CN117367829A - Method for testing influence of assembly carrying angle on drivability of whole vehicle - Google Patents
Method for testing influence of assembly carrying angle on drivability of whole vehicle Download PDFInfo
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- CN117367829A CN117367829A CN202311374781.6A CN202311374781A CN117367829A CN 117367829 A CN117367829 A CN 117367829A CN 202311374781 A CN202311374781 A CN 202311374781A CN 117367829 A CN117367829 A CN 117367829A
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- 238000000034 method Methods 0.000 title claims abstract description 20
- 239000000725 suspension Substances 0.000 claims abstract description 13
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- 238000012545 processing Methods 0.000 claims description 3
- 238000012216 screening Methods 0.000 claims description 3
- 238000011161 development Methods 0.000 abstract description 6
- 230000007547 defect Effects 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
- G01M17/007—Wheeled or endless-tracked vehicles
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Abstract
A method for testing influence of an assembly carrying angle on the drivability of a whole vehicle belongs to the technical field of vehicle performance testing. The method comprises the following steps: manufacturing a plurality of different left and right suspension and rear suspension driving ends according to the assembly carrying angle range; the carrying angle range of the assembly is 15 degrees of forward tilting to 15 degrees of backward tilting; manufacturing half shafts with the length being adapted according to the carrying angle range of the assembly, performing grouping assembly, and then recording the included angles of horizontal and vertical planes of the half shafts on two sides corresponding to the carrying angle; carrying out drivability test on the whole vehicle with different assembly carrying angles by using special drivability evaluation software; after all the carrying angle tests are completed, the test data are processed, the test working condition results are scored through drivability evaluation software, and carrying schemes with optimal drivability are screened out. The invention can confirm the suspension form in the development stage of the vehicle model, and the important conditions such as the level of the half axle, the included angle in the front-rear direction and the like, and lays a foundation for excellent driving feeling after the assembly is carried.
Description
Technical Field
The invention belongs to the technical field of vehicle performance testing, and particularly relates to a method for testing influence of an assembly carrying angle on the drivability of a whole vehicle.
Background
As the automobile market becomes more competitive, the development cycle of new models is compressed again and again, changing from more than 4 years to 1-2 years now. And consumers are also continually increasing in terms of drivability, comfort, etc. of the vehicle. This requires the early stage of vehicle type development, and when important conditions such as the mounting angle of the assembly and the driving direction of the power line are determined, the important conditions are considered, so that the influence on the driving performance and comfort of the vehicle can be realized only in the later stage of the project. Otherwise, the vehicle is found to have defects in driving feeling at the later stage of the project, and the defects are caused by problems of assembly carrying angle or power line arrangement, and the adjustment on the overall arrangement at the moment wastes a great deal of resources and occupies precious research and development time. Therefore, it is necessary to make the two show the correlation as soon as possible and make the optimal selection in the early stage of the project, and therefore, a test method for rapidly and effectively verifying the influence of the mounting angle of the assembly on the drivability of the whole vehicle in the early stage of the front-mounted front-drive development is urgently needed.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provides a method for testing the influence of an assembly carrying angle on the drivability of a whole vehicle.
The testing method can confirm important conditions such as suspension form, half shaft level, front-rear direction included angle and the like in the vehicle model development stage, and lays a foundation for excellent driving feeling after the assembly is carried. In order to achieve the above purpose, the invention adopts the following technical scheme:
a method for testing influence of an assembly carrying angle on the drivability of a whole vehicle comprises the following steps:
step one, manufacturing a plurality of sets (preferably five sets) of driving ends of different left and right suspensions and rear suspensions according to the assembly carrying angle range; the carrying angle range of the assembly is 15 degrees of forward tilting to 15 degrees of backward tilting;
step two, manufacturing half shafts with the lengths being adapted according to the carrying angle range of the assembly, performing grouping assembly, and then recording the included angles of horizontal and vertical planes of the half shafts on two sides corresponding to the carrying angle;
thirdly, performing drivability test on the whole vehicle with different assembly carrying angles by using special drivability evaluation software;
and fourthly, after all the carrying angle tests are completed, processing the test data, scoring the test working condition results through drivability evaluation software (counting and transversely comparing according to the scheme code number, carrying angle, grading of each working condition and total grading), and screening out the carrying scheme with optimal drivability.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention can be used for confirming important conditions such as suspension form, half shaft level, front-rear direction included angle and the like in the vehicle model development stage, and lays a foundation for excellent driving feeling after the assembly is carried.
Detailed Description
The first embodiment is as follows: the embodiment discloses a method for testing the influence of an assembly carrying angle on the drivability of a whole vehicle, which comprises the following steps:
step one, manufacturing a plurality of sets (preferably five sets) of driving ends of different left and right suspensions and rear suspensions according to the assembly carrying angle range; the carrying angle range of the assembly is 15 degrees of forward tilting to 15 degrees of backward tilting;
step two, manufacturing half shafts with the lengths being adapted according to the carrying angle range of the assembly, performing grouping assembly, and then recording the included angles of horizontal and vertical planes of the half shafts on two sides corresponding to the carrying angle;
thirdly, performing drivability test on the whole vehicle with different assembly carrying angles by using special drivability evaluation software;
and fourthly, after all the carrying angle tests are completed, processing the test data, scoring the test working condition results through drivability evaluation software (counting and transversely comparing according to the scheme code number, carrying angle, grading of each working condition and total grading), and screening out the carrying scheme with optimal drivability.
The second embodiment is as follows: this embodiment is further described with respect to the first embodiment, and in the third step, the drivability test includes an Engine start test, a Power on upshift test, a Tip in down shift test, and a Hill start test.
And a third specific embodiment: the present embodiment is further described with respect to the second embodiment, wherein the Engine start test in the third step is an Engine start test in the on/off states of the cold car, the hot car and the air conditioner.
The specific embodiment IV is as follows: this embodiment is further described with respect to the second embodiment, where the Power on upshift test described in the third step is a fixed throttle sequential upshift test starting from a 0 vehicle speed state.
Fifth embodiment: the present embodiment is further described with respect to the second embodiment, in which the Tip in down shift test is a downshift test in which the accelerator pedal opening is increased by different amounts in different vehicle speeds and initial gear states.
Specific embodiment six: this embodiment is further described with respect to the second embodiment, and the Hill start test is a D-range and R-range start test under different gradients in the 0-vehicle speed state.
The invention is suitable for front-mounted front-drive vehicles, needs to be carried on a power assembly mule vehicle, has driving performance evaluation conditions, and then makes five sets of different left-right suspension and rear suspension driving ends according to the carrying angle range of the assembly (15 degrees forward-15 degrees backward-15 degrees), simultaneously makes half shafts with the length being adapted according to the carrying angle range for assembly, and records the included angles of horizontal and vertical planes of the half shafts at two sides corresponding to the carrying angle. After the assembly is completed, the drivability of the whole vehicle with different assembly carrying angles is tested, and the test comprises working conditions such as Engine start (fixed throttle sequential upshift, 10% step size), tip in Down shift (different gear refueling downshift), hill start (starting under different gradients) and the like, wherein the working conditions should cover more than 95% of the driving working conditions of the whole vehicle. After all the carrying angles are tested, the test data are processed, the test working condition results are scored through drivability evaluation software (AVL-Drive objective drivability evaluation system), the test results are transversely compared, and finally the carrying angle with optimal drivability is screened.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.
Claims (6)
1. A method for testing the influence of an assembly carrying angle on the drivability of a whole vehicle is characterized by comprising the following steps of: the method comprises the following steps:
step one, manufacturing a plurality of sets (preferably five sets) of driving ends of different left and right suspensions and rear suspensions according to the assembly carrying angle range; the carrying angle range of the assembly is 15 degrees of forward tilting to 15 degrees of backward tilting;
step two, manufacturing half shafts with the lengths being adapted according to the carrying angle range of the assembly, performing grouping assembly, and then recording the included angles of horizontal and vertical planes of the half shafts on two sides corresponding to the carrying angle;
thirdly, performing drivability test on the whole vehicle with different assembly carrying angles by using special drivability evaluation software;
and fourthly, after all the carrying angle tests are completed, processing the test data, scoring the test working condition results through drivability evaluation software (counting and transversely comparing according to the scheme code number, carrying angle, grading of each working condition and total grading), and screening out the carrying scheme with optimal drivability.
2. The method for testing the influence of the assembly carrying angle on the drivability of the whole vehicle according to claim 1, wherein the method comprises the following steps: in the third step, the drivability test includes an Engine start test, a Power on upshift test, a Tip in Down shift test, and a Hill start test.
3. The method for testing the influence of the assembly carrying angle on the drivability of the whole vehicle according to claim 2, wherein the method comprises the following steps: the Engine start test is an Engine start test in the on/off state of a cold car, a hot car and an air conditioner.
4. The method for testing the influence of the assembly carrying angle on the drivability of the whole vehicle according to claim 2, wherein the method comprises the following steps: the Power on upshift test is a fixed throttle sequential upshift test starting at 0 vehicle speed.
5. The method for testing the influence of the assembly carrying angle on the drivability of the whole vehicle according to claim 2, wherein the method comprises the following steps: the Tip in down shift test is a downshift test for increasing the opening of the accelerator pedal in different magnitudes under different vehicle speeds and initial gear states.
6. The method for testing the influence of the assembly carrying angle on the drivability of the whole vehicle according to claim 2, wherein the method comprises the following steps: and D gear and R gear starting tests under different gradients under the condition that the Hill start test is in a 0-vehicle speed state.
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| CN202311374781.6A CN117367829A (en) | 2023-10-23 | 2023-10-23 | Method for testing influence of assembly carrying angle on drivability of whole vehicle |
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| CN202311374781.6A CN117367829A (en) | 2023-10-23 | 2023-10-23 | Method for testing influence of assembly carrying angle on drivability of whole vehicle |
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