited when it is found that the engine speed N _E is not in the idle state, but when it is found that it is in the idle state, in the next step S2 the vehicle speed is substantially 0 km / It is judged whether it is h, and when the vehicle speed is not almost 0 km / h,
That is, this control program is exited when the vehicle is not stopped.

When it is determined that the vehicle speed is substantially 0 Km / h and the vehicle is stopped, it is determined in step S3 whether or not the position of the shift lever 4 is neutral, and if it is not neutral, this control is performed. The program is exited, but if it is in neutral, the process proceeds to step S4.

The step S3 is shown by a dotted line, but this is always the case that the position of the shift lever 4 is set to the neutral position when the stop permission signal is generated in the steps S5 and S7 as will be described later. The above step S3 is not indispensable because it is premised. However, it is usually possible to perform a more accurate automatic stop process by simultaneously determining the position of the shift lever 4 in this way.

In step S4, the flag F1 is turned on.
It is determined whether or not ("1"), and this flag F is initially set.
Since 1 is OFF, the process proceeds to step S5, and it is determined whether or not the stop permission signal from the control unit 70 is ON.

Next, the stop permission signal will be described with reference to FIG. 5. The stop permission signal is generated when the shift lever 4 is operated to the neutral position, and when the shift lever 4 is in the neutral position. It indicates that the engine may be automatically stopped.

That is, in FIG. 5, the control unit 70 first determines that the shift lever 4 is in the neutral position (step S11), operates the clutch actuator 16 (step S12), and completely disengages the clutch 15. When it is found (step S1
3) Further, the transmission actuator 18 is further driven (step S14), the transmission 17 is made neutral (step S15), and then preferably the clutch actuator 16 is operated to connect the clutch (step S1).
6, S17), the stop permission signal is changed from OFF to ON, and is changed from ON to OFF after a fixed time (step S18).

In the automatic clutch type transmission, when the shift lever position is set to the neutral position, it is usual that the clutch is disengaged → the transmission is in neutral → the clutch is engaged. Therefore, the automatic stop permission signal is output after the steps S16 and S17. Although it is generated, it may be generated before these steps S16 and S17, and is therefore indicated by a dotted line.

In this way, the control unit 70
When the engine stop permission signal generated from is given to the CPU 72 via the input port 71, the CPU 72 determines in step S5 whether this stop permission signal is ON, and when it is OFF, this program is exited. However, when it is found that the flag is ON, that is, when the automatic stop permission signal is found to be ON, the flag F1 is turned ON (step S6).

When the flag F1 is thus turned on, the flag F1 is judged again in step S4, and as a result, the process proceeds to step S7 and the stop permission signal is set to O.
It is determined whether it is FF.

As a result, this program is exited when the stop permission signal is ON, but when it is OFF, it has fallen from the ON state to the OFF state as shown in FIG. 5, so the flag F1 is cleared. (Step S
8) By operating the electromagnetic valve 11 to supply the air in the air tank 10 to the air cylinder 12, the intake shutter 13 shuts off the intake air as shown in the figure, so that the engine ENG can be automatically stopped (step). S9).

The flag F1 is used in the flow chart of FIG. 4 so that the stop permission signal rises from OFF to ON and falls from ON to OFF after a fixed time as shown in FIG. This is because the presence of the correct stop permission signal is detected by determining the falling state of the stop permission signal, and the state in which the stop permission signal rises from OFF to ON may be similarly tried. Or simply the stop permission signal O
The N state may be detected.

Further, in the example shown in FIG. 5, the automatic clutch type transmission having the automatic clutch portion 15 is used as the automatic transmission as shown in FIG. 3, but in the case of the torque converter type automatic transmission. Has no condition corresponding to the clutch shown in FIG. 5, and can be applied in exactly the same manner.

FIG. 6 shows a control program in the case where the engine is automatically started in the present invention [1], and the automatic start conditions in this case correspond to ST to ST shown in FIG.

First, in step S21, the CPU 72 determines whether or not the engine speed N _E is 0 rpm. When the engine speed is not 0, that is, when the engine is not automatically stopped, this control program is exited.

When it is determined that the engine speed is 0, it is determined whether the shift lever 4 is in neutral (step S22).

This control program is exited when the shift lever 4 is not in neutral, but when it is found that it is in neutral, it is determined whether or not the flag F2 is ON (step S23).

Since this flag F2 is initially OFF, the routine proceeds to step S24, where it is determined whether or not the accelerator idle switch 30 shown in FIG. 3 is OFF.

As a result, the accelerator idle switch 30
When is ON, exits this control program, but OFF
If it is found that the flag F2 is ON, the flag F2 is turned ON (step S25).

After turning on the flag F2 in this way, when step S23 is passed again, the flag F2 is set to O.
Since it is N, the routine proceeds to step S26, where it is determined whether or not the accelerator idle switch 30 is ON.

As a result, the accelerator idle switch 30
When is OFF, exits this control program,
When it is ON, the flag F2 is cleared (step S
27), the starter motor 14 is energized to automatically start the engine (step S28).

Note that the flag F2 is also used in the flowchart of FIG. 6, but this is because the accelerator idle switch 30 is accurately detected by seeing the state in which the accelerator idle switch 30 rises from OFF to ON as shown in FIG. It is determined that the vehicle is in the idle position, and in this sense, the state of falling from ON to OFF may be detected in the same manner. Further, similarly to the above, the ON state of the accelerator idle switch 30 may be simply detected.

FIG. 7 shows an embodiment of the engine automatic stop / start system according to the present invention [5]. In this embodiment, the accelerator idle which is attached to the accelerator pedal 3 in the embodiment shown in FIG. The difference is that no switch is used and that the control unit 70 generates an automatic start permission signal instead of the automatic stop permission signal and applies it to the input port 71.

FIG. 8 shows a control program for automatically stopping the engine in the embodiment shown in FIG. 7. The automatic stop condition in this case is SP shown in FIG.
, Is equivalent to.

That is, in this control program, C
In PU72, the engine speed N _E is the idle speed (80
0 rpm) or less (step S31), and the vehicle speed is almost 0.
Km / h (step S32), the shift lever 4 is in the running range (step S33), and the solenoid valve 11 is not shown, but only when it is determined by the self-diagnosis function that there is no failure (step S34). To stop the engine automatically as described above (step S
35).

In this case, since the shift lever 4 is still in the traveling range, the engine is automatically stopped while the gear is in the engaged state.

FIG. 9 shows a control program for automatically starting the engine according to the present invention [5]. The automatic starting conditions in this case are the conditions ST and S shown in FIG.
Corresponds to T.

In this flowchart, the CPU 72 first determines whether or not the engine speed is 0 (step S41), and when it is determined that the engine speed N _E is 0, the position of the shift lever 4 is changed in step S42. It is determined whether or not it is neutral.

Since step S42 is also premised on the generation of a start permission signal which will be described later as indicated by the dotted line, it is not necessary to use step S42 in particular, but the position of the shift lever 4 can be accurately confirmed. This makes it possible to determine a more accurate automatic start condition.

When it is determined that the shift lever 4 is in neutral, the process proceeds to step S43 and the flag F3 is set to O.
It is determined whether it is N or not.

In this case, since the flag F3 is initially OFF, the control unit 7 is set in step S44.
It is determined whether or not the start permission signal from 0 is ON, and only when it is ON, the flag F3 is set to ON (step S45).

When the flag F3 is set to ON in this way, when passing through step S43 again, it proceeds to step S46 and it is determined whether or not the start permission signal from the control unit 70 is OFF.

As a result, the flag F3 is cleared only when the start permission signal is OFF (step S47), and the starter motor 14 is operated to automatically start the engine (step S48).

Also in the flow chart of FIG. 9, the flag F3 is used to detect the fall of the engine automatic start permission signal as shown in FIG. 2 and determine the presence of a reliable start permission signal. The case of rising from OFF to ON may be used similarly. Alternatively, the ON state of the automatic start permission signal may be simply detected.

FIG. 10 shows the conditions for generating the start permission signal in FIG. 9, which is basically the same as the conditions for generating the stop permission signal shown in FIG. 5, and steps S52 to S52 in FIG. S59 is step S1 in FIG.
It corresponds to 1 to S18.

However, in FIG. 10, since the condition is that the engine has already stopped automatically, step S5
Step S51 is provided before 2, and it is determined whether or not the engine is automatically stopped, and step S52 and subsequent steps are executed only when the engine is automatically stopped.

Also in this flowchart, steps S57 and S58 shown by the dotted lines are not necessarily required. Further, in the case of an automatic transmission using a torque converter, the clutch conditions in steps S53, S54 and steps S57, S58 are unnecessary, and the other conditions can be applied in the same manner.

FIG. 11 shows an embodiment of the engine automatic stop / start device according to the present invention [8]. In this embodiment, the engine stop switch 20 is used instead of the accelerator idle switch 30 shown in FIG. Is used, and an engine start permission signal is given from the control unit 70 to the input port 71.

The engine stop switch 20 shown in FIG. 11 is preferably installed on the head of the winker lever 20a, for example, as a place where it does not burden the driver's operation.

FIG. 12 shows a control program for automatically stopping the engine in the embodiment shown in FIG. 11. The automatic stop condition is the condition SP shown in FIG.
,,, are supported.

That is, in this flowchart, steps S31 to S in the flowchart of FIG.
Similarly to step 34, in steps S61 to S64, the engine speed N _E , the vehicle speed, the position of the shift lever 4 and whether or not there is any failure are determined in the same manner. Determine whether or not.

Since the flag F4 is initially ON, the routine proceeds to step S66, where it is determined whether or not the stop switch 20 is ON. Only when the flag F4 is ON, the flag F4 is turned on.
4 is set to ON (step S67).

When the flag F4 is turned on in this way, when step S65 is passed again, this time step S68.
Then, it is determined whether or not the stop switch 20 is OFF, and only when it is OFF, the flag F4 is cleared (step S69), the electromagnetic valve 11 is operated, and the engine is automatically stopped (step S70). .

In the flowchart of FIG. 12 as well, the confirmation determination is made by the fall of the stop switch 20, and the determination can be made similarly at the rise. Needless to say, it may be possible to determine the state in which the switch is turned on, instead of rising and falling.

The conditions for automatic engine starting executed in the embodiment shown in FIG. 11 correspond to the conditions ST and ST shown in FIG. 2, which are shown in FIG.
The description is omitted here because it is as described in the flowchart of FIG.

FIG. 13 shows an embodiment of the engine automatic stop / start system according to the present invention [3]. In this embodiment, the engine stop switch 2 shown in FIG. 11 is used.
The difference is that the engine start switch 21 is used instead of 0, and an engine stop permission signal is given from the control 70 to the input port 71.

It is preferable to install the engine start switch 21 on the head of the winker lever 20a, for example, as a place where the driver's operation is not burdened.

Since the engine automatic stop condition in this embodiment is the same as the control program of FIG. 4 showing the automatic stop condition of the present invention [3], the description thereof will be omitted here.

FIG. 14 shows a control program for automatically starting the engine in the embodiment shown in FIG. 13. The automatic starting conditions are the conditions ST,
Is equivalent to.

That is, the CPU 72 first determines whether or not the engine speed N _E is 0 (step S71),
When it is determined that the engine is stopped, it is determined whether or not the shift lever 4 is in the neutral position (step S72). Only when the shift lever 4 is in the neutral position, is the flag F5 set to ON? It is determined whether or not (step S73).

Initially, the flag F5 is not set, so the routine proceeds to step S74, where it is determined whether or not the start switch 21 is ON, and only when it is determined that it is ON, the flag F5 is set to ON. (Step S7
5).

When the flag F5 is set to ON in this way, when the process proceeds to step S73 next time, the process further proceeds to step S76, and it is determined whether or not the start switch 21 is OFF.

As a result, the flag F5 is cleared only when the start switch 21 is off (step S7).
7) Then, the starter motor 14 is energized to automatically start the engine (step S78).

Also in this flowchart, it is judged from the falling state of the starting switch 21 whether or not the starting switch 21 has been reliably operated, and it may be detected at the rising edge in the same manner, or simply the starting switch 21 may be detected. It may be determined whether or not is ON.

As described above, the embodiments of the present invention have been described by the present inventions [1], [5], [8] and [3].
It will be apparent to those skilled in the art that the present invention can be similarly applied to other inventions.

Further, although the cooling water temperature sensor 5 and the air pressure sensor 6 are used in the above embodiment, this is applied when the automatic stop condition is extended as shown by the dotted line in FIG. 15 (a). obtain.

[0103]

As described above, according to the engine automatic stop / start device of the present invention, various automatic stop / start determinations are made by detecting the shift lever position of the automatic transmission under the automatic stop condition and the automatic start condition. Since it is configured as described above, it is possible to realize automatic stop and start of the engine in a vehicle equipped with an automatic transmission.

[Brief description of drawings]

FIG. 1 is a block diagram for explaining an automatic stop condition in an engine automatic stop / start device according to the present invention.

FIG. 2 is a block diagram for explaining an automatic starting condition in the engine automatic stop / start device according to the present invention.

FIG. 3 is a system configuration diagram showing an embodiment of an engine automatic stop / start device according to the present invention [1].

FIG. 4 is a flowchart showing a control program for automatic engine stop in the automatic engine stop / start device according to the present invention [1].

FIG. 5 is a flow chart diagram for explaining a generation state of a stop permission signal used in the automatic engine stop / start device according to the present invention.

FIG. 6 is a flowchart showing a control program for automatically starting the engine in the automatic engine stop / start device according to the present invention [1].

FIG. 7 is a system configuration diagram showing an embodiment of an engine automatic stop / start device according to the present invention [5].

FIG. 8 is a flowchart showing a control program for automatic engine stop in the automatic engine stop / start device according to the present invention [5].

FIG. 9 is a flowchart showing a control program for automatically starting the engine in the engine automatic stop / start device according to the present invention [5].

FIG. 10 is a flow chart diagram for explaining a generation state of a start permission signal used in the automatic engine stop / start device according to the present invention.

FIG. 11 is a system configuration diagram showing an embodiment of an engine automatic stop / start device according to the present invention [8].

FIG. 12 is a flowchart showing a control program for automatic engine stop in the automatic engine stop / start device according to the present invention [8].

FIG. 13 is a system configuration diagram showing an embodiment of an engine automatic stop / start device according to the present invention [3].

FIG. 14 is a flowchart showing a control program for automatically starting the engine in the automatic engine stop / start device according to the present invention [3].

FIG. 15 is a block diagram showing stop conditions and start conditions of a conventionally known engine automatic stop / start device.

[Explanation of symbols]

 1 Vehicle speed sensor 2 Engine speed sensor 3 Accelerator pedal 30 Accelerator idle switch 4 Shift lever 5 Cooling water temperature sensor 6 Air pressure sensor 7 Controller 10 Air tank 11 Electromagnetic valve (M / V) 12 Air cylinder 13 Intake shutter 14 Starter motor 15 Automatic clutch part 16 Clutch Actuator 17 Automatic Transmission 18 Transmission Actuator ENG Engine 70 AT Control Unit 20 Engine Stop Switch 21 Engine Start Switch In the drawings, the same reference numerals indicate the same or corresponding parts.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display location F02N 15/00 E

Claims (12)

[Claims] 1. An automatic engine stop / start device for automatically stopping an engine when a predetermined stop condition is satisfied and automatically starting the engine when another predetermined start condition is satisfied, wherein a shift of an automatic transmission is provided. A lever position detection means, an accelerator idle state detection means, and a transmission control unit that generates a stop permission signal when the shift lever position is in neutral are provided, and the automatic stop conditions are engine speed, vehicle speed, and the stop permission signal. The automatic engine stop / start device is characterized in that the automatic start condition is configured by the engine speed, the shift lever position, and the presence or absence of the accelerator idle state. 2. An automatic engine stop / start device for automatically stopping an engine when a predetermined stop condition is satisfied and automatically starting the engine when another predetermined start condition is satisfied, wherein an automatic transmission shift is provided. A lever position detection means and a transmission control unit that generates a stop permission signal when the shift lever position is neutral and a start permission signal in the automatic stop state are provided, and the automatic stop conditions are engine speed and vehicle speed. With or without the stop permission signal,
An automatic engine stop / start device, characterized in that the automatic start condition is constituted by an engine speed and the presence or absence of the start permission signal. 3. An engine automatic stop / start device for automatically stopping an engine when a predetermined stop condition is satisfied and automatically starting the engine when another predetermined start condition is satisfied, wherein a shift of an automatic transmission is performed. A lever position detection means, an engine starting operation means, and a transmission control unit that generates a stop permission signal when the shift lever position is in neutral are provided, and the automatic stop condition is defined by engine speed, vehicle speed, and the stop permission signal. An automatic engine stop / start device comprising the presence / absence of the engine, and the automatic start condition including the engine speed, the shift lever position, and the presence / absence of operation of the engine start operation means. 4. An engine automatic stop / start device for automatically stopping an engine when a predetermined stop condition is satisfied and automatically starting the engine when another predetermined start condition is satisfied, wherein a shift of an automatic transmission is performed. A lever position detecting means and an accelerator idle state detecting means are provided, and the automatic stop condition is constituted by an engine speed, a vehicle speed, and whether or not the shift lever position is a traveling range, and the automatic start condition is an engine speed. And an automatic engine stop / start device comprising the shift lever position and the presence or absence of the accelerator idle state. 5. An automatic engine stop / start device for automatically stopping an engine when a predetermined stop condition is satisfied and automatically starting the engine when another predetermined start condition is satisfied, wherein a shift of an automatic transmission is performed. A lever position detection means and a transmission control unit for generating a start permission signal when the shift lever position is in neutral and in an automatic stop state are provided.
The automatic stop condition is configured by an engine speed, a vehicle speed, and whether the shift lever position is in a travel range, and the automatic start condition is configured by an engine speed and the presence or absence of the start permission signal. Automatic engine stop / start device. 6. An automatic engine stop / start device for automatically stopping an engine when a predetermined stop condition is satisfied and automatically starting the engine when another predetermined start condition is satisfied, wherein a shift of an automatic transmission is performed. A lever position detection means and an engine start operation means are provided, and the automatic stop condition is constituted by an engine speed, a vehicle speed, and whether or not the shift lever position is within a traveling range, and the automatic start condition is defined by an engine speed. An automatic engine stop / start device comprising the shift lever position and whether or not the engine starting operation means is operated. 7. An automatic engine stop / start device for automatically stopping an engine when a predetermined stop condition is satisfied and automatically starting the engine when another predetermined start condition is satisfied, wherein a shift of an automatic transmission is provided. A lever position detecting means, an engine stop operating means, and an accelerator idle state detecting means are provided, and the automatic stop conditions are set to the vehicle speed, the engine speed, and whether the shift lever position is within the traveling range, and the engine stop operating means. An automatic engine stop / start device comprising the presence / absence of an operation, and the automatic start condition comprising an engine speed, the shift lever position, and the presence / absence of the accelerator idle state. 8. An automatic engine stop / start device for automatically stopping an engine when a predetermined stop condition is satisfied and automatically starting the engine when another predetermined start condition is satisfied, wherein a shift of an automatic transmission is performed. A lever position detecting means, an engine stop operating means, and a transmission control unit that generates a start permission signal when the shift lever position is in a neutral and automatic stop state are provided, and the automatic stop condition is defined as vehicle speed, engine speed, and An engine characterized by comprising whether or not the shift lever position is in the traveling range and whether or not the engine stop operating means is operated, and the automatic start condition is constituted by the engine speed and the presence or absence of the start permission signal. Automatic stop / start device. 9. An automatic engine stop / start device for automatically stopping an engine when a predetermined stop condition is satisfied and automatically starting the engine when another predetermined start condition is satisfied, wherein a shift of an automatic transmission is performed. A lever position detection means, an engine stop operation means, and an engine start operation means are provided, and the automatic stop conditions are vehicle speed, engine speed, whether the shift lever position is within a traveling range, and operation of the engine stop operation means. The automatic engine stop / starting device is characterized in that the automatic start condition is configured by the engine speed, the shift lever position, and whether or not the engine start operation means is operated. 10. The automatic engine stop / start device according to claim 1, 2, 3, 5, or 8, wherein the transmission control unit detects the presence or absence of the permission signal by falling or rising of the permission signal. An automatic engine stop / start device characterized by making a judgment. 11. The automatic engine stop / start device according to claim 1, 3, 4, 7, 8 or 9, wherein the output signal of the accelerator idle state detecting means or the operating means is fallen or risen to thereby output the signal. An automatic engine stop / start device characterized by determining the presence of 12. The method of claim 1, 2, 3, 5, 8 or 10.
5. The automatic engine stop / start device according to claim 1, wherein whether or not the shift lever position is neutral is added to the condition.