JP4412015B2 - Engine idle stop control device - Google Patents

Description

  The present invention relates to an engine idle stop control device, and belongs to the technical field of environmentally friendly and low pollution of vehicles.

  In general, engine idle stop control for improving fuel efficiency, reducing emissions, suppressing noise and vibration, etc. is widely known. Various proposals have been made.

  For example, Patent Document 1 automatically stops the engine when the vehicle speed is almost zero, the shift lever is located in a non-traveling range such as a parking (P) range or a neutral (N) range, and the side brake is in use. And a technique for restarting the engine when the use of the side brake is released. As a result, the idle stop control can be applied not only to a manual transmission but also to a vehicle equipped with an automatic transmission.

  Further, in Patent Document 2, when the brake fluid pressure reflecting the driver's brake operation exceeds a predetermined reference fluid pressure, the engine is automatically stopped, and when the brake fluid pressure falls below the predetermined reference fluid pressure. A technique for restarting the engine is disclosed. As a result, the driver is not forced to perform complicated operations in order to execute the idle stop control.

Japanese Unexamined Patent Publication No. 57-186063 Japanese Patent Laid-Open No. 11-270378

  By the way, in recent years, with the spread of use such as mail-order sales and life cooperatives, home delivery vehicles have increased opportunities to enter housing complexes and residential areas. There is a report that such a delivery vehicle has a long time for the driver to stop the vehicle temporarily and carry the package to the delivery destination, and about 70% of the business hours are stopped. Therefore, when the engine is automatically stopped while the driver is getting out (absent), the time for executing the idle stop control increases, and the effect of the idle stop control such as fuel efficiency improvement and emission reduction is exerted greatly. It will be. Further, it is not necessary to turn off / on the engine every time the driver gets out of the vehicle and goes to deliveries, which frees up the troublesome operation. Furthermore, it is preferable because it also leads to prevention of inconvenience such as noise and vibration of nearby residents.

  Comparing the idle stop control in such a delivery vehicle with the conventional idle stop control in the case of waiting for a signal or traffic jam, in the latter, the driver is in the vehicle while the engine is automatically stopped, whereas in the former, the engine is It should be noted that the two are different in that the driver is away from the vehicle during the automatic stop. And as an automatic engine stop condition in such a delivery vehicle, even if the driver does not perform a special operation, the engine is normally operated when the driver normally stops the vehicle and leaves the vehicle. It is preferable to stop automatically. As a result, the driver is not forced to perform complicated operations when the engine is automatically stopped, and the driver does not feel uncomfortable.

  In addition, as a condition for restarting the engine in the delivery vehicle, it is preferable to accurately grasp the driver's intention to start and restart the engine early to achieve a smooth start. Thereby, even when the driver depresses the accelerator pedal at the time of starting the vehicle, there is no longer a response delay such as a vehicle speed not rising quickly. In particular, hydraulically actuated friction elements that connect to a power transmission path and achieve a shift stage by operating upon receiving and supplying hydraulic pressure (for example, clutches and brakes for achieving a shift stage in a general automatic transmission, In the case of a vehicle equipped with an automatic transmission equipped with a starter clutch, a mode clutch, etc. in a step transmission, the oil pump that generates the hydraulic pressure of the friction element is, for example, a mechanical oil pump that is driven by engine rotation. In such a case, the oil pump also stops generating hydraulic pressure when the engine stops, so if the driver's intention to start is accurately grasped and the engine is not restarted early, the rise of working hydraulic pressure will be delayed, The operation of the hydraulically actuated friction element is delayed. As a result, the connection of the power transmission path and the achievement of the shift stage are not in time for the driver's start operation (depressing the accelerator pedal). , Is the good, smooth start can not be expected.

  SUMMARY OF THE INVENTION An object of the present invention is to provide an engine idle stop control device suitable for a delivery vehicle that does not make the driver feel uncomfortable and that ensures good and smooth startability.

First, the invention according to claim 1 of the present application has an automatic transmission in which the state of the power transmission path is switched according to the operating state of the hydraulically operated friction element, and the hydraulic pressure of the friction element is reduced when the engine is stopped. An engine idle stop control device for a vehicle in which a generated oil pump is stopped, a home delivery use detecting means for detecting that the vehicle is being used for home delivery, and a range selecting means operated at the time of range selection A parking range selection detecting means for detecting that the parking range has been selected by the selecting means; a home delivery use of the vehicle is detected by the delivery using detection means; and a parking range is selected by the parking range selection detecting means. Engine automatic stop means that automatically stops the engine when detected, and selection to prevent selection from the parking range to another range by the range selection means Selection means for canceling the operation of the selection preventing means when the brake is depressed by a predetermined amount or more by the detection means. And engine restarting means for restarting the engine that has been automatically stopped by the engine automatic stopping means when the brake depression operation detecting means detects that the brake has been depressed more than a predetermined amount. In addition, when the delivery use of the vehicle is not detected by the delivery use detection means, the engine automatic stop means automatically detects that the parking range selection is detected by the parking range selection detection means. An engine automatic stop prohibiting means for prohibiting the stop operation is provided .

According to a second aspect of the present invention, in the engine idling stop control device according to the first aspect of the present invention, vehicle speed detecting means for detecting the speed of the vehicle, and detecting that the vehicle speed is equal to or lower than a predetermined vehicle speed by the detecting means. And when the depression of the brake is detected by the brake depression operation detecting means, the second engine automatic stop means for automatically stopping the engine, and when the brake depression amount detection is detected by the brake depression operation detection means, or the brake When the vehicle's home delivery use is not detected by the second engine restarting means for restarting the engine that has been automatically stopped by the second engine automatic stopping means and the home delivery use detecting means Instead of the engine automatic stop means and the engine restart means, the second engine automatic stop means and the second engine restart means And a non-delivery upon actuation means for actuating, characterized in that is provided.

According to a third aspect of the present invention, in the engine idle stop control apparatus according to the first or second aspect , the delivery geographical information recording means for recording geographical information for performing the home delivery service, and the time for performing the home delivery service. A delivery time information recording means for recording information, and a delivery use declaring means operated at the time of reporting that the vehicle is being used for delivery, and the delivery use detecting means comprises a current position of the vehicle and the delivery geographical information. Based on at least one of the comparison with the geographical information recorded in the recording means, the comparison between the current time and the temporal information recorded in the delivery time information recording means, and the presence or absence of the reporting by the reporting means. Detecting that the vehicle is being used for home delivery.

According to the first aspect of the present invention, when the vehicle is used for home delivery , the engine is automatically stopped when the range selection means (for example, a shift lever or the like) is operated and the parking (P) range is selected. Even if the driver does not take any special action to automatically stop the engine, the driver normally stops the vehicle and leaves the vehicle, that is, selects the parking range by the range selection means. The engine is automatically stopped by the operation, so that the driver is not forced to perform complicated operations when the engine is automatically stopped, and the driver does not feel uncomfortable.

  When the brake depressing operation detecting means for detecting a value related to the brake depressing operation detects a depression of a predetermined amount or more of the brake, the engine that has been automatically stopped until then is restarted. The intention is accurately grasped, the engine is restarted early, and a smooth start is achieved, so that the driver does not feel a response delay when the vehicle starts.

  That is, when the brake is depressed by a predetermined amount or more, the selection prevention from the parking range to another range (eg, a travel range such as the D range) by the selection prevention means (eg, shift lock mechanism) is canceled and the range is selected. Since it is permitted to select from the parking range to another range by means, it is possible to clearly recognize that the brake is depressed more than a predetermined amount as a driver's intention to start, and therefore the driver depresses the brake more than a predetermined amount. The engine was restarted at this stage (that is, the stage where the operation of the selection preventing means was released). As a result, a sufficient amount of time has passed between when the driver depresses the brake by a predetermined amount or more, selects the travel range using the range selection means, and then depresses the brake pedal and depresses the accelerator pedal. The oil pump is already fully driven and the hydraulic pressure has risen sufficiently, and the hydraulically operated friction element is fully activated to ensure the connection of the power transmission path and the achievement of the gear stage, which is good and smooth. The start will be realized.

  The predetermined amount of brake depression for canceling the operation of the selection preventing means can be arbitrarily set according to the situation, and may be set to zero, for example. That is, when the brake pedal is depressed, the driver may recognize that he / she has an intention to start by releasing the operation of the selection preventing means, and the engine may be restarted.

  As described above, the present invention tries to determine and determine the driver's intention to start by the operation release operation of the selection blocking means because the driver's brake depression operation also serves as the operation release operation of the selection blocking means. This is one of the features of the technical idea.

In particular, according to the present invention, when the vehicle is not used for home delivery, that is, during non-home delivery, the engine does not automatically stop under the above-described automatic engine stop conditions. In some cases, such a problem that the driver gets off the vehicle where the idle stop is applied and leaves or returns from the vehicle for a long time is avoided.

That is, the engine automatic stop condition is to select a parking range with a range selection means such as a shift lever. For example, the driver puts the vehicle into the parking lot and goes out for a break, or the driver This condition is also satisfied when the vehicle is stored and returned home, so if the above-mentioned automatic engine stop condition is always used, driving is performed before the delivery service is started or when the delivery service is not completed. The engine automatically stops before the driver turns the key manually to stop the engine at the end. As a result, the driver remains in the automatic engine stop state (for example, the key remains on and the battery remains on). ) Can leave the vehicle for a long time to take a break or return home. Therefore, the above-described automatic engine stop condition is not adopted in order to prompt the driver to stop the engine properly before the home delivery business starts or during the non-home delivery after the home delivery business ends. As a result, it is possible to avoid such a problem that the driver gets off the vehicle where the idle stop is applied and leaves or returns from the vehicle for a long time.

Next, according to the invention described in claim 2 , when the vehicle is not used for delivery, that is, during non-delivery, instead of the engine automatic stop condition and the restart condition described in claim 1, The engine stop and restart conditions that are well-known in the past are used for signal waiting and traffic jams, increasing the chances of performing idle stop control and increasing the effects of idle stop control such as improving fuel efficiency and reducing emissions. It will be even greater.

In the conventional idle stop control for waiting for a signal or the like, problems such as a break at the time of non-delivery and a return home as pointed out in claim 1 are unlikely to occur. In other words, in conventional idle stop control such as waiting for a signal, the engine automatically stops when the brake pedal is depressed, and the engine restarts when the brake pedal is not depressed, so even if the engine stops automatically during parking or warehousing. If the foot is lowered from the brake pedal in that state before removing the key, the engine restarts, so that the driver eventually turns off the key and stops the engine properly. On the other hand, if the key is turned off while the brake pedal is continuously depressed, the idle stop control is terminated without restarting the engine, but this does not cause any trouble.

According to the third aspect of the present invention, for example, the vehicle is used for a home delivery service by using a navigation system (in the case of using geographical information), a clock (in the case of using time information) or the like equipped in the vehicle. It can be automatically determined whether or not it is in use. In addition, the driver can manually report that the vehicle is being used for a delivery service by pressing a switch or button during delivery. Hereinafter, the present invention will be described in more detail through the best mode of the present invention.

  In the present embodiment, the present invention is applied to the vehicle 1 shown in FIG. The vehicle 1 is a commercial truck used for home delivery service, and includes an engine 10 as a drive source and an automatic transmission 20 that shifts the output rotation of the engine 10 and outputs it to the drive wheel side. . The automatic transmission 20 includes a plurality of hydraulically operated friction element groups 21 such as clutches and brakes, and a power transmission path of a speed change gear mechanism formed of, for example, a planetary gear mechanism is connected by selective operation of the friction element group 21. Are switched to achieve four forward speeds and one reverse speed. The vehicle 1 is provided with an oil pump 30 that generates the hydraulic pressure of the hydraulically operated friction element group 21. The oil pump 30 is a mechanical type that is driven by the output rotation of the engine 10 and discharges hydraulic oil. When the engine 10 stops, the oil pump 30 also stops generating hydraulic pressure.

  The vehicle 1 is provided with an idle stop control unit 100. The control unit 100 includes an idle stop execution / release determination unit, and a signal from a brake switch 51 that is turned on when the brake pedal is depressed (in the figure, the switch is denoted as Sw: the same in FIG. 3), the brake When a signal from the brake operation amount sensor 52 that detects the pedal operation amount (depression amount), a signal from the vehicle speed sensor 53 that detects the speed of the vehicle 1, and the shift lever is put into the parking (P) range. A signal from the inhibitor switch 54 that is turned on and a signal from the parking brake switch 55 that is turned on when the parking brake (side brake) is in use are input.

  Here, as shown in FIG. 2, the instrument panel in front of the driver's seat of the vehicle 1 has a home delivery switch 56, an idle stop lamp 61, a restart notification lamp 62, along with a speedometer, a tachometer, and the like. Is provided. In addition, a display 71 of the navigation system 70 is disposed at the upper part of the instrument panel. The delivery switch 56 is turned on when pressed, and the control unit 100 also receives a signal from the delivery switch 56 as shown in FIG. The idle stop lamp 61 is lit during the automatic stop period of the engine 10 to notify the driver that the engine is idling. The restart notification lamp 62 is temporarily turned on when the engine 10 is restarted to notify the driver that the engine 10 has been restarted.

  The control unit 100 executes idle stop control based on signals from these switches and sensors, and sends the control signals to the fuel injection valves 11... 11 and the spark plugs 12. This is output to the idle stop lamp 61 and the restart notification lamp 62 provided.

  On the other hand, the vehicle 1 is provided with a shift lock mechanism 40. The shift lock mechanism 40 prevents the shift lever from being moved from the selected position of the parking range to the selected position of another range (for example, a driving range such as the D range). In order to prevent this, an actuator (for example, a solenoid or the like) 41 that moves a movement blocking member such as a pin into or out of the movement path of the shift lever is provided. Then, an ON signal of the brake switch 51 and an operation amount signal of the brake operation amount sensor 52 are transmitted to the shift lock control actuator 41, and the shift lock of the shift lock mechanism 40 is based on these signals. Is executed (the above-mentioned pin is advanced) or released (same as above). Specifically, when there is an ON signal indicating that the brake pedal has been depressed from the brake switch 51, and there is an operation amount signal indicating that the brake pedal has been depressed by a predetermined amount α or more from the brake operation amount sensor 52. As long as the shift lock is released, the shift lock is executed otherwise.

  The brake operation amount sensor 52 only needs to detect a parameter that reflects the amount of depression of the brake pedal. For example, a brake fluid pressure sensor that detects the pressure of the brake fluid, or a stroke that detects the stroke amount of the brake pedal. It can be composed of a quantity sensor or the like.

  Next, idle stop control executed by the idle stop control unit 100 will be described with reference to the flowchart shown in FIG.

  First, after each detection value from the sensor or switch is input in step S1, it is determined in step S2 whether or not the vehicle 1 is being delivered, that is, whether or not the vehicle 1 is being used for delivery. This determination is made based on whether or not the home delivery switch 56 is pressed (the presence or absence of an ON signal). As a result, when the delivery is not in progress (non-home delivery: NO), the process proceeds to step S3. When the delivery is in progress (home delivery: YES), the process proceeds to step S11.

  First, in step S3 (during non-delivery), it is determined whether or not an idle stop is being performed. As a result, when the vehicle is not idling stop (NO), in step S4, the vehicle speed is zero (the vehicle speed is equal to or lower than a predetermined vehicle speed, including substantially zero), and whether or not the brake switch 51 is on, It is determined whether or not the automatic stop condition of the engine 10 employed exclusively when waiting for traffic lights or traffic is satisfied. As a result, if not satisfied (NO), the process returns as it is, and if satisfied (YES), the engine 10 is automatically stopped in step S5. That is, the fuel supply by the fuel injection valves 11... 11 and the spark ignition by the spark plugs 12. At the same time, in step S6, the idle stop lamp 61 is lit (turned on) (start of automatic stop of the engine 10). With the automatic stop of the engine 10, the oil pump 30 is also stopped, and the generation of the hydraulic pressure for the hydraulically operated friction element group 21 of the automatic transmission 20 is stopped.

  On the other hand, when the idling stop is being performed in step S3 (YES), whether or not the brake is turned off in step S7, that is, whether or not the brake switch 51 is turned off or the brake switch 51 is turned off. If not, whether or not the brake pedal operation amount detected by the brake operation amount sensor 52 has decreased (ie, the brake pedal has been depressed), that is, the engine 10 used exclusively in the conventional waiting for traffic lights or traffic jams. It is determined whether or not the starting condition is satisfied. As a result, if not satisfied (NO), the process directly returns (continuation of the automatic stop of the engine 10). If satisfied (YES), the engine 10 is restarted in step S8. That is, the fuel supply by the fuel injection valves 11... 11 and the spark ignition by the spark plugs 12. At the same time, the idle stop lamp 61 is turned off (turned off) in step S9, and the restart notification lamp 62 is temporarily turned on (turned on) in step S10 (end of automatic stop of the engine 10). As the engine 10 is restarted, the oil pump 30 is also re-driven by the engine 10 and the generation of hydraulic pressure for the hydraulically operated friction element group 21 of the automatic transmission 20 is resumed.

  On the other hand, in step S11 (at the time of home delivery), it is determined whether or not idle stop is in progress. As a result, when the engine is not idling stop (NO), in step S12, whether or not the parking (P) range is selected by the shift lever, that is, the automatic operation of the engine 10 employed during home delivery, which is a feature of the present invention. It is determined whether the stop condition is satisfied. This determination is made based on whether or not the inhibitor switch 54 is on. As a result, if not satisfied (NO), the process returns as it is, and if satisfied (YES), the engine 10 is automatically stopped in step S13. That is, the fuel supply by the fuel injection valves 11... 11 and the spark ignition by the spark plugs 12. At the same time, in step S14, the idle stop lamp 61 is turned on (start of automatic stop of the engine 10). With the automatic stop of the engine 10, the oil pump 30 is also stopped, and the generation of the hydraulic pressure for the hydraulically operated friction element group 21 of the automatic transmission 20 is stopped.

  On the other hand, if the idling stop is being performed (YES) in step S11, whether or not the brake pedal operation amount (depression amount) detected by the brake operation amount sensor 52 has exceeded the predetermined amount α in step S15. It is determined whether or not the restart condition of the engine 10 employed during home delivery, which is a characteristic part of the present invention, is satisfied. As a result, if not satisfied (NO), the process directly returns (continuation of the automatic stop of the engine 10), and if satisfied (YES), the engine 10 is restarted in step S16. That is, the fuel supply by the fuel injection valves 11... 11 and the spark ignition by the spark plugs 12. In addition, in step S17, the idle stop lamp 61 is turned off (off), and in step S18, the restart notification lamp 62 is temporarily turned on (end of the automatic stop of the engine 10). As the engine 10 is restarted, the oil pump 30 is also re-driven by the engine 10 and the generation of hydraulic pressure for the hydraulically operated friction element group 21 of the automatic transmission 20 is resumed.

  In this case, the brake pedal depression predetermined amount α used for determining whether or not to restart the engine 10 in step S15 is the brake pedal depression predetermined amount α when the shift lock of the shift lock mechanism 40 is released. Is set to the same. Therefore, when it is determined YES in step S15, the shift lock of the shift lock mechanism 40 is released at the same time, and as a result, the shift lever moves from the selected position of the parking (P) range to the selected position of the other range. It is permitted to be operated, and it becomes possible to select a travel range such as the D range with a shift lever, for example. As a result, it can be clearly recognized that the driver's intention to start is that the brake pedal has been depressed by a predetermined amount α or more. Therefore, at that stage, the brake is braked to α to such an extent that the shift lock of the shift lock mechanism 40 is released. When the pedal is depressed: YES in step S15), the engine 10 is restarted, and accordingly, the oil pump 30 is re-driven and the generation of the hydraulic pressure is resumed. As described above, according to the present invention, since the driver's brake depression operation also serves as the shift lock release operation of the shift lock mechanism 40, the driver's intention to start is determined and determined by the shift lock release operation of the shift lock mechanism 40. One of the characteristics of the technical idea is the point to be tried.

  In step S12, as an automatic stop condition of the engine 10, the vehicle speed is substantially zero, the parking brake is in use (the parking brake switch 55 is turned on), etc. Also good.

  As described above, in the idle stop control according to the present embodiment, at the time of home delivery in which the vehicle 1 is used for home delivery (in the case of YES in step S2), at least the parking (P) range is selected in step S12. Since the engine 10 is automatically stopped when the engine is stopped, the driver normally stops the vehicle 1 from the vehicle 1 even if the driver does not perform a special operation to automatically stop the engine 10. The engine 10 is automatically stopped by a normal operation performed when leaving, that is, an operation of putting the shift lever into the parking (P) range, so that the driver can perform complicated operations when the engine 10 is automatically stopped. Is not forced to feel uncomfortable.

  In step S15, when the depression of the predetermined amount α or more of the brake is detected, the engine 10 which has been automatically stopped until then is restarted, so that the driver's intention to start is accurately grasped. The engine 10 is restarted early and a smooth start is achieved, so that the driver does not feel a response delay when the vehicle 1 starts. That is, there is sufficient time between the driver depressing the brake by a predetermined amount α or more, putting the shift lever into the driving range such as the D range, and further depressing the brake pedal and depressing the accelerator pedal. Since the oil pump 30 has been sufficiently driven and the operating hydraulic pressure has risen sufficiently, the hydraulically operated friction element group 21 has fully operated, and the power transmission path of the automatic transmission 20 is connected and shifted. The achievement of the step is ensured, and the vehicle 1 can be started smoothly and smoothly.

  Here, the brake pedal depression predetermined amount α used for the determination in step S15 can be arbitrarily set according to the situation, and may be set to zero, for example. That is, when the brake pedal is depressed even a little, the driver may recognize that he / she intends to release the shift lock of the shift lock mechanism 40 and start and restart the engine 10. It is. However, in this case, the operation amount signal of the brake operation amount sensor 52 for the shift lock control actuator 41 shown in FIG. 1 is not necessary, and only the ON signal of the brake switch 51 is transmitted to the actuator 41. If there is an ON signal from the brake switch 51, the shift lock is released.

  On the other hand, when the vehicle 1 is not being used for home delivery (NO in step S2), instead of the engine automatic stop condition in step S12 and the engine restart condition in step S15, it is well known conventionally. Since the engine automatic stop condition (step S4) and engine restart condition (step S7) at the time of waiting for traffic lights and traffic jams are adopted, opportunities for executing the idle stop control increase, fuel consumption improvement, emission reduction, etc. The effect of the idle stop control will be further enhanced.

  As illustrated in FIG. 2, the instrument panel in front of the driver's seat of the vehicle 1 is provided with a home delivery switch 56, and the driver depresses the home delivery switch 56, so that the driver holds the vehicle 1. Since it is possible to manually report that the vehicle 1 is being used for the delivery service, it is possible to easily and accurately determine whether or not the vehicle 1 is being used for the delivery service in step S2.

  FIG. 4 generally shows a series of operations performed by the driver during signal waiting or traffic jams in time series. Applying this operation to the idle stop condition at the time of non-delivery (conventional idle stop condition: steps S3 to S10 in FIG. 3), as shown by the symbol A, the engine is stopped when the vehicle speed becomes zero and the vehicle stops. The engine is automatically stopped, and as indicated by the symbol B, the engine restarts when the foot is lowered from the brake pedal to start. However, even if the idle stop condition during delivery (idle stop condition of the present invention: steps S11 to S18 in FIG. 3) is applied, the engine is not automatically stopped or restarted. That is, when only the idle stop condition at the time of home delivery is always employed, the idle stop does not occur at the time of waiting for traffic lights or traffic jams.

  Next, FIG. 5 generally shows a series of operations performed by the driver during home delivery work in time series. When the idle stop condition at the time of non-delivery is applied to this operation, the engine automatically stops when the vehicle speed is zero and the vehicle stops as shown by the symbol C. Therefore, the engine restarts when the foot is lowered from the brake pedal in order to get off the vehicle, so that the driver is forced to manually turn off the engine every time the vehicle gets off. On the other hand, when the idling stop condition at the time of delivery is applied, as shown by the symbol D, the engine automatically stops when the shift lever is put into the P range after the vehicle speed becomes zero and the vehicle stops. As shown in, the engine restarts when the brake pedal is depressed to try to release the shift lock (try to start) after the delivery is over. In other words, the conventional idle stop condition cannot be used in home delivery work. On the other hand, if the idle stop condition of the present invention is adopted, the engine is turned off and on every time the driver gets off the vehicle and goes for delivery. It can be seen that it is not necessary to operate, and it is freed from troublesome operations. In addition, it can be seen that the conventional engine restart condition is that the foot is released from the brake pedal, whereas the engine restart condition of the present invention is that the brake pedal is stepped on.

  Next, FIG. 6 shows a series of operations performed by the driver in a time series in general during a break or when entering a warehouse. When the idle stop condition at the time of non-delivery is applied to this operation, as shown by the symbol G, when the vehicle speed becomes zero and the vehicle stops, the engine is automatically stopped once. The engine restarts when the foot is lifted from the brake pedal before removing the start key to get out of the vehicle to get home, so the driver must always press the start key as shown by the arrow in the figure. Turn off and stop the engine properly before getting off.

  On the other hand, when the idle stop condition at the time of delivery is applied, as shown by the symbol H, the engine automatically stops when the shift lever is put into the P range after the vehicle speed becomes zero and the vehicle stops. In the subsequent operations, there is no operation of restarting the engine, that is, no operation of stepping on the brake pedal, so the driver may forget to turn off the start key indicated by the arrow in the drawing. As a result, the driver may leave the vehicle for a long time to take a break or return home while in the H state when the engine is automatically stopped (for example, the start key is on and the battery is on). obtain. The reason why such a different result is obtained is that the engine restarts when the foot is released from the brake pedal in the conventional idle stop control, whereas the brake pedal is used in the idle stop control of the present invention. This is because the engine restarts when you step on.

  Furthermore, FIG. 7 shows another example of a series of operations performed by the driver at the time of break or warehousing in time series. The point different from the example in FIG. 6 is that, after the parking brake is pulled, the start key is turned off as indicated by the arrow in the drawing while the brake pedal is kept depressed before getting off. In this case, in the idle stop condition at the time of non-delivery, as indicated by the symbol J, the engine automatically stops when the vehicle speed becomes zero and the vehicle stops, and in the idle stop condition at the time of delivery, as indicated by the symbol K. The engine automatically stops when the shift lever is put into the P range after the vehicle speed becomes zero and the vehicle stops, as in the case of FIG. However, since the power (battery) is turned off when the start key indicated by the arrow in the drawing is turned off, the engine will not restart even if the foot is subsequently lowered from the brake pedal. In other words, the idle stop control is terminated while the engine is automatically stopped in both the home delivery and the non-home delivery. However, this does not cause any other problems.

  However, if the driver forgets to turn off the start key indicated by the arrow in the figure and remove it, the idle pedal stop condition during non-delivery will attempt to get off the brake pedal as indicated by the symbol L Since the engine restarts when the foot is lifted from the position, it is noticed that the idle stop control is still applied, and the engine is manually stopped again by turning off the start key. However, in the idle stop condition at the time of delivery, as described with reference to FIG. 6, after the engine is automatically stopped, there is no operation for restarting the engine, that is, no operation for depressing the brake pedal. There is a possibility that the user will not notice that it is still on and may leave the vehicle without removing the key.

  From the above, as shown in FIG. 8, after each detection value from the sensor or switch is input in step S21, it is determined in step S22 whether or not delivery is in progress. In such a case (NO at home delivery: NO), the process may return without performing anything as it is, that is, without executing the idle stop control. As a result, the engine does not automatically stop during non-delivery, so the driver gets off from the vehicle where the idle stop has been applied, for example, before the start of the delivery service or at the end of the delivery service. Problems such as leaving or returning over time (problems peculiar to idle stop control during home delivery pointed out in FIGS. 6 and 7) are avoided. In addition, the driver is urged to stop the engine properly.

  Note that steps S23 to S30 in the flowchart in FIG. 8 are the same as steps S11 to S18 in the flowchart in FIG.

  The embodiment described above is the best embodiment for carrying out the present invention, but it goes without saying that various modifications can be made without departing from the scope of the claims. For example, in the above embodiment, the shift lock mechanism 40 is an electric type, and the actuator 41 such as a solenoid operates according to a signal from the brake switch 51 or the brake operation amount sensor 52. The shift lock mechanism 40 may be mechanical. In that case, the shift lock mechanism 40 is not connected to switches or sensors, but is mechanically connected to the brake pedal via a wire or the like. When the brake pedal is depressed by a predetermined amount α or more, the movement preventing member such as a pin moves backward from the movement path of the shift lever in conjunction with the movement of the wire or the like, and the shift lock is released. Even in this case, it is possible to accurately reflect the driver's intention to release the shift lock and the intention to start, and as a result, it is possible to start the vehicle smoothly without any delay in response. .

  Further, in the above embodiment, whether or not the vehicle is being delivered is determined based on the presence or absence of an ON signal of the switch 56 during delivery, but instead, the navigation system 70 shown in FIG. 2 is used. It is also possible to determine whether the vehicle is being delivered to the home. That is, in the map information of the navigation system 70, as the geographical information for performing the delivery service, the delivery service area (wide area) of the own vehicle is input and recorded in advance, and the current position of the own vehicle is compared with the assigned area. When the vehicle is in the area, it is determined that the vehicle is being delivered. Alternatively, the home delivery service point (spot) of the own vehicle is input and recorded in advance in the map information of the navigation system 70 as geographical information for performing the delivery service, and the current position of the own vehicle is compared with the assigned point. Then, when the own vehicle is at the point in charge, it may be determined that the vehicle is being delivered to the home.

  Furthermore, it is possible to determine whether or not the vehicle is being delivered by using a clock equipped on the vehicle. In other words, the time for carrying out the delivery service of the vehicle (for example, from 8:00 am to noon and from 1 pm to 6 pm, etc.) is entered and recorded in advance in the memory of the control unit 100 as time information for performing the delivery service. The current time is compared with the assigned time, and when the current time is within the assigned time, it is determined that the vehicle is being delivered.

  In this way, using the navigation system 70 (when using geographic information) or the clock (when using temporal information) equipped on the vehicle, it is determined whether the vehicle is being used for delivery service. It is possible to automatically determine without depending on the driver's declaration.

  Moreover, in the said embodiment, although the automatic transmission 20 was a general stepped automatic transmission, it may replace with this and a non-transmission transmission. In this case, the hydraulically operated friction element is not for achieving the shift stage, but corresponds to a start clutch, a mode clutch, or the like used for connecting or disconnecting the power transmission path.

  As described above in detail with reference to specific examples, the present invention is an engine idle stop control suitable for a home delivery vehicle that does not make the driver feel uncomfortable and ensures good and smooth startability. Since the device is provided, it has wide industrial applicability in the technical field of engines or the technical field of environmentally friendly and low pollution of vehicles.

1 is a vehicle control system diagram according to an embodiment of the present invention. FIG. 2 is a layout diagram around an instrument panel in front of a driver seat of the vehicle. It is a flowchart which shows one example of the specific operation | movement of the idle stop control performed with the said vehicle. It is a time chart which shows an example of the specific operation | movement which a driver | operator performs at the time of signal waiting or traffic jam. It is a time chart which shows an example of the specific operation | movement which a driver | operator performs at the time of home delivery work. It is a time chart which shows one example of the specific operation | movement which a driver | operator performs at the time of a break or warehousing. It is a time chart which shows another example of the specific operation | movement which a driver | operator performs at the time of a break or warehousing. It is a flowchart which shows another example of the specific operation | movement of the idle stop control performed with the said vehicle.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Home delivery truck 10 Engine 20 Automatic transmission 21 Hydraulically operated friction element 30 Oil pump 40 Shift lock mechanism (selection prevention means)
41 Actuator for shift lock control (selection permission means)
51 Brake switch (Brake depressing operation detecting means)
52 Brake operation amount sensor (brake depression operation detection means)
53 Vehicle speed sensor (vehicle speed detection means)
54 Inhibitor switch (parking range selection detection means)
55 Parking Brake Switch 56 Delivery Switch (Delivery Use Declaration Method)
61 Idle stop lamp 62 Restart notification lamp 70 Navigation system (home delivery geographical information recording means)
100 idle stop control control unit (engine automatic stopping means, engine restarting means, engine automatic stop prohibiting means, home delivery use detecting means, second engine automatic stop means, second engine restart means, non-delivery operating means, home delivery time Information recording means)

Claims (3)

It has an automatic transmission that switches the state of the power transmission path according to the operating state of the hydraulically operated friction element, and when the engine is stopped, the oil pump that generates the operating oil pressure of the friction element is stopped. It is an idle stop control device, a home delivery use detecting means for detecting that the vehicle is used for home delivery, a range selecting means operated at the time of selection of the range, and a parking range being selected by the selecting means. An automatic engine stop that automatically stops the engine when the parking range selection detecting means to detect and the home delivery use detecting means detect the delivery of the vehicle and the parking range selection detecting means detects the parking range. A means for blocking the selection from the parking range to another range by the range selecting means, and a brake depressing operation. A brake depressing operation detecting means for detecting a value, a selection allowing means for releasing the operation of the selection preventing means when the detecting means detects that the brake is depressed by a predetermined amount or more, and the brake depressing operation detection And means for restarting the engine that has been automatically stopped by the engine automatic stop means when it is detected that the brake is depressed by a predetermined amount or more , and the home delivery use detecting means When the vehicle home delivery use is not detected, the engine automatic stop prohibition prohibits the engine automatic stop operation of the engine automatic stop means on condition that the parking range selection detection means detects the parking range selection. An idle stop control device for an engine characterized by comprising means . Vehicle speed detecting means for detecting the speed of the vehicle, and a second engine for automatically stopping the engine when the detecting means detects that the vehicle speed is equal to or lower than a predetermined vehicle speed and the brake depression operation detecting means detects the depression of the brake When a decrease in the brake depression amount is detected by the automatic stop means and the brake depression operation detection means or when the brake depression is no longer detected, the engine that has been automatically stopped by the second engine automatic stop means is restarted. When the delivery of the vehicle is not detected by the second engine restarting means to be started and the delivery using detection means, the second engine automatic stopping means and the second engine restarting means are replaced with the engine automatic stopping means and the engine restarting means. 2 engine according to claim 1, characterized in that is provided with a non-delivery time actuation means for actuating the engine restart means The idle stop control apparatus. Home delivery geographical information recording means for recording geographical information for performing home delivery services, home delivery time information recording means for recording time information for performing home delivery services, and home delivery operated at the time of reporting that the vehicle is being used for home delivery Use delivery means, and the home delivery use detection means compares the current position of the vehicle with the geographical information recorded in the delivery geographical information recording means, the current time and the time recorded in the delivery time information recording means. 3. The engine according to claim 1 , wherein the vehicle is used for home delivery based on at least one of comparison with target information and presence / absence of declaration by the reporting means. 4. Idle stop control device.

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