WO2012077248A1 - 自動二輪車 - Google Patents
自動二輪車 Download PDFInfo
- Publication number
- WO2012077248A1 WO2012077248A1 PCT/JP2011/001731 JP2011001731W WO2012077248A1 WO 2012077248 A1 WO2012077248 A1 WO 2012077248A1 JP 2011001731 W JP2011001731 W JP 2011001731W WO 2012077248 A1 WO2012077248 A1 WO 2012077248A1
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- WIPO (PCT)
- Prior art keywords
- fuel
- state
- detected
- heating
- motorcycle
- Prior art date
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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
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/30—Controlling fuel injection
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62J—CYCLE SADDLES OR SEATS; AUXILIARY DEVICES OR ACCESSORIES SPECIALLY ADAPTED TO CYCLES AND NOT OTHERWISE PROVIDED FOR, e.g. ARTICLE CARRIERS OR CYCLE PROTECTORS
- B62J37/00—Arrangements of fuel supply lines, taps, or the like, on motor cycles or engine-assisted cycles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62K—CYCLES; CYCLE FRAMES; CYCLE STEERING DEVICES; RIDER-OPERATED TERMINAL CONTROLS SPECIALLY ADAPTED FOR CYCLES; CYCLE AXLE SUSPENSIONS; CYCLE SIDE-CARS, FORECARS, OR THE LIKE
- B62K11/00—Motorcycles, engine-assisted cycles or motor scooters with one or two wheels
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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
- F02M31/00—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture
- F02M31/02—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for heating
- F02M31/12—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for heating electrically
- F02M31/125—Fuel
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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
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/0047—Layout or arrangement of systems for feeding fuel
- F02M37/007—Layout or arrangement of systems for feeding fuel characterised by its use in vehicles, in stationary plants or in small engines, e.g. hand held tools
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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
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/0076—Details of the fuel feeding system related to the fuel tank
- F02M37/0082—Devices inside the fuel tank other than fuel pumps or filters
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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
- Y02T10/12—Improving ICE efficiencies
Definitions
- the present invention relates to a motorcycle capable of heating fuel when starting an engine.
- the fuel in the fuel pipe is heated by the heater.
- the degree of fuel heating by the heater is determined based on the temperature of the cooling water and the standing time from the stop of the engine to the restart of the engine. Thereby, overheating of the fuel at the time of starting is prevented.
- An object of the present invention is to provide a motorcycle capable of improving engine starting characteristics while preventing overheating of fuel.
- a motorcycle includes a main body that supports front wheels and rear wheels, an engine provided in the main body, a fuel injection device provided in the engine, a fuel tank provided in the main body, A fuel pump having a suction port in the fuel tank and supplying the fuel in the fuel tank to the fuel injection device through the fuel pipe, a fuel heating device for heating the fuel in the fuel pipe, and an inclination for detecting the inclination of the main body
- the fuel in the fuel tank is sucked from the suction port in the fuel tank by the fuel pump and supplied to the fuel injection device through the fuel pipe.
- the fuel in the fuel pipe is heated by the fuel heating device.
- the fuel at the suction port of the fuel pump may be insufficient due to the inclination of the main body.
- air may be mixed into the fuel in the fuel pipe, and the amount of fuel in the fuel pipe may be reduced.
- the inclination of the main body is detected by the inclination detector.
- the control unit Based on the detection result of the inclination detection unit, the control unit detects a first state where fuel is present at the suction port of the fuel pump and a second state where fuel is insufficient at the suction port of the fuel pump. When the second state is detected, the operation of the fuel heating device is prohibited by the control unit. Thereby, the fuel in the fuel pipe is not heated.
- control unit detects the transition from the second state to the first state, whether or not a predetermined amount of fuel has been injected from the fuel injection device after the transition to the first state. And the operation of the fuel heating device may be prohibited until a predetermined amount of fuel is injected.
- the fuel at the suction port of the fuel pump is insufficient.
- air may be sucked into the fuel pipe from the suction port.
- the air in the fuel pipe is discharged by injecting a predetermined amount of fuel from the fuel injection device. Therefore, the operation of the fuel heating device is prohibited until a predetermined amount of fuel is injected from the fuel injection device after the transition to the first state. Thereby, it is possible to reliably prevent the fuel in the fuel pipe from being overheated.
- the motorcycle includes a side stand that supports the main body in an inclined state with respect to the ground, a side stand state detection unit that detects whether the side stand is in a grounded state or a non-grounded state, and a fuel remaining in the fuel tank.
- a fuel remaining amount detection unit that detects the amount of fuel, and the control unit detects a ground state by the side stand state detection unit and a first amount of fuel that is detected by the fuel remaining amount detection unit.
- a second threshold value in which a case where it is equal to or less than a threshold value is detected as a second state, a non-ground state is detected by the side stand state detection unit, and a remaining fuel amount detected by the remaining fuel amount detection unit is predetermined The following cases may be detected as the second state.
- the fuel tank is tilted together with the main body. Therefore, whether the side stand is grounded or not is different depending on whether fuel is present or insufficient at the suction port of the fuel pump. Therefore, when the side stand is in the grounded state, the case where the fuel remaining amount in the fuel tank is less than or equal to the first threshold is detected as the second state, and in the non-grounded state of the side stand, the fuel remaining amount in the fuel tank is The case where it is below the second threshold is detected as the second state. Thereby, it is accurately determined whether fuel is present or insufficient at the suction port of the fuel pump according to the grounding state and the non-grounding state of the side stand. As a result, it is possible to reliably prevent the fuel in the fuel pipe from being overheated.
- the motorcycle may further include a fall detection unit that detects the fall of the motorcycle, and the control unit may detect when the fall detection unit detects a fall as the second state.
- the motorcycle further includes an ambient temperature detection unit that detects a temperature around the fuel injected from the fuel injection device, and the control unit detects a temperature detected by the ambient temperature detection unit equal to or higher than a predetermined temperature. In such a case, the operation of the fuel heating device is prohibited, and the operation of the fuel heating device is permitted when the temperature detected by the ambient temperature detection unit is lower than the predetermined temperature and the first state is detected. Good.
- the fuel in the fuel pipe is not heated. Further, when the temperature around the fuel injected from the fuel injection device is lower than a predetermined temperature and the fuel is present at the suction port of the fuel pump, the fuel in the fuel pipe is heated. As a result, it is possible to improve engine starting characteristics while reliably preventing overheating of the fuel.
- the ambient temperature detection unit may detect at least one of the temperature of the engine and the temperature of the air taken into the engine as the ambient temperature.
- FIG. 1 is a schematic side view showing a motorcycle according to the present embodiment.
- FIG. 2 is an enlarged view of a part of the motorcycle shown in FIG.
- FIG. 3 is a cross-sectional view showing the internal configuration of the fuel tank.
- FIG. 4 is a cross-sectional view showing the internal configuration of the fuel tank.
- FIG. 5 is a cross-sectional view showing the internal configuration of the fuel tank.
- FIG. 6 is a block diagram showing a configuration of a control system of the motorcycle shown in FIG.
- FIG. 7 is a flowchart showing the control operation of the fuel heating device by the ECU after the main switch is turned on.
- FIG. 8 is a flowchart showing the fuel heating prohibition determination process of FIG.
- FIG. 9 is a flowchart showing the remaining fuel amount determination process of FIG.
- FIG. 10 is a flowchart showing the heating return process of FIG.
- FIG. 11 is a flowchart showing the heating prohibition process of FIG.
- FIG. 1 is a schematic side view showing a motorcycle according to the present embodiment.
- FIG. 2 is an enlarged view of a part of the motorcycle shown in FIG.
- a head pipe 102 is provided at the front end of the main body frame 101.
- a front fork 103 is attached to the head pipe 102. In this state, the front fork 103 is rotatable within a predetermined angle range around the axis of the head pipe 102.
- a front wheel 104 is rotatably supported at the lower end of the front fork 103.
- a handle 105 is provided at the upper end of the head pipe 102.
- the rear arm 106 is connected to the main body frame 101 so as to extend rearward from the main body frame 101.
- the rear arm 106 rotatably holds the rear wheel driven sprocket 107 and the rear wheel 108.
- a chain 109 is attached to the rear wheel driven sprocket 107.
- the engine 110 is provided at the center of the main body frame 101.
- An intake pipe 111 and an exhaust pipe 112 are attached to an intake port and an exhaust port of the engine 110, respectively.
- One end of the side stand 120 is attached to the lower end of the main body frame 101 so as to be rotatable about the shaft 120a.
- the side stand 120 is switched between a substantially horizontal state (hereinafter referred to as a non-grounded state) in which the tip is separated from the ground and a substantially vertical state in which the tip is in contact with the ground (hereinafter referred to as a grounded state).
- a substantially horizontal state hereinafter referred to as a non-grounded state
- a substantially vertical state in which the tip is in contact with the ground
- a fuel tank 130 is provided above the engine 110, and a seat 121 is provided behind the fuel tank 130.
- an air cleaner 113 is provided upstream of the intake pipe 111.
- a fuel injection device 115 is attached to the intake pipe 111.
- a fuel pump 131 is provided in the fuel tank 130. The fuel pump 131 is connected to the fuel injection device 115 through the fuel pipe 132 and the fuel heating device 114. The fuel heating device 114 is attached so that the fuel in the fuel pipe 132 can be heated.
- a muffler 116 is attached to the downstream end of the exhaust pipe 112.
- an ECU (Electronic Control Unit) 150 is provided below the sheet 121.
- An engine temperature sensor SE1 for detecting the temperature of the engine 110 is attached to the side surface of the engine 110.
- An intake air temperature sensor SE ⁇ b> 2 that detects the temperature of air taken into the engine 110 is attached to the intake pipe 111.
- the seat 121 is provided with a fall sensor SE3 that detects whether or not the motorcycle 1 has fallen.
- a fuel remaining amount sensor SE4 for detecting the remaining fuel in the fuel tank 130 is attached.
- An oxygen sensor SE5 that detects the concentration of oxygen in the gas exhausted from the engine 110 is attached to the exhaust pipe 112.
- a side stand switch SW is attached to the shaft 120 a of the side stand 120. The side stand switch SW is turned on and off when the side stand 120 is switched between a grounded state and a non-grounded state.
- a plane passing through the center of the main body frame 101, the head pipe 102, the front wheel 104, and the rear wheel 108 of the motorcycle 1 is referred to as a symmetry plane.
- the motorcycle 1 is said to be in a vertical state when the plane of symmetry of the motorcycle 1 is parallel to the direction of gravity, and the motorcycle 1 is said to be in an inclined state when the plane of symmetry of the motorcycle 1 is not parallel to the direction of gravity.
- the motorcycle 1 is in a vertical state when the side stand 120 is in an ungrounded state, and that the motorcycle 1 is in an inclined state when the side stand 120 is in a grounded state.
- FIGS. 3, 4 and 5 are sectional views showing the internal configuration of the fuel tank 130.
- FIG. 3 and 4 show a longitudinal section perpendicular to the front-rear direction of the motorcycle 1
- FIG. 5 shows a longitudinal section parallel to the front-rear direction of the motorcycle 1.
- 3 shows a state inside the fuel tank 130 when the motorcycle 1 is in a vertical state
- FIG. 4 shows a state inside the fuel tank 130 when the motorcycle 1 is overturned.
- the front-rear direction of the motorcycle 1 is indicated by an arrow FW
- the direction parallel to the direction of gravity is indicated by an arrow Z.
- a fuel pump 131 a fuel filter 133, and a fuel remaining amount sensor SE4 are provided inside the fuel tank 130.
- the fuel tank 130 is filled with fuel FL.
- a mixed fuel of gasoline and alcohol is used as the fuel FL.
- the suction port 134 of the fuel pump 131 is disposed at the lower part of the fuel tank 130.
- the fuel pipe 132 of FIG. 2 is attached to the discharge port 135 of the fuel pump 131.
- the fuel FL is sucked into the fuel pump 131 from the suction port 134 through the fuel filter 133.
- the fuel pump 131 supplies the fuel FL from the discharge port 135 to the fuel injection device 115 through the fuel pipe 132 shown in FIG.
- the fuel remaining amount sensor SE4 has a float and detects the level of the fuel FL in the fuel tank 130 as the fuel remaining amount.
- the side stand 120 when the side stand 120 is in a grounded state and the fuel FL in the fuel tank 130 is small, the fuel FL below the fuel tank 130 is not sucked into the fuel pump 131 from the suction port 134. Further, when the side stand 120 is not grounded and the motorcycle 1 is in a vertical state and the fuel FL in the fuel tank 130 is further reduced, the fuel FL below the fuel tank 130 is sucked into the fuel pump 131 from the suction port 134. I can't. Also in these cases, air is sucked into the fuel pump 131 from the suction port 134 and air is mixed into the fuel in the fuel pipe 132 and the fuel injection device 115 as in the case where the motorcycle 1 is overturned.
- FIG. 6 is a block diagram showing the configuration of the control system of the motorcycle 1 of FIG.
- the ECU 150 includes I / Fs (interfaces) 501 and 505, a CPU (central processing unit) 502, a ROM (read only memory) 503, and a RAM (random access memory) 504.
- I / Fs interfaces
- CPU central processing unit
- ROM read only memory
- RAM random access memory
- the detected values of the engine temperature sensor SE1, the intake air temperature sensor SE2, the fall sensor SE3, the remaining fuel amount sensor SE4 and the oxygen sensor SE5 and the state of the side stand switch SW are given to the CPU 502 via the I / F 501 of the ECU 150.
- the ROM 503 of the ECU 150 stores a program for performing a control operation described later.
- the CPU 502 performs a control operation by executing a control operation program stored in the ROM 503 on the RAM 504.
- the CPU 502 controls the fuel heating device 114 based on the detected values of the engine temperature sensor SE1, the intake air temperature sensor SE2, the falling sensor SE3 and the remaining fuel amount sensor SE4 and the state of the side stand switch SW.
- the CPU 502 controls the fuel injection device 115 so that the air-fuel ratio of the air-fuel mixture in the engine 110 becomes the stoichiometric air-fuel ratio based on the detection value of the oxygen sensor SE5.
- FIG. 7 is a flowchart showing the control operation of the fuel heating device 114 by the ECU 150 after the main switch is turned on.
- the CPU 502 of the ECU 150 determines whether or not the fuel heating device 114 should be driven after the driver turns on the main switch, and drives or does not drive the fuel heating device 114 based on the determination result. .
- the driver turns on the starter switch at an arbitrary timing after turning on the main switch. When the starter switch is turned on, fuel injection from the fuel injection device 115 is started.
- an engine temperature threshold value and an intake air temperature threshold value are stored in advance.
- the CPU 502 detects the temperature of the engine 110 by acquiring the detection value of the engine temperature sensor SE1 (step S1). Next, the CPU 502 determines whether or not the detected temperature of the engine 110 is lower than the engine temperature threshold value stored in the RAM 504 (step S2).
- the CPU 502 detects the intake air temperature by acquiring the detected value of the intake air temperature sensor SE2 (step S3). Next, the CPU 502 determines whether or not the detected intake air temperature is lower than the intake air temperature threshold value stored in the RAM 504 (step S4).
- the CPU 502 determines that the fuel heating condition is satisfied (step S5). In this case, the CPU 502 performs a fuel heating prohibition determination process (step S6). Details of the fuel heating prohibition determination process will be described later.
- the result of the fuel heating prohibition determination process is stored in the RAM 504.
- the CPU 502 determines whether or not the result of the fuel heating prohibition determination process stored in the RAM 504 is heating permission (step S7). If the result of the fuel heating prohibition determination process is heating permission, the CPU 502 determines that the fuel heating condition is satisfied and heating is permitted (step S8). In this case, the CPU 502 drives the fuel heating device 114 (step S9). Thereafter, the CPU 502 returns to the process of step S1.
- step S2 determines that the fuel heating condition is It is determined that it has not been established (step S10). In this case, the CPU 502 does not drive the fuel heating device 114 (step S11) and returns to the process of step S1.
- step S7 If the result of the fuel heating prohibition determination process is heating prohibition in step S7, the CPU 502 does not drive the fuel heating device 114 (step S11) and returns to the process of step S1.
- the fuel heating condition is satisfied when the temperature of the engine 110 is lower than the engine threshold and the intake air temperature is lower than the intake air temperature threshold, and is not satisfied in other cases.
- the fuel heating device 114 operates when the fuel heating condition is satisfied and the result of the fuel heating prohibition determination process is heating permission. Thereby, the fuel FL in the fuel pipe 132 is heated.
- the fuel heating device 114 when the fuel heating condition is not established or when the result of the fuel heating prohibition determination process is heating prohibition, the fuel heating device 114 does not operate. Thereby, the fuel FL in the fuel pipe 132 is not heated.
- FIG. 8 is a flowchart showing the fuel heating prohibition determination process of FIG.
- CPU502 acquires the detected value of fall sensor SE3 (step S21).
- the CPU 502 determines whether or not the motorcycle 1 has fallen based on the detection value of the fall sensor SE3 (step S22).
- the CPU 502 performs a fuel remaining amount determination process (step S23).
- the remaining fuel amount determination process permission or prohibition is stored in the RAM 504 as the remaining fuel amount determination result.
- the remaining amount of fuel FL in the fuel tank 130 is less than or equal to a predetermined value, the fuel remaining amount determination result is prohibited.
- the remaining amount of the fuel FL in the fuel tank 130 is greater than a predetermined value, the fuel remaining amount determination result is permitted. Details of the remaining fuel amount determination process will be described later.
- the CPU 502 determines whether or not the fuel remaining amount determination result stored in the RAM 504 is permitted (step S24).
- the CPU 502 performs a heating return process (step S25).
- the RAM 504 stores information indicating that the heating recovery process has been executed or is being executed.
- the result of the fuel heating prohibition determination process (steps S27 and S28) returns from the heating prohibition to the heating permission, a certain amount of fuel is injected from the fuel injection device 115.
- the heating return processing state is being executed, and after the injection of a certain amount of fuel is completed, the heating return processing state is already executed. Details of the heating return process will be described later.
- the CPU 502 determines whether or not the heating return processing state stored in the RAM 504 has been performed (step S26).
- the CPU 502 stores heating permission in the RAM 504 as a result of the fuel heating prohibition determination processing (step S27), and proceeds to the processing in step S7 in FIG.
- step S28 When the motorcycle 1 is overturned at step S22 and when the remaining fuel amount determination result is prohibited at step S24, the CPU 502 performs a heating inhibition process (step S28).
- “in-progress” is stored in the RAM 504 as the heating recovery process state. Details of the heating inhibition process will be described later.
- the CPU 502 stores the prohibition in the RAM 504 as a result of the fuel heating prohibition determination process (step S29), and proceeds to the process of step S7 in FIG.
- step S26 When the heating return processing state is being implemented in step S26, the CPU 502 stores the prohibition in the RAM 504 as a result of the fuel heating prohibition determination process (step S29), and proceeds to the process of step S7 in FIG.
- FIG. 9 is a flowchart showing the remaining fuel amount determination process of FIG. First and second threshold values described later are stored in advance in the ROM 503 or the RAM 504.
- the CPU 502 detects the remaining amount of fuel in the fuel tank 130 by acquiring the detection value of the remaining fuel amount sensor SE4 (step S31).
- the CPU 502 detects the state of the side stand 120 by acquiring the state of the side stand switch SW (step S32), and determines whether or not the side stand 120 is in a grounded state (step S33).
- the CPU 502 determines whether or not the detected remaining fuel amount is greater than the first threshold value (step S34).
- the first threshold value is stored in advance in the ROM 503 or the RAM 504.
- the CPU 502 stores permission in the RAM 504 as the remaining fuel amount determination result (step S35).
- the CPU 502 stores prohibition in the RAM 504 as the fuel remaining amount determination result (step S37).
- step S36 the CPU 502 determines whether or not the detected remaining fuel amount is greater than the second threshold value (step S36).
- the CPU 502 stores permission in the RAM 504 as the remaining fuel amount determination result (step S35).
- the CPU 502 stores prohibition in the RAM 504 as the fuel remaining amount determination result (step S37).
- the first threshold value is more constant than the detected value of the fuel remaining amount sensor SE4 when the side stand 120 is in a grounded state and the liquid level of the fuel FL in the fuel tank 130 is at the upper end of the suction port 134. It is set larger by the margin of.
- the second threshold value is the remaining amount of fuel when the side stand 120 is not grounded, the motorcycle 1 is vertical, and the level of the fuel FL in the fuel tank 130 is at the upper end of the suction port 134. It is set larger by a certain margin than the detection value of the sensor SE4.
- the liquid level of the fuel FL in the fuel tank 130 is set regardless of whether the motorcycle 1 is in a vertical state or in an inclined state. It is determined whether or not it is above the suction port 134. Thereby, it is determined whether or not there is a possibility that air is mixed into the fuel in the fuel pipe 132 or the fuel injection device 115.
- FIG. 10 is a flowchart showing the heating return process of FIG.
- the RAM 504 stores a heating return injection amount counter value. After clearing the heating return injection amount counter value, the CPU 502 integrates the amount of fuel injected from the fuel injection device 115 and stores the integration result in the RAM 504 as a count heating return injection amount counter value. In addition, a heating return injection amount to be described later is stored in advance in the ROM 503 or the RAM 504.
- the CPU 502 reads the heating return processing state from the RAM 504 (step S41), and determines whether or not the read heating return processing state is being executed (step S42).
- step S43 it is determined whether or not the heating return counter value is equal to or greater than the heating return injection amount.
- the heating return injection amount is an injection amount of fuel necessary for discharging air mixed in the fuel in the fuel pipe 132 and the fuel heating device 114 from the fuel injection device 115.
- the CPU 502 stores the completion as the heating return processing state in the RAM 504 (step S44), and proceeds to step S26 in FIG.
- the CPU 502 stores the current state as the heating return processing state in the RAM 504 (step S45), and proceeds to step S26 in FIG.
- step S42 If the heating return processing state has been executed in step S42, the CPU 502 stores the completion in the RAM 504 as the heating return processing state (step S44), and proceeds to step S26 in FIG.
- FIG. 11 is a flowchart showing the heating prohibition process of FIG.
- the CPU 502 clears the heating return injection amount counter value stored in the RAM 504 (step S51). As described above, after clearing the heating return injection amount counter value, the CPU 502 integrates the amount of fuel injected from the fuel injection device 115 and stores the integration result in the RAM 504 as a count heating return injection amount counter value. Next, the CPU 502 stores the heat recovery process state in progress in the RAM 504 (step S52), and proceeds to the process of step S29 in FIG.
- the fuel pipe 132 is provided when the fuel heating condition is satisfied and the result of the fuel heating prohibition determination process is heating permission.
- the fuel inside is heated by the fuel heating device 114. Thereby, the starting characteristic of the engine 110 is improved.
- the result of the fuel heating prohibition determination process is heating prohibition.
- the fuel heating device 114 does not operate, the fuel in the fuel pipe 132 is not heated.
- the fuel remaining amount determination result is prohibited when the side stand 120 is in a grounded state and the remaining amount of fuel in the fuel tank 130 is equal to or lower than the first threshold value.
- the fuel remaining amount in the fuel tank 130 is equal to or smaller than the second threshold value in the non-grounded state of 120, the fuel remaining amount determination result is prohibited.
- the result of the fuel heating prohibition determination process is the heating prohibition, and the fuel heating device 114 does not operate. Therefore, the fuel in the fuel pipe 132 is not heated. In this case, it is accurately determined whether fuel is present or insufficient at the suction port 134 of the fuel pump 131 according to the grounding state and the non-grounding state of the side stand 120.
- the remaining fuel amount is determined.
- the result returns from prohibition to permission.
- the remaining fuel amount determination result is permitted from the prohibition.
- the side stand 120 is brought into the non-grounded state and the fuel remaining amount in the fuel tank 130 is the second remaining amount.
- the remaining fuel amount determination result returns from prohibition to permission.
- the result of the fuel heating prohibition determination process is prohibited from heating until the fuel of the heating return injection amount is injected from the fuel injection device 115. Thereby, it is possible to prevent the fuel in the fuel pipe 132 from being heated by the fuel heating device 114 in a state where air is mixed into the fuel in the fuel pipe 132.
- the fuel heating condition is not satisfied. Thereby, it is possible to prevent the temperature of the fuel injected into the engine 110 from becoming excessively high.
- the starting characteristics of the engine 110 can be improved and the fuel in the fuel pipe 132 can be reliably prevented from being overheated.
- the inclination of the motorcycle 1 is detected based on whether the motorcycle 1 is overturned and the state of the side stand 120.
- the present invention is not limited to this.
- the inclination of the motorcycle 1 may be detected based only on whether the motorcycle 1 has fallen over, or the inclination of the motorcycle 1 may be detected based only on the state of the side stand 120.
- the inclination of the motorcycle 1 may be detected by another detection unit such as an acceleration sensor, and the fuel heating device 114 may be controlled based on the detection result.
- the fuel heating device 114 is controlled based on the fuel heating condition and the result of the fuel heating prohibition determination process, but the present invention is not limited to this.
- the fuel heating device 114 may be controlled based on the result of the fuel heating prohibition determination process without determining the fuel heating condition.
- the fuel heating condition is determined based on the temperature of the engine 110 and the intake air temperature, but the present invention is not limited to this.
- the fuel heating condition may be determined based on other temperatures such as the exhaust temperature.
- the main body frame 101 is an example of the main body
- the engine 110 is an example of the engine
- the fuel injection device 115 is an example of the fuel injection device
- the fuel tank 130 is an example of the fuel tank
- the suction port 134 is an example of a suction port
- the fuel pump 131 is an example of a fuel pump
- the side stand 120 or the fall sensor SE3 is an example of a tilt detection unit
- the ECU 150 is an example of a control unit.
- the heating return injection amount is an example of a predetermined amount
- the side stand 120 is an example of a side stand
- the side stand switch SW is an example of a side stand state detection unit
- the fuel remaining amount sensor SE4 is a fuel remaining amount detection unit.
- the fall sensor SE3 is an example of a fall detection unit
- the engine temperature sensor SE1 or the intake air temperature sensor SE2 is an example of an ambient temperature detection unit
- the temperature of the engine 110 or the intake air temperature is injected by the fuel injection device. This is an example of the temperature around the fuel.
- the present invention can be used for a motorcycle having a function of heating fuel.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
- Auxiliary Drives, Propulsion Controls, And Safety Devices (AREA)
- Air-Conditioning For Vehicles (AREA)
Abstract
Description
図1は本実施の形態に係る自動二輪車を示す概略側面図である。図2は図1の自動二輪車の一部の拡大図である。
図3、図4および図5は燃料タンク130の内部の構成を示す断面図である。図3および図4は自動二輪車1の前後方向に垂直な縦断面を示し、図5は自動二輪車1の前後方向に平行な縦断面を示す。また、図3は自動二輪車1が垂直状態にある場合の燃料タンク130の内部の状態を示し、図4は自動二輪車1が転倒している場合の燃料タンク130の内部の状態を示す。図3~図5において、自動二輪車1の前後方向を矢印FWで示し、重力方向に平行な方向を矢印Zで示す。
図6は図1の自動二輪車1の制御系の構成を示すブロック図である。図6に示すように、ECU150は、I/F(インターフェース)501,505、CPU(中央演算処理装置)502、ROM(リードオンリメモリ)503およびRAM(ランダムアクセスメモリ)504を含む。
図7はメインスイッチがオンされた後のECU150による燃料加熱装置114の制御動作を示すフローチャートである。
上記のように、本実施の形態に係る自動二輪車1においては、燃料加熱条件が成立しかつ燃料加熱禁止判定処理の結果が加熱許可である場合に、燃料配管132内の燃料が燃料加熱装置114により加熱される。それにより、エンジン110の始動特性が向上する。
上記実施の形態では、自動二輪車1の傾斜が自動二輪車1の転倒の有無およびサイドスタンド120の状態に基づいて検出されるが、これに限定されない。例えば、自動二輪車1の傾斜が自動二輪車1の転倒の有無のみに基づいて検出されてもよく、自動二輪車1の傾斜がサイドスタンド120の状態のみに基づいて検出されてもよい。
以下、請求項の各構成要素と実施の形態の各要素との対応の例について説明するが、本発明は下記の例に限定されない。
Claims (6)
- 前輪および後輪を支持する本体部と、
前記本体部に設けられるエンジンと、
前記エンジンに設けられる燃料噴射装置と、
前記本体部に設けられる燃料タンクと、
前記燃料タンク内に吸い込み口を有し、前記燃料タンク内の燃料を燃料配管を通して前記燃料噴射装置に供給する燃料ポンプと、
前記燃料配管内の燃料を加熱する燃料加熱装置と、
前記本体部の傾斜を検出する傾斜検出部と、
前記燃料加熱装置を制御する制御部とを備え、
前記制御部は、前記傾斜検出部の検出結果に基づいて、前記燃料ポンプの前記吸い込み口に燃料が存在する第1の状態と前記燃料ポンプの前記吸い込み口の燃料が不足する第2の状態とを検出し、前記第2の状態を検出した場合に前記燃料加熱装置の作動を禁止する、自動二輪車。 - 前記制御部は、
前記第2の状態から前記第1の状態への移行を検出した場合に、前記第1の状態への移行後に前記燃料加熱装置から予め定められた量の燃料が噴射されたか否かを判定し、予め定められた量の燃料が噴射されるまで前記燃料加熱装置の作動を禁止する、請求項1記載の自動二輪車。 - 前記本体部を地面に対して傾斜状態で支持するサイドスタンドと、
前記サイドスタンドが接地状態であるか非接地状態であるかを検出するサイドスタンド状態検出部と、
前記燃料タンク内の燃料残量を検出する燃料残量検出部とをさらに備え、
前記制御部は、
前記サイドスタンド状態検出部により前記接地状態が検出されかつ前記燃料残量検出部により検出される燃料残量が予め定められた第1のしきい値以下である場合を前記第2の状態として検出し、前記サイドスタンド状態検出部により前記非接地状態が検出されかつ前記燃料残量検出部により検出される燃料残量が予め定められた第2のしきい値以下である場合を前記第2の状態として検出する、請求項1記載の自動二輪車。 - 前記自動二輪車の転倒を検出する転倒検出部をさらに備え、
前記制御部は、
前記転倒検出部により転倒が検出された場合を前記第2の状態として検出する、請求項1記載の自動二輪車。 - 前記燃料噴射装置から噴射される燃料の周囲の温度を検出する周囲温度検出部をさらに備え、
前記制御部は、
前記周囲温度検出部により検出される温度が予め定められた温度以上の場合に前記燃料加熱装置の作動を禁止し、前記周囲温度検出部により検出される温度が予め定められた温度よりも低くかつ前記第1の状態を検出した場合に前記燃料加熱装置の作動を許可する、請求項1記載の自動二輪車。 - 前記周囲温度検出部は、前記周囲の温度として前記エンジンの温度および前記エンジンに吸入される空気の温度の少なくとも一方を検出する、請求項1記載の自動二輪車。
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EP11846636.6A EP2650198B1 (en) | 2010-12-06 | 2011-03-24 | Automatic two-wheeled vehicle |
BR112013004232-0A BR112013004232B1 (pt) | 2010-12-06 | 2011-03-24 | Motocicleta com aquecimento de combustível |
JP2012547670A JP5493013B2 (ja) | 2010-12-06 | 2011-03-24 | 自動二輪車 |
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