JP2001173477A - Vehicle automatic start control system - Google Patents

Abstract

(57) Abstract: The present invention relates to a vehicle engine automatic start control device, and prevents a decrease in vehicle comfort due to an engine stop. SOLUTION: When the engine is automatically stopped,
When a predetermined time elapses after the engine is stopped, the engine restart prohibition condition is not satisfied. Thereafter, when either one of the basic starting condition reflecting the driver's intention to start the vehicle and the forced starting condition for forcibly starting the engine in a predetermined state of the vehicle is satisfied, the engine is forcibly started by the engine restarting means. The vehicle is restarted to reliably prevent a decrease in vehicle comfort due to the engine stoppage.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicular engine automatic start control device applied to an idle stop vehicle that automatically stops the engine when the engine is idling.

[0002]

2. Description of the Related Art Conventionally, there has been developed and proposed an idle stop vehicle in which an engine is automatically stopped (auto stop) during idling of a vehicle to suppress fuel consumption and improve fuel efficiency. In such an idle stop vehicle, generally, the driver's intention to stop is determined based on clutch operation information, shift operation information, accelerator operation information, vehicle speed information, and the like, and the engine is automatically stopped or automatically restarted (auto-start). It is.

[0003]

However, in such a conventional idle stop vehicle, if there is a possibility that the engine stoppage may impair the comfort of the vehicle after the engine is automatically stopped, a warning sound is issued to the driver. However, there is a problem that the engine is not restarted unless the driver performs an operation for restarting the engine (e.g., depressing a clutch).

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has been made in consideration of the above-described circumstances. It is an object to provide a starting control device.

[0005]

According to the first aspect of the present invention, in a vehicle engine automatic start control apparatus according to the present invention, in a state where an engine is automatically stopped, a predetermined time has elapsed after the engine was stopped and a restart prohibition condition is not satisfied. Then, when either one of the basic starting conditions reflecting the driver's intention to start the vehicle and the forced starting condition for forcibly starting the engine in a predetermined state of the vehicle is satisfied, the engine is forcibly started by the engine restart means. Restart. By providing such a forced start condition, it is possible to reliably prevent a decrease in vehicle comfort due to the stop of the engine.

According to a second aspect of the present invention, there is provided a vehicle engine automatic start control apparatus according to the present invention, in a state where the engine is automatically stopped, a basic starting condition for determining a driver's intention to start the vehicle, and the engine operates according to a compression stroke injection. If either one of the forced starting conditions for forcibly starting the engine before falling into a state where starting is impossible is satisfied, the engine is forcibly restarted by the engine restarting means. As a result, the comfort of the vehicle caused by the stop of the engine is reliably prevented from decreasing, and when the direct injection gasoline engine is used as the engine, the startability of the engine is reliably prevented from decreasing.

[0007]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an automatic start control system for a vehicle engine according to an embodiment of the present invention; FIG. (A) and (b) are diagrams for explaining the characteristics, and FIG. 4 is a flowchart for simply explaining the operation.

The vehicle to which the present invention is applied automatically stops the engine when a predetermined condition (automatic stop condition) is satisfied during idling operation of the engine, and satisfies a predetermined condition (automatic start condition) after the automatic stop of the engine. 1 is a so-called idle stop vehicle having a function of restarting the engine. As shown in FIG. 1, an engine control means (ECU) 1 includes an automatic engine stop means 2 and an engine restart means 3. Have been.

The engine restart means 3 includes a normal restart means 3a, a forced restart means 3b, and a forced restart prohibition means 3c. These normal restart means 3
a, the normal restart condition (or basic start condition), the forced restart means 3b and the forced restart prohibiting means 3c, respectively.
In a state where a forced restart condition (or a forced start condition) and a forced restart prohibition condition (or a restart prohibition condition) are set and the forced restart prohibition condition is not satisfied,
When the normal restart condition is satisfied or the forced restart condition is satisfied, the engine is restarted.

For this reason, the ECU 1 includes a vehicle speed sensor 10 for detecting the vehicle speed V of the vehicle, an accelerator sensor 11 for detecting depression of an accelerator pedal, a shift position sensor 12 for detecting a shift speed including a neutral position of the transmission. , Clutch switch 1 for detecting depression of clutch pedal
3, an engine speed sensor 14 for detecting the engine speed Ne, a water temperature sensor 15 for detecting the temperature Tw of the cooling water, an air conditioner ECU 16 for controlling the operation state of a compressor of the air conditioner, and detection of lighting of a vehicle light. Switch 17, a current sensor 18 for detecting an electric load of the vehicle, a temperature sensor 19a for detecting an outside air temperature Ta, and an intake air temperature sensor 19 for detecting an intake air temperature Tin.
b and a catalyst temperature sensor 19c for detecting a catalyst temperature Tc
A fuel pressure sensor 20 for detecting a fuel injection pressure Pf;
A negative pressure sensor 21 for detecting a master back negative pressure of the brake device, an ignition key sensor 22 for detecting an on / off state of an ignition key, and a main switch 23 for turning on / off the entire idle stop function are connected.

The main switch 23 is, for example, an on / off switch provided on an instrument panel.
After the ignition key is turned on, the driver can manually turn off the ignition key to cancel the entire idle stop function. And E
The engine automatic stop means 2 and the engine restart means 3 of the CU 1 set an engine stop control signal and an engine restart signal based on the information from the sensors 10 to 23, and set the fuel injection control means 30 and the starter 31. Output.

Next, the basic logic of the automatic stop (auto start) and the automatic start (auto start) of the engine will be described. First, when the ignition key is turned on, the ECU 1 always turns on the main switch 23 to set an idle stop standby state in which the engine can be automatically stopped and restarted. The idle stop standby state is the most basic condition for performing the automatic stop and the automatic start, and the automatic stop condition and the automatic start condition of the engine described below may be the idle stop standby state. It is a premise. (1) Automatic engine stop condition Various conditions as described later are set in the automatic engine stop means 2. In the present embodiment, in particular, the automatic stop basic condition and the automatic stop permission condition are two. When the basic conditions for automatic stop and the conditions for permitting automatic stop are both satisfied, the automatic engine stop means 2 issues an engine stop signal to the fuel injection control means 30 to stop the engine. I have.

Among these, the basic condition for automatic stop is to determine the driver's intention to stop the vehicle, and the following conditions (1) to (4)
When all the conditions are satisfied, it is determined that the basic condition for automatic stop is satisfied. (1) No vehicle speed (vehicle speed V = 0 km / h) (2) The shift position is neutral (3) The clutch is fully connected (the foot is released) (4) Idling state It is provided to determine whether the state is a state that does not impair comfort and safety, and the automatic stop permission condition is satisfied when all of the following (1) to (9) are satisfied Is determined. (1) A predetermined time (10 minutes) after the previous restart (auto start)
sec) Progress: Eliminating discomfort (2) Completion of warm-up operation (water temperature Tw≥predetermined value T ₁ ): Ensuring quick start-up (3) Air-conditioner compressor not operating: Ensuring air-conditioning function (4) Headlight off: Ensuring illuminance (5) electrical load a predetermined value or less: battery protection (6) masterback negative圧所value or more (difference圧所value than the atmospheric pressure): braking force providing (7) water temperature a predetermined value T ₃ below or intake air temperature given below: ignition (8) The catalyst temperature is equal to or higher than a predetermined value (catalyst temperature Tc ≧ predetermined value T
c ₁ ): Ensuring activation of the catalyst (9) Outside air temperature not more than predetermined value (outside air temperature Ta ≦ predetermined value Ta ₁ )
The heater is not operating and the air conditioner function is secured. The above (1) is for the driver to feel uncomfortable if the engine is automatically stopped immediately after restarting the engine. Time (for example, 10
Until the time elapses, automatic stop is prohibited.

The condition (2) is provided so that the engine can be restarted quickly and surely at the time of restart. In the case of a direct injection gasoline engine, the condition (2) is provided so that the engine can be started quickly by the compression stroke. . The condition (3) is mainly provided for ensuring the air-conditioning function, and is intended not to automatically stop the air-conditioner compressor during operation. In other words, the condition is that "the interior of the vehicle is currently sufficiently cooled and there is no need to operate the air conditioner compressor".

Here, the operating state of the air conditioner compressor
Can be obtained from an air conditioner ECU 16 not shown.
It has become. The air conditioner ECU 16 also has
Temperature sensor that detects the temperature of the upstream and downstream of the evaporator
Are connected, and the air conditioner ECU 16
Control the compressor operation based on information from the temperature sensor.
Control. In the ECU 1, the air
Temperature information of the evaporator obtained through the con ECU 16
Based on the information, for example, the refrigerant temperature downstream of the evaporator ≤ location
Constant value T_ev1And refrigerant temperature upstream of the evaporator ≦ predetermined value T
_ev2(However, T _ev1<T_ev2) If there is
It is determined that the impreza does not operate.
The operation of the air conditioner compressor is directly detected, and simply
Do not stop the engine automatically when the air conditioner compressor is turned on.
You may make it not.

(4) is provided for the purpose of securing the illuminance of the headlight. That is, when the engine is automatically stopped when the headlights are turned on, the headlights are turned on by the power of the battery. However, when the engine is stopped and the power is taken out of the battery, the illuminance gradually decreases. Therefore, in order to avoid such a situation, the engine is not automatically stopped when the headlight is turned on.

(5) is provided for the purpose of protecting the battery and preventing the battery from running out. That is, in the ECU 1, based on information from the current sensor 18,
A current consumption value (instantaneous maximum current consumption value) I and a battery integrated current consumption value ΣI are calculated. For example, current consumption value I <predetermined value I ₁ × 5 sec and battery integrated current consumption value ΣI <predetermined value In the case of the value, it is determined that the electric load is equal to or less than a predetermined value. The battery voltage may be used for this determination.

(6) is a condition provided for securing the braking force. That is, when the pressure difference between the detection information from the negative pressure sensor 21 and the atmospheric pressure is equal to or less than the predetermined value, the negative pressure in the master bag becomes insufficient, and it is considered that a sufficient braking force cannot be secured after the engine is stopped. . For this reason,
In consideration of the safety of the vehicle, the automatic stop is not permitted when the pressure difference between the master back negative pressure and the atmospheric pressure is equal to or less than a predetermined value.

(7) is a condition provided for quick and reliable restart. That is, when the temperature of the cooling water of the engine becomes equal to or higher than the predetermined temperature or the temperature of the intake air becomes equal to or higher than the predetermined temperature, it is conceivable that the fuel may self-ignite before the spark of the spark plug at the time of starting the engine. In particular, at the time of restart, fuel is injected into high-temperature, high-pressure air, and self-ignition is likely to occur. Since such self-ignition occurs before the compression top dead center,
When the engine is started, a torque for reversely rotating the engine may be generated, which may cause deterioration of the startability. For this reason, the condition (7) is set so that the automatic stop is not performed in the case of a high water temperature or a high intake air temperature in consideration of startability at the time of restart.

FIG. 2 shows test results for setting an area where automatic stop is prohibited.
●, △, and □ plot the relationship between intake air temperature and water temperature in various driving patterns that are likely to be encountered in ordinary driving. From this test result, if the water temperature T ₃ and the intake air temperature predetermined value following areas below could be obtained a conclusion that can avoid self-ignition of the restart.

[0021] (8) is a condition which is provided in order to ensure the activation of the catalyst, and the condition of the automatic stop that catalyst temperature is the activation temperature Tc ₁ or more. That is, when the catalyst temperature is at a temperature lower than the activation temperature Tc _1, when you start the next engine has a catalytically inactive state, a low purification ability or absence, harmful substances discharged from the engine catalyst And will be discharged into the atmosphere without purification. This condition is set in order to prevent such a situation. As a method for detecting the catalyst temperature, measurement using a high-temperature sensor or estimation based on the engine temperature may be used. When using a high temperature sensor,
Measure the catalyst temperature by attaching it directly to the catalyst or near the catalyst. In the case of estimation based on the engine temperature, the catalyst temperature may be estimated from the engine water temperature or the oil temperature by utilizing the fact that the catalyst temperature after the engine is stopped has a correlation with the engine water temperature or the oil temperature. (9) is a condition provided for the purpose of ensuring the comfort of the vehicle interior (ensuring the performance of the heater).

Then, as described above, the basic conditions for automatic stop
Only when all of the conditions (1) to (4) are satisfied and all of the automatic stop permission conditions (1) to (9) are satisfied, the ECU 1 sends an engine operation stop signal to the fuel injection control means 30. Outputs and automatically stops the engine. (2) Engine Restart Condition Next, the engine restart condition of the present invention will be described. As described above, the engine restart means includes the normal restart means 3a, the forced restart means 3b, and the forced restart prohibition means. 3c.

First of all, the normal restart means 3
The normal restart means 3a includes the following conditions (1) as conditions for determining the driver's intention to start the vehicle.
, (2) are set, and when both of these conditions are satisfied, it is determined that the normal restart condition is satisfied. (1) The shift position must be neutral. (2) The clutch is depressed a predetermined amount (clutch switch off).

The above (1) is an absolute prerequisite at the time of restarting the engine, and is a minimum condition necessary for ensuring vehicle safety. Further, (2) is for determining that the driver has the intention to start when the driver operates the clutch, and reflecting the driver's intention in the control. Next, the forced restart means 3b will be described. The following conditions (1) to (10) are set in the forced restart means 3b. Here, the forced restart means 3b forcibly restarts the engine in order to ensure the safety and comfort of the vehicle even when the driver's intention to start is not determined by the normal restart means 3a. On the premise that the shift position is neutral,
If any one of the following conditions (1) to (10) is satisfied, it is determined that the forced start condition has been satisfied and the engine is restarted. (1) Generation of vehicle speed: securing of braking force and securing of various functions of vehicle (2) Water temperature is below a predetermined value (water temperature Tw ≦ T ₂ , T ₂ <
T ₁ ): Ensuring quick start-up (3) Air-conditioner compressor needs to be activated (when room temperature rises and air-conditioner compressor needs to be activated): Air-conditioning function secured (4) Headlight on: Illuminance secured (5 ) Electric load predetermined value or more (instantaneous maximum current consumption I ≧ predetermined value I ₁ × 5 sec or integrated battery current consumption ΣI ≧ predetermined value): Battery protection (6) Master back negative pressure predetermined value or less (difference from atmospheric pressure) (Pressure is lower than predetermined value): Ensuring braking force (7) Water temperature is higher than predetermined value or intake air temperature is higher than predetermined value (water temperature T
w ≧ predetermined value T ₃ , intake air temperature Tin ≧ predetermined value: Ensuring startability (8) Predetermined catalyst temperature (catalyst temperature Tc ≦ predetermined value T)
c ₁ ): Ensuring catalyst activation temperature (9) The outside air temperature is equal to or lower than a predetermined value (Ta ≦ Ta ₁ ) (10) Fuel pressure is below a specified value: Quick start is ensured. Of these, the condition (1) is for vehicle safety, and the vehicle speed is independent of the driver's intention. This is a condition for ensuring that the engine is started quickly when a brake occurs and a negative pressure is applied to the master back when the brake is depressed to secure the braking force.

The conditions (2) to (9) are provided for the same reason as the conditions (2) to (9) in the automatic stop permission condition described above. Note that, specifically, the condition (3) is as follows: refrigerant temperature downstream of the evaporator ≧ predetermined value T _ev3 (T
_ev3 > _Tev1 ) or the refrigerant temperature upstream of the evaporator ≧
This _means the case where T _ev4 (T _ev4 > T _ev2 ). Also,
The predetermined value of the master back negative pressure in (6) is set as a value that can sufficiently secure the braking force when the engine is stopped.

In determining the condition of the catalyst temperature equal to or lower than the predetermined value in (8), the catalyst temperature may be detected in the same manner as in the automatic stop permission condition. By utilizing the fact that there is a correlation with the catalyst temperature, the catalyst temperature may be obtained from the time after the engine is stopped. And in particular with older than a predetermined after stopping the engine hours, it is determined that the catalyst temperature Tc reaches a predetermined value Tc ₁ below, may be determined as the forced start condition is satisfied.

The condition (10) is particularly effective when the engine is a direct injection gasoline engine, and the engine is forcibly started before the engine becomes unable to be started by the compression stroke injection. Is the condition for In other words, in a normal multipoint injection engine (MPI engine), in a cylinder that first reaches the compression stroke at the time of starting, it is not possible to inhale the air-fuel mixture, and it is necessary to wait for ignition until the next compression stroke. The internal injection type gasoline engine has the advantage that the engine can be started quickly at about 1/6 cranking rotation by injecting fuel at high pressure during the first compression stroke at the start. Therefore, when the in-cylinder injection gasoline engine is used for the idle stop vehicle, the start response is improved. However, if the fuel pressure decreases at this time, the formation of spray in the cylinder may be disturbed, or atomization (atomization) of fuel droplets may not be promoted, which may hinder rapid start-up.

Therefore, as described above, when the fuel pressure falls below a predetermined value based on the information from the fuel pressure sensor 20, the engine is started immediately and the fuel pressure is kept above the predetermined value. Here, FIG. 3 shows the misfire region examined using the fuel injection amount and the fuel injection end timing as parameters. FIG. 3A shows the case where the fuel pressure is the normal fuel pressure, and FIG.
Indicates a case where the fuel pressure is a predetermined value lower than the normal fuel pressure. 3A and 3B indicate an optimal fuel injection amount at the time of starting and an optimal fuel injection end timing. From such test results, it was confirmed that the misfire range increased as the fuel pressure decreased. Further, as shown in FIG. 3B, it was also confirmed that if the fuel pressure could be maintained at a predetermined value or more, the optimal fuel injection amount and the optimal fuel injection end timing did not enter the misfire region.

In view of the above test results, the vehicle engine automatic start control device of the present invention is designed to restart the engine when the fuel pressure drops below a predetermined value after the automatic stop of the engine. It is. Next, the forced restart prohibiting means 3c will be described. The forced restart prohibiting means 3c has the following conditions for prohibiting engine restart (restart prohibition conditions). (1) Within a predetermined time after the engine is stopped This is provided for the purpose of protecting the starter 31. In other words, just before the stop of the engine, when the piston of a certain cylinder comes to just before the top dead center, it may not be able to exceed the top dead center, and the crankshaft may be reversed by a slight angle and the engine may stop. When the pinion gear of the starter is engaged with the flywheel during such reverse rotation of the crankshaft, the teeth of the pinion gear may be missing. Therefore, in the present apparatus, until a predetermined time elapses after the engine stops, even if other engine restart conditions are satisfied, the engine restart is prohibited in preference to this. .

As described above, in a state where the restart prohibition condition is not satisfied (ie, after a predetermined time has elapsed after the engine is stopped), both of the normal restart conditions (1) and (2) are satisfied. If the condition is satisfied or any one of the forced restart conditions (1) to (10) is satisfied, the engine is restarted. In addition to the above, for example, when the driver attempts to shift from neutral without stepping on the clutch while the engine is automatically stopped, a warning sound is issued to alert the driver, or the shift is actually performed. After that, the restart of the engine is prohibited.

A vehicle engine automatic start control device according to one embodiment of the present invention is configured as described above.
Hereinafter, an example of the operation will be briefly described with reference to the flowchart shown in FIG. First, this routine starts when the ignition key is turned on. Then, it is determined in step S1 whether the main switch 23 is on.
If the main switch 23 is on, the idle stop function enters the standby state, and the process proceeds to step S2 and the following steps. If the main switch 23 is off, the process returns.
However, immediately after the ignition key is turned on, the main switch 2
Since 3 is set to ON, the process proceeds from step S1 to step S2 in the first control cycle.

Next, it is determined in step S2 whether or not the engine is running. If the engine is running, the process proceeds to step S3, and if not, the process returns. Step S
At 3, it is determined whether the engine stop condition is satisfied. That is, the basic conditions (1) to (4) and the automatic stop permission condition (1) to
It is determined whether all of (9) are satisfied.

If all of these conditions are satisfied, it is determined that the engine stop condition has been satisfied, and the flow advances to step S4 to automatically stop the engine (auto stop). If at least one of the above conditions is not satisfied, the routine returns without stopping the engine. Next, the process proceeds to step S5, in which it is determined whether or not a predetermined time has elapsed since the engine was stopped, and the determination in step S5 is repeated until the predetermined time has elapsed. Then, after the elapse of the predetermined time, the engine restart prohibition condition is not satisfied, and the engine is allowed to be restarted.

After that, the process proceeds to step S6,
Whether the normal restart conditions (basic start conditions) (1) and (2) set in the normal restart means 3a in 6 have been satisfied (ie, whether the normal restart conditions have been satisfied), or Forced restart condition (forced start condition) set in forced restart means 3b
It is determined whether at least one of (1) to (10) has been satisfied (ie, whether the forced restart condition has been satisfied). When the forced restart condition is satisfied in step S6, the process proceeds to step S7 to restart the engine, and then returns.

That is, when the driver's intention to start is determined by the normal restart means 3a, the engine is naturally restarted, and the safety and comfort of the vehicle may be impaired by the forced restart means 3b. If it is determined that there is a vehicle, the engine is forcibly started to ensure safety and comfort even during the automatic stop and the driver does not intend to start.

As described above, according to the vehicle engine automatic start control device according to the embodiment of the present invention, in addition to the advantages of a general idle stop vehicle, the engine of the engine is controlled based on information from each sensor. It is determined whether there is a possibility that the safety or comfort of the vehicle may be impaired due to the stop. If it is determined that the possibility exists, the engine is forcibly (actively) activated. Since the automatic stop function is canceled or the engine is restarted, there is an advantage that vehicle safety and comfort can be ensured.

In particular, even if the driver does not intend to start after the automatic stop of the engine, there is an advantage that the safety and comfort of the vehicle can be reliably prevented from being reduced by forcibly restarting the engine. . Furthermore, when an in-cylinder injection gasoline engine is applied to the engine, the engine is forcibly started before falling into a state where rapid start by compression stroke injection is impossible, so that the startability of the engine is ensured. be able to.

Note that the vehicle engine automatic start control device of the present invention is not limited to the above-described embodiment.
Various changes can be made without departing from the spirit of the present invention. For example, as the engine, each condition other than the condition (10) relating to the start of the compression stroke is not limited to the in-cylinder injection type engine but can be widely applied to a general port injection type engine and the like. Further, the above-described predetermined values (thresholds) such as the respective temperatures and current values are merely examples, and can be variously changed according to the specifications and performance of the vehicle.

[0039]

As described above in detail, according to the vehicle engine automatic start control device of the first aspect of the present invention, after the engine is automatically stopped, the safety and comfort of the vehicle are reduced due to the stop of the engine. If the driver's performance is likely to be impaired, the engine can be forcibly restarted irrespective of the driver's intention to start, so that a reduction in vehicle comfort can be reliably prevented.

According to a second aspect of the present invention, in addition to the same advantages as in the first aspect, when the direct injection gasoline engine is applied to the engine, Since the engine is forcibly started before the start by the compression stroke injection is impossible, the startability of the engine can always be kept good.

[Brief description of the drawings]

FIG. 1 is a schematic block diagram focusing on functions of a vehicle engine automatic start control device according to an embodiment of the present invention.

FIG. 2 is a diagram illustrating characteristics of a vehicle engine automatic start control device according to an embodiment of the present invention.

FIGS. 3A and 3B are diagrams for explaining characteristics of a vehicle engine automatic start control device according to an embodiment of the present invention.

FIG. 4 is a flowchart for briefly explaining the operation of the vehicle engine automatic start control device according to one embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Control means (ECU) 2 Engine automatic stop means 3 Engine restart means 3a Normal restart means 3b Forced restart means 3c Forced restart prohibition means

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Koujiro Okada 5-33-8 Shiba, Minato-ku, Tokyo Mitsubishi Motors Corporation F-term (reference) 3G092 AA01 AA06 AC03 BB06 CA01 EA14 EA17 FA00 FB06 GA01 GA10 HA04Z HB03Z HD02Z HE01Z HE08Z HF00Z HF04Z HF05X HF07Z HF08Z HF13Z HF15Z HF19Z HF21Z HG07Z 3G093 AA01 BA00 BA21 BA22 CA02 DA01 DA04 DA05 DA06 DA12 DB00 DB05 DB09 DB10 DB12 DB15 DB20 DB25 3G301 HA00 PF04 PG00 PF13Z PF16Z PG02Z

Claims (2)

[Claims] An engine automatic stop means for automatically stopping an engine when a predetermined engine automatic stop condition is satisfied,
An automatic engine start control device for a vehicle, comprising: an engine restart means for automatically starting the engine when a predetermined engine automatic start condition is satisfied after the automatic stop of the engine. A basic starting condition for determining the intention, a forced starting condition for forcibly starting the engine when the vehicle enters a predetermined state, and a restart prohibiting condition for prohibiting the starting of the engine for a predetermined time after the automatic stop of the engine are provided. The engine restart means starts the engine when any one of the basic starting condition and the forced starting condition is satisfied after the restart prohibition condition is not satisfied, Control device. 2. An engine automatic stop means for automatically stopping an engine when a predetermined engine automatic stop condition is satisfied;
An automatic engine start control device for a vehicle, comprising: an engine restart means for automatically starting the engine when a predetermined engine automatic start condition is satisfied after the automatic stop of the engine. The engine starting means includes: a basic starting condition for determining an intention; and a forced starting condition for forcibly starting the engine before the engine falls into a state where the engine cannot be started by the compression stroke injection. An automatic engine start control device for a vehicle, wherein the engine is started when either one of the conditions is satisfied.