WO2012011568A1 - エンジン自動停止装置及び自動停止方法 - Google Patents
エンジン自動停止装置及び自動停止方法 Download PDFInfo
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- WO2012011568A1 WO2012011568A1 PCT/JP2011/066702 JP2011066702W WO2012011568A1 WO 2012011568 A1 WO2012011568 A1 WO 2012011568A1 JP 2011066702 W JP2011066702 W JP 2011066702W WO 2012011568 A1 WO2012011568 A1 WO 2012011568A1
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- internal combustion
- combustion engine
- automatic stop
- vehicle
- satisfied
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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
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D28/00—Programme-control of engines
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- 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
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- 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
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- 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
- F02N11/0833—Vehicle conditions
- F02N11/0837—Environmental conditions thereof, e.g. traffic, weather or road conditions
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- 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
- F02N2200/12—Parameters used for control of starting apparatus said parameters being related to the vehicle exterior
- F02N2200/124—Information about road conditions, e.g. road inclination or surface
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- 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
- This invention relates to automatic stop and restart of an internal combustion engine for a vehicle.
- Japanese Patent Laid-Open No. 2009-14193 issued by the Japan Patent Office in 2008 proposes an automatic engine stop device that automatically stops an internal combustion engine when a predetermined condition is satisfied while the vehicle is running or stopped.
- This prior art proposes prohibiting the automatic stop of the internal combustion engine in order to prevent the vehicle from moving backward when the ascending slope of the runway is a predetermined value or more.
- the internal combustion engine in order to increase the chance of automatic stop of the internal combustion engine, the internal combustion engine is automatically stopped when a predetermined condition is satisfied not only when the vehicle is stopped but also during traveling.
- a predetermined condition For example, in a vehicle equipped with a torque converter and an automatic transmission, a sense of deceleration increases because creep torque cannot be obtained. In this case, the greater the gradient, the greater the feeling of deceleration felt by the driver, and as a result, the driver may feel uncomfortable.
- an object of the present invention is to reduce the uncomfortable feeling given to the driver by the automatic stop of the internal combustion engine on a slope.
- the present invention provides a second automatic stop condition when the first automatic stop condition is satisfied while the vehicle using the internal combustion engine as a driving power source is stopped, or while the vehicle is traveling. This is applied to an engine automatic stop device that automatically stops the internal combustion engine when the above is established.
- the first automatic stop condition requires that the road gradient is below the first gradient threshold
- the second automatic stop condition requires that the road gradient is below the second gradient threshold.
- the second gradient threshold is set to a value smaller than the first gradient threshold.
- FIG. 1 is a schematic configuration diagram of an automatic stop device for an internal combustion engine according to a first embodiment of the present invention.
- FIG. 2A-2D are timing charts for explaining the operation control status of the internal combustion engine by the automatic stop device.
- FIG. 3 is a flow chart for explaining an automatic stop routine of the internal combustion engine while the vehicle is running, which is executed by the controller according to the first embodiment of the present invention.
- FIG. 4 is a flowchart for explaining an automatic stop routine of the stopped internal combustion engine executed by the controller.
- FIG. 5 is FIG. Fig. 2 shows a second embodiment of the invention similar to 1;
- FIG. 6A-6G are timing charts for explaining the operation control status of the internal combustion engine of the automatic stop device according to the second embodiment of the present invention.
- a multi-cylinder internal combustion engine 2 mounted on a vehicle 1B includes a fuel injector 3 and a spark plug 4 for each cylinder.
- the fuel supplied from the fuel injector 3 is ignited by the spark plug 4 and burned, and the combustion pressure is converted into rotational force, that is, power.
- the internal combustion engine 2 is connected to an automatic transmission 32 via a torque converter 31.
- the power transmitted from the internal combustion engine 2 to the automatic transmission 32 is transmitted to the drive wheels 10 via the drive rod 8 and the final gear 9.
- the vehicle 1B is a so-called automatic vehicle.
- the torque converter 31 transmits power via a fluid between the pump impeller and the turbine runner.
- the torque converter 31 is provided with a lockup clutch.
- the lock-up clutch directly connects the pump impeller and the turbine runner when engaged, and transmits power directly between the pump impeller and the turbine runner without any fluid. Thereby, the fuel consumption accompanying the drive of a vehicle is suppressed.
- the pump impeller and the turbine runner are allowed to rotate relative to each other, and power is transmitted between the pump impeller and the turbine runner exclusively through the fluid.
- the vibration of the internal combustion engine 2 is easily transmitted to the vehicle via the lockup clutch. Therefore, at a low speed, the lockup clutch is released to release the direct connection between the pump impeller and the turbine runner.
- a vehicle speed VSP that is a boundary between engagement and release of the lockup clutch is referred to as a lockup off vehicle speed.
- the vehicle 1 includes a battery 21.
- the electric power of the battery 21 is supplied to the starter motor 23 via the starter motor driving relay 22.
- the starter motor 23 performs cranking of the internal combustion engine 2 by supplying power and starts the internal combustion engine 2.
- the electric power of the battery 21 is supplied to the first electric load 26 or directly to the second electric load 27 via the DC / DC converter 25.
- the second electric load 27 includes, for example, a headlight.
- the DC / DC converter 25 adjusts the voltage of the battery 21 to a constant voltage.
- the vehicle 1 also includes an alternator 24 that is driven by the internal combustion engine 2 to generate electric power.
- the AC power generated by the alternator 24 is converted to DC by a built-in inverter and then stored in the battery 21.
- the fuel injection of the fuel injector 3 of the internal combustion engine 2, the ignition of the spark plug 4, and the operation of the starter motor 23 via the starter motor drive relay 22 are respectively controlled by the engine controller 11.
- the engine controller 11 includes a microcomputer having a central processing unit (CPU), a read only memory (ROM), a random access memory (RAM), and an input / output interface (I / O interface). It is also possible to configure the engine controller 11 with a plurality of microcomputers.
- CPU central processing unit
- ROM read only memory
- RAM random access memory
- I / O interface input / output interface
- the engine controller 11 includes a brake fluid pressure signal detected by the brake switch 15 detected by the brake switch 15, a crank angle signal detected by the crank angle sensor 16, a vehicle speed VSP detected by the vehicle speed sensor 17, and a vehicle speed detected by the tilt sensor 18.
- a signal of a tilt angle in the front-rear direction is input.
- the crank angle signal is also used as a signal representing the rotational speed Ne of the internal combustion engine 2.
- the tilt sensor 18 for example, the tilt sensor disclosed in the above-mentioned Japanese Patent Application Laid-Open No. 2008-14193 can be used.
- the inclination angle in the front-rear direction of the vehicle is simply referred to as a front-rear gradient.
- the brake switch 15 is not a mechanical switch, and is configured by a pressure sensor or the like that outputs an OFF signal when the brake hydraulic pressure is lower than the hydraulic pressure threshold value and outputs an ON signal when the brake hydraulic pressure exceeds the hydraulic pressure threshold value.
- the brake fluid pressure being equal to or lower than the fluid pressure threshold corresponds to a state where the brake pedal is not depressed.
- the engine controller 11 controls the fuel supply amount and supply timing from the fuel injector 3 and the ignition timing by the spark plug 4 according to the depression amount of the accelerator pedal of the vehicle 1.
- the engine controller 11 also automatically stops the internal combustion engine 2 when the first automatic stop condition is satisfied while the vehicle is stopped in order to reduce fuel consumption. Furthermore, in order to increase the chances of the automatic stop of the internal combustion engine 2, the internal combustion engine 2 is automatically stopped when the second automatic stop condition is satisfied while the vehicle 1B is traveling. However, any automatic stop is performed only when the warm-up operation of the internal combustion engine 2 is completed.
- the automatic stop of the internal combustion engine 2 is performed when the engine controller 11 stops fuel injection by the fuel injector 3 and ignition of the spark plug 4 both when the vehicle is stopped and during travel.
- This operation is generically called fuel cut.
- the fuel cut does not stop the rotation of the internal combustion engine 2 but means stop the driving of the internal combustion engine 2. Therefore, even if the internal combustion engine 2 is automatically stopped by the fuel cut, the internal combustion engine 2 may continue to rotate due to inertia.
- the engine controller 11 activates the starter motor 23 to While performing the ranking, the fuel injection by the fuel injector 3 and the ignition of the injected fuel by the spark plug 4 are resumed. Thereby, the internal combustion engine 2 is restarted when the vehicle is stopped.
- the engine controller 11 when the first restart condition is satisfied and the internal combustion engine 2 is automatically stopped while the vehicle is stopped, the engine controller 11 does not restart the internal combustion engine 2 even if the second restart condition is satisfied. .
- the engine controller 11 restarts the internal combustion engine 2 only when the first restart condition is satisfied.
- the engine controller 11 causes the internal combustion engine 2 to stop even if the first restart condition is satisfied. Do not restart. The engine controller 11 restarts the internal combustion engine 2 only when the second restart condition is satisfied.
- the internal combustion engine 2 automatically stops, and the vehicle 1B stops as it is, regardless of whether the first restart condition is satisfied.
- the automatic stop of the internal combustion engine 2 is continued until the second restart condition is satisfied.
- the engine controller 11 restarts the internal combustion engine 2 when the second restart condition is satisfied in the stopped state.
- the stop time of the internal combustion engine 2 becomes longer than when the internal combustion engine 2 is automatically stopped only while the vehicle 1 is stopped.
- the fuel consumption can be reduced accordingly.
- the internal combustion engine 2 is automatically stopped while the vehicle is running, the creep torque cannot be obtained when the internal combustion engine 2 is stopped, so that the feeling of deceleration in the extremely low speed region increases and the driver may feel uncomfortable.
- each of the first automatic stop condition, the second automatic stop condition, the first restart condition, and the second restart condition includes a vehicle longitudinal gradient, Apply different gradient conditions to.
- the second automatic stop condition applied while the vehicle 1 is traveling is satisfied when all of the following conditions (1) to (3) are satisfied.
- the brake pedal is depressed, that is, the brake switch 15 is ON; (2)
- the vehicle speed VSP is less than or equal to the lockup-off vehicle speed; (3)
- the forward / backward gradient is equal to or less than the second gradient threshold value.
- the second restart condition determined after the automatic stop of the internal combustion engine 2 based on the second automatic stop condition is that the following condition (11) is satisfied.
- the first automatic stop condition applied while the vehicle 1 is stopped is satisfied when all of the following conditions (21) to (23) are satisfied.
- the brake pedal is depressed;
- the vehicle speed VSP is 0 km / hr or in the vicinity of 0 km / hr;
- the forward / backward gradient is equal to or less than the first gradient threshold value.
- the first restart condition determined after the automatic stop of the internal combustion engine 2 based on the first automatic stop condition is satisfied when the condition (11) is satisfied in the same manner as the second restart condition.
- the first automatic stop condition includes the condition (23) related to the longitudinal gradient
- the second automatic stop condition includes the condition (3) related to the longitudinal gradient
- the second gradient threshold is set to the first gradient threshold. The smaller setting constitutes the subject of this automatic engine stop device.
- FIG. 1A-2D With reference to 2A-2D, the case where the stopped internal combustion engine 2 automatically stops and the case where the internal combustion engine 2 automatically stops while the vehicle 1A is traveling will be described.
- FIG. In 2A-2D for the sake of comparison, the automatic stop of the stopped internal combustion engine 2 and the automatic stop of the traveling internal combustion engine 2 are shown in parallel, but both are not performed simultaneously.
- FIG. A solid line 2B indicates a change in the engine rotation speed Ne due to the automatic stop of the internal combustion engine 2 based on the second automatic stop condition applied while the vehicle 1A is traveling.
- FIG. A two-dot chain line 2B indicates a change in the engine rotation speed Ne due to the automatic stop of the internal combustion engine 2 based on the first automatic stop condition applied while the vehicle 1A is stopped. The reason why the restart timing of the internal combustion engine 2 is different in the two cases will be described later.
- Fig. 2A-2D shows a vehicle speed VSP, an internal combustion engine rotational speed Ne, and a pinion rotation when the vehicle 1 equipped with the automatic transmission 32 is decelerated slowly during coasting and then the vehicle 1 is stopped and then the vehicle 1 is started. Changes in speed Np, brake fluid pressure determination, and longitudinal gradient threshold are shown.
- FIG. The solid line 2B indicates the engine speed Ne when the internal combustion engine 2 is stopped when the second automatic stop condition is satisfied while the vehicle 1A is traveling, and the internal combustion engine 2 is restarted when the second restart condition is satisfied. Showing change.
- FIG. A chain line 2B indicates a change in the engine speed Ne when the internal combustion engine 2 is stopped when the first automatic stop condition is satisfied while the vehicle 1 is stopped and the internal combustion engine 2 is restarted when the first restart condition is satisfied.
- the brake hydraulic pressure exceeds a predetermined hydraulic pressure threshold value, and the brake switch 15 is turned ON, so that the brake hydraulic pressure determination flag is switched from 0 to 1.
- the second automatic stop condition is satisfied at time t21 when the vehicle speed VSP decreases to a speed slightly exceeding 10 kilometers per hour (10 km / hr). Therefore, the engine controller 11 automatically stops the internal combustion engine 2 by performing fuel cut.
- the engine rotational speed Ne decreases sharply at time t21.
- the engine rotation speed Ne becomes zero. That is, the internal combustion engine 2 stops rotating.
- starter pre-engagement starts at time t22 immediately after the fuel cut.
- the starter pre-engage means an operation of previously meshing the pinion of the starter motor 23 with the ring gear in preparation for restart of the internal combustion engine 2. This operation is performed by the engine controller 11.
- a flywheel is fixed to the rear end of the crankshaft of the internal combustion engine 2.
- a ring gear is formed on the outer periphery of the flywheel.
- the starter motor 23 rotates the ring gear by receiving a start request and meshing the pinion with the ring gear. This operation is referred to as cranking of the internal combustion engine 2.
- the pinion of the starter motor 23 is not always engaged with the ring gear. It takes some time to engage the pinion with the ring gear. On the other hand, in restarting the internal combustion engine 2 from automatic stop, there is a demand for cranking as soon as possible. In order to meet this requirement, starter pre-engagement is performed in which the pinion of the starter motor 23 and the ring gear are engaged in advance in accordance with the cutting of the torque converter 31. Thereby, when the restart request
- the engine controller 11 drives the starter motor 23 via the starter motor driving relay 22 to crank the internal combustion engine 2 and to the internal combustion engine 2 by the fuel injector 3.
- the fuel injection and ignition by the spark plug 4 are resumed.
- the engine speed Ne rapidly increases.
- the engine rotational speed Ne settles to the idle rotational speed.
- the vehicle speed VSP may become zero while the internal combustion engine 2 is rotating without the second automatic stop condition being satisfied while the vehicle 1B is traveling. For example, this corresponds to the case where the gradient of the road is between the second gradient threshold value and the first gradient threshold value, or the case where the vehicle speed is lowered on the uphill and the brake pedal is not depressed. In this case, the first automatic stop condition is satisfied at time t24.
- the engine controller 11 When the first automatic stop condition is satisfied at time t24, the engine controller 11 performs fuel cut and automatically stops the internal combustion engine 2.
- the brake fluid pressure becomes less than the fluid pressure threshold when the driver takes his foot off the brake pedal to start the vehicle 1 at time t25.
- the brake switch 15 is turned off, the brake hydraulic pressure determination flag is switched from 1 to 0. At this timing, the second restart condition is satisfied.
- the engine controller 11 restarts the internal combustion engine 2 at time t25 when the first restart condition is satisfied.
- the second automatic stop condition is satisfied in the period from time t21 to time t25
- the first automatic stop condition is satisfied in the period from time t24 to time t25.
- FIG. 3 an automatic stop routine of the internal combustion engine 2 executed by the engine controller 11 while the vehicle 1 is running will be described for the above control. This routine is repeatedly executed while the vehicle 1 is running by starting the next routine execution simultaneously with the end of the routine.
- steps S1 and S2 the engine controller 11 determines whether or not a second automatic stop condition applied while the vehicle 1 is traveling is satisfied.
- the above three conditions (1) to (3) are grouped into two conditions (1), (2) and condition (3).
- step S1 the engine controller 11 determines whether both conditions (1) and (2) are satisfied. Conditions (1) and (2) are collectively referred to herein as conditions for permitting automatic engine stop during vehicle travel. If the determination is negative, the engine controller 11 does not proceed to the next step S2 and waits until the determination is positive.
- step S1 determines whether or not the condition (3) is satisfied in step S2, that is, whether the vehicle 1B longitudinal gradient is equal to or less than the second gradient threshold value.
- step S2 As long as the determination in step S2 is negative, the engine controller 11 waits without proceeding to the next step S3.
- step S2 determines whether the determination in step S2 is affirmative. If the determination in step S2 is affirmative, the engine controller 11 performs a fuel cut in step S3. After executing the fuel cut in step S3, the engine controller 11 performs the process of step S4.
- step S4 the engine controller 11 determines whether or not the second restart condition is satisfied.
- the second restart condition is satisfied when the aforementioned condition (11) is satisfied.
- step S4 when the second restart condition is satisfied, the engine controller 11 restarts the internal combustion engine 2 in step S5. That is, by driving the starter motor 23 via the starter motor drive relay 22, cranking of the internal combustion engine 2 is performed, and fuel injection to the internal combustion engine 2 by the fuel injector 3 and ignition by the spark plug 4 are resumed. .
- step S5 the engine controller 11 ends the routine. In addition, after finishing the routine, the engine controller 11 immediately starts the next routine execution.
- step S4 the engine controller 11 waits until the second restart condition is satisfied.
- FIG. 4 an automatic stop routine of the internal combustion engine 2 executed by the engine controller 11 when the vehicle 1 is stopped will be described. This routine is also repeatedly executed while the vehicle 1 is stopped by starting the next routine execution simultaneously with the end of the routine.
- the engine controller 11 determines whether the vehicle 1 is traveling or stopped based on the vehicle speed VSP detected by the vehicle speed sensor 17.
- FIG. 3 The contents of the routine 4 are FIG. 3 is almost the same as the routine for automatically stopping the internal combustion engine 2 during traveling.
- the engine controller 11 determines whether or not the first automatic stop condition is satisfied in steps S11 and S12.
- the above three conditions (21) to (23) are grouped into two conditions (21) and (22) and condition (23).
- step S11 the engine controller 11 determines whether both conditions (21) and (22) are satisfied.
- the conditions (21) and (22) are collectively referred to as a stop engine automatic stop permission condition.
- the establishment of the automatic engine stop permission condition while the vehicle is stopped means that both the conditions (21) and (22) are satisfied.
- step S11 As long as the determination in step S11 is negative, the engine controller 11 waits without proceeding to the next step S12.
- step S12 determines in step S12 whether or not the condition (23) is satisfied, that is, whether the front-to-back gradient is equal to or less than the first gradient threshold value.
- the second gradient threshold is set smaller than the first gradient threshold. That is, the first gradient threshold is greater than the second gradient threshold. If the front-rear gradient is equal to or less than the first gradient threshold value, the engine controller 11 executes fuel cut in step S13. If the front / rear gradient is greater than the first gradient threshold, the engine controller 11 stands by without performing the process of step S13.
- step S13 After executing the fuel cut in step S13, the engine controller 11 performs the process of step S14.
- step S14 the engine controller 11 determines whether or not the first restart condition is satisfied.
- the first restart condition is satisfied when the aforementioned condition (11) is satisfied.
- step S14 when the first restart condition is satisfied, the engine controller 11 restarts the internal combustion engine 2 in step S15. That is, by driving the starter motor 23 via the starter motor drive relay 22, cranking of the internal combustion engine 2 is performed, and fuel injection to the internal combustion engine 2 by the fuel injector 3 and ignition by the spark plug 4 are resumed. .
- step S15 the engine controller 11 ends the routine. In addition, after finishing the routine, the engine controller 11 immediately starts the next routine execution.
- step S14 the engine controller 11 waits until the first restart condition is satisfied.
- FIG. 3 of the internal combustion engine 2 while the vehicle 1 is traveling FIG.
- the automatic stop routine of the internal combustion engine 2 during stoppage 4 is selectively executed according to the vehicle speed VSP at the start of the routine execution. After the execution of one routine is started, the other routine is not executed until the routine ends. Therefore, FIG. When the routine for automatically stopping the internal combustion engine 2 while the vehicle 1 is traveling as shown in FIG. 3 is executed, the execution of this routine is continued even when the vehicle 1 is stopped.
- this automatic engine stop device indicates that, as a first automatic stop condition for stopping the internal combustion engine 2 while the vehicle 1 is stopped, the longitudinal gradient of the vehicle 1 is equal to or less than the first gradient threshold value. Request.
- a second automatic stop condition for stopping the internal combustion engine 2 while the vehicle 1 is traveling it is required that the longitudinal gradient of the vehicle 1 is equal to or less than a second gradient threshold value.
- the second gradient threshold is set smaller than the first gradient threshold.
- FIG. 5 and FIG. A second embodiment of the present invention will be described with reference to 6A-6G.
- This embodiment is directed to a vehicle 1A including a manual transmission 7, a clutch 5, and a clutch pedal 6 instead of the automatic transmission 31 and the torque converter 32.
- the vehicle 1A is a so-called manual vehicle.
- the internal combustion engine 2 is connected to a manual transmission 7 via a clutch 5.
- the clutch 5 is connected / disconnected by the clutch pedal 6.
- an upper clutch switch 12 and a low work latch switch 13 are provided on the clutch pedal 6.
- the upper clutch switch 12 outputs an ON signal when the driver of the vehicle 1A is off the clutch pedal 6, that is, when the internal combustion engine 2 and the manual transmission 7 are directly connected.
- the upper clutch switch 12 also outputs an OFF signal when the driver depresses the clutch pedal 6 in order to cut off the coupling between the internal combustion engine 2 and the manual transmission 7.
- the low work latch switch 13 outputs an ON signal in a state where the driver depresses the clutch pedal 6 and the coupling between the internal combustion engine 2 and the manual transmission 7 is completely cut off. In other cases, that is, when the coupling between the internal combustion engine 2 and the manual transmission 7 is not completely cut off, for example, in a half-clutch state where the driver returns the clutch pedal 6, Is output.
- the engine automatic stop device changes the first restart condition and the second restart condition of the first embodiment.
- the clutch pedal 6 is requested to be depressed as the first restart condition.
- the shift position of the manual transmission 7 is required to be a position other than neutral.
- the second restart condition it is requested that the clutch pedal 6 is depressed and the player pedal is not depressed or the accelerator pedal is depressed. Under the second restart condition, the stopped state of the internal combustion engine 2 is maintained until immediately before the start or acceleration of the vehicle 1A.
- maintaining the stop state of the internal combustion engine 2 until immediately before the start or acceleration of the vehicle 1A increases the stop time of the internal combustion engine 2 and is preferable for reducing fuel consumption. If the stop time of the internal combustion engine 2 becomes longer, the driver may feel uneasy. Such anxiety is so severe that the slope is steep.
- the first automatic stop condition applied while the vehicle 1A is stopped requires that the road gradient is equal to or less than the first gradient threshold value.
- the second automatic stop condition applied while the vehicle 1A is traveling requires that the road gradient is equal to or lower than the second gradient threshold value, thereby limiting the automatic stop of the internal combustion engine 2 on a slope. Yes.
- the second automatic stop condition applied while the vehicle 1A is traveling is satisfied by satisfying all the following conditions (1) to (6).
- the brake pedal is depressed, that is, the brake switch 15 is ON; (2) The shift position of the manual transmission 7 is a position other than neutral; (3) The clutch pedal 6 is depressed and the clutch 5 is completely disconnected, that is, the low work latch switch 13 is ON; (4) The vehicle speed VSP is a predetermined vehicle speed set in advance, for example, 10 km / hr or less; (5) The front-rear gradient is less than or equal to the second gradient threshold.
- the second restart condition for restarting the internal combustion engine 2 that has been stopped due to the establishment of the second automatic stop condition satisfies the condition (11) and satisfies any of the conditions (12) to (14). It is established by being.
- the shift position of the manual transmission 7 is a position other than neutral.
- the first automatic stop condition applied while the vehicle is stopped is satisfied by satisfying all of the following conditions (21) to (24).
- the shift position of the manual transmission 7 is the neutral position; (22) The clutch pedal 6 returns and the clutch 5 is connected, that is, the low work latch switch 13 is OFF; (23) The vehicle speed VSP is 0 km / hr or in the vicinity of 0 km / hr; (24) The forward / backward gradient is not more than the first gradient threshold value.
- the first restart condition for restarting the internal combustion engine 2 that has been stopped by the establishment of the first automatic stop condition is satisfied when either of the following conditions (31) and (32) is satisfied.
- the front-back gradient is greater than the first gradient threshold.
- the engine controller 11 is based on these conditions, as in the first embodiment.
- the automatic stop routines 3 and 4 are executed. However, in step S1, it is determined whether or not all of the conditions (1) to (4) are satisfied. In step S4, it is determined whether condition (11) is satisfied and any of conditions (12)-(14) is satisfied. In step S11, it is determined whether or not all of the conditions (21) to (23) are satisfied. In step S14, it is determined whether or not any of the conditions (31) and (32) is satisfied.
- the first implementation is performed by setting the second gradient threshold value to be smaller than the first gradient threshold value. Similar to the configuration, when the internal combustion engine 2 is stopped while traveling on a hill, the uncomfortable feeling felt by the driver can be suppressed.
- the internal combustion engine can be automatically stopped and restarted without giving the driver a sense of incongruity on the slope. Therefore, it is possible to reduce the fuel consumption of the vehicle more easily.
Abstract
Description
(2)車速VSPはロックアップオフ車速以下である;
(3)前後勾配が第2の勾配しきい値以下である。
(22)車速VSPが0km/hrあるいは0km/hrの近傍である;
(23)前後勾配が第1の勾配しきい値以下である。
長くなり、燃料消費の低減には好ましいが、上り坂や下り坂の坂道での内燃エンジン2の停止時間が長くなることでドライバに不安感を与える可能性がある。こうした不安感は坂道の傾斜がきついほど大きい。
(2)手動変速機7のシフト位置はニュートラル以外の位置である;
(3)クラッチペダル6の踏み込みがありクラッチ5が完全に切断されている、つまりロワークラッチスイッチ13がONである;
(4)車速VSPが予め定めている所定の車速、例えば10km/hr以下である;
(5)前後勾配が第2の勾配しきい値以下である。
(13)アクセルペダルが踏み込まれている;
(14)前後勾配が第2の勾配しきい値より大きい。
(22)クラッチペダル6が戻り、クラッチ5が接続されている、つまりロワークラッチスイッチ13がOFFである;
(23)車速VSPが0km/hrあるいは0km/hrの近傍である;
(24)前後勾配が第1の勾配しきい値以下である。
Claims (4)
- 内燃エンジン(2)を走行用動力源とする車両(1A,1B)が停車中に第1の自動停止条件が成立した場合、あるいは車両(1A,1B)が走行中に第2の自動停止条件が成立した場合に、内燃エンジン(2)を自動停止するとともに、
第1の自動停止条件は走路勾配が第1の勾配しきい値以下であることを要求し、
第2の自動停止条件は走路勾配が第2の勾配しきい値以下であることを要求し、
第2の勾配しきい値は第1の勾配しきい値より小さな値に設定される、エンジン自動停止装置。 - 車両(1B)は自動変速機(32)と、内燃エンジン(2)と自動変速機(32)を接続するトルクコンバータ(31)とを備える、請求項1のエンジン自動停止装置。
- 第1の自動停止条件に基づき自動停止した内燃エンジン(2)について、第1の再始動条件が成立する場合に、内燃エンジン(2)を再始動し、第2の自動停止条件に基づき自動停止した内燃エンジン(2)について、第2の再始動条件が成立する場合に、内燃エンジン(2)を再始動するように構成され、
車両(1A)は手動変速機(7)と、内燃エンジン(2)と手動変速機(7)とを結合するクラッチ(5)と、踏み込み応じてクラッチ(5)による内燃エンジン(2)と手動変速機(7)の結合を遮断するクラッチペダル(6)とを備え、第1の再始動条件はクラッチペダル(6)の踏み込みによって成立するように設定され、
車両(1A)はブレーキペダルとアクセルペダルを備え、第2の再始動条件はクラッチペダル(6)の踏み込みに続いて、ブレーキペダルが開放されるかあるいはアクセルペダルが踏み込まれた場合に成立するように設定される、請求項1のエンジン自動停止装置。 - 内燃エンジン(2)を走行用動力源とする車両(1A,1B)が停車中に第1の自動停止条件が成立した場合、あるいは車両(1A,1B)が走行中に第2の自動停止条件が成立した場合に、内燃エンジン(2)を自動停止するとともに、
第1の自動停止条件は走路勾配が第1の勾配しきい値以下であることを要求し、
第2の自動停止条件は走路勾配が第2の勾配しきい値以下であることを要求し、
第2の勾配しきい値は第1の勾配しきい値より小さな値に設定される、エンジン自動停止方法。
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JP2012525444A JP5376062B2 (ja) | 2010-07-23 | 2011-07-22 | エンジン自動停止装置及び自動停止方法 |
US13/811,500 US9249741B2 (en) | 2010-07-23 | 2011-07-22 | Engine automatic stopping device and engine automatic stopping method |
CN201180035881.5A CN103026035B (zh) | 2010-07-23 | 2011-07-22 | 发动机自动停止装置及自动停止方法 |
BR112013001747A BR112013001747A2 (pt) | 2010-07-23 | 2011-07-22 | dispositivo de interrupção automática de motor e método de interrupção automática de motor |
EP11809738.5A EP2597291A1 (en) | 2010-07-23 | 2011-07-22 | Engine automatic stop device and automatic stop method |
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JP (1) | JP5376062B2 (ja) |
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JP5376062B2 (ja) | 2013-12-25 |
MY158166A (en) | 2016-09-15 |
CN103026035A (zh) | 2013-04-03 |
CN103026035B (zh) | 2015-08-19 |
US20130131966A1 (en) | 2013-05-23 |
BR112013001747A2 (pt) | 2019-09-24 |
US9249741B2 (en) | 2016-02-02 |
EP2597291A1 (en) | 2013-05-29 |
JPWO2012011568A1 (ja) | 2013-09-09 |
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