JPH09209790A - Engine stop control device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To give no sense of incompatibility and no shock to a driver by detecting the state of a brake, restarting an engine from the stop state when the brake is released, and smoothly starting a vehicle when an accelerator is operated. SOLUTION: Whether an engine stop is feasible or not is judged when the prescribed time elapses after a vehicle is stopped (S1). If the engine stop is feasible, the on/-off-state of a brake is judged (S2). If the brake is set to the on-state, whether the storage capacity (SOC) value of a battery is (a)% or above or not is judged (S3). If it is (a)% or above, the control signal for stopping the engine is outputted to the engine, a motor generator, a clutch, and a transmission to stop the engine (S4). After the engine is stopped, the on/off-state of the brake is detected and judged (S5). If the brake is set to the on-state, whether the SOC value is (a)% or above or not is judged (S6). If the SOC value is (a)% or above, the engine stop state is continued. If the SOC value is below (a)%, the control signal for starting the engine is outputted to various components (S7).

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an engine stop control device, and more particularly to an engine stop control device for temporarily stopping the engine when the vehicle is stopped.

[0002]

2. Description of the Related Art Conventionally, a device for controlling engine stop during driving has been proposed as a technique for improving fuel consumption of an automobile in response to a demand for resource saving. The engine stop control device is a device that temporarily stops the engine in a stopped state while the vehicle is operating, as described below.

During driving of a vehicle, a red signal at an intersection or a vehicle frequently stops on a congested road. By stopping the engine while the vehicle is stopped, the fuel consumed by idling the engine can be saved. Focusing on this point, the engine stop control device is a device that improves the fuel efficiency of the vehicle by temporarily stopping the engine when the vehicle is stopped during driving and restarting the engine when restarting the running. is there.

1 and 2 of Japanese Unexamined Patent Publication No. 4-246252 show the structure of a conventional engine stop control device. The conventional device is configured to detect information such as vehicle speed and accelerator ON operation and output a control signal for temporarily stopping the engine while the vehicle is stopped based on the information. Specifically, when the vehicle speed is zero, the accelerator is off, and the electric equipment mounted on the vehicle is not energized, the engine stop condition is satisfied and the control signal for stopping the engine is output. Output. When the transmission is in the low gear state, the clutch is engaged, and the accelerator is turned on (that is, the accelerator pedal is depressed), the condition for restarting the engine is satisfied, and the condition for restarting the engine is set. Output a control signal.

As described above, the conventional engine stop control device sets the accelerator ON operation as a condition for restarting the engine. That is, the conventional device is configured to restart the engine by paying attention to the fact that the driver operates the accelerator pedal when the traveling is restarted, and the accelerator ON operation is used as a signal to restart the traveling.

[0006]

As described above, each of the conventional engine stop control devices is constructed to restart the engine on condition that the accelerator is turned on. However, such a configuration has the following problems.

In the conventional apparatus, a control signal for restarting the engine is output when the accelerator is turned on, the engine is cranked, the engine is started, and then the vehicle is started. That is, from the accelerator ON operation,
The vehicle starts after a time lag for the engine to actually start. Since the driver further depresses the accelerator pedal during this time lag, the vehicle is started more rapidly than when the engine is not temporarily stopped. Due to the time lag until the vehicle starts and the rapid vehicle start as described above, the vehicle may not start smoothly, which may give the driver a feeling of discomfort and shock.

Further, when the conventional apparatus is installed in a vehicle equipped with a hydraulically controlled transmission such as a general automatic transmission or a continuously variable transmission (CVT), the following problems may occur. Generally, such a vehicle is configured to generate a control hydraulic pressure for a transmission by driving an oil pressure generating means by an engine output. When the engine stop control device is operated, the control oil pressure is lowered along with the temporary stop of the engine, and the control oil pressure is generated and rises in response to the engine restart. Therefore, when a conventional device is installed, the accelerator O
Normal control of the transmission is started after a time lag from the N operation until the control oil pressure rises. Therefore, the transmission may operate before the rise of the hydraulic pressure to perform appropriate shift control, or the operation of the transmission and the start of the vehicle may occur at the same time to give a shock to the driver. From the above, the driver's discomfort and shock are further increased.

As described above, in the conventional engine stop control device, since the accelerator ON operation is the condition for engine restart, there is a time lag until the engine is actually started after the accelerator ON operation. As a result, there is a problem that the driver is discomforted and shocked.

The object of the present invention is to solve the above problems, and when the vehicle is started by restarting the engine, the start is smoothly performed together with the operation of the accelerator, and the driver feels the discomfort and the shock caused by the time lag. It is to provide an engine stop control device that does not apply to the engine.

[0011]

SUMMARY OF THE INVENTION The present invention is an engine stop control device for temporarily stopping an engine in a stopped state while a vehicle is operating, which detects an operating state of a brake,
The feature is that the engine is restarted from a stopped state when the brake is released.

According to the above construction, when the vehicle is restarted, the engine is restarted by releasing the brake. Here, since the driver generally operates the accelerator immediately after releasing the brake, the engine stop control device having the above-described configuration improves fuel efficiency almost as much as the conventional device for restarting the engine on condition that the accelerator is operated. Produce an effect. Since the engine is started prior to the accelerator ON operation, the vehicle starts smoothly with the accelerator operation. Further, when the hydraulically controlled transmission is installed, the control hydraulic pressure is raised before the accelerator is turned on, and the transmission is normally controlled during the accelerator operation.

Further, according to the present invention, when the amount of electricity stored in the electricity storage means mounted on the vehicle is detected and the amount of electricity stored falls below a predetermined value in a state where the engine is stopped and the brake is operated. It is characterized by restarting the engine. With this configuration, it is possible to prevent the life of the power storage unit from being shortened due to the reduction in the amount of power storage while the engine stop control device is operating and the engine is temporarily stopped, and it is possible to prevent the engine from being restarted. It

The vehicle provided with the engine stop control device of the present invention is, for example, a hybrid vehicle in which the engine is started by the rotational force of the motor generator.
The hybrid vehicle has less noise and shock when starting the engine, and is suitable for providing the engine stop control device of the present invention.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION

[First Embodiment] The first embodiment is a case where the engine stop control device of the present invention is applied to a hybrid vehicle. FIG. 1 is an explanatory diagram showing the engine stop control device of the present embodiment together with the configuration of a hybrid car system.

The hybrid car system is provided with an engine 1 and a motor generator 3 connected to each other, and a clutch 5, a transmission 7, a differential gear unit 9 and wheels 11 are sequentially connected to the motor generator 3 via a rotary shaft. It is provided by connecting. The above components are provided so as to transmit torque to each other. The motor generator 3 is connected to a battery 15 that is a power storage means via an inverter 13 provided as a power converter.

The engine 1 generates an engine output, and the engine output drives the motor generator 3 as a generator, and the engine output is transmitted to the wheels 11 to drive the vehicle.

The motor generator 3 is a rotating machine that functions as a generator or a motor, and its rotor is directly connected to the crankshaft of the engine 1. When functioning as a generator, the motor generator 3 is driven by the engine output as described above to generate power, and also regenerates braking energy during regenerative braking, and the generated power is the battery 15
Is stored. When functioning as a motor, the battery 1
It is rotated by power supply from 5, and the wheels 11 are driven by this rotational force to drive the vehicle. Further, the motor generator 3 functions as a motor when the engine is started, so that the engine 1 is cranked. The inverter 13 is a power converter, and has a configuration in which the alternating current generated by the motor generator 3 by the switching of the switching element is converted into direct current, and the direct current from the battery 15 is converted into alternating current for driving the motor. is there. A voltage sensor is attached to the battery 15, and the voltage value detected by the voltage sensor is output to the controller 17 described later.

The transmission 7 is a continuously variable transmission (CVT), and the transmission 7 and the clutch 5 are hydraulically controlled. As the control hydraulic pressure for both configurations, the hydraulic pressure generated by the same hydraulic pressure generating means (not shown) is used, and this hydraulic pressure generating means is driven by the engine output.

The above is the configuration of the hybrid car system provided with the engine stop control device of the present embodiment. Next, the engine stop control device of the present embodiment will be described.

This engine stop control device has a controller 17 shown in FIG. 1, to which the vehicle speed, the operating state of the brake, and the voltage value of the battery 15 are input. Further, the controller 17 is configured so that the vehicle speed becomes zero and the elapsed time after the vehicle has stopped can be known. The controller 17 is configured to output a control signal to the engine 1, the inverter 13, the clutch 5 and the transmission 7. The controller 17 is an electronic control unit (E for controlling each component of the automobile.
It can be configured using a microcomputer similar to that used for CU). Below, controller 1
The control content of 7 will be described.

Based on the input information, the controller 17 determines whether the following conditions (A) to (C) are satisfied, and if all the conditions are satisfied, it is determined that the engine stop condition is satisfied. As will be described later, it is configured to output a signal for controlling the stop of the engine 1 to each component to be controlled.

The conditions for stopping the engine 1 are: (A) "The engine can be stopped when a predetermined time has elapsed since the vehicle was stopped" (B) "Brake is on" (C) "Battery 15 The SOC value is a predetermined value a% or more. " Hereinafter, these conditions will be further described.

The satisfaction of the condition (A) is judged based on the vehicle speed information when a predetermined time has elapsed since the vehicle speed became zero. The reason for setting the condition (A) will be described. In a situation in which running and stopping are repeated little by little like when entering a garage, even if the engine is stopped every time the vehicle is stopped, the fuel consumption improvement effect is hardly obtained, and on the contrary, fuel consumption may be deteriorated. By providing the condition (A) here, it is possible to suppress the operation of the present control device in the above situation. As described above, the predetermined time in the condition (A) is set to such a time that it is determined that the vehicle is not stopping and running in small increments.

The condition (B) is judged based on the information indicating the operating state of the brake. The reason for providing the condition (B) is that the brake is released when the engine is restarted, which will be described later, and the condition for restarting the engine is that the brake must be turned on. Moreover, since the brake is generally turned on by the driver's operation while the vehicle is stopped, the condition (B) is suitable as a condition for stopping the engine.

In the condition (C), "SOC value" means
This is a numerical value representing the amount of electricity stored in the electricity storage means, and in the present embodiment, as a ratio of the amount of electricity storage to the capacity of the electricity storage means, a percentage (%)
Expressed by The SOC value is calculated based on the detected value of the appropriate state quantity set according to the type of power storage means. In this embodiment, as described above, the battery voltage is detected as this state quantity, is taken into the engine stop control device, and the SOC value is obtained from this battery voltage. It should be noted that as the state quantity for obtaining the SOC value, another state quantity indicating the charged amount may be used, and for example, the current, both the battery voltage and the current, the specific gravity of the electrolytic solution, and the like can be used.

The determination that the condition (C) is satisfied is made by comparing the SOC value obtained above with the predetermined value a%. The predetermined value a% is set to a value that ensures a sufficient amount of stored electricity in the battery if the engine 1 is stopped when the SOC value is equal to or higher than this a%. The sufficient battery charge amount is a charge amount that does not reduce the battery life if the charge amount is secured and that can supply the required voltage when the engine is restarted. From the above, by providing the condition (A),
It is prevented that the engine is stopped when the amount of electricity stored in the battery 15 is insufficient and the battery life is shortened or the engine cannot be restarted. The SOC predetermined value a% may be set to a value with a margin in consideration of the power consumption of each electric device after the engine is stopped. Further, the SOC predetermined value a% may be variably set each time the control device is operated or each time the condition (C) is determined. That is, for example, the power consumption amount during engine stop is predicted based on the operating state of each electric device, and the SOC predetermined value a% is set to a value that does not cause the battery life to decrease even if the predicted power value is consumed. You may comprise.

As described above, the controller 17 outputs a signal for controlling the stop of the engine 1 to each component when all the above conditions (A) to (C) are satisfied. Specifically, the engine is stopped by igniting the engine 1, stopping the fuel supply, or the like, and
3 is stopped, the clutch 5 is disengaged, the transmission 7 is shifted to the high side, and other signals are output to each component to prepare for engine restart.

After outputting the control signal for stopping the engine, the controller 17 determines whether or not the following conditions (D) and (E) are satisfied based on the above-mentioned input information, and then (D). When any one of the conditions (E) is satisfied, it is determined that the engine restart condition is satisfied, and as described later, a control signal for restarting the engine 1 is output to each component to be controlled. Is configured.

The conditions for restarting the engine are (D) "the brake is released" (E) "the SOC value of the battery 15 is below a predetermined value a%". Hereinafter, these conditions will be further described.

The provision of condition (D) is one of the features of the present invention. The determination that the condition (D) is established is based on the information indicating the operating state (ON / OFF) of the brake.
It is performed by judging that the brake is released (ON → OFF) when the brake OFF is detected. Since the driver restarts the vehicle by operating the accelerator immediately after releasing the brake, the release of the brake can be regarded as a signal to start the vehicle. Therefore, by setting the release of the brake as the engine restart condition, it is possible to obtain the sufficient fuel efficiency improving effect equivalent to that of the conventional control device that operates the accelerator. Further, by restarting the engine by releasing the brake, as will be described later, there is an effect of the present invention that the engine can be restarted before the accelerator is operated and the vehicle can be smoothly started along with the accelerator operation. can get.

The condition (E) is another feature of the present invention, and the judgment is made based on the detected voltage value of the battery 15 similarly to the condition (C). By providing this condition, it is possible to prevent the battery life from being shortened and prevent the engine from being restarted, as will be described below. While the engine stop control device of the present invention is operating and the engine 1 is stopped, the motor generator 3 is also stopped, and the battery 15 is discharged to drive each electric device such as a headlight. If the amount of electricity stored in the battery 15 is excessively reduced due to this discharge, the battery life may be shortened or the engine may not be restarted.
Here, an appropriate SOC predetermined value is determined, and this predetermined value is
When the value is below the limit, the engine is restarted, and the motor generator 3 is driven by the engine output to generate electric power, thereby preventing the battery life from decreasing. In the present embodiment, the SOC predetermined value is set to the same a% as the condition (C) described above, but may be set to a value different from the condition (C) as appropriate.

In a vehicle provided with an engine stop control device, if a device, such as an air conditioner, which is required to be continuously used while stopped is an engine driven type, the above-mentioned device cannot be continuously used because the engine is stopped while stopped. Will end up. Therefore, it is preferable that such a device is an electric type that can be continuously used even when the engine is stopped. In the case of such a configuration, the amount of discharge from the battery 15 while the engine is stopped further increases. Therefore, the condition (E) is provided to monitor the amount of electricity stored in the battery 15 and prevent a decrease in battery life or the like. Is especially beneficial.

As described above, the controller 17 outputs a signal for restarting the engine 1 to each component when any of the above conditions (D) and (E) is satisfied. Specifically, the motor function of the motor generator 3 outputs a control signal to the inverter 13 so that the engine 1 is cranked, and also outputs a control signal to cause the engine 1 to perform ignition and fuel supply. It also outputs control signals to the clutch 5 and the transmission 7.
The control signal output to restart the engine is
In the well-known hybrid vehicle, the same signal as that output from the electronic control unit (ECU) to each component at the time of engine start at the start of operation may be used.

FIG. 2 is a flow chart showing the operation of the engine stop control system of this embodiment. The control using the above-mentioned conditions (A) to (E) is performed according to this flowchart. When the vehicle speed becomes zero and the vehicle stops, the engine stop control device starts. Then, it is determined whether the engine can be stopped (condition (A)) after a predetermined time has passed since the vehicle was stopped (S1). If the engine cannot be stopped, the determination in step S1 is continued. If the engine can be stopped, the process proceeds to step S2 to determine the ON / OFF state of the brake (condition (B)). If the brake is off, step S
Returning to the judgment of 1, if the brake is ON, step S3
Then, the process proceeds to and it is determined whether the SOC value of the battery 15 is a% or more (condition (C)). If the SOC value is less than a%, the process returns to the determination of step S1. If the SOC value is more than a%, a control signal for stopping the engine is sent to the engine 1, the motor generator 3, the clutch 5, and the transmission 7 in step S4. Is output and the engine is stopped.

After the engine is stopped, the brake is turned on / of
The F state is detected and judged (S5, condition (D)). If the brake is ON, the routine proceeds to step S6, where the SOC value is a%
It is determined whether or not it is the above (condition (E)), and if it is a% or more, the engine stop state is continued. If the SOC value is less than a%, the process proceeds to step S7, and a control signal for starting the engine is output to each component to start the engine. When the brake OFF is detected in step S5, it is determined that the brake is released, the process proceeds to step S7, and the engine is started in the same manner as above.

FIG. 3 shows the operation of each component of the hybrid car system under the control of this engine stop control device.
It is explanatory drawing which shows a horizontal axis | shaft on a time axis typically. The figure shows a process in which the vehicle decelerates and stops, the control device starts control, the engine is restarted when the driver releases the brake, and the vehicle travel is restarted.
In the figure, from the top, the vehicle speed, accelerator ON / OFF, brake ON / OFF, engine 1 operation / stop, clutch 5 and transmission 7 control hydraulic pressure ON / OFF (control hydraulic pressure ON is hydraulic pressure rise). Indicates a state in which normal hydraulic pressure control is possible). Hereinafter, the effect of the present invention exerted by the present control device will be described with reference to FIG.

When the vehicle is stopped, the accelerator is turned from ON to OFF (A in the figure), and the brake is turned ON after a certain operation time until the driver moves his foot from the accelerator pedal to the brake pedal to turn ON the brake. (B in the figure). The vehicle speed decreases due to accelerator off and brake on,
The vehicle stops at zero speed (C in the figure). Figure 2 by stopping
The control of this controller according to the flowchart of
The engine 1 is stopped according to the output signal of the controller 17 after a lapse of a predetermined time (the predetermined time described in S1 of FIG. 2) from the stop (D in the drawing). Further, when the engine is stopped, the control hydraulic pressure of the clutch 5 and the transmission 7 generated by the engine output is also reduced.

When the brake is released after the engine is stopped, this control device detects the release of the brake and outputs a control signal for restarting the engine (E in the figure). Then, the engine 1 is started through cranking by the motor generator 3 (F in the figure). In addition, the dotted line attached to the engine starting portion in the figure shows the state during the engine starting and before the completion of the starting. When the engine is started, the hydraulic pressure generating means for generating the control hydraulic pressure for the clutch 5 and the transmission 7 is driven, and the control hydraulic pressure is generated and rises (G in the figure). The dotted line attached to the control hydraulic pressure state indicates the state immediately after the hydraulic control means is driven and before the hydraulic pressure rises, and the normal control of the clutch 5 and the like is performed after the hydraulic pressure rise (G in the figure). On the other hand, after a certain operation time after the brake is released, the driver turns on the accelerator to start the vehicle (H in the figure).

In FIG. 3, by stopping the engine from B to C, the fuel consumed by the idling operation when the engine is continuously operated during this time is saved.

Further, when the accelerator is turned on at H in the figure, the engine 1 is started (F in the figure), the control hydraulic pressure of the clutch 5 and the like rises, and the normal hydraulic control is performed (the figure). Medium G). Therefore, with the accelerator ON,
Each component of the hybrid car system such as the engine 1 and the transmission 7 operates promptly, and a smooth start is performed as in the case where the engine stop control is not performed.

As described above, according to the present embodiment, after the engine stop control device is activated and the engine is stopped, the engine is restarted under the condition that the brake is released, so that the engine is started prior to the operation of the accelerator and the clutch and the transmission are changed. The control oil pressure is generated. Therefore, it is possible to avoid the occurrence of discomfort and shock due to the time lag between the accelerator operation and the completion of engine start in the above-described conventional device. The engine stop control is performed when the amount of stored electricity in the battery falls below a predetermined value, and the engine is restarted when the amount of stored electricity falls below the predetermined value after the engine is stopped. It is possible to prevent the battery life from being shortened due to the provision of the device, and to prevent the engine from being unable to restart.

When the engine stop control device of the present invention is provided in the hybrid vehicle as described in the first embodiment, the present invention works well for the following reasons. In a vehicle provided with this control device, the engine is stopped / restarted many times during driving. Here, in the above hybrid car system, the rotor of the motor generator 3 is directly connected to the crankshaft of the engine 1, and the cranking at the time of engine start is performed by the rotational force of the motor generator 3. Low noise and shock. Therefore, it is less likely that the product will be deteriorated or the cranking mechanism will be worn or damaged due to noise or shock when the engine is restarted. As described above, the present invention suitably operates on the hybrid vehicle of this embodiment.

In addition, the engine stop control device of this embodiment may be integrated with an electronic control unit (ECU) that controls each component of the hybrid car system. In this case, it is possible to configure so that the information input to the ECU is detected and the control signal is output from the output means of the ECU to each component to be controlled.

The engine stop condition and the restart condition described in this embodiment can be changed within the scope of the present invention. For example, a condition that the engine cannot be stopped when the transmission is in the reverse state may be added to the engine stop condition. In this case, other necessary information is input to the controller 17 according to the addition of conditions or the like.

Further, although the battery 15 is provided as the power storage means of the hybrid car system in the present embodiment, the control device of the present invention can be similarly applied to the case where a capacitor is provided, for example. In this case, the voltage can be detected as the amount of electricity stored in the capacitor, and the SOC value can be obtained from the voltage. Further, the transmission 7 of the present embodiment is hydraulically controlled C
Although the VT is used, an automatic or manual transmission other than the CVT may be applied, and the present invention can be similarly applied to the case where a transmission that is not a hydraulic control type is used.

[Second Embodiment] A second embodiment is an example of the case where the engine stop control device of the present invention is applied to an automobile running with a conventional engine output. The engine stop control device of the present invention can be similarly applied to such a conventional automobile.

FIG. 4 is an explanatory diagram showing the configuration of an automobile to which the engine stop control device of this embodiment is applied. As shown in the figure, the engine 21, the clutch 23, the transmission 25,
The differential gear unit 27 and the wheels 29 are sequentially connected.
The engine stop control device has a controller 31, and the controller 31 is provided so as to control the engine 21, the clutch 23, and the transmission 25 based on input information.

A starter motor 33 is provided adjacent to the engine 21. The starter motor 33 is configured to transmit a rotational force to the engine 21 via a gear mechanism and perform cranking when the engine is started.

The starter motor 33 is connected to the battery 37 via the switch 35. It should be noted that the battery 37 is also configured to supply current to other auxiliary equipment. The switch 35 is a key switch and controller 31.
Is connected to Then, it is closed by input of a signal from either the key switch or the controller 31,
It is configured to electrically connect the starter 33 and the battery 37.

The vehicle speed, the operating state of the brake, and the voltage value of the battery 37 are input to the controller 31 as in the first embodiment. Then, as in the first embodiment, the above (A)
When all of the conditions (C) to (3) are satisfied, a control signal for stopping the engine is output to each component.

Further, the controller 31 is based on the above-mentioned input signal, and the conditions (D) and (E) described in the first embodiment are used.
When any of the above is satisfied, a control signal for restarting the engine 21 is output to each component. That is, a switch closing signal is output to the switch 35, and a control signal for ignition, fuel supply, or the like is output to the engine 21. And switch 35
When the starter motor 33 is closed, the starter motor 33 is driven by the current supplied from the battery 37, and the engine 21 is cranked by the starter motor 33 and started.

The configuration of the engine stop control device of this embodiment has been described above. The operation and effects of the engine stop control device of the present embodiment are the same as the operations and effects of the first embodiment described above with reference to FIGS.

[0054]

According to the engine stop control device of the present invention, since the engine is restarted from the stopped state when the brake is released, the engine is restarted before the accelerator is turned on. Therefore, it is possible to smoothly start the vehicle with the accelerator ON without giving the driver a feeling of strangeness or a shock due to a time lag for starting the engine unlike the conventional device.

Further, according to the present invention, the amount of electricity stored in the electricity storage means is detected, and when the amount of electricity stored falls below a predetermined value, the engine is restarted, so that the amount of electricity stored decreases while the engine is temporarily stopped. The life of the power storage unit is prevented from being shortened, and the engine cannot be restarted.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing a configuration of a hybrid automatic operator having an engine stop control device according to a first embodiment of the present invention.

FIG. 2 is a flowchart showing a control operation of the engine stop control device according to the first embodiment of the present invention.

FIG. 3 is an explanatory diagram schematically showing the operation of each component of the hybrid car system under the control of the engine stop control device of the first embodiment of the present invention, with the horizontal axis representing the time axis.

FIG. 4 is an explanatory diagram showing a configuration of an automobile provided with an engine stop control device according to a second embodiment of the present invention.

[Explanation of symbols]

1 engine, 3 motor generator, 5 clutch,
7 transmission, 13 inverter, 15 battery, 17
controller.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Office reference number FI technical display location F02N 11/08 F02N 11/08 K 15/00 15/00 E

Claims (3)

[Claims] 1. An engine stop control device for temporarily stopping an engine in a stopped state while a vehicle is operating, which detects an operating state of a brake and restarts the engine from the stopped state when the brake is released. An engine stop control device characterized by the above. 2. The engine stop control device according to claim 1, further comprising detecting an amount of electricity stored in an electricity storage means mounted on the vehicle,
An engine stop control device for restarting an engine when the amount of stored electricity falls below a predetermined value in a state where the engine is stopped and a brake is operated. 3. The engine stop control device according to claim 1, wherein the vehicle is a hybrid vehicle that starts an engine with a rotational force of a motor generator.