A method for optimizing engine hood closing comfort

Abstract

The present invention relates to the field of vehicle ergonomics and perceived quality technology, and specifically to a method for optimizing the comfort of engine hood closing. The method comprises the following steps: determining the closing speed of the hood locking initial position according to the rotation angle of the hood from the locking initial position to the locking position, the hood weight, and the negative work done by the hood lock and the hood closing accessories; determining the initial height of the free fall when the hood is closed according to the closing speed of the hood locking initial position; judging whether the initial height of the free fall when the hood is closed is within a set range, and if not, adjusting the hood weight, the design parameters of the hood lock and / or the design parameters of the hood closing accessories until the initial height is within the set range. It can solve the problem in the prior art that if the hood is difficult to close after the prototype vehicle comes out, the hood closing comfort is improved by optimizing the support reaction force step by step to verify, and there are problems of delayed control nodes and increased change costs.

Description

Technical Field

[0001] The invention relates to the technical field of vehicle ergonomics and perceived quality, and in particular to a method for optimizing the closing comfort of an engine hood. Background Art

[0002] The human-machine control comfort of automobile opening parts belongs to the field of ergonomics and perceived quality. The human-machine control comfort of automobile opening parts is an important factor affecting customer purchase and subsequent brand recognition. Major OEMs have invested a lot of time and energy to continuously research and improve the control comfort of products to enhance the competitiveness of their products. After years of baptism in the automobile market, Chinese consumers have gradually transitioned from being able to drive to being good at driving, and have also put forward higher demands on the soft power of automobile driving experience, static experience, and humanized operation.

[0003] The existing technology does not have a complete design control and optimization method for the closing comfort of the engine hood system during the design stage. Usually, the closing comfort performance of the engine hood is evaluated after the trial vehicle is installed. If problems such as difficulty in closing the engine hood occur, the internal parts of the engine hood system are optimized. The optimization and verification cycle is long and the cost is high.

[0004] The existing technology generally calculates and controls the static locking force of the hood during the design phase, and then evaluates the comfort of the hood closing after the prototype vehicle is manufactured. However, the actual closing process of the hood is not achieved by slowly pressing statically, but by the hood movement impact that closes the hood after a certain amount of energy is applied by the human hand. The amount of energy applied by the human hand directly affects people's perception of the comfort of closing the hood, so it is not comprehensive and objective to evaluate the closing comfort performance of the hood only by calculating the static locking force. After the prototype vehicle comes out, if it is found that the hood is difficult to close, the comfort of the hood closing is improved by optimizing the support reaction force step by step. The control nodes are delayed, there are problems with change costs, and there is a problem of poor end-customer perception experience due to the inability to complete improvements before mass production. Summary of the invention

[0005] In view of the defects existing in the prior art, the purpose of the present invention is to provide a method for optimizing the comfort of engine hood closing, which can solve the problem in the prior art that if it is found that the hood is difficult to close after the prototype car comes out, the hood closing comfort can be improved by optimizing the support reaction force and gradually verifying it, resulting in delayed control nodes and increased change costs.

[0006] In order to achieve the above purpose, the technical solution adopted by the present invention is:

[0007] The present invention provides a method for optimizing the closing comfort of an engine hood, comprising the following steps:

[0008] Determine the closing speed of the hood at the initial locking position based on the rotation angle of the hood from the initial locking position to the locked position, the weight of the hood, and the negative work done by the hood lock and the hood closing accessories;

[0009] According to the closing speed of the hood in the initial locked position, determine the initial free fall height of the hood when it is closed;

[0010] Determine whether the initial free-fall height when the hood is closed is within a set range. If not, adjust the hood weight, the design parameters of the hood lock and / or the design parameters of the hood closing accessories until the initial height is within the set range.

[0011] In some optional solutions, when the hood closing accessories include a buffer block, a limit block, a hood hinge and a sealing strip, according to the formula Determine the closing speed v of the hood locked initial position s ;

[0012] Where, m is the weight of the hood, W lock W is the negative work done by the hood lock during the hood lock locking process. buffer W is the negative work done by the buffer block during the hood lock process. stop W is the negative work done by the limit block during the hood lock process, hinge W is the negative work done by the hood hinge during the hood lock process. seal W is the negative work done by the sealing strip during the hood locking process. weight Work done for gravity.

[0013] In some optional solutions, when the hood closing accessories include a buffer block, a stop block, a hood hinge, a sealing strip and a gas strut, according to the formula Determine the closing speed v of the hood locked initial position s ;

[0014] Where, m is the weight of the hood, W lock W is the negative work done by the hood lock during the hood lock locking process. buffer W is the negative work done by the buffer block during the hood lock process. stop W is the negative work done by the limit block during the hood lock process, hinge W is the negative work done by the hood hinge during the hood lock process. seal W is the negative work done by the sealing strip during the hood locking process. gas is the negative work done by the gas strut, W weight Work done for gravity.

[0015] In some optional solutions, after determining the initial height of the free fall when the hood is closed, the following steps are also included:

[0016] Determine the initial static force required to close the hood from the highest supported position and the distance over which the initial static force is applied based on the hood weight, the rotation angle of the hood from the highest supported position to the initial height position, and the design parameters of the hood hinge and the gas struts;

[0017] determining whether the initial static force and the distance at which the initial static force is applied meet the design requirements, and if not, adjusting at least one of the design parameters of the hood hinge, the design parameters of the gas strut, and the weight of the hood until the initial static force and the distance at which the initial static force is applied meet the design requirements;

[0018] Determine again whether the initial height of free fall when the hood is closed is within the set range. If not, adjust at least one of the weight of the entire hood, the design parameters of the hood lock, and the design parameters of the hood closing accessories until the initial height is within the set range and the initial static force and the distance at which the initial static force is applied meet the design requirements.

[0019] In some optional solutions, the hood closing accessories include a buffer block, a limit block, a hood hinge, a sealing strip and a gas strut, and the determination of whether the initial free-fall height of the hood when it is closed is within a set range, and if not, adjusting the hood weight, the design parameters of the hood lock and the design parameters of the hood closing accessories until the initial height is within the set range includes:

[0020] Determine whether the initial free fall height when the hood is closed is within the set range;

[0021] When the initial free-fall height of the hood when it is closed is less than the minimum value of the set range, at least one of the negative work done by the hood lock, the buffer block, the limit block, the hood hinge, the sealing strip and the gas strut during the hood lock and lock process is increased, or the hood weight is reduced until the initial height is within the set range;

[0022] When the initial free fall height when the hood is closed is greater than the maximum value of the set range, at least one of the negative work done by the hood lock, buffer block, limit block, hood hinge, sealing strip and gas strut during the hood locking process is reduced, or the hood weight is increased until the initial height is within the set range.

[0023] In some optional solutions, when the initial free-fall height when the hood is closed is less than the minimum value of the set range, increasing at least one of the negative work done by the hood lock, the buffer block, the limit block, the hood hinge, the sealing strip and the gas strut during the hood lock locking process includes:

[0024] When the initial free-fall height when the hood is closed is less than the minimum value of the set range, and the difference is greater than the set value, the total negative work is increased according to a first set ratio of the total negative work done by the hood lock, the buffer block, the limit block, the hood hinge, the sealing strip and the gas strut during the hood lock and locking process, until the difference between the initial height and the minimum value of the set range is less than the set value;

[0025] The total negative work is increased according to a second set ratio of the total negative work done by the hood lock, buffer block, limit block, hood hinge, sealing strip and gas strut during the hood lock locking process, and the first set ratio is greater than the second set ratio, until the initial height is within the set range.

[0026] In some optional solutions, when the total negative work is increased according to a first set ratio of the total negative work done by the hood lock, the buffer block, the limit block, the hood hinge, the sealing strip and the gas strut during the hood lock locking process, and when the total negative work is increased according to a second set ratio of the total negative work done by the hood lock, the buffer block, the limit block, the hood hinge, the sealing strip and the gas strut during the hood lock locking process,

[0027] An adjustment ratio is set according to the sensitivity of the negative work done by the hood lock, buffer block, limit block, hood hinge, sealing strip and gas strut during the hood lock and locking process relative to the total negative work, and the negative work done by the hood lock, buffer block, limit block, hood hinge, sealing strip and gas strut during the hood lock and locking process is adjusted.

[0028] In some optional solutions, when the initial height of the free fall when the hood is closed is greater than the maximum value of the set range, reducing at least one of the negative work done by the hood lock, the buffer block, the limit block, the hood hinge, the sealing strip and the gas strut during the hood lock locking process includes:

[0029] When the initial free-fall height when the hood is closed is greater than the maximum value of the set range, and the difference is greater than the set value, the total negative work is reduced according to a first set proportion of the total negative work done by the buffer block, the stop block, the hood hinge, the sealing strip and the gas strut during the hood locking process, until the difference between the initial height and the minimum value of the set range is less than the set value;

[0030] The total negative work is reduced according to a second set ratio of the total negative work done by the hood lock, buffer block, limit block, hood hinge, sealing strip and gas strut during the hood lock and locking process, and the first set ratio is greater than the second set ratio, until the initial height is within the set range.

[0031] In some optional solutions, when the total negative work is reduced according to a first set ratio of the total negative work done by the hood lock, the buffer block, the limit block, the hood hinge, the sealing strip and the gas strut during the hood lock and locking process, and when the total negative work is reduced according to a second set ratio of the total negative work done by the hood lock, the buffer block, the limit block, the hood hinge, the sealing strip and the gas strut during the hood lock and locking process,

[0032] An adjustment ratio is set according to the sensitivity of the negative work done by the hood lock, buffer block, limit block, hood hinge and sealing strip during the hood lock and locking process relative to the total negative work, and the negative work done by the buffer block, limit block, hood hinge, sealing strip and gas strut during the hood lock and locking process is adjusted.

[0033] In some optional schemes, when adjusting the negative work done by the buffer block, limit block, hood hinge, sealing strip and gas strut during the hood locking process, if the design parameter corresponding to any one of the negative work done by the buffer block, limit block, hood hinge, sealing strip and gas strut during the hood locking process reaches its set threshold, the adjustment of its design parameter is stopped.

[0034] Compared with the prior art, the advantages of the present invention are: through the content of this application, by determining the closing speed of the hood locked in the initial position, then determining the initial height of the hood's free fall when closed and judging whether it meets the design requirements, until the initial height is within the set range. The closing comfort of the hood is optimized during the vehicle design and development stage to ensure the operating comfort of the hood and enhance customer operating perception. Avoid high change costs and cycle delays due to problems such as difficult hood closing and uncomfortable operation after the trial vehicle is produced. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0036] Figure 1 It is a schematic flow chart of a method for optimizing the closing comfort of an engine hood according to an embodiment of the present invention;

[0037] Figure 2 is a schematic diagram of a hood lock closed position in an embodiment of the present invention;

[0038] Figure 3 Schematic diagram of the hood lock closed initial position and the hood lock closed position in an embodiment of the present invention;

[0039] Figure 4Schematic diagram of the hood lock reaction force in an embodiment of the present invention. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0041] The embodiments of the present invention are further described in detail below with reference to the accompanying drawings.

[0042] like Figure 1 As shown, the present invention provides a method for optimizing the closing comfort of an engine hood, comprising the following steps:

[0043] S1: Determine the closing speed of the hood at the initial locking position based on the rotation angle of the hood from the initial locking position to the locked position, the weight of the hood, and the negative work done by the hood lock and the hood closing accessories.

[0044] In some optional embodiments, when the hood closing accessory includes a buffer block, a limit block, a hood hinge and a sealing strip, according to the formula Determine the closing speed v of the hood locked initial position s .

[0045] Where, m is the weight of the hood, W lock W is the negative work done by the hood lock during the hood lock locking process. buffer W is the negative work done by the buffer block during the hood lock process. stop W is the negative work done by the limit block during the hood lock process, hinge W is the negative work done by the hood hinge during the hood lock process. seal W is the negative work done by the sealing strip during the hood locking process. weight Work done for gravity.

[0046] In some optional embodiments, when the hood closing accessories include a buffer block, a stop block, a hood hinge, a sealing strip and a gas strut, according to the formula Determine the closing speed v of the hood locked initial position s .

[0047] Where, m is the weight of the hood, W lock W is the negative work done by the hood lock during the hood lock locking process. buffer W is the negative work done by the buffer block during the hood lock process.stop W is the negative work done by the limit block during the hood lock process, hinge W is the negative work done by the hood hinge during the hood lock process. seal W is the negative work done by the sealing strip during the hood locking process. gas Work done for gravity.

[0048] Specifically, Figure 2 This is a schematic diagram of the hood lock closed position. Figure 3 Illustrations of the hood lock closed initial position and closed position.

[0049] The hood lock locking energy is the work done by the hood lock from the initial position to the closed position. The calculation formula is as follows:

[0050]

[0051] Among them, F lock is the hood lock force, S5 is the hood lock working distance, F lock =(F1*L1) / L0, such as Figure 3 and 4 As shown, the main spring tension force F1 = K lock *Ls, L1 are the tension spring force arms, and the hood locking force arm is L0, K lock is the main spring stiffness and Ls is the spring elongation.

[0052] The compression energy of the buffer block is calculated as follows:

[0053]

[0054] Among them, S1 is the compression of the hood buffer block, and the hood buffer block force F buffer .

[0055] The compression energy of the limit block is calculated as follows:

[0056]

[0057] Among them, F stop is the force acting on the hood limit block, and S2 is the compression of the hood limit block.

[0058] The energy consumed by the hood hinge friction is calculated as follows:

[0059]

[0060] Among them, M hinge is the instantaneous friction torque of the hood hinge when closing, and θ is the rotation angle of the hinge during the hood closing process.

[0061] The compression energy of the sealing strip is calculated as follows:

[0062]

[0063] Among them, F seal is the force of the hood sealing strip, and S3 is the compression of the hood limit block.

[0064] The compression energy of the gas strut is calculated as follows:

[0065]

[0066] Among them, F gas is the force of the hood gas strut, and S4 is the compression of the hood gas strut.

[0067] The work done by the hood gravity is calculated as follows:

[0068] W weight =mg*S5

[0069] Wherein, m is the total weight of the moving parts of the engine hood system, and S5 is the distance worked by the gravity of the hood.

[0070] S2: Determine the initial free fall height of the hood when it is closed based on the closing speed of the hood locked initial position.

[0071] In this implementation, according to Determine the initial free fall height when the hood is closed, where h is the initial free fall height when the hood is closed, g is the acceleration due to gravity, m is the total weight of the active parts of the hood system, and W is hinge(h) It is the energy consumed by hinge friction during the process from the initial height of free fall when the hood is closed to the initial position of the hood lock. W hinge(h) The solution is the same as the one for the energy consumed by hinge friction during the hood locking process.

[0072] S3: Determine whether the initial free-fall height when the hood is closed is within a set range. If not, adjust the hood weight, design parameters of the hood lock and / or design parameters of the hood closing accessories until the initial height is within the set range.

[0073] In some optional embodiments, the hood closing accessories include a buffer block, a limit block, a hood hinge, a sealing strip and a gas strut, and the method of judging whether the initial free-fall height of the hood when it is closed is within a set range, and if not, adjusting the hood weight, the design parameters of the hood lock and the design parameters of the hood closing accessories until the initial height is within the set range includes:

[0074] Determine whether the initial free fall height when the hood is closed is within the set range;

[0075] When the initial free-fall height of the hood when it is closed is less than the minimum value of the set range, at least one of the negative work done by the hood lock, the buffer block, the limit block, the hood hinge, the sealing strip and the gas strut during the hood lock and lock process is increased, or the hood weight is reduced until the initial height is within the set range;

[0076] When the initial free fall height when the hood is closed is greater than the maximum value of the set range, at least one of the negative work done by the hood lock, buffer block, limit block, hood hinge, sealing strip and gas strut during the hood locking process is reduced, or the hood weight is increased until the initial height is within the set range.

[0077] In some optional embodiments, when the initial free-fall height when the hood is closed is less than the minimum value of the set range, increasing at least one of the negative work done by the hood lock, the buffer block, the limit block, the hood hinge, the sealing strip and the gas strut during the hood lock locking process includes:

[0078] When the initial free-fall height when the hood is closed is less than the minimum value of the set range, and the difference is greater than the set value, the total negative work is increased according to a first set ratio of the total negative work done by the hood lock, the buffer block, the limit block, the hood hinge, the sealing strip and the gas strut during the hood lock and locking process, until the difference between the initial height and the minimum value of the set range is less than the set value;

[0079] The total negative work is increased according to a second set ratio of the total negative work done by the hood lock, buffer block, limit block, hood hinge, sealing strip and gas strut during the hood lock locking process, and the first set ratio is greater than the second set ratio, until the initial height is within the set range.

[0080] In some optional embodiments, when the total negative work is increased according to a first set ratio of the total negative work done by the hood lock, the buffer block, the limit block, the hood hinge, the sealing strip and the gas strut during the hood lock locking process, and when the total negative work is increased according to a second set ratio of the total negative work done by the hood lock, the buffer block, the limit block, the hood hinge, the sealing strip and the gas strut during the hood lock locking process,

[0081] An adjustment ratio is set according to the sensitivity of the negative work done by the hood lock, buffer block, limit block, hood hinge, sealing strip and gas strut during the hood lock and locking process relative to the total negative work, and the negative work done by the hood lock, buffer block, limit block, hood hinge, sealing strip and gas strut during the hood lock and locking process is adjusted.

[0082] In some optional embodiments, when the initial free-fall height when the hood is closed is greater than the maximum value of the set range, reducing at least one of the negative work done by the hood lock, the buffer block, the limit block, the hood hinge, the sealing strip and the gas strut during the hood lock locking process includes:

[0083] When the initial free-fall height when the hood is closed is greater than the maximum value of the set range, and the difference is greater than the set value, the total negative work is reduced according to a first set proportion of the total negative work done by the buffer block, the stop block, the hood hinge, the sealing strip and the gas strut during the hood locking process, until the difference between the initial height and the minimum value of the set range is less than the set value;

[0084] The total negative work is reduced according to a second set ratio of the total negative work done by the hood lock, buffer block, limit block, hood hinge, sealing strip and gas strut during the hood lock and locking process, and the first set ratio is greater than the second set ratio, until the initial height is within the set range.

[0085] In some optional embodiments, when the total negative work is reduced according to a first set ratio of the total negative work done by the hood lock, the buffer block, the limit block, the hood hinge, the sealing strip and the gas strut during the hood lock and locking process, and when the total negative work is reduced according to a second set ratio of the total negative work done by the hood lock, the buffer block, the limit block, the hood hinge, the sealing strip and the gas strut during the hood lock and locking process,

[0086] An adjustment ratio is set according to the sensitivity of the negative work done by the hood lock, buffer block, limit block, hood hinge and sealing strip during the hood lock and locking process relative to the total negative work, and the negative work done by the buffer block, limit block, hood hinge, sealing strip and gas strut during the hood lock and locking process is adjusted.

[0087] In this embodiment, the setting range is 15-20 cm from the hood closing position, which is determined specifically according to different vehicle models. The setting value is 10 cm, the first setting ratio is 10%, and the second setting ratio is 5%. The specific setting ratio can be adjusted according to different vehicle models, so that the initial height of the free fall when the hood is closed can be quickly adjusted to within the setting range, thereby improving the adjustment efficiency. When adjusting, the initial height of the free fall when the hood is closed should be within the smaller value range of the setting range as much as possible. The negative work done by the hood lock, buffer block, limit block, hood hinge, sealing strip and gas strut will become smaller after long-term use, and the required initial height will become lower.

[0088] In this embodiment, the negative work done by each of the hood lock, buffer block, limit block, hood hinge, sealing strip and gas strut is different in the total negative work done, so when adjusting, the proportion can be set according to the sensitivity of the negative work done by various accessories in the total negative work to improve the efficiency of adjustment. The sensitivity of the negative work done by various accessories in the total negative work is shown in the following table:

[0089] The sensitivity of the negative work done by various accessories to the total negative work

[0090] Serial number Optimizing parts Sensitivity analysis Reaction force optimization decomposition coefficient 1 Hood lock High sensitivity 0.4 2 Hood buffer block Medium sensitivity 0.2 3 Hood stopper Ignore 0 4 Hood hinge Ignore 0 5 Hood seal strip Low sensitivity 0.1 6 Hood gas strut High sensitivity 0.3

[0091] In some optional embodiments, when adjusting the negative work done by the buffer block, limit block, hood hinge, sealing strip and gas strut during the hood locking process, if the design parameter corresponding to any one of the negative work done by the buffer block, limit block, hood hinge, sealing strip and gas strut during the hood locking process reaches its set threshold, the adjustment of its design parameter is stopped.

[0092] Specifically, the lower limit threshold of the hood lock reaction force Flock is:

[0093] Flock>Load on the lock engagement point when the hood lock is in the initial closed position, otherwise the hood cannot be fully lifted after it is unlocked.

[0094] Lower limit threshold of hood gas strut force Fgas:

[0095] The force Fgas when the gas strut is extended to the longest is greater than 150N. If it is less than 150N, the manufacturing tolerance of the gas strut will have a greater impact on the consistency and affect the operational perception.

[0096] Hood buffer force Fbuffer lower limit threshold:

[0097] When the hood is closed, the combined force of all buffer blocks Fbuffer-assy>200N, otherwise the vehicle may vibrate or make abnormal noises while driving.

[0098] Hood seal force Fseal lower threshold:

[0099] Stop optimizing when the hood sealing strip is optimized to 1.5N / 100mm, otherwise the sealing strip will lose its sealing function.

[0100] In some optional embodiments, after determining the initial height of the free fall when the hood is closed, the following steps are further included:

[0101] A: Based on the hood weight, the hood rotation angle from the highest support position to the initial height position, and the design parameters of the hood hinges and gas struts, determine the initial static force required to close the hood from the highest support position and the distance over which the initial static force is applied.

[0102] In this embodiment, when the hood is closed from the highest supported position, the reaction force of the gas struts needs to be overcome, and the gravity component of the hood can be superimposed.

[0103] At this time, the reaction force of the gas strut is F gas =F0+K gas ×S7, S7 is the compression amount of the hood gas strut during the compression process, and F0 is the reaction force of the hood gas strut at the highest support position.

[0104] B: Determine whether the initial static force and the distance at which the initial static force is applied meet the design requirements. If not, adjust at least one of the design parameters of the hood hinge, the design parameters of the gas strut and the weight of the hood until the initial static force and the distance at which the initial static force is applied meet the design requirements.

[0105] C: Determine again whether the initial free fall height when the hood is closed is within the set range. If not, adjust at least one of the weight of the entire hood, the design parameters of the hood lock, and the design parameters of the hood closing accessories until the initial height is within the set range and the initial static force and the distance at which the initial static force is applied meet the design requirements.

[0106] Through the above adjustments, the hood weight, the design parameters of the hood lock and the hood closing accessories can meet the design requirements, and the initial height can be within the set range, and the initial static force and the distance of applying the initial static force can meet the design requirements. While meeting the comfort when closing the hood (NVH), the comfort when closing the hood mainly refers to the noise when closing, and at the same time, the operator who closes the hood has a better operating experience. The initial static force and the distance of applying the initial static force are the most comfortable values ​​obtained through long-term tests and ergonomics.

[0107] In addition, based on the same inventive concept, the present invention also provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, all the method steps of the engine hood closing comfort optimization method as described above are implemented.

[0108] In other embodiments of the present application, the closing comfort design evaluation and optimization of other opening and closing parts of the vehicle, such as the door cover system, can also be optimized with reference to the engine hood closing comfort optimization method provided in the present application to ensure the human-machine operability of the final product.

[0109] The present invention implements all or part of the process in the above method, and can also be completed by instructing related hardware through a computer program. The computer program can be stored in a computer-readable storage medium. When the computer program is executed by a processor, the steps of each method embodiment can be implemented. Among them, the computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form. The computer-readable medium may include: any entity or device capable of carrying computer program code, recording medium, USB flash drive, mobile hard disk, disk, optical disk, computer memory, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), electric carrier signal, telecommunication signal and software distribution medium. It should be noted that the content contained in the computer-readable medium can be appropriately increased or decreased according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, the computer-readable medium does not include electric carrier signals and telecommunication signals.

[0110] Based on the same inventive concept, an embodiment of the present application also provides an electronic device, including a memory and a processor, wherein the memory stores a computer program running on the processor, and when the processor executes the computer program, all or part of the method steps in the above method are implemented.

[0111] The processor may be a central processing unit (CPU), other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor, etc. The processor is the control center of a computer device, and uses various interfaces and lines to connect various parts of the entire computer device.

[0112] The memory can be used to store computer programs and / or modules. The processor realizes various functions of the computer device by running or executing the computer programs and / or modules stored in the memory, and calling the data stored in the memory. The memory can mainly include a program storage area and a data storage area, wherein the program storage area can store an operating system and at least one application required for a function (such as a sound playback function, an image playback function, etc.); the data storage area can store data created according to the use of the mobile phone (such as audio data, video data, etc.). In addition, the memory can include a high-speed random access memory, and can also include a non-volatile memory, such as a hard disk, a memory, a plug-in hard disk, a smart memory card (SmartMedia Card, SMC), a secure digital (Secure Digital, SD) card, a flash card (Flash Card), at least one disk storage device, a flash memory device, or other volatile solid-state storage devices.

[0113] It will be appreciated by those skilled in the art that embodiments of the present invention may be provided as methods, systems, servers or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage and optical storage, etc.) containing computer-usable program codes.

[0114] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), servers, and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as a combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0115] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0116] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0117] It should be noted that, in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0118] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A method for optimizing the closing comfort of an engine hood, characterized in that: The following steps are involved: Determine the closing speed of the hood at the initial locking position based on the rotation angle of the hood from the initial locking position to the locked position, the weight of the hood, and the negative work done by the hood lock and the hood closing accessories; According to the closing speed of the hood in the initial locked position, determine the initial free fall height of the hood when it is closed; Determine whether the initial free-fall height when the hood is closed is within a set range. If not, adjust the hood weight, the design parameters of the hood lock and / or the design parameters of the hood closing accessories until the initial height is within the set range.

2. The engine hood closing comfort optimization method according to claim 1, characterized in that: When the hood closing accessories include a buffer block, a stop block, a hood hinge and a sealing strip, according to the formula Determine the closing speed v of the hood locked initial position s ; Where, m is the weight of the hood, W lock W is the negative work done by the hood lock during the hood lock locking process. buffer W is the negative work done by the buffer block during the hood lock process. stop W is the negative work done by the limit block during the hood lock process, hinge W is the negative work done by the hood hinge during the hood lock process. seal W is the negative work done by the sealing strip during the hood locking process. weight Work done for gravity.

3. The engine hood closing comfort optimization method according to claim 1, characterized in that: When the hood closing accessories include a buffer block, a stop block, a hood hinge, a sealing strip and a gas strut, according to the formula Determine the closing speed v of the hood locked initial position s ; Where, m is the weight of the hood, W lock W is the negative work done by the hood lock during the hood lock locking process. buffer W is the negative work done by the buffer block during the hood lock process. stop W is the negative work done by the limit block during the hood lock process, hinge W is the negative work done by the hood hinge during the hood lock process. seal W is the negative work done by the sealing strip during the hood locking process. gas is the negative work done by the gas strut, W weight Work done for gravity.

4. The engine hood closing comfort optimization method according to claim 3, characterized in that: After determining the initial free fall height when the hood is closed, the following steps are included: Determine the initial static force required to close the hood from the highest supported position and the distance over which the initial static force is applied based on the hood weight, the rotation angle of the hood from the highest supported position to the initial height position, and the design parameters of the hood hinge and the gas struts; determining whether the initial static force and the distance at which the initial static force is applied meet the design requirements, and if not, adjusting at least one of the design parameters of the hood hinge, the design parameters of the gas strut, and the weight of the hood until the initial static force and the distance at which the initial static force is applied meet the design requirements; Determine again whether the initial height of free fall when the hood is closed is within the set range. If not, adjust at least one of the weight of the entire hood, the design parameters of the hood lock, and the design parameters of the hood closing accessories until the initial height is within the set range and the initial static force and the distance at which the initial static force is applied meet the design requirements.

5. The engine hood closing comfort optimization method according to claim 1, characterized in that: The hood closing accessories include a buffer block, a limit block, a hood hinge, a sealing strip and a gas strut. The method of judging whether the initial free-falling height of the hood when it is closed is within a set range, and if not, adjusting the hood weight, the design parameters of the hood lock and the design parameters of the hood closing accessories until the initial height is within the set range includes: Determine whether the initial free fall height when the hood is closed is within the set range; When the initial free-fall height of the hood when it is closed is less than the minimum value of the set range, at least one of the negative work done by the hood lock, the buffer block, the limit block, the hood hinge, the sealing strip and the gas strut during the hood lock and lock process is increased, or the hood weight is reduced until the initial height is within the set range; When the initial free fall height when the hood is closed is greater than the maximum value of the set range, at least one of the negative work done by the hood lock, buffer block, limit block, hood hinge, sealing strip and gas strut during the hood locking process is reduced, or the hood weight is increased until the initial height is within the set range.

6. The engine hood closing comfort optimization method according to claim 5, characterized in that: When the initial free-fall height of the hood when closed is less than the minimum value of the set range, at least one of the negative work done by the hood lock, the buffer block, the limit block, the hood hinge, the sealing strip and the gas strut during the hood lock locking process is increased, including: When the initial free-fall height when the hood is closed is less than the minimum value of the set range, and the difference is greater than the set value, the total negative work is increased according to a first set ratio of the total negative work done by the hood lock, the buffer block, the limit block, the hood hinge, the sealing strip and the gas strut during the hood lock and locking process, until the difference between the initial height and the minimum value of the set range is less than the set value; The total negative work is increased according to a second set ratio of the total negative work done by the hood lock, buffer block, limit block, hood hinge, sealing strip and gas strut during the hood lock locking process, and the first set ratio is greater than the second set ratio, until the initial height is within the set range.

7. The engine hood closing comfort optimization method according to claim 6, characterized in that: When the total negative work is increased according to a first set ratio of the total negative work done by the hood lock, the buffer block, the limit block, the hood hinge, the sealing strip and the gas strut during the hood lock and locking process, and when the total negative work is increased according to a second set ratio of the total negative work done by the hood lock, the buffer block, the limit block, the hood hinge, the sealing strip and the gas strut during the hood lock and locking process, An adjustment ratio is set according to the sensitivity of the negative work done by the hood lock, buffer block, limit block, hood hinge, sealing strip and gas strut during the hood lock and locking process relative to the total negative work, and the negative work done by the hood lock, buffer block, limit block, hood hinge, sealing strip and gas strut during the hood lock and locking process is adjusted.

8. The engine hood closing comfort optimization method according to claim 5, characterized in that: When the initial free-fall height of the hood when closed is greater than the maximum value of the set range, reducing at least one of the negative work done by the hood lock, the buffer block, the limit block, the hood hinge, the sealing strip and the gas strut during the hood lock locking process, comprises: When the initial free-fall height when the hood is closed is greater than the maximum value of the set range, and the difference is greater than the set value, the total negative work is reduced according to a first set proportion of the total negative work done by the buffer block, the stop block, the hood hinge, the sealing strip and the gas strut during the hood locking process, until the difference between the initial height and the minimum value of the set range is less than the set value; The total negative work is reduced according to a second set ratio of the total negative work done by the hood lock, buffer block, limit block, hood hinge, sealing strip and gas strut during the hood lock and locking process, and the first set ratio is greater than the second set ratio, until the initial height is within the set range.

9. The engine hood closing comfort optimization method according to claim 8, characterized in that: When the total negative work is reduced according to a first set ratio of the total negative work done by the hood lock, the buffer block, the stop block, the hood hinge, the sealing strip and the gas strut during the hood lock and locking process, and when the total negative work is reduced according to a second set ratio of the total negative work done by the hood lock, the buffer block, the stop block, the hood hinge, the sealing strip and the gas strut during the hood lock and locking process, An adjustment ratio is set according to the sensitivity of the negative work done by the hood lock, buffer block, limit block, hood hinge and sealing strip during the hood lock and locking process relative to the total negative work, and the negative work done by the buffer block, limit block, hood hinge, sealing strip and gas strut during the hood lock and locking process is adjusted.

10. The engine hood closing comfort optimization method according to claim 7 or 9, characterized in that: When adjusting the negative work done by the buffer block, limit block, hood hinge, sealing strip and gas strut during the hood locking process, if the design parameter corresponding to any one of the negative work done by the buffer block, limit block, hood hinge, sealing strip and gas strut during the hood locking process reaches its set threshold, stop adjusting the design parameter.

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