WO2013088476A1 - アイドリングストップ制御装置、車両、および、車両制御方法 - Google Patents
アイドリングストップ制御装置、車両、および、車両制御方法 Download PDFInfo
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- WO2013088476A1 WO2013088476A1 PCT/JP2011/007013 JP2011007013W WO2013088476A1 WO 2013088476 A1 WO2013088476 A1 WO 2013088476A1 JP 2011007013 W JP2011007013 W JP 2011007013W WO 2013088476 A1 WO2013088476 A1 WO 2013088476A1
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- Prior art keywords
- engine
- vehicle
- idling stop
- stopped
- brake
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- 238000000034 method Methods 0.000 title claims description 20
- 238000005086 pumping Methods 0.000 claims abstract description 72
- 238000001514 detection method Methods 0.000 abstract description 7
- 239000000446 fuel Substances 0.000 description 24
- 230000005540 biological transmission Effects 0.000 description 14
- 230000008859 change Effects 0.000 description 7
- 230000004048 modification Effects 0.000 description 7
- 238000012986 modification Methods 0.000 description 7
- 239000007858 starting material Substances 0.000 description 7
- 230000008569 process Effects 0.000 description 6
- 230000000994 depressogenic effect Effects 0.000 description 4
- 230000007246 mechanism Effects 0.000 description 4
- 238000004590 computer program Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 125000002066 L-histidyl group Chemical group [H]N1C([H])=NC(C([H])([H])[C@](C(=O)[*])([H])N([H])[H])=C1[H] 0.000 description 1
- 230000007175 bidirectional communication Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M3/00—Idling devices for carburettors
- F02M3/02—Preventing flow of idling fuel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N11/00—Starting of engines by means of electric motors
- F02N11/08—Circuits or control means specially adapted for starting of engines
- F02N11/0814—Circuits or control means specially adapted for starting of engines comprising means for controlling automatic idle-start-stop
- F02N11/0818—Conditions for starting or stopping the engine or for deactivating the idle-start-stop mode
- F02N11/0822—Conditions for starting or stopping the engine or for deactivating the idle-start-stop mode related to action of the driver
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W30/00—Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of vehicle sub-units
- B60W30/18—Propelling the vehicle
- B60W30/18009—Propelling the vehicle related to particular drive situations
- B60W30/18072—Coasting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W30/00—Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of vehicle sub-units
- B60W30/18—Propelling the vehicle
- B60W30/18009—Propelling the vehicle related to particular drive situations
- B60W30/18109—Braking
- B60W30/18136—Engine braking
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D17/00—Controlling engines by cutting out individual cylinders; Rendering engines inoperative or idling
- F02D17/04—Controlling engines by cutting out individual cylinders; Rendering engines inoperative or idling rendering engines inoperative or idling, e.g. caused by abnormal conditions
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D29/00—Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto
- F02D29/02—Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto peculiar to engines driving vehicles; peculiar to engines driving variable pitch propellers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2540/00—Input parameters relating to occupants
- B60W2540/12—Brake pedal position
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
- B60Y2300/00—Purposes or special features of road vehicle drive control systems
- B60Y2300/46—Engine injection cut at coasting
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N2200/00—Parameters used for control of starting apparatus
- F02N2200/10—Parameters used for control of starting apparatus said parameters being related to driver demands or status
- F02N2200/102—Brake pedal position
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
Definitions
- the present invention relates to an idling stop control device mounted on a vehicle including an engine and a brake, a vehicle including the engine and the brake, and a vehicle control method for controlling the vehicle including the engine and the brake.
- idling stops are known in which the engine is stopped when the vehicle is stopped and the engine is restarted when the vehicle is started, thereby suppressing fuel consumption and emission of exhaust gas while the vehicle is stopped.
- the idling stop is preferably executed when the vehicle is stopped for a relatively long time such as when the signal is stopped.
- the stop time is short such as when there is a traffic jam, there is a problem that the engine is repeatedly stopped and started.
- Cited Document 1 in an engine control device that stops an engine when a predetermined engine stop condition such as a brake operation is satisfied, the vehicle speed is less than a predetermined value and a brake pumping operation is not detected.
- a technique for prohibiting the engine from being stopped is disclosed.
- the type of stop operation by the driver such as foot brake, side brake, gear change, etc. is detected, and the expected stop time corresponding to the type of stop operation set in advance by the type of stop operation is obtained.
- Technology is disclosed.
- the above technique has a problem that, for example, idling stop is not executed when the signal stops without pumping the brake.
- idling stop is not executed when the signal stops without pumping the brake.
- it is not easy to predict the length of stop time from foot brake, side brake, and gear change.
- there is still room for improvement in the technology for performing the idling stop.
- the present invention has been made in order to solve the above-described problems, and aims to further improve the fuel consumption of a vehicle by devising the content of the idling stop control in a vehicle having an idling stop function. .
- the present invention can be realized as the following aspects or application examples.
- An idling stop control device mounted on a vehicle equipped with an engine and a brake, A pumping operation detector for detecting the pumping operation of the brake; An engine control unit for controlling start and stop of the engine, The engine control unit, when the number of pumping operations in a deceleration period before the vehicle stops is less than a predetermined value, stops the engine after a predetermined time has elapsed since the vehicle stopped; Stop control device.
- the engine when the number of pumping operations is less than a predetermined value during the deceleration period before the vehicle stops, the engine is idle until a predetermined time elapses after the vehicle stops. Since the engine is stopped after the elapse of time, the fuel efficiency of the vehicle can be improved.
- the engine control unit is an idling stop control device that stops the engine before the predetermined time elapses after the vehicle stops when the number of pumping operations in the deceleration period is a predetermined value or more.
- the engine control unit is an idling stop control device that stops the engine substantially simultaneously with stopping of the vehicle when the number of pumping operations in the deceleration period is equal to or greater than a predetermined value.
- the engine control unit since the engine control unit does not stop the engine when the vehicle does not satisfy the predetermined engine stop condition, it is possible to suppress the occurrence of problems due to idling stop.
- a vehicle control method for controlling a vehicle including an engine and a brake, (A) detecting a pumping operation of the brake; (B) when the number of pumping operations in the deceleration period before the vehicle stops is less than a predetermined value, stopping the engine after a predetermined time has elapsed since the vehicle stopped. Vehicle control method.
- the engine when the number of pumping operations in the deceleration period before stopping is less than a predetermined value for the vehicle, the engine is in an idling state until a predetermined time elapses after the vehicle is stopped. Therefore, the fuel consumption of the vehicle can be improved.
- a computer program for causing a computer to implement functions corresponding to the steps of a control system including the above-described idling stop control device, an automobile, a manufacturing method of the idling stop control device, a manufacturing apparatus, and a vehicle control method It can be realized in the form of a recorded recording medium or the like.
- FIG. 1 is an explanatory diagram showing a configuration of an automobile 10 as an embodiment of the present invention.
- the automobile 10 is a vehicle equipped with an idling stop function.
- the automobile 10 includes an engine 100, an automatic transmission 150, a differential gear 200, drive wheels 250, a starter 300, an alternator 350, a battery 400, and an electronic control unit (ECU) 500. ing.
- ECU electronice control unit
- Engine 100 is an internal combustion engine that generates power by burning fuel such as gasoline or light oil.
- the power of the engine 100 is transmitted to the automatic transmission 150 and also transmitted to the alternator 350 via the drive mechanism 340.
- the output of the engine 100 is changed by the electronic control unit 500 according to the amount of depression of the accelerator pedal by the driver.
- the automatic transmission 150 automatically changes the gear ratio (so-called shift change).
- the power (rotation speed / torque) of the engine 100 is shifted by the automatic transmission 150 and transmitted to the left and right drive wheels 250 through the differential gear 200 as desired rotation speed / torque.
- the motive power of the engine 100 is transmitted to the drive wheel 250 through the automatic transmission 150 while being changed according to the depression amount of the accelerator pedal, and the vehicle (the automobile 10) is accelerated and decelerated.
- the starter 300 is a cell motor that starts the engine 100 with electric power supplied from the battery 400. Normally, when a driver operates an ignition switch (not shown) when starting the operation of a stopped automobile, the starter 300 is started and the engine 100 is started. The starter 300 may be used when the engine 100 is restarted from the idling stop state.
- the idling stop state refers to a state where the engine 100 is stopped by idling stop control described later.
- Alternator 350 generates power using a part of the power of engine 100.
- the generated electric power is used for charging the battery 400 via an inverter (not shown).
- the alternator 350 may be used when the engine 100 is restarted from the idling stop state.
- the drive mechanism 340 is a mechanism unit that transmits the power of the engine 100 to the alternator 350, and here, a belt drive is adopted.
- the battery 400 is a lead storage battery as a DC power source with a voltage of 14 V, and supplies power to the auxiliary machinery 450.
- the automobile 10 includes a lighting system, a wiper, an air conditioner (A / C), and the like as auxiliary machinery 450.
- the electronic control unit 500 includes an idling stop ECU 510, an engine ECU 520, and a transmission ECU 530.
- Each of the ECUs 510, 520, and 530 is configured by a computer that includes a CPU, a ROM, and a RAM.
- the electronic control unit 500 may include an ECU other than those described above, such as an accessory drive motor ECU for driving the accessories 450 when the engine 100 is stopped.
- Each of the ECUs 510, 520, and 530 is supplied with power from the battery 400.
- the electronic control unit 500 corresponds to the “idling stop control device” in the claims.
- the idling stop ECU 510 executes idling stop control.
- the idling stop control is a control for stopping or restarting the engine when a predetermined condition is satisfied. Details of the idling stop control will be described later with reference to FIGS.
- the idling stop ECU 510 is connected to the engine ECU 520 and the transmission ECU 530 via a signal line so as to be capable of bidirectional communication.
- the idling stop ECU 510 detects a wheel speed sensor 820 that detects the rotational speed of the drive wheel 250, a brake pedal sensor 840 that detects the amount of depression of the brake pedal as a brake amount, and detects the amount of depression of the accelerator pedal as an accelerator opening.
- An accelerator opening sensor 860 is connected to each other via a signal line.
- the idling stop ECU 510 stores a computer program for causing the CPU to execute idling stop control and a computer program for causing the CPU to function as the pumping operation detection unit 511 in the ROM.
- the pumping operation detector 511 detects a brake pumping operation by the driver in the idling stop control. A method for detecting the pumping operation of the brake will be described later.
- the idling stop ECU 510 includes a counter for counting the number of pumping operations detected by the pumping operation detecting unit 511 during the deceleration period Td (FIG. 2) before the vehicle stops.
- the number of pumping operations counted by the idling stop ECU 510 is also referred to as a count value Nc.
- the idling stop ECU 510 changes the engine stop timing after stopping according to the count value Nc.
- the engine ECU 520 is connected with a wheel speed sensor 820, an accelerator opening sensor 860, and an engine speed sensor (not shown) via signal lines.
- Engine ECU 520 controls the operating state of engine 100 by adjusting the fuel injection amount, throttle opening, and the like based on the information detected by these sensors. Further, when the vehicle is stopped, fuel injection to engine 100 is stopped and operation of engine 100 is stopped in accordance with a request from idling stop ECU 510. Further, when the vehicle starts, engine 100 is started by controlling starter 300 or alternator 350 in accordance with a request from idling stop ECU 510.
- the engine ECU 520 corresponds to an “engine control unit” in the claims.
- a wheel speed sensor 820, an accelerator opening sensor 860, and a shift position sensor (not shown) are connected to the transmission ECU 530 via signal lines.
- Transmission ECU 530 controls a hydraulic actuator (not shown) based on the information detected by these sensors, and changes the gear ratio of automatic transmission 150.
- FIG. 2 is an explanatory diagram for explaining the content of the idling stop control.
- the idling stop ECU 510 determines whether the stop time after the deceleration period Td is long (hereinafter also referred to as “long-time stop”) or a short period (hereinafter “long-time stop”) depending on the number of brake pumping operations in the deceleration period Td before the vehicle 10 stops. It is also called “short stop”.
- the pumping operation is an operation in which the driver depresses the brake pedal during deceleration.
- idling stop control refers to control that suppresses fuel consumption by stopping an engine that is idling when the vehicle is decelerated or stopped.
- the stop time is short (for example, about 5 [s])
- the fuel consumption required for restarting the engine is larger than the fuel consumption reduced by stopping the engine, resulting in the fuel consumption. May increase. Therefore, in the idling stop control, it is estimated whether the stop after the deceleration period Td is a long stop (for example, about 10 [s] to several [min]) or a short stop (for example, about 5 [s] or less). It is preferable to stop the engine only when the vehicle is stopped for a long time.
- the long stop includes many stops that require the stop position to be adjusted to a specific position, such as stop by a signal or stop in parking.
- the specific position here is, for example, a position determined by a white line on the road or a vehicle ahead. Therefore, in the deceleration period Td before stopping for a long time, a fine braking operation, that is, a pumping operation of the brake occurs when the driver tries to adjust the stop position of the automobile to the specific position.
- the short-time stop does not require the stop position to be adjusted to a specific position like a stop due to a traffic jam, and includes, for example, a stop for adjusting the speed of an automobile to an external environment including a preceding vehicle. Therefore, in the deceleration period Td before the stop for a short time, for example, the driver performs braking for the purpose of speed adjustment, and therefore basically does not require a pumping operation. From these facts, in the idling stop control of the present embodiment, it is estimated from the number of pumping operations during the deceleration period Td whether the vehicle is stopped for a long time or for a short time. Stop. On the other hand, in the case of a short stop, the engine is not stopped even if the vehicle stops.
- FIGS. 3 and 4 are flowcharts for explaining the flow of idling stop control.
- the idling stop ECU 510 repeatedly executes the routines of FIGS. 3 and 4 at a predetermined interval. In the following description, it is assumed that the automobile 10 is in a traveling state.
- the idling stop ECU 510 detects accelerator OFF from the accelerator opening detected by the accelerator opening sensor 860.
- step S102 When accelerator OFF is not detected (step S102: NO), that is, a state where the accelerator pedal is depressed (hereinafter also referred to as “accelerator ON”) is detected from the accelerator opening detected by the accelerator opening sensor 860. In this case, it is considered that the automobile 10 is in a traveling state and has not entered the deceleration period Td (FIG. 2). Therefore, idling stop ECU 510 repeats step S101 and step S102 until it detects accelerator OFF.
- the pumping operation detection unit 511 of the idling stop ECU 510 detects a brake pumping operation (step S103).
- the pumping operation detection unit 511 detects the pumping operation using the change in the brake amount detected by the brake pedal sensor 840. Specifically, the pumping operation detection unit 511 switches the brake amount when the brake pedal is depressed (hereinafter also referred to as “brake ON”) to the state where the brake pedal is not depressed (hereinafter also referred to as “brake OFF”).
- the pumping operation is detected by detecting the change edge.
- the pumping operation may be detected when the time until the brake OFF is detected again is shorter than a predetermined time after detecting the brake OFF.
- the pumping operation may be detected using, for example, a change in brake hydraulic pressure or a physical displacement of the brake pedal.
- step S103 YES
- step S104 the idling stop ECU 510 skips the process of step S104.
- step S105 the idling stop ECU 510 detects the accelerator ON from the accelerator opening detected by the accelerator opening sensor 860 (step S105).
- step S105 YES
- step S105: NO since the accelerator remains OFF, it is considered that the deceleration period Td of the automobile 10 continues. Therefore, the idling stop ECU 510 determines whether or not the automobile 10 has stopped (step S106). The idling stop ECU 510 determines whether or not the automobile 10 is stopped using the rotational speed of the driving wheel 250 detected by the wheel speed sensor 820.
- step S106 NO
- the pumping operation detection unit 511 detects the pumping operation of the brake again (step S103).
- the idling stop ECU 510 determines whether or not the count value Nc indicating the number of pumping operations performed during the deceleration period Td is larger than the threshold value X (FIG. 4, step S107).
- step S109: YES it is determined whether or not an engine stop condition for permitting the stop of the engine 100 is satisfied (step S109). As a result of the determination, when the automobile 10 satisfies the engine stop condition (step S109: YES), the idling stop ECU 510 stops the engine 100 (step S110).
- the idling stop ECU 510 delays the stop of the engine 100 after stopping when the stop of the automobile 10 is estimated to be stopped for a short time. That is, the engine 100 is set to an idling state during the standby time Tw after the automobile 10 stops, and then the engine 100 is stopped.
- the waiting time Tw can be set arbitrarily.
- the waiting time Tw corresponds to “predetermined time” in the claims.
- the engine stop condition in step S109 is a condition for permitting the engine 100 to stop, and can be arbitrarily set. Examples of the engine stop condition include that the shift position is in a predetermined range, that the capacity of the battery 400 is sufficient, and that the brake is ON.
- idling stop ECU 510 requests engine ECU 520 to stop engine 100 when engine 100 is stopped. Receiving the request, engine ECU 520 cuts the supply of fuel to engine 100 and stops engine 100.
- step S107 when the count value Nc is larger than the threshold value X (step S107: YES), it is estimated that the automobile 10 is stopped for a long time. Therefore, the idling stop ECU 510 determines whether the engine stop condition is satisfied without providing a delay time (step S109). As a result of the determination, when the automobile 10 satisfies the engine stop condition (step S109: YES), the idling stop ECU 510 stops the engine 100 (step S110). Thus, the idling stop ECU 510 stops the engine 100 almost simultaneously with the stop of the automobile 10 when the stop of the automobile 10 is estimated to be stopped for a long time.
- the idling stop ECU 510 stops the engine 100 until a start operation by the driver is detected (step S111: NO).
- the start operation is an operation performed by the driver to start the automobile 10, and examples thereof include brake OFF, accelerator ON, shift position change, and the like.
- the idling stop ECU 510 detects a start operation (step S111: YES)
- the engine 100 is restarted (step S112).
- idling stop ECU 510 requests engine ECU 520 to restart engine 100. Receiving the request, engine ECU 520 drives starter 300 or alternator 350 to restart engine 100. Thereafter, the process returns to step S101.
- step S109 when the engine stop condition is not satisfied (step S109: NO), the idling stop ECU 510 determines whether or not the engine stop condition is satisfied until the start operation by the driver is detected (step S113: NO). Is performed (step S109). If a start operation by the driver is detected during this process (step S113: YES), the process returns to 101.
- the above is the flow of idling stop control.
- the automobile 10 waits after the automobile 10 stops when the number of pumping operations is less than a predetermined value in the deceleration period Td before stopping. Since the engine 100 is stopped after Tw has elapsed, the fuel consumption of the automobile 10 can be improved. As described above, the number of pumping operations in the deceleration period Td is considered to have a correlation with the subsequent stop time. Therefore, when it is estimated from the number of pumping operations that the vehicle is stopped for a long time, the fuel consumption during stopping can be suppressed by stopping the engine immediately after the vehicle stops.
- the engine when it is estimated that the vehicle is stopped for a short time, the engine is not stopped and is brought into an idling state, so that fuel consumption required at the time of restart can be eliminated and an increase in fuel consumption can be suppressed.
- the idling stop control of the present embodiment when it is estimated that the vehicle stops for a short time, the engine 100 is stopped after the standby time Tw elapses after the vehicle stops. If the vehicle is stopped for a short time such as shorter than Tw, the engine can be in an idling state during that time.
- the engine can be stopped thereafter. Accordingly, even when the actual stop is a long stop, the occurrence of unnecessary idling can be suppressed, and the fuel consumption can be improved.
- Second embodiment In the second embodiment, a configuration in which the standby time Tw changes according to the count value Nc in the idling stop control (FIGS. 3 and 4) will be described. Since the entire configuration of the automobile 10 is the same as that of the first embodiment, description thereof is omitted.
- the idling stop ECU 510 according to the second embodiment stores an Nc-Tw correspondence table showing the correspondence between the count value Nc and the standby time Tw in the ROM.
- FIG. 5 is an explanatory diagram for explaining the contents of the Nc-Tw correspondence table.
- the horizontal axis in FIG. 5 indicates the count value Nc, and the vertical axis indicates the standby time Tw.
- the Nc-Tw correspondence table is configured such that the standby time Tw decreases as the count value Nc increases. For example, when the count value Nc is 0 [times], the standby time Tw is 5 [s], and when the count value Nc is 5 [times], the standby time Tw is 1 [s]. ing.
- the idling stop ECU 510 refers to the Nc-Tw correspondence table in step S108 (FIG. 4), and first calculates the standby time Tw from the count value Nc. Thereafter, it is determined whether or not the calculated standby time Tw has elapsed.
- the other processes are the same as the idling stop control described in the first embodiment.
- the standby time Tw becomes shorter as the number of pumping operations in the deceleration period Td increases when it is estimated that the vehicle stops for a short time.
- the fuel consumption of the vehicle can be improved. Even if this is a case where the number of pumping operations in the deceleration period Td is small and it is estimated that the vehicle is stopped for a short time, the possibility that the actual stop will be stopped for a long time increases as the number of pumping increases. Therefore, by shortening the waiting time Tw, fuel consumption while the vehicle is stopped can be further suppressed.
- the idling stop ECU 510 determines whether or not the automobile 10 is stopped in step S106 (FIG. 3) of the idling stop control.
- the speed of the automobile 10 is a predetermined speed (> 0). It is good also as a structure which determines whether it became below. That is, the idling stop ECU 510 may be configured to stop the engine 100 while the automobile 10 is not stopped.
- the idling stop ECU 510 may treat the waiting time Tw as an elapsed time after the speed of the automobile 10 reaches a predetermined speed, or treat it as an elapsed time since the vehicle stopped. Good.
- step S107 (FIG. 4) of the idling stop control
- the engine 100 is stopped almost simultaneously with the stop of the automobile 10.
- a standby time may be provided between the stop of the automobile 10 and the stop of the engine 100.
- the waiting time at this time is preferably shorter than the waiting time Tw when it is estimated that the vehicle stops for a short time. Even in this case, when it is estimated that the vehicle stops for a long time, the engine stops earlier than the case where it is estimated that the vehicle stops for a short time, so that the fuel consumption can be improved.
- step S107 it is determined whether or not the count value Nc is larger than the threshold value X in step S107 (FIG. 4) of the idling stop control.
- the Nc-Tw correspondence table described in the second embodiment If the correspondence relationship is set so that the standby time Tw becomes 0 [s] when the count value Nc is equal to or greater than a predetermined value (for example, 6 [times]), the process of step S107 is omitted and all the steps go through step S108. It can be set as the structure to do. Even in this case, when the vehicle is stopped for a long time, the idling stop ECU 510 refers to the Nc-Tw correspondence table and calculates 0 [s] as the standby time Tw. Can be made.
- step S109 it is determined whether or not the engine stop condition is satisfied in step S109 (FIG. 4) of the idling stop control. However, step S109 may be omitted.
- Modification 5 In the said Example, although the motor vehicle 10 was illustrated as an example of a vehicle, a vehicle is not limited to a motor vehicle and may be other than motor vehicles, such as a train. Moreover, in the said Example, although the motor vehicle 10 was provided with the automatic transmission 150, the motor vehicle 10 may be provided with the manual transmission.
- Modification 6 In the above embodiment, a part of the function realized by software may be realized by hardware (for example, an integrated circuit), or a part of the function realized by hardware may be realized by software. .
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- General Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
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- Control Of Vehicle Engines Or Engines For Specific Uses (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
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Abstract
Description
エンジンとブレーキを備える車両に搭載されるアイドリングストップ制御装置であって、
前記ブレーキのポンピング操作を検出するポンピング操作検出部と、
前記エンジンの始動や停止を制御するエンジン制御部と、を備え、
前記エンジン制御部は、前記車両が停車する前の減速期間における前記ポンピング操作の回数が所定値よりも少ない場合、前記車両が停車してから所定の時間が経過した後に前記エンジンを停止する、アイドリングストップ制御装置。
適用例1に記載のアイドリングストップ制御装置において、
前記所定の時間は、前記減速期間における前記ポンピング操作の回数が多いほど短くなるように設定されている、アイドリングストップ制御装置。
適用例1または適用例2に記載のアイドリングストップ制御装置において、
前記エンジン制御部は、前記減速期間における前記ポンピング操作の回数が所定値以上の場合、前記車両が停車してから前記所定の時間が経過する前に前記エンジンを停止する、アイドリングストップ制御装置。
適用例3に記載のアイドリングストップ制御装置において、
前記エンジン制御部は、前記減速期間における前記ポンピング操作の回数が所定値以上の場合、前記車両の停車とほぼ同時に前記エンジンを停止する、アイドリングストップ制御装置。
適用例1ないし適用例4のいずれかに記載のアイドリングストップ制御装置において、
前記エンジン制御部は、前記減速期間における前記ポンピング操作の回数が所定値よりも少ない場合、前記車両が停車してから所定の時間が経過し、かつ、前記車両が所定のエンジン停止条件を満たしている場合に、前記エンジンを停止する、アイドリングストップ制御装置。
エンジンとブレーキを備える車両であって、
前記ブレーキのポンピング操作を検出するポンピング操作検出部と、
前記エンジンの始動や停止を制御するエンジン制御部と、を備え、
前記エンジン制御部は、前記車両が停車する前の減速期間における前記ポンピング操作の回数が所定値よりも少ない場合、前記車両が停車してから所定の時間が経過した後に前記エンジンを停止する、車両。
エンジンとブレーキを備える車両を制御する車両制御方法であって、
(a)前記ブレーキのポンピング操作を検出する工程と、
(b)前記車両が停車する前の減速期間における前記ポンピング操作の回数が所定値よりも少ない場合、前記車両が停車してから所定の時間が経過した後に前記エンジンを停止する工程と、を備える車両制御方法。
図1は、本発明の一実施例としての自動車10の構成を示す説明図である。自動車10は、アイドリングストップ機能を搭載した車両である。自動車10は、エンジン100と、自動変速機150と、ディファレンシャルギア200と、駆動輪250と、スタータ300と、オルタネータ350と、バッテリ400と、電子制御ユニット(ECU:Electrical Control Unit)500とを備えている。
第2実施例では、アイドリングストップ制御(図3、4)において、待機時間Twがカウント値Ncに応じて変化する構成について説明する。自動車10の全体構成は、第1実施例と同様のため説明を省略する。第2実施例のアイドリングストップECU510は、カウント値Ncと待機時間Twとの対応関係を示したNc-Tw対応テーブルをROMに格納している。
なお、この発明は上記の実施例や実施形態に限られるものではなく、その要旨を逸脱しない範囲において種々の態様において実施することが可能であり、例えば次のような変形も可能である。
上記実施例では、アイドリングストップ制御のステップS106(図3)において、アイドリングストップECU510は、自動車10が停車しているか否かの判定をおこなっているが、自動車10の速度が所定速度(>0)以下となったか否かの判定をおこなう構成としてもよい。すなわち、アイドリングストップECU510は、自動車10が停車していない状態でエンジン100を停止させる構成としてもよい。このとき、ステップS108において、アイドリングストップECU510は、待機時間Twを自動車10の速度が所定速度となってからの経過時間として取り扱う構成としてもよいし、停車してからの経過時間として取り扱う構成としてもよい。
上記実施例では、アイドリングストップ制御のステップS107(図4)において、自動車10の停車が長時間停車であると推定されると、自動車10の停車とほぼ同時にエンジン100を停止させているが、長時間停車と推定された場合にも自動車10の停車とエンジン100の停止との間に待機時間を設ける構成としてもよい。このときの待機時間は、短時間停車と推定された場合における待機時間Twよりも短いことが好ましい。この場合であっても、長時間停車と推定される場合には、短時間停車と推定される場合よりも早くエンジンが停止するため、燃費の向上を図ることができる。
上記実施例では、アイドリングストップ制御のステップS107(図4)において、カウント値Ncが閾値Xよりも大きいか否かの判定をおこなっているが、第2実施例で説明したNc-Tw対応テーブルにおいて、カウント値Ncが所定値(例えば6〔回〕)以上のときに待機時間Twが0〔s〕になるように対応関係を設定すれば、ステップS107の処理を省略して全てステップS108を経由する構成とすることができる。この場合であっても、長時間停車の場合には、アイドリングストップECU510は、Nc-Tw対応テーブルを参照して、待機時間Twとして0〔s〕を算出するため、停車後速やかにエンジンを停止させることができる。
上記実施例では、アイドリングストップ制御のステップS109(図4)において、エンジン停止条件を満たしているか否かの判定をおこなっているが、ステップS109を省略してもよい。
上記実施例では、車両の一例として自動車10を例示したが、車両は、自動車に限定されず、電車など自動車以外であってもよい。また、上記実施例では、自動車10は自動変速機150を備えているが、自動車10は、マニュアルトランスミッションを備えていてもよい。
上記実施例においてソフトウェアで実現されている機能の一部をハードウェア(例えば集積回路)で実現してもよく、あるいは、ハードウェアで実現されている機能の一部をソフトウェアで実現してもよい。
100…エンジン
150…自動変速機
200…ディファレンシャルギア
250…駆動輪
300…スタータ
340…駆動機構
350…オルタネータ
400…バッテリ
450…補機類
500…電子制御ユニット
510…アイドリングストップECU
511…ポンピング操作検出部
520…エンジンECU
530…トランスミッションECU
820…車輪速センサ
840…ブレーキペダルセンサ
860…アクセル開度センサ
Claims (7)
- エンジンとブレーキを備える車両に搭載されるアイドリングストップ制御装置であって、
前記ブレーキのポンピング操作を検出するポンピング操作検出部と、
前記エンジンの始動や停止を制御するエンジン制御部と、を備え、
前記エンジン制御部は、前記車両が停車する前の減速期間における前記ポンピング操作の回数が所定値よりも少ない場合、前記車両が停車してから所定の時間が経過した後に前記エンジンを停止する、アイドリングストップ制御装置。 - 請求項1に記載のアイドリングストップ制御装置において、
前記所定の時間は、前記減速期間における前記ポンピング操作の回数が多いほど短くなるように設定されている、アイドリングストップ制御装置。 - 請求項1または請求項2に記載のアイドリングストップ制御装置において、
前記エンジン制御部は、前記減速期間における前記ポンピング操作の回数が所定値以上の場合、前記車両が停車してから前記所定の時間が経過する前に前記エンジンを停止する、アイドリングストップ制御装置。 - 請求項3に記載のアイドリングストップ制御装置において、
前記エンジン制御部は、前記減速期間における前記ポンピング操作の回数が所定値以上の場合、前記車両の停車とほぼ同時に前記エンジンを停止する、アイドリングストップ制御装置。 - 請求項1ないし請求項4のいずれかに記載のアイドリングストップ制御装置において、
前記エンジン制御部は、前記減速期間における前記ポンピング操作の回数が所定値よりも少ない場合、前記車両が停車してから所定の時間が経過し、かつ、前記車両が所定のエンジン停止条件を満たしている場合に、前記エンジンを停止する、アイドリングストップ制御装置。 - エンジンとブレーキを備える車両であって、
前記ブレーキのポンピング操作を検出するポンピング操作検出部と、
前記エンジンの始動や停止を制御するエンジン制御部と、を備え、
前記エンジン制御部は、前記車両が停車する前の減速期間における前記ポンピング操作の回数が所定値よりも少ない場合、前記車両が停車してから所定の時間が経過した後に前記エンジンを停止する、車両。 - エンジンとブレーキを備える車両を制御する車両制御方法であって、
(a)前記ブレーキのポンピング操作を検出する工程と、
(b)前記車両が停車する前の減速期間における前記ポンピング操作の回数が所定値よりも少ない場合、前記車両が停車してから所定の時間が経過した後に前記エンジンを停止する工程と、を備える車両制御方法。
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CN201180075408.XA CN103975146B (zh) | 2011-12-15 | 2011-12-15 | 怠速停止控制装置、车辆以及车辆控制方法 |
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JP5744936B2 (ja) * | 2013-02-28 | 2015-07-08 | 本田技研工業株式会社 | 車両の停止制御装置 |
JP5780256B2 (ja) * | 2013-03-21 | 2015-09-16 | トヨタ自動車株式会社 | 車両の制御装置 |
US10458382B2 (en) * | 2015-04-15 | 2019-10-29 | Ford Global Technologies, Llc | Auto stop parameter threshold adjustment |
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