Motorcycle engine variable air inlet electronic control method and system

Abstract

The invention discloses a variable air inlet electronic control method and system of a motorcycle engine, and aims to solve the problems of phase accuracy and execution responsiveness of a switching control method of two groups of camshafts, and the method comprises the following steps: S1, after a QVVA control unit is electrified, detecting whether a fault influencing QVVA exists, and if not, entering S2; s2, judging whether the rotating speed and the temperature recognized by the QVVA control unit reach starting conditions or not, if yes, starting pre-starting and entering S3, and if not, entering S4; s3, judging whether the accumulated number of recognition times meets working conditions or not, if yes, starting to work by a QVVA electromagnetic valve, and executing oil injection ignition control in a second cam mode; and S4, whether quitting is carried out from the QVVA execution working condition or not is judged, if yes, quitting is carried out according to a preset mode, the first cam working mode is executed, and if not, oil injection ignition in the first cam mode continues to be executed. According to the electromagnetic control valve, the oil injection phase, the pulse width, the ignition energy and the ignition angle can be accurately controlled, and the responsiveness and the reliability of the electromagnetic control valve in the working process are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of motorcycle engines, and in particular to a variable air intake electronic control method and system for a motorcycle engine. Background Art

[0002] The variable valve lift technology control of motorcycle high-speed engines controls the working status of two sets of camshafts and selects the appropriate valve lift according to the engine operating conditions to improve engine power and reduce fuel consumption. In medium and low load conditions, low-lift cams are used to ensure power and fuel consumption; in high load conditions, high-lift cams are used to improve power.

[0003] During the switching process of the two camshafts of the existing motorcycle engine VVA, due to the sudden change of working conditions, if the phase moment of the switching of the two camshafts cannot be accurately controlled, it will cause transient combustion and emission degradation, resulting in poor power response and power output, and then affect the driving experience. Summary of the invention

[0004] The present invention solves the problems of phase accuracy and execution responsiveness in the two-group camshaft switching control method, and proposes a variable intake electronic control method and system for a motorcycle engine, which can accurately control the injection phase and pulse width, ignition energy and ignition angle, and improve the responsiveness and reliability of the electromagnetic control valve during operation.

[0005] In order to achieve the above object, the present invention adopts the following technical solution: a variable intake electronic control method for a motorcycle engine, comprising the following steps: S1, after the QVVA control unit is powered on, it detects whether there is a fault that affects the QVVA. If not, it enters S2; S2, determine whether the speed and temperature recognized by the QVVA control unit meet the start-up conditions. If so, start pre-start and enter S3. If not, enter S4. S3, judging whether the cumulative number of identifications meets the working conditions, if so, the QVVA solenoid valve starts to work and executes the injection ignition control under the second cam mode; S4, determine whether to exit from the QVVA execution mode, if so, exit according to the preset mode and execute the No. 1 cam working mode, if not, continue to execute the injection ignition under the No. 1 cam mode.

[0006] In the present technical solution, the QVVA control unit is first powered on, and then it is determined whether there is a fault that affects QVVA. If there is a fault, it is necessary to execute according to the default procedure. If there is no fault, it is determined whether the speed and temperature conditions obtained by the QVVA control unit meet the standards. If so, pre-start is performed, and it is determined whether the cumulative number of identifications meets the standards. If it meets the standards, the injection ignition control under the No. 2 cam mode is executed. If it does not meet the standards, it returns to step S2; if the speed and temperature conditions obtained by the QVVA control unit do not meet the standards, it exits from the QVVA execution condition and executes the No. 1 cam working mode according to the preset mode exit mode.

[0007] The present invention is further configured as follows: Step S2 includes: the QVVA control unit determines the speed and temperature according to the values ​​of the crankshaft position sensor, the engine cylinder head temperature sensor and the throttle position sensor, and determines whether the start condition is met according to the determined speed and temperature.

[0008] In the technical solution, the above-mentioned crankshaft position sensor, engine cylinder head temperature sensor and throttle position sensor are arranged at corresponding positions of corresponding devices.

[0009] The present invention is further configured as follows: Step S3 comprises: The QVVA control unit continuously identifies and locks the phase of the crankshaft position sensor, and the QVVA control unit sends a first pre-control signal to make the QVVA solenoid valve run to a corresponding position; When the QVVA control unit identifies that the number of times the crankshaft phase is locked meets the conditions, the QVVA control unit sends a second pre-control signal, and the QVVA solenoid valve is fully opened at the camshaft base circle position.

[0010] In the technical solution, the QVVA control unit controls the QVVA solenoid valve through the first pre-control signal and the second pre-control signal.

[0011] The present invention is further configured as follows: S4 includes: When the speed and temperature recognized by the QVVA control unit do not meet the start-up conditions, it is determined whether to exit the QVVA execution condition. If the QVVA execution condition is exited, the No. 1 cam working mode is executed.

[0012] In this technical solution, when the opening condition is not met, the above steps are executed.

[0013] The present invention is further configured as follows: Step S1 comprises: Determine whether the QVVA control unit is powered on. If so, determine whether there is a fault that affects the QVVA. If not, start over.

[0014] In this technical solution, after it is determined that the QVVA control unit is powered on, the self-checking work starts.

[0015] The present invention is further configured as follows: the QVVA solenoid valve is fully opened, the QVVA solenoid valve drives the push rod, so that the engine valve mechanism switches to the second valve drive rocker arm to work, drives the engine valve lift to increase, and increases the engine's air intake volume; the QVVA control unit calculates the opening time of the QVVA solenoid valve, advances the high-lift valve intake by one circle, pre-adjusts the injection phase and injection amount, and adjusts the ignition angle.

[0016] In this technical solution, the engine can be put into optimal working condition through the above process.

[0017] A motorcycle engine variable air intake electronic control system is applicable to the above-mentioned motorcycle engine variable air intake electronic control method, including a QVVA control unit, wherein the QVVA control unit is respectively connected to an execution unit and a detection unit, wherein the detection unit obtains a detection value and sends it to the QVVA control unit, and the QVVA control unit controls the execution unit through a control signal.

[0018] The present technical solution mainly includes a QVVA control unit, an execution unit and a detection unit, and the above-mentioned electric control process is completed through the coordinated action of the QVVA control unit, the execution unit and the detection unit.

[0019] The present invention is further configured as follows: the QVVA control unit is an ECU or a QVVA controller, and the detection unit includes a plurality of sensors.

[0020] In this technical solution, the sensors mainly include a crankshaft position sensor, an engine cylinder head temperature sensor, a throttle position sensor, an oxygen sensor and an intake pressure sensor.

[0021] The present invention is further configured as follows: the execution unit includes a QVVA solenoid valve, a fuel injector and an ignition coil.

[0022] The present invention can bring the following beneficial effects: The invention relates to a variable intake electronic control method for a motorcycle engine, which can accurately control the injection phase and pulse width, ignition energy and ignition angle, and improve the responsiveness and reliability of the electromagnetic control valve during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a flow chart of the main part of a variable intake electronic control method for a motorcycle engine of the present application.

[0024] Figure 2 This is a flow chart of the supplementary part of a variable air intake electronic control method for a motorcycle engine of the present application. DETAILED DESCRIPTION

[0025] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific implementation method described herein is only an optimal embodiment of the present invention, which is only used to explain the present invention and does not limit the scope of protection of the present invention. All other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0026] The variable valve lift technology control of motorcycle high-speed engines controls the working status of two sets of camshafts and selects the appropriate valve lift according to the engine operating conditions to improve engine power and reduce fuel consumption. In medium and low load conditions, low-lift cams are used to ensure power and fuel consumption; in high load conditions, high-lift cams are used to improve power.

[0027] In the existing motorcycle engine VVA two-set camshaft switching project, due to sudden changes in operating conditions, if the phase timing of the two sets of cam switching cannot be accurately controlled, it will cause transient combustion and emission degradation, resulting in poor power response and power output, and then affect the driving experience.

[0028] Example 1 In order to solve the problems of phase accuracy and execution responsiveness of the two camshaft switching control strategies in the control process of the variable intake system of the existing motorcycle engine, this embodiment proposes a variable intake electronic control method for a motorcycle engine, which accurately controls the injection phase and pulse width, ignition energy and ignition angle, and improves the responsiveness and safety reliability of the electromagnetic control valve during operation.

[0029] refer to Figure 1 and Figure 2 , which mainly includes the following steps.

[0030] In step S1, the QVVA control unit is first powered on, and then it is detected and determined whether there is a fault that affects QVVA. If there is a fault that affects QVVA, the system will execute according to the preset program. If there is no fault that affects QVVA, it will enter step S2.

[0031] In more detail, this step also includes a judgment on whether the QVVA control unit is powered on. If after judgment, the QVVA control unit is powered on, a subsequent judgment is made on whether there is a fault that affects QVVA. If after judgment, the QVVA control unit is not powered on, it is necessary to repeat step S1 to re-power on the unit.

[0032] In this embodiment, after it is determined that the QVVA control unit is powered on, a self-check operation is started.

[0033] The self-check of this embodiment is mainly for fault detection, that is, to detect and determine whether there is a fault related to QVVA. If a corresponding fault is detected, it is necessary to execute according to the preset program. If no fault is detected, it goes to step S2.

[0034] In step S2, the QVVA control unit first identifies the corresponding speed and temperature conditions, and then compares the identified speed and temperature conditions with the start-up conditions to determine whether to pre-start. If pre-start is performed, it enters step S3. If not, it directly enters step S4.

[0035] The above steps mainly include the following processes: the QVVA control unit identifies the corresponding values ​​through the crankshaft position sensor, the engine cylinder head temperature sensor and the throttle position sensor, and then determines the corresponding speed and temperature, and compares the determined speed and temperature with the above-mentioned start-up conditions, and determines whether to pre-start based on the comparison results.

[0036] In more detail, the above-mentioned opening conditions are preset, and the opening conditions can be set according to actual conditions.

[0037] In this embodiment, the start-up conditions are that the rotation speed is greater than 7000 rpm and the temperature is greater than 50°C.

[0038] Step S3, after pre-start, determine whether the cumulative number of identifications can meet the working conditions. If the working conditions are met, the QVVA solenoid valve starts to work and executes the injection ignition control under the No. 2 cam mode.

[0039] In the present technical solution, the QVVA control unit continuously identifies and locks the phase of the crankshaft position sensor, and the QVVA control unit sends a first pre-control signal to make the QVVA run to a certain position; when the number of crankshaft phases identified and locked by the QVVA control unit meets the preset conditions, the QVVA control unit sends a second pre-control signal to make the QVVA solenoid valve fully open at the camshaft base circle position.

[0040] The QVVA solenoid valve is fully opened, and the QVVA solenoid valve drives the push rod, so that the engine valve train switches to the second valve drive rocker arm, drives the engine valve lift to increase, and increases the engine's air intake; the QVVA control unit calculates the opening time of the QVVA solenoid valve, and pre-adjusts the injection phase and injection amount one circle in advance of the high-lift valve intake, and adjusts the ignition angle to keep the engine working in the best condition.

[0041] In the technical solution, the QVVA control unit controls the QVVA solenoid valve through the first pre-control signal and the second pre-control signal.

[0042] Step S4, if the speed and temperature do not reach the start-up conditions, then determine whether it is necessary to exit from the QVVA execution condition. If so, exit according to the preset mode and execute the No. 1 cam working mode. If not, continue to execute the injection ignition under the No. 1 cam mode.

[0043] In more detail, after the speed and temperature recognized by the QVVA control unit do not meet the start-up conditions, it is determined whether to exit the QVVA execution condition. If the QVVA execution condition is exited, the No. 1 cam working mode is executed.

[0044] In the present technical solution, the QVVA control unit is first powered on, and then it is determined whether there is a fault that affects QVVA. If there is a fault, it is necessary to execute according to the default procedure. If there is no fault, it is determined whether the speed and temperature conditions obtained by the QVVA control unit meet the standards. If so, pre-start is performed, and it is determined whether the cumulative number of identifications meets the standards. If it meets the standards, the injection ignition control under the No. 2 cam mode is executed. If it does not meet the standards, it returns to step S2; if the speed and temperature conditions obtained by the QVVA control unit do not meet the standards, it exits from the QVVA execution condition and executes the No. 1 cam working mode according to the preset mode exit mode.

[0045] In the above control method, if any crankshaft speed and crankshaft phase recognition error occurs, the QVVA control unit will not drive the QVVA solenoid valve to work until the number of times the crankshaft phase is recognized and locked meets the conditions.

[0046] The working principle and advantages of this application are described in detail here.

[0047] A variable intake electronic control method for a motorcycle engine of the present application adopts a pre-control method compared to a traditional solenoid valve switch control method. When the QVVA solenoid valve does not reach a preset speed point, the QVVA control unit will give the QVVA solenoid valve a preset 2V control voltage, which can make the QVVA solenoid valve enter a waiting working mode, apply an initial very small force to the shaft pin, so that the shaft pin is maintained in a preset working position, which can effectively reduce the vibration of the shaft pin, and at the same time ensure that when the working conditions are met, the shaft pin is quickly pushed to the working position by the solenoid valve, so as to achieve the purpose of quickly switching to high camshaft operation.

[0048] At the same time, the above-mentioned preset voltage can ensure that the QVVA solenoid valve will not generate excessive current and working delay when working, and can work on demand according to the starting working conditions, without causing energy waste and saving costs.

[0049] When the preset working condition of the QVVA solenoid valve is reached, the QVVA solenoid valve is first given a 10% duty cycle for pre-starting, and the shaft pin return spring is formally compressed to ensure that the solenoid valve enters the formal Redy moment. At this time, after waiting for the engine to run for 9 circles, the solenoid valve is given a 70% duty cycle control (due to the fixed working mode of the mechanical structure, 9 circles can ensure that the shaft pin runs to the required position), and the high cam is driven to operate. At the same time, QVVA tells the ECU to start switching the ignition advance angle to the high cam working ignition advance angle mode. At this time, the engine's intake volume is rapidly increased, and at the same time, QVVA starts to tell the ECU to increase the fuel injection amount to meet the engine's mixture ratio requirements.

[0050] At the end of the engine high cam working mode, that is, the engine exits the QVVA solenoid valve working range, QVVA begins to cancel 70% of the duty cycle control and return to 2.3V voltage operation. At this time, the QVVA shaft pin will return to the initial preset working position under the action of the reset spring. Restoring to the 2.3V working voltage without completely cutting off the control of the solenoid valve can prepare for the next entry of the QVVA solenoid valve, and also avoid the large current shock and working delay caused by powering on again after completely powering off, causing the QVVA solenoid valve to respond slowly.

[0051] This embodiment can bring the following technical effects: accurately control the injection phase and pulse width, ignition energy and ignition angle, and improve the responsiveness, safety and reliability of the electromagnetic control valve during operation.

[0052] Example 2 This embodiment provides a variable intake electronic control method for a motorcycle engine, referring to Figure 1 and Figure 2 , which mainly includes the following steps.

[0053] In step S1, the QVVA control unit is first powered on, and then it is detected and determined whether there is a fault that affects QVVA. If there is a fault that affects QVVA, the system will execute according to the preset program. If there is no fault that affects QVVA, it will enter step S2.

[0054] In more detail, this step also includes a judgment on whether the QVVA control unit is powered on. If after judgment, the QVVA control unit is powered on, a subsequent judgment is made on whether there is a fault that affects QVVA. If after judgment, the QVVA control unit is not powered on, it is necessary to repeat step S1 to re-power on the unit.

[0055] In this embodiment, after it is determined that the QVVA control unit is powered on, a self-check operation is started.

[0056] The self-check of this embodiment is mainly for fault detection, that is, to detect and determine whether there is a fault related to QVVA. If a corresponding fault is detected, it is necessary to execute according to the preset program. If no fault is detected, it goes to step S2.

[0057] In step S2, the QVVA control unit first identifies the corresponding speed and temperature conditions, and then compares the identified speed and temperature conditions with the start-up conditions to determine whether to pre-start. If pre-start is performed, it enters step S3. If not, it directly enters step S4.

[0058] The above steps mainly include the following processes: the QVVA control unit identifies the corresponding values ​​through the crankshaft position sensor, the engine cylinder head temperature sensor and the throttle position sensor, and then determines the corresponding speed and temperature, and compares the determined speed and temperature with the above-mentioned start-up conditions, and determines whether to pre-start based on the comparison results.

[0059] In more detail, the above-mentioned opening conditions are preset, and the opening conditions can be set according to actual conditions.

[0060] In this embodiment, the start-up conditions are that the rotation speed is greater than 7000 rpm and the temperature is greater than 50°C.

[0061] Step S3, after pre-start, determine whether the cumulative number of identifications can meet the working conditions. If the working conditions are met, the QVVA solenoid valve starts to work and executes the injection ignition control under the No. 2 cam mode.

[0062] In the present technical solution, the QVVA control unit continuously identifies and locks the phase of the crankshaft position sensor, and the QVVA control unit sends a first pre-control signal to make the QVVA run to a certain position; when the number of crankshaft phases identified and locked by the QVVA control unit meets the preset conditions, the QVVA control unit sends a second pre-control signal to make the QVVA solenoid valve fully open at the camshaft base circle position.

[0063] The QVVA solenoid valve is fully opened, and the QVVA solenoid valve drives the push rod, so that the engine valve train switches to the second valve drive rocker arm, drives the engine valve lift to increase, and increases the engine's air intake; the QVVA control unit calculates the opening time of the QVVA solenoid valve, and pre-adjusts the injection phase and injection amount one circle in advance of the high-lift valve intake, and adjusts the ignition angle to keep the engine working in the best condition.

[0064] In the technical solution, the QVVA control unit controls the QVVA solenoid valve through the first pre-control signal and the second pre-control signal.

[0065] Step S4, if the speed and temperature do not reach the start-up conditions, then determine whether it is necessary to exit from the QVVA execution condition. If so, exit according to the preset mode and execute the No. 1 cam working mode. If not, continue to execute the injection ignition under the No. 1 cam mode.

[0066] In more detail, after the speed and temperature recognized by the QVVA control unit do not meet the start-up conditions, it is determined whether to exit the QVVA execution condition. If the QVVA execution condition is exited, the No. 1 cam working mode is executed.

[0067] In the present technical solution, the QVVA control unit is first powered on, and then it is determined whether there is a fault that affects QVVA. If there is a fault, it is necessary to execute according to the default procedure. If there is no fault, it is determined whether the speed and temperature conditions obtained by the QVVA control unit meet the standards. If so, pre-start is performed, and it is determined whether the cumulative number of identifications meets the standards. If it meets the standards, the injection ignition control under the No. 2 cam mode is executed. If it does not meet the standards, it returns to step S2; if the speed and temperature conditions obtained by the QVVA control unit do not meet the standards, it exits from the QVVA execution condition and executes the No. 1 cam working mode according to the preset mode exit mode.

[0068] In the above control method, if any crankshaft speed and crankshaft phase recognition error occurs, the QVVA control unit will not drive the QVVA solenoid valve to work until the number of times the crankshaft phase is recognized and locked meets the conditions.

[0069] The working principle and advantages of this application are described in detail here.

[0070] A variable intake electronic control method for a motorcycle engine of the present application adopts a pre-control method compared to a traditional solenoid valve switch control method. When the QVVA solenoid valve does not reach a preset speed point, the QVVA control unit will give the QVVA solenoid valve a preset 2V control voltage, which can make the QVVA solenoid valve enter a waiting working mode, apply an initial very small force to the shaft pin, so that the shaft pin is maintained in a preset working position, which can effectively reduce the vibration of the shaft pin, and at the same time ensure that when the working conditions are met, the shaft pin is quickly pushed to the working position by the solenoid valve, so as to achieve the purpose of quickly switching to high camshaft operation.

[0071] At the same time, the above-mentioned preset voltage can ensure that the QVVA solenoid valve will not generate excessive current and working delay when working, and can work on demand according to the starting working conditions, without causing energy waste and saving costs.

[0072] When the preset working condition of the QVVA solenoid valve is reached, the QVVA solenoid valve is first given a 10% duty cycle for pre-starting, and the shaft pin return spring is formally compressed to ensure that the solenoid valve enters the formal Redy moment. At this time, after waiting for the engine to run for 9 circles, the solenoid valve is given a 70% duty cycle control (due to the fixed working mode of the mechanical structure, 9 circles can ensure that the shaft pin runs to the required position), and the high cam is driven to operate. At the same time, QVVA tells the ECU to start switching the ignition advance angle to the high cam working ignition advance angle mode. At this time, the engine's intake volume is rapidly increased, and at the same time, QVVA starts to tell the ECU to increase the fuel injection amount to meet the engine's mixture ratio requirements.

[0073] At the end of the engine high cam working mode, that is, the engine exits the QVVA solenoid valve working range, QVVA begins to cancel 70% of the duty cycle control and return to 2.3V voltage operation. At this time, the QVVA shaft pin will return to the initial preset working position under the action of the reset spring. Restoring to the 2.3V working voltage without completely cutting off the control of the solenoid valve can prepare for the next entry of the QVVA solenoid valve, and also avoid the large current shock and working delay caused by powering on again after completely powering off, causing the QVVA solenoid valve to respond slowly.

[0074] This embodiment can bring the following technical effects: accurately control the injection phase and pulse width, ignition energy and ignition angle, and improve the responsiveness, safety and reliability of the electromagnetic control valve during operation.

[0075] On the basis of the above, this embodiment also proposes a motorcycle engine variable intake electronic control system, which mainly includes a QVVA control unit, an execution unit and a detection unit. The execution unit, the QVVA control unit and the detection unit are connected in sequence. The detection unit can obtain the detection value and send the value to the QVVA control unit. The QVVA control unit can control the execution unit through a control signal. The above electronic control process is completed through the synergy of the QVVA control unit, the execution unit and the detection unit.

[0076] In this embodiment, the QVVA control unit is mainly an ECU or a QVVA controller. The detection unit is mainly a sensor, which mainly includes a crankshaft position sensor, an engine cylinder head temperature sensor, a throttle position sensor, an oxygen sensor and an intake pressure sensor.

[0077] The execution unit mainly includes QVVA solenoid valve, injector and ignition coil.

[0078] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention is described in detail with reference to the embodiments, it should be understood by those skilled in the art that any modification or equivalent replacement of the technical solutions of the present invention does not depart from the spirit and scope of the technical solutions of the present invention and should be included in the scope of the claims of the present invention.

Claims

1. A variable air intake electronic control method for a motorcycle engine, characterized in that: The following steps are involved: S1, after the QVVA control unit is powered on, it detects whether there is a fault that affects the QVVA. If not, it enters S2; S2, determine whether the speed and temperature recognized by the QVVA control unit meet the start-up conditions. If so, pre-start and enter S3, if not, enter S4; S3, judging whether the cumulative number of identifications meets the working conditions, if so, the QVVA solenoid valve starts to work and executes the injection ignition control under the second cam mode; S4, determine whether to exit from the QVVA execution mode, if so, exit according to the preset mode and execute the No. 1 cam working mode, if not, continue to execute the injection ignition under the No. 1 cam mode.

2. A motorcycle engine variable intake electronic control method according to claim 1, characterized in that: The step S2 includes: the QVVA control unit determines the speed and temperature according to the values ​​of the crankshaft position sensor, the engine cylinder head temperature sensor and the throttle position sensor, and determines whether the opening condition is met according to the determined speed and temperature.

3. A motorcycle engine variable intake electronic control method according to claim 1 or 2, characterized in that: The step S3 comprises: The QVVA control unit continuously identifies and locks the phase of the crankshaft position sensor, and the QVVA control unit sends a first pre-control signal to make the QVVA solenoid valve run to a corresponding position.

4. A motorcycle engine variable intake electronic control method according to claim 3, characterized in that: The step S3 further comprises: When the QVVA control unit identifies that the number of times the crankshaft phase is locked meets the conditions, the QVVA control unit sends a second pre-control signal, and the QVVA solenoid valve is fully opened at the camshaft base circle position.

5. A motorcycle engine variable intake electronic control method according to claim 1 or 2, characterized in that: The S4 includes: When the speed and temperature recognized by the QVVA control unit do not meet the start-up conditions, it is determined whether to exit the QVVA execution condition. If the QVVA execution condition is exited, the No. 1 cam working mode is executed.

6. A motorcycle engine variable intake electronic control method according to claim 1, characterized in that: The step S1 comprises: Determine whether the QVVA control unit is powered on. If so, determine whether there is a fault that affects the QVVA. If not, start over.

7. A motorcycle engine variable intake electronic control method according to claim 4, characterized in that: The QVVA solenoid valve is fully opened, and the QVVA solenoid valve drives the push rod, so that the engine valve train switches to the second valve drive rocker arm, drives the engine valve lift to increase, and increases the engine's air intake volume; the QVVA control unit calculates the opening time of the QVVA solenoid valve, and pre-adjusts the injection phase and injection amount one circle in advance of the high-lift valve intake, and adjusts the ignition angle.

8. A motorcycle engine variable air intake electronic control system, applicable to a motorcycle engine variable air intake electronic control method according to any one of claims 1 to 7, characterized in that: It includes a QVVA control unit, which is respectively connected to an execution unit and a detection unit. The detection unit obtains a detection value and sends it to the QVVA control unit. The QVVA control unit controls the execution unit through a control signal.

9. A motorcycle engine variable intake electronic control system according to claim 8, characterized in that: The QVVA control unit is an ECU or a QVVA controller, and the detection unit includes a plurality of sensors.

10. A motorcycle engine variable intake electronic control system according to claim 8 or 9, characterized in that: The execution unit includes a QVVA solenoid valve, a fuel injector and an ignition coil.

Images