JP2005325757A - Engine automatic stop/restart control device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an engine automatic stop/restart control device capable of surely preventing acceleration of a vehicle at a time of restarting without complicated control. <P>SOLUTION: In this device, a rotating member 17 including a stopper engagement part 17a is attached to a shaft 15A rotating with a throttle valve of an engine, a stopper 18 driven by a solenoid and displaced between an action position in which the same can engage with a stopped engagement part of the rotating member 17 and an evacuation position in which the same can not engage with the stopper engagement part is provided, a stopper mechanism 16 limiting a rotatable range of a throttle valve by the rotating member 17 and the stopper 18 is constructed. A condition where the rotatable range of the throttle valve is limited by the stopper mechanism 16 is retained until an acceleration permission condition is established after automatic restarting control is started, and limitation of the rotatable range of the throttle valve by the stopper mechanism 16 is released when the acceleration permission condition is established. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention automatically stops and restarts an engine when a stop condition for stopping an engine that drives a vehicle is satisfied, and restarts the engine when a restart condition is satisfied. It relates to the device.

  To prevent air pollution, the engine is automatically stopped when an engine-driven vehicle stops at an intersection or the like, and the engine is automatically restarted when an operation for starting is performed. An increasing number of vehicles perform start control (also referred to as idle stop control).

  In the engine automatic stop / restart control, the brake is applied, the vehicle stops, and the engine is idle when the engine is idle for a predetermined time. Stop automatically. In addition, the engine is automatically restarted when the restart condition is satisfied, assuming that the brake is released or the accelerator is operated to the speed increasing side.

  In a vehicle that performs such control, when the engine is automatically restarted, if the accelerator is greatly operated to the speed increasing side and the throttle valve is in a fully open state or close to a fully open state, the vehicle starts suddenly. An accident may occur. Therefore, as disclosed in Patent Document 1, an engine automatic stop / restart control device including a rapid acceleration suppression control unit that suppresses sudden acceleration of a vehicle when the engine is restarted has been proposed.

In the control device disclosed in Patent Literature 1, when the accelerator is operated to the acceleration side more than a predetermined amount when the engine is restarted, control for suppressing the output torque of the engine is performed, or the brake pressure is increased. The restart condition is not established when the accelerator is operated to the speed increasing side by a predetermined amount or more.
JP 2003-175747 A

  In the control device disclosed in Patent Document 1, in order to suppress the rapid acceleration of the vehicle when the engine is restarted, the brake pressure is controlled, the intake air amount of the engine is controlled, or the fuel injection amount is controlled. Or the ignition timing needs to be controlled, which complicates the control and increases the cost.

  An object of the present invention is to provide an engine automatic stop / restart control apparatus that can reliably prevent the vehicle from accelerating at the time of restart without performing complicated control.

  The present invention restarts the engine stopped by the automatic stop control means and the automatic stop control means for automatically stopping the engine when the condition for stopping the engine driving the vehicle is satisfied. The present invention is directed to an engine automatic stop / restart control device including automatic restart control means for performing automatic restart control for automatically restarting an engine when a restart condition is satisfied.

  In the present invention, a rotating member that has a stopper engaging portion and is fixed to a shaft that rotates as the throttle valve of the engine rotates, and a stopper of the rotating member that is driven by an electric drive means. A stopper capable of being displaced between an action position at which the engagement portion can be engaged and a retracted position at which the engagement portion cannot be engaged. A stopper mechanism configured to limit the rotatable range of the throttle valve between the fully-opened position and the fully-closed position by the engagement between the opening restriction position and the fully-closed position; After the start control is started and until the acceleration permission condition for permitting the acceleration of the engine is satisfied, the throttle mechanism is held in a state where the rotation range of the throttle valve is limited, and the acceleration permission condition is satisfied To the above To release the restriction of the rotation range of the throttle valve by stopper mechanism, it provided a stopper mechanism control means for controlling said stopper mechanism.

  If the stopper mechanism and the stopper mechanism control means are provided as described above, after the automatic restart control is performed, until the condition for permitting the acceleration of the engine is satisfied, the throttle valve is increased toward the speed increasing side. Since the rotation range can be mechanically restricted, it is possible to prevent the driver from opening the throttle valve greatly when restarting, and to prevent the vehicle from starting suddenly. , Can increase safety.

  The stopper mechanism control means sets the stopper mechanism to the stopper operating state when the engine is stopped by the automatic stop control, and stops the stopper mechanism when the acceleration permission condition is satisfied after the engine is restarted by the automatic restart control. You may comprise so that it may switch to a cancellation | release state.

  In a preferred aspect of the present invention, the automatic stop timing ignition is prohibited which prohibits the operation of an ignition device that ignites the engine when the throttle valve is opened more than a set opening degree while the automatic stop control is performed and the engine is stopped. Operation prohibiting means is further provided.

  If the automatic stop time fire operation prohibition means as described above is provided, the operation of the ignition device is prohibited when the throttle valve is opened more than the set opening, so the engine is in a state in which the throttle valve is wide open. It is possible to prevent the vehicle from starting suddenly.

  The stopper mechanism control means is preferably configured to switch the stopper mechanism to the stopper release state, assuming that the acceleration permission condition is satisfied when the set return time has elapsed after the automatic restart control is started.

  In a preferred aspect of the present invention, the stopper mechanism has a plurality of stopper engaging portions that are shifted in the rotational direction of the throttle valve of the engine, and a shaft that rotates as the throttle valve rotates. A rotating member fixed to the rotating member, and an operating position that is driven by an electric driving means to be able to engage with a plurality of stopper engaging portions of the rotating member, and engages with the plurality of stopper engaging portions. A plurality of stoppers that can be displaced between the retracted positions that cannot be obtained, and by engaging any one of the plurality of stoppers with any of the plurality of stopper engaging portions, the rotation range of the throttle valve can be increased. In addition, it is configured to limit the position between one of a plurality of opening restriction positions set between the fully open position and the fully closed position and the fully closed position.

  In this case, the stopper mechanism control means reduces the range in which the throttle valve can be turned to the speed increasing side until the acceleration permission condition for permitting the acceleration of the engine is satisfied after the automatic restart control is started. After the acceleration permission condition is satisfied, the restriction of the throttle valve turning range by the stopper mechanism is released through a process of gradually increasing the range in which the throttle valve can be turned to the speed increasing side. The

  The stopper mechanism control means also reduces the range in which the throttle valve can be rotated to the acceleration side until the acceleration permission condition for permitting the acceleration of the engine is satisfied after the engine is stopped by the automatic stop control. The stopper mechanism is configured to release the restriction of the throttle valve rotation range by the stopper mechanism through a process of gradually increasing the range in which the throttle valve can be rotated to the speed increasing side after the acceleration permission condition is satisfied. It may be a means for controlling.

  In another preferred aspect of the present invention, the stopper mechanism has a stopper engaging portion and is fixed to a shaft that rotates as the throttle valve of the engine rotates, and the rotation direction of the throttle valve It is not possible to engage with the stopper engaging portion and the working position where it can be engaged with the stopper engaging portion of the rotating member by being driven by the electric driving means at different opening restriction positions spaced apart from each other. Provided with a plurality of stoppers that are displaced between the retracted positions to be in a state, and by engaging any one of the plurality of stoppers with the stopper engaging portion, the rotatable range of the throttle valve is set to the fully opened position and the fully opened position. It is comprised so that it may restrict | limit between one of the some opening degree control positions set between the closed positions, and a fully closed position.

  In this case, the stopper mechanism control means reduces the range in which the throttle valve can be turned to the speed increasing side until the acceleration permission condition for permitting the acceleration of the engine is satisfied after the automatic restart control is started. The stopper mechanism is configured to release the restriction of the throttle valve rotation range by the stopper mechanism through a process of gradually increasing the range in which the throttle valve can be rotated to the speed increasing side after the acceleration permission condition is satisfied. To control.

  The stopper mechanism control means also reduces the range in which the throttle valve can be rotated to the acceleration side until the acceleration permission condition for permitting the acceleration of the engine is satisfied after the engine is stopped by the automatic stop control. The stopper mechanism is configured to release the restriction of the throttle valve rotation range by the stopper mechanism through a process of gradually increasing the range in which the throttle valve can be rotated to the speed increasing side after the acceleration permission condition is satisfied. It may be a means for controlling.

  As described above, after the engine restarts, the throttle valve rotation range restriction by the stopper mechanism is released through a process of gradually increasing the range in which the throttle valve can be rotated toward the speed increasing side. Then, after restarting, the vehicle can be smoothly shifted to steady operation without suddenly starting the vehicle and without giving the driver a sense of incongruity.

  As described above, according to the present invention, the stopper mechanism that mechanically restrains the throttle valve of the engine to limit its rotatable range and the acceleration of the engine after the automatic restart control is started are permitted. Until the acceleration permission condition is satisfied, the throttle mechanism is held in a state in which the throttle valve can be rotated. When the acceleration permission condition is satisfied, the restriction of the throttle valve rotation range by the stopper mechanism is released. As described above, since the stopper mechanism control means for controlling the stopper mechanism is provided, it is possible to prevent the driver from performing a large opening operation of the throttle valve when restarting, and to ensure that the vehicle starts suddenly. Can be prevented and safety can be increased.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 shows an embodiment of the present invention. In FIG. 1, 1 is an electronic control unit (ECU) for controlling an engine (not shown), 2 is an ignition coil whose primary side is connected to the electronic control unit 1, A spark plug 3 attached to the engine cylinder is connected to the secondary coil of the coil 2. Reference numeral 4 denotes an excitation coil 4y that is excited by applying an excitation current from a battery 5 through a switch means (not shown) provided in the electronic control unit 1, and a normally open contact that is closed when the excitation coil 4y is excited. A starter relay 6 having an output voltage VB of the battery 5 and a starter motor for driving a crankshaft of an engine (not shown) when a drive current is applied through the contact 4a of the starter relay 4 at an output voltage VB of the battery 5, and 7 is closed when the engine is started. And a starter switch that gives a start command to the ECU. The ECU 1 includes a microprocessor, an ignition circuit that controls the primary current of the ignition coil 2, and starter relay control switch means that is turned on and off by an instruction from the microprocessor to turn on and off the excitation current of the starter relay 4. In this example, an ignition device that ignites the engine is configured by an ignition circuit and an ignition coil 2 provided in the ECU. Although not shown, a fuel injection valve for supplying fuel to the engine is attached to the intake pipe of the engine, and the fuel injection valve is configured to inject fuel from the fuel injection valve when the microprocessor generates an injection command. An injection valve drive circuit for supplying a drive current to the valve is provided in the ECU.

  8 is a flywheel magnet generator that is driven by an engine and outputs an alternating voltage, and the output voltage of the generator 8 includes a rectifier and a voltage regulator that controls the output voltage of the rectifier to be kept below a certain value. A constant DC voltage input to the rectifying power supply circuit 9 and output from the rectifying power supply circuit 9 is applied to both ends of the battery 5. The output voltage of the battery 5 is applied to the power supply terminal of the ignition circuit in the ECU 1 through the ignition switch 10.

  A retractor 11 is provided on the outer periphery of the flywheel constituting the rotor yoke of the flywheel magnet generator 8, and the front end side edge and the rear end side edge in the rotation direction of the reluctator are detected to generate pulses having different polarities. A signal generator 12 is disposed in the vicinity of the flywheel.

  Reference numeral 15 denotes a throttle sensor attached to a rotating shaft of an engine throttle valve (not shown). The throttle sensor 15 is composed of a potentiometer to which a constant DC voltage Vc is applied at both ends from a power supply circuit (not shown), and its rotation shaft is connected to the rotation shaft of the throttle valve. The throttle sensor 15 generates a voltage signal proportional to the opening of the throttle valve. This voltage signal is input to the microprocessor in the ECU 1 through an A / D converter.

  The microprocessor in the ECU 1 executes a predetermined program to automatically stop the engine that automatically stops when a stop condition for stopping the engine that drives the vehicle is satisfied. Automatic restart control means for performing automatic restart control for automatically restarting the engine when a restart condition for restarting the engine stopped by the stop control means is satisfied.

  Here, the stop condition for stopping the engine that drives the vehicle is, for example, when the idling operation is performed for a certain time after the brake sensor and the vehicle speed sensor detect that the vehicle is stopped by the brake operation. To establish. The restart condition for restarting the engine is, for example, that the brake sensor detects that the foot has been released from the brake pedal, and the throttle sensor 15 detects that the throttle valve has been opened by a predetermined opening amount by the accelerator operation. It is established when

  The automatic stop control means stops the engine by stopping the fuel supply to the engine and stopping the ignition operation of the ignition device that ignites the engine, for example, when it is detected that the stop condition is satisfied. Configured as follows. The automatic restart control means is configured to start the starter motor 6 when the restart condition is satisfied, and to restart the engine automatically by restarting the supply of fuel to the engine.

  In the present embodiment, there is provided a stopper mechanism 16 that mechanically restrains the throttle valve of the engine and restricts the range in which the engine can be turned to the speed increasing side. This stopper mechanism has a stopper engaging portion, is fixed to a shaft that rotates as the throttle valve of the engine rotates, and the rotating member 17 that is driven by electrical drive means. A stopper 18 that can be displaced between an action position at which it can engage with the stopper engaging portion and a retracted position at which it cannot engage with the stopper engaging portion. By engaging with the stopper engaging portion of the member 17, the rotatable range of the throttle valve is limited between the opening restriction position set between the fully open position and the fully closed position and the fully closed position. It is configured.

  In this embodiment, as shown in FIGS. 2 and 3, a plate-like rotating member 17 is attached to the rotating shaft 15A of the throttle sensor 15 (the shaft that rotates as the throttle valve rotates). One stopper engaging portion 17a is formed on the outer peripheral portion of the moving member. The stopper engaging portion 17a is formed of a concave portion having an arcuate cross section that opens to the front side in the rotational direction of the throttle valve toward the speed increasing side (counterclockwise in FIG. 2). Yes. The stopper 18 is composed of a plunger that is driven by a solenoid 19 to be linearly displaced in a reciprocating manner. Yes. The plunger constituting the stopper 18 is urged to the side away from the rotating member 17 by a spring (not shown). The solenoid 19 is fixed to an engine case or the like, and when the solenoid is excited, the stopper 18 moves forward toward the rotating member 17 against the biasing force of the spring and engages with the stopper engaging portion 17a. When the solenoid 19 is de-energized, it is retracted to a retracted position where it cannot be engaged with the stopper engaging portion 17a when the solenoid 19 is de-energized. The voltage of the battery 5 is applied to the solenoid 19 through a solenoid control switch means provided in the ECU and controlled to be turned on and off by a microprocessor. In FIG. 2, “open” indicates the rotation direction of the rotation member 17 when the throttle valve is opened, and “close” indicates the rotation direction of the rotation member when the throttle valve is closed.

  The opening restriction position is appropriately set according to the output of the engine. For example, when the engine output is large, the opening degree restriction position is set to a position closer to the fully closed position side than the intermediate position, the range in which the throttle valve can be rotated is narrowed, and immediately after the engine is restarted It is preferable to prevent the engine output from rapidly increasing even if the acceleration operation is performed. On the other hand, when the engine output is small, the degree of opening restriction is set to a position closer to the fully open position than when the engine output is large, and there is no danger after restarting. It is possible to allow the engine speed to be increased up to a rotational speed of. In the present embodiment, when the stopper 18 is in the operating position, the stopper 18 is engaged with the stopper engaging portion 17a when the throttle valve is rotated to the opening restriction position set at the position where the opening is 50%. A stopper 18 is provided so as to prevent the throttle valve from rotating toward the speed increasing side (to the fully open position side).

  The microprocessor of the ECU also constitutes a stopper mechanism control means by executing a predetermined program. This stopper mechanism control means holds the throttle valve in a state where the rotation range of the throttle valve is limited by the stopper mechanism 16 until the acceleration permission condition for permitting the acceleration of the engine is satisfied after the automatic restart control is started. Then, when the acceleration permission condition is satisfied, the stopper mechanism 16 is controlled so as to release the restriction of the range in which the throttle valve can be rotated by the stopper mechanism. In the present embodiment, it is assumed that an acceleration permission condition for permitting acceleration of the engine when a set time has elapsed after the engine is started is satisfied.

  In the engine control device shown in FIG. 1, when the starter switch 7 is closed, a start command is given to the microprocessor of the ECU 1. At this time, the microprocessor closes the starter relay control switch means provided in the ECU, passes a current through the exciting coil 4y of the starter relay 4, and closes the contact 4a of the starter relay 4. As a result, the starter motor 6 rotates, so that the engine is cranked and the engine is started. When the engine start is completed and the rotational speed reaches a set value, the microprocessor opens the starter relay control switch means to release the excitation of the starter relay 4, so that the contact 4a of the starter relay 4 opens and the starter motor 6 is stopped.

  The microprocessor detects the rotational speed of the engine from the pulses supplied from the signal generator 12, and detects the reference crank angle position at which the ignition timing measurement starts and the crank angle position at which the fuel injection starts.

  When the vehicle stops at an intersection or the like and the stop condition is satisfied, the microprocessor stops the fuel supply to the engine and stops the ignition operation of the ignition device that ignites the engine, thereby automatically stopping the engine.

  Thereafter, when the driver removes his foot from the brake and operates the accelerator for a predetermined amount to start the vehicle, the microprocessor turns on the starter relay control switch means to excite the excitation coil of the starter relay 4, The engine is automatically restarted by driving the starter motor 6 and restarting the fuel supply to the engine and the ignition operation of the ignition device.

  In the present embodiment, after the automatic restart control is started, until the acceleration permission condition for permitting acceleration of the engine is satisfied, the stopper mechanism 16 holds the throttle valve in a state where the rotatable range of the throttle valve is limited. Since the stopper mechanism control means for controlling the stopper mechanism 16 is provided so as to release the restriction of the rotatable range of the throttle valve by the stopper mechanism when the acceleration permission condition is satisfied, the automatic restart control is started. After that, until the acceleration permission condition is satisfied, the rotatable range of the throttle valve is limited between the opening restriction position set between the fully closed position and the fully opened position and the fully closed position. The Therefore, when the restart is performed, the throttle valve is not greatly opened, and after the engine is restarted, its rotational speed does not rapidly increase and the vehicle does not start suddenly.

  FIG. 5 shows a flowchart showing an example of a task algorithm executed by the microprocessor in the ECU 1 every time a minute time elapses in the present embodiment. If this algorithm is used, it is first determined in step 1 whether or not the engine has been stopped by automatic stop control. As a result, when it is determined that the engine is stopped by the automatic stop control, the routine proceeds to step 2 where it is determined whether or not the throttle valve opening detected by the throttle sensor 15 is equal to or greater than the set value X%. As a result of this determination, when it is determined that the rotation of the throttle valve is not equal to or greater than X%, the routine proceeds to step 3 where it is determined whether or not the restart condition has been established and the restart has been performed. If it is determined in this determination that the restart has been performed, the process proceeds to step 4 to determine whether or not the time set after the restart (return time) has elapsed. As a result, when it is determined that the set time has not elapsed, the routine proceeds to step 5 where the solenoid 19 is energized, the stopper 18 is displaced to the operating position, and the range in which the throttle valve can be rotated is limited. End this task.

  When it is determined in step 3 that the restart has not been performed, and in step 3 it is determined that the restart has been performed, and the time set after the restart in step 4 has elapsed (acceleration permission condition is satisfied) If it is determined, the routine proceeds to step 6 where the solenoid 19 is de-energized, the restriction on the range in which the throttle valve can be rotated is released, and this task ends.

  If it is determined in step 1 that the engine has been automatically stopped, and if it is determined in step 2 that the throttle valve opening is equal to or greater than X%, the engine ignition device is prohibited from performing an ignition operation and this task is terminated. To do. After this task is started, if it is determined in step 1 that the automatic stop has not been performed, the process proceeds to step 5 where the solenoid 19 is excited and the task is terminated.

  In the case of the algorithm shown in FIG. 5, the stopper mechanism control means is constituted by steps 1 to 6. Further, in steps 2 and 7, the automatic stop timing is set to prohibit the operation of the ignition device for igniting the engine when the throttle valve is opened more than the set opening degree while the automatic stop control is performed and the engine is stopped. An operation prohibiting means is configured.

  In the above embodiment, after the automatic restart control is started, until the acceleration permission condition for permitting the acceleration of the engine is satisfied, the stopper mechanism 16 holds the throttle valve in a limited range of rotation. The stopper mechanism control means is configured to release the restriction of the range in which the throttle valve can be rotated by the stopper mechanism when the acceleration permission condition is satisfied. However, the stopper mechanism control means stops the engine by the automatic stop control. When the acceleration permission condition is satisfied after the engine is restarted by the automatic restart control, the throttle valve is limited in the range in which the throttle valve can be rotated. It may be a means for controlling the stopper mechanism 16 so as to release.

  In the above embodiment, the stopper mechanism 16 is configured so that only one throttle valve opening restriction position is set. However, a plurality of opening restriction positions are provided between the throttle valve fully closed position and the fully open position. After the engine is restarted and the set time has elapsed (when the acceleration permission condition is satisfied), the throttle valve is allowed to go through the process of gradually increasing the range in which the throttle valve can be rotated. The restriction on the rotatable range of the valve may be released.

  When such control is performed, two stoppers 181 and 182 are further provided outside the stopper 18, for example, as indicated by a chain line in FIG. 2, and the stopper engaging portion 17 a of the rotating member 17 is provided. By engaging any of the stoppers 181, 18 and 182, three opening restriction positions are set. The stoppers 181, 18 and 182 are each driven by an individual solenoid.

  That is, the stopper mechanism has a stopper engaging portion 17a and is spaced from the rotating member 17 fixed to the shaft that rotates with the rotation of the throttle valve of the engine in the rotation direction of the throttle valve. It is driven by electrical driving means at different opening restriction positions and is in a state where it can engage with the stopper engaging portion 17a of the rotating member 17 and a state where it cannot engage with the stopper engaging portion 17a. A plurality of stoppers that can be displaced between the retracted positions, and by engaging any one of the plurality of stoppers with the stopper engaging portion, the rotatable range of the throttle valve can be set between the fully open position and the fully closed position. It can be configured to limit between any of the plurality of opening restriction positions set in between and the fully closed position.

  In this case, the stopper mechanism control means displaces the stopper 181 to the operating position after the automatic restart control is started and until an acceleration permission condition for permitting acceleration of the engine is satisfied, thereby increasing the speed of the throttle valve. After reducing the range of possible rotation to the side, when the acceleration permission condition is satisfied, the stopper 181 is displaced to the retracted position and the stopper 18 is displaced to the operating position to rotate the throttle valve to the speed increasing side. The process of widening the possible range by one step, and when the predetermined time elapses, the stopper 18 is displaced to the retracted position and the stopper 182 is displaced to the working position to further widen the throttle valve turning range by one step. After the process, the stopper 182 is displaced to the retracted position so that the restriction of the rotation range of the throttle valve by the stopper mechanism is released. To control the stopper mechanism.

  In this case, the stopper mechanism control means re-establishes the range in which the throttle valve can be rotated to the acceleration side until the acceleration permission condition for permitting the acceleration of the engine is satisfied after the engine is stopped by the automatic stop control. The stopper is set to release the restriction of the throttle valve rotation range by the stopper mechanism through a process of gradually increasing the range in which the throttle valve can be rotated to the speed increasing side after the acceleration permission condition is satisfied. It may be a means for controlling the mechanism.

  The stopper mechanism also has a plurality of stopper engaging portions that are shifted in the rotational direction of the throttle valve of the engine, and is fixed to a shaft that rotates as the throttle valve rotates. A member, an operation position driven by an electric drive means to be able to engage with a plurality of stopper engaging portions of the rotating member, and a retracted state where the member cannot engage with the plurality of stopper engaging portions. A plurality of stoppers that can be displaced between positions, and by engaging any one of the plurality of stoppers with any one of the plurality of stopper engaging portions, the rotatable range of the throttle valve can be set to the fully open position and the fully closed position. It can also be configured to limit between any of a plurality of opening restriction positions set between the positions and the fully closed position.

  FIG. 4 shows an example of the stopper mechanism configured as described above. In this example, the stopper member 17 has three stopper engaging portions 17a to 17c in the rotational direction and radial direction of the throttle valve. The position is shifted between the operating position where the stopper engaging portions 17a to 17c can be engaged and the retracted position where the stopper engaging portions cannot be engaged. Three stoppers 18a to 18c are provided. The stoppers 18a to 18c are arranged side by side at the same distance from the horizontal plane OO including the central axis of the rotary shaft 15A of the throttle sensor, and are respectively driven by individual solenoids to be displaced between the operating position and the retracted position. It is supposed to be made.

  Also in the case of configuring the stopper mechanism as shown in FIG. 4, the stopper mechanism control means does not stop the throttle valve until the acceleration permission condition for permitting the acceleration of the engine is satisfied after the automatic restart control is started. The range of rotation to the speed increasing side is reduced again, and after the acceleration permission condition is satisfied, the throttle valve can be turned to the speed increasing side in a stepwise manner and the throttle valve is moved by the stopper mechanism. It may be a means for controlling the stopper mechanism so as to release the restriction of the rotation range, and the throttle until the acceleration permission condition for permitting the acceleration of the engine is satisfied after the engine is stopped by the automatic stop control. The process in which the range in which the valve can be rotated toward the speed increasing side is reduced again, and after the acceleration permission condition is satisfied, the range in which the throttle valve can be rotated toward the speed increasing side is gradually increased. It may be a means for controlling the stopper mechanism so as to release the restriction of the rotation range of the throttle valve by the stopper mechanism through.

  In the above embodiment, the stopper is driven by the solenoid. However, the means for driving the stopper is not limited to the solenoid as long as it is an electric drive means.

  In the above embodiment, the acceleration permission condition for allowing the engine to accelerate when the set time has elapsed after the engine has started has been established. However, after the engine has started, the vehicle traveling speed is set to the set value. The acceleration permission condition may be satisfied when the value reaches.

  The rotating member 17 may be attached to a shaft that rotates as the throttle valve rotates, and is not necessarily attached to the rotating shaft of the throttle sensor 15. For example, the rotating member 17 may be attached to the operation shaft of the throttle valve.

It is the block diagram which showed the whole structure of the hardware of embodiment of this invention. It is a front view of the principal part of the stopper mechanism used in embodiment of FIG. It is the side view which showed the stopper mechanism used in embodiment of FIG. 1 seeing from the right side of FIG. It is the front view which showed the modification of the stopper mechanism. It is the flowchart which showed the algorithm of the task which a microprocessor performs in embodiment of this invention.

Explanation of symbols

1 ECU
2 Ignition Coil 4 Starter Relay 15 Throttle Sensor 15A Throttle Sensor Rotating Shaft 16 Stopper Mechanism 17 Rotating Member 18 Stopper 19 Solenoid

Claims (8)

Automatic stop control means for performing automatic stop control for automatically stopping the engine when a condition for stopping the engine that drives the vehicle is satisfied; and restarting the engine stopped by the automatic stop control means. In an engine automatic stop / restart control device comprising automatic restart control means for performing automatic restart control for automatically restarting the engine when a start condition is satisfied,
A rotating member that has a stopper engaging portion and is fixed to a shaft that rotates as the throttle valve of the engine rotates, and a stopper engaging portion of the rotating member that is driven by an electric driving means. A stopper that can be displaced between an action position at which it can be engaged with the stopper and a retracted position at which it cannot engage with the stopper engagement portion, and the engagement between the stopper and the stopper engagement portion. A stopper mechanism configured to limit the pivotable range of the throttle valve between an opening restriction position set between a fully open position and a fully closed position, and a fully closed position;
After the automatic restart control is started, until the acceleration permission condition for permitting acceleration of the engine is satisfied, the throttle mechanism is held in a state where the rotatable range of the throttle valve is limited, and the acceleration is continued. Stopper mechanism control means for controlling the stopper mechanism so as to release the restriction of the rotatable range of the throttle valve by the stopper mechanism when a permission condition is satisfied;
An engine automatic stop / restart control device comprising: Automatic stop control means for performing automatic stop control for automatically stopping the engine when a condition for stopping the engine that drives the vehicle is satisfied; and restarting the engine stopped by the automatic stop control means. In an engine automatic stop / restart control device comprising automatic restart control means for performing automatic restart control for automatically restarting the engine when a start condition is satisfied,
A rotating member that has a stopper engaging portion and is fixed to a shaft that rotates as the throttle valve of the engine rotates, and a stopper engaging portion of the rotating member that is driven by an electric driving means. A stopper that can be displaced between an action position at which it can be engaged with the stopper and a retracted position at which it cannot engage with the stopper engagement portion, and the engagement between the stopper and the stopper engagement portion. A stopper mechanism configured to limit the pivotable range of the throttle valve between an opening restriction position set between a fully open position and a fully closed position, and a fully closed position;
When the engine is stopped by the automatic stop control, the stopper mechanism limits the range in which the throttle valve can be rotated, and the acceleration permission condition is satisfied after the engine is restarted by the automatic restart control. A stopper mechanism control means for controlling the stopper mechanism so as to release the restriction of the rotatable range of the throttle valve by the stopper mechanism,
An engine automatic stop / restart control device comprising: Automatic stop point fire operation prohibiting means for prohibiting operation of an ignition device for igniting the engine when the throttle valve is opened more than a set opening degree while the engine is stopped with the automatic stop control being performed. More
The engine automatic stop / restart control device according to claim 1 or 2.   The stopper mechanism control means is configured to switch the stopper mechanism to a stopper release state, assuming that the acceleration permission condition is satisfied when a set return time has elapsed after the automatic restart control is started. The engine automatic stop / restart control device according to claim 1, 2 or 3. Automatic stop control means for performing automatic stop control for automatically stopping the engine when a condition for stopping the engine that drives the vehicle is satisfied; and restarting the engine stopped by the automatic stop control means. In an engine automatic stop / restart control device comprising automatic restart control means for performing automatic restart control for automatically restarting the engine when a start condition is satisfied,
A rotating member having a plurality of stopper engaging portions provided at different positions in the rotational direction of the throttle valve of the engine, and fixed to a shaft that rotates as the throttle valve rotates; An action position that is driven by a specific driving means to be able to engage with the plurality of stopper engaging portions of the rotating member, and a retracted position that cannot be engaged with the plurality of stopper engaging portions. A plurality of stoppers that can be displaced between each other, and by engaging one of the plurality of stoppers with one of the plurality of stopper engaging portions, the rotatable range of the throttle valve can be set to a fully open position and a fully closed position. A stopper mechanism configured to restrict between one of a plurality of opening restriction positions set between the position and the fully closed position;
After the automatic restart control is started, until the acceleration permission condition for permitting acceleration of the engine is satisfied, the range in which the throttle valve can be rotated to the acceleration side is reduced again, and the acceleration permission condition The stopper mechanism is released so as to release the restriction of the rotation range of the throttle valve by the stopper mechanism through a process of gradually increasing the range in which the throttle valve can be rotated to the speed increasing side after Stopper mechanism control means for controlling,
An engine automatic stop / restart control device comprising: Automatic stop control means for performing automatic stop control for automatically stopping the engine when a condition for stopping the engine that drives the vehicle is satisfied; and restarting the engine stopped by the automatic stop control means. In an engine automatic stop / restart control device comprising automatic restart control means for performing automatic restart control for automatically restarting the engine when a start condition is satisfied,
A rotating member having a stopper engaging portion and fixed to a shaft that rotates as the throttle valve of the engine rotates, and at different opening degree restriction positions spaced in the rotational direction of the throttle valve. Displacement is made between an operating position that is driven by an electric driving means to be able to engage with the stopper engaging portion of the rotating member and a retracted position that cannot be engaged with the stopper engaging portion. The throttle valve can be rotated between a fully open position and a fully closed position by engaging one of the plurality of stoppers with the stopper engaging portion. A stopper mechanism configured to restrict between any of the plurality of opening restriction positions and the fully closed position;
After the automatic restart control is started, until the acceleration permission condition for permitting acceleration of the engine is satisfied, the range in which the throttle valve can be rotated to the acceleration side is reduced again, and the acceleration permission condition The stopper mechanism is released so as to release the restriction of the rotation range of the throttle valve by the stopper mechanism through a process of gradually increasing the range in which the throttle valve can be rotated to the speed increasing side after Stopper mechanism control means for controlling,
An engine automatic stop / restart control device comprising: Automatic stop control means for performing automatic stop control for automatically stopping the engine when a condition for stopping the engine that drives the vehicle is satisfied; and restarting the engine stopped by the automatic stop control means. In an engine automatic stop / restart control device comprising automatic restart control means for performing automatic restart control for automatically restarting the engine when a start condition is satisfied,
A rotating member having a plurality of stopper engaging portions provided at different positions in the rotational direction of the throttle valve of the engine, and fixed to a shaft that rotates as the throttle valve rotates; An action position that is driven by a specific driving means to be able to engage with the plurality of stopper engaging portions of the rotating member, and a retracted position that cannot be engaged with the plurality of stopper engaging portions. A plurality of stoppers that can be displaced between each other, and by engaging one of the plurality of stoppers with one of the plurality of stopper engaging portions, the rotatable range of the throttle valve can be set to a fully open position and a fully closed position. A stopper mechanism configured to restrict between one of a plurality of opening restriction positions set between the position and the fully closed position;
The range in which the throttle valve can be turned to the speed increasing side is reduced again until the acceleration permission condition for allowing acceleration of the engine is satisfied after the engine is stopped by the automatic stop control, and the acceleration permission is set. The stopper mechanism is configured to release the restriction of the rotation range of the throttle valve by the stopper mechanism through a process of gradually increasing the range in which the throttle valve can be rotated to the speed increasing side after the condition is satisfied. Stopper mechanism control means for controlling
An engine automatic stop / restart control device comprising: Automatic stop control means for performing automatic stop control for automatically stopping the engine when a condition for stopping the engine that drives the vehicle is satisfied; and restarting the engine stopped by the automatic stop control means. In an engine automatic stop / restart control device comprising automatic restart control means for performing automatic restart control for automatically restarting the engine when a start condition is satisfied,
A rotating member having a stopper engaging portion and fixed to a shaft that rotates as the throttle valve of the engine rotates, and at different opening degree restriction positions spaced in the rotational direction of the throttle valve. Displacement is made between an operating position that is driven by an electric driving means to be able to engage with the stopper engaging portion of the rotating member and a retracted position that cannot be engaged with the stopper engaging portion. The throttle valve can be rotated between a fully open position and a fully closed position by engaging one of the plurality of stoppers with the stopper engaging portion. A stopper mechanism configured to restrict between any of the plurality of opening restriction positions and the fully closed position;
The range in which the throttle valve can be turned to the speed increasing side is reduced again until the acceleration permission condition for allowing acceleration of the engine is satisfied after the engine is stopped by the automatic stop control, and the acceleration permission is set. The stopper mechanism is configured to release the restriction of the rotation range of the throttle valve by the stopper mechanism through a process of gradually increasing the range in which the throttle valve can be rotated to the speed increasing side after the condition is satisfied. Stopper mechanism control means for controlling
An engine automatic stop / restart control device comprising:

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