CN112849281A - Engine based on mechanical suspension cab and cab rapid positioning method - Google Patents
Engine based on mechanical suspension cab and cab rapid positioning method Download PDFInfo
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- CN112849281A CN112849281A CN202110305232.8A CN202110305232A CN112849281A CN 112849281 A CN112849281 A CN 112849281A CN 202110305232 A CN202110305232 A CN 202110305232A CN 112849281 A CN112849281 A CN 112849281A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D33/00—Superstructures for load-carrying vehicles
- B62D33/06—Drivers' cabs
- B62D33/0604—Cabs insulated against vibrations or noise, e.g. with elastic suspension
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K5/00—Arrangement or mounting of internal-combustion or jet-propulsion units
Abstract
The invention provides an engine based on a mechanical suspension cab and a cab quick positioning method0,H1,H2,H3) And the final positioning of the engine and the final positioning of the mechanical suspension cab are quickly determined, so that the quick definition of the size hard spot in the forward research and development process of the whole vehicle is realized. Introduction of the objective function f (H) of the invention0,H1,H2,H3) Quantifying the positioning process of the engine and the mechanical suspension cab in the form of an objective function; the method has the advantages that the target is clear, the positioning cycle process is simple and clear, the problem that the floor of the mechanical suspension cab is easy to interfere with an engine in the development process of the vehicle type of the mechanical suspension cab is solved by introducing beta, gamma and alpha control coefficients, and the method is greatly proposedThe workload of positioning the engine and the mechanical suspension cab in the development process of a new vehicle model by enterprise research personnel is greatly simplified.
Description
Technical Field
The invention relates to an engine and a cab positioning method, in particular to a mechanical suspension cab-based engine and a cab quick positioning method.
Background
In recent years, the rapid development of the transportation industry has prompted the development of light, medium and heavy commercial vehicles to be rapid, so that the market change demand can be responded rapidly, and the creation of new vehicle types meeting the customer demand is always a hot point of concern for various commercial vehicle enterprises in the industry. The positioning of an engine and a mechanical suspension cab is taken as a key step of a size hard point definition process in the forward research and development process of the whole automobile and always plays a significant role; in the development process of a new vehicle model with a mechanical suspension cab, the condition that the floor of the mechanical suspension cab is interfered with an engine is easy to occur because the reserved amount between the floor of the mechanical suspension cab and the engine body is difficult to accurately control; it is always difficult for enterprise researchers to master the positioning of the engine and the mechanical suspension cab in the hard spot definition process of the size of a new vehicle type. Therefore, it is an urgent need to provide a method for quickly positioning an engine and a mechanically suspended cab, which can solve the above problems.
Disclosure of Invention
The invention aims to provide an engine based on a mechanical suspension cab and a cab quick positioning method, so that the positioning work is simple and clear and can be quantized.
In order to achieve the purpose, the invention is realized by the following technical scheme:
an engine based on mechanical suspended driver's cab and its quick locating method are disclosed, which are characterized by that the initial locations of engine (E10, E20, E30) and mechanical suspended driver's cab (C10, C20) are input, and the distance between the front floor of mechanical suspended driver's cab and its front floor is measuredGround height objective function f (H)0,H1,H2,H3)＝β[H0+γH1+(HE1+HE2)+αH3]-CbThe method comprises the following steps of quickly determining the final positioning (E1, E2, E3) of an engine and the final positioning (C1, C2) of a mechanical suspension cab:
step 1, inputting initial positioning: the method comprises the steps of initial positioning of an engine (E10, E20, E30) and initial positioning of a mechanical suspension cab (C10, C20);
step 2, judging the height H of the engine from the groundEHeight difference H between front axle I-beam and engine oil pan1Whether or not to satisfy HEAnd H1The corresponding control requirements are as follows: outputting the height H of the engine from the ground after inputting the initial positioning (E10, E20, E30) of the engineEStep 2 is carried out to judge HEWhether or not to satisfy HEControl requirement when HESatisfy HEOutputting the height difference H between the I-beam of the front axle and the oil pan of the engine according to the control requirement1And to H1Making a judgment as to whether H is satisfied1Control requirement when H1Satisfy H1Control request is then output H1(ii) a Otherwise, when HEAnd H1Do not satisfy corresponding HEAnd H1Returns to step 1 to readjust the input engine initial position (E10, E20, E30);
step 3, judging the height difference H between the engine and the mechanical suspension cab floor3Whether or not to satisfy H3The control requirements are as follows: when the input mechanical suspension cab is initially positioned (C10, C20), the height difference H between the output engine and the mechanical suspension cab floor is output3Proceed step 3 to judge H3Whether or not to satisfy H3Control requirement when H3Satisfy H3Control request is then output H3(ii) a Otherwise, when H3Does not satisfy H3When the control requires, returning to the step 1 to readjust the initial positioning of the input mechanical suspension cab (C10, C20);
step 4, judging the ground clearance H of the floor before the mechanical suspension cabCWhether or not to satisfy HCThe control requirements are as follows: when the steps 1, 2 and 3 are finished, the front floor of the cab is separated according to the mechanical suspensionGround height objective function f (H)0,H1,H2,H3)＝β[H0+γH1+(HE1+HE2)+αH3]-CbFind HCStep 4 is carried out to judge HCWhether or not to satisfy HCControl requirement when HCSatisfy HCIf the control requirement is met, performing step 5; otherwise, when HCDoes not satisfy HCWhen the control requires, the control returns to the step 1 to readjust the initial positioning of the engine (E10, E20, E30), the initial positioning of the mechanical suspension cab (C10, C20) and the height H of the oil pan of the engineE1In the formula: h0The difference value between the static load radius of the tire and the front axle drop is obtained; hE1Is the engine sump height; hE2Is the engine block height; cbThe height difference of the front floor and the rear floor of the mechanical suspension cab is obtained; beta is the ground clearance control coefficient of the floor before the mechanical suspension cab; gamma is a height difference control coefficient of the front axle I-beam and the engine oil pan; alpha is the height difference control coefficient of the rear floor of the engine and the mechanical suspension cab;
step 5, outputting final positioning: including final engine positioning (E1, E2, E3) and final mechanical suspension cab positioning (C1, C2).
Preferably, in the step 4, a ground clearance control coefficient β of a front floor of the mechanically suspended cab is a set fixed value, and a value range of β is 0.97 to 1.01; the height difference control coefficient gamma of the front axle I-beam and the engine oil pan is a set fixed value, and the value range of gamma is 0.93-1.16; the height difference control coefficient alpha of the rear floor of the engine and the mechanical suspension cab is a set fixed value, and the value range of alpha is 0.98-1.05.
Preferably, the height H of the engine from the ground isEThe control requirement is more than or equal to 290 mm; height difference H between I-shaped beam of front axle and engine oil pan1The control requirement is more than or equal to 35 mm; height difference H between engine and mechanical suspension cab floor3The control requirement is more than or equal to 45 mm; mechanical suspension driver's cabin floor ground clearance HCThe control requirement is equal to or less than 832 mm.
The invention has the advantages that: introduction object of the inventionScalar function f (H)0,H1,H2,H3) Quantifying the positioning process of the engine and the mechanical suspension cab in the form of an objective function; the method has the advantages that the target is clear, the positioning cycle process is simple and clear, the problem that the floor of the mechanical suspension cab is easily interfered with an engine in the development process of the vehicle type of the mechanical suspension cab is solved due to the introduction of beta, gamma and alpha control coefficients, and the workload of positioning the engine and the mechanical suspension cab in the development process of new vehicle types of enterprise research and development personnel is greatly reduced.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention.
FIG. 1 is a flow chart of a fast positioning method according to an embodiment of the present invention
FIG. 2 is a schematic engine positioning diagram of an embodiment of the present invention.
Fig. 3 is a schematic view of a mechanically suspended cab positioning of an embodiment of the invention.
In the figure: (E1, E2, E3) engine positioning, (C1, C2) mechanical suspension cab positioning, H0Difference between static load radius of tire and front axle drop, H1Height difference between I-beam of front axle and oil sump of engine, H2Height of engine, HE1Height of engine sump, HE2Height of engine block, H3Height difference between engine and mechanical suspension of rear floor of cab, HEHeight of engine from ground HEHeight of engine from ground HCHeight of floor above ground before the mechanically suspended cab, CbThe difference in the height of the front and rear floors of the mechanically suspended cab.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The final positioning of the engine (E1, E2, E3) based on the mechanically suspended cab engine and the cab quick positioning method according to the embodiment of the present invention will be described with reference to fig. 2. In the embodiment, the origin of coordinates O is the intersection point of the lower airfoil surface of the frame, the central plane of the front axle and the central symmetrical plane of the frame; e1 is the distance between the center line of the engine crankshaft and the lower wing surface of the frame, E2 is the angle between the center line of the engine crankshaft and the lower wing surface of the frame, and E3 is the length of the center line of the engine crankshaft along the angle direction of E2.
The final positioning of the mechanically suspended cab (C1, C2) based on the engine of the mechanically suspended cab and the quick positioning method of the cab according to the embodiment of the present invention will be described with reference to fig. 3. In the embodiment, C1 is the distance between the center of mass point of the mechanical suspension cab and the lower airfoil surface of the frame; c2 is the distance of the mechanically suspended cab centroid point from the front axle center plane.
The invention discloses a mechanical suspension cab-based engine and cab rapid positioning method, and a flow chart is shown in fig. 3, wherein the positioning method comprises the following steps:
step 1, inputting initial positioning: the method comprises the steps of initial positioning of an engine (E10, E20, E30) and initial positioning of a mechanical suspension cab (C10, C20);
step 2, judging the height H of the engine from the groundEHeight difference H between front axle I-beam and engine oil pan1Whether or not to satisfy HEAnd H1The corresponding control requirements are as follows: outputting the height H of the engine from the ground after inputting the initial positioning (E10, E20, E30) of the engineEStep 2 is carried out to judge HEWhether or not to satisfy HEControl requirement when HESatisfy HEOutputting the height difference H between the I-beam of the front axle and the oil pan of the engine according to the control requirement1And to H1Making a judgment as to whether H is satisfied1Control requirement when H1Satisfy H1Control request is then output H1(ii) a Otherwise, when HEAnd H1Do not satisfy corresponding HEAnd H1Returns to step 1 to readjust the input engine initial position (E10, E20, E30);
step 3, judging the height difference H between the engine and the mechanical suspension cab floor3Whether or not to satisfy H3The control requirements are as follows: when the input mechanical suspension cab is initially positioned (C10, C20), the height difference H between the output engine and the mechanical suspension cab floor is output3Proceed step 3 to judge H3Whether or not to satisfy H3Control requirement when H3Satisfy H3Control request is then output H3(ii) a Otherwise, when H3Does not satisfy H3When the control requires, returning to the step 1 to readjust the initial positioning of the input mechanical suspension cab (C10, C20);
step 4, judging the ground clearance H of the floor before the mechanical suspension cabCWhether or not to satisfy HCThe control requirements are as follows: after the steps 1, 2 and 3 are finished, according to a ground clearance target function f (H) of a floor in front of a mechanical suspension cab0,H1,H2,H3)＝β[H0+γH1+(HE1+HE2)+αH3]-CbFind HCStep 4 is carried out to judge HCWhether or not to satisfy HCControl requirement when HCSatisfy HCIf the control requirement is met, performing step 5; otherwise, when HCDoes not satisfy HCWhen the control requires, the control returns to the step 1 to readjust the initial positioning of the engine (E10, E20, E30), the initial positioning of the mechanical suspension cab (C10, C20) and the height H of the oil pan of the engineE1In the formula: h0The difference value between the static load radius of the tire and the front axle drop is obtained; hE1Is the engine sump height; hE2Is the engine block height; cbThe height difference of the front floor and the rear floor of the mechanical suspension cab is obtained; beta is the ground clearance control coefficient of the floor before the mechanical suspension cab; gamma is a height difference control coefficient of the front axle I-beam and the engine oil pan; alpha is the height difference control coefficient of the rear floor of the engine and the mechanical suspension cab;
step 5, outputting final positioning: including final engine positioning (E1, E2, E3) and final mechanical suspension cab positioning (C1, C2).
In the present embodiment, the engine height from the ground HEThe control requirement is more than or equal to 290 mm;height difference H between I-shaped beam of front axle and engine oil pan1The control requirement is more than or equal to 35 mm; height difference H between rear floor of engine and mechanical suspension cab3The control requirement is more than or equal to 45 mm; mechanical suspension cab front floor ground clearance HCThe control requirement is that the thickness is equal to or less than 832 mm; the ground clearance control coefficient beta of a front floor of a mechanical suspension cab is 1; the height difference control coefficient gamma of the front axle I-beam and the engine oil pan is 1.14; the height difference control coefficient alpha of the front floor of the engine and the mechanical suspension cab is 1.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the present invention.
Claims (3)
1. An engine based on a mechanical suspension cab and a cab rapid positioning method are characterized in that the positioning method comprises the following steps:
step 1, inputting initial positioning: the method comprises the steps of initial positioning of an engine (E10, E20, E30) and initial positioning of a mechanical suspension cab (C10, C20);
step 2, judging the height H of the engine from the groundEHeight difference H between front axle I-beam and engine oil pan1Whether or not to satisfy HEAnd H1The corresponding control requirements are as follows: outputting the height H of the engine from the ground after inputting the initial positioning (E10, E20, E30) of the engineEStep 2 is carried out to judge HEWhether or not to satisfy HEControl requirement when HESatisfy HEOutputting the height difference H between the I-beam of the front axle and the oil pan of the engine according to the control requirement1And to H1Making a judgment as to whether H is satisfied1Control requirement when H1Satisfy H1Control request is then output H1(ii) a Otherwise, when HEAnd H1Do not satisfy corresponding HEAnd H1Returns to step 1 to readjust the input engine initial position (E10, E20, E30);
step 3, judging engine and mechanical suspension drivingHeight difference of floor3Whether or not to satisfy H3The control requirements are as follows: when the input mechanical suspension cab is initially positioned (C10, C20), the height difference H between the output engine and the mechanical suspension cab floor is output3Proceed step 3 to judge H3Whether or not to satisfy H3Control requirement when H3Satisfy H3Control request is then output H3(ii) a Otherwise, when H3Does not satisfy H3When the control requires, returning to the step 1 to readjust the initial positioning of the input mechanical suspension cab (C10, C20);
step 4, judging the ground clearance H of the floor before the mechanical suspension cabCWhether or not to satisfy HCThe control requirements are as follows: after the steps 1, 2 and 3 are finished, according to a ground clearance target function f (H) of a floor in front of a mechanical suspension cab0,H1,H2,H3)＝β[H0+γH1+(HE1+HE2)+αH3]-CbFind HCStep 4 is carried out to judge HCWhether or not to satisfy HCControl requirement when HCSatisfy HCIf the control requirement is met, performing step 5; otherwise, when HCDoes not satisfy HCWhen the control requires, the control returns to the step 1 to readjust the initial positioning of the engine (E10, E20, E30), the initial positioning of the mechanical suspension cab (C10, C20) and the height H of the oil pan of the engineE1In the formula: h0The difference value between the static load radius of the tire and the front axle drop is obtained; hE1Is the engine sump height; hE2Is the engine block height; cbThe height difference of the front floor and the rear floor of the mechanical suspension cab is obtained; beta is the ground clearance control coefficient of the floor before the mechanical suspension cab; gamma is a height difference control coefficient of the front axle I-beam and the engine oil pan; alpha is the height difference control coefficient of the rear floor of the engine and the mechanical suspension cab;
step 5, outputting final positioning: including final engine positioning (E1, E2, E3) and final mechanical suspension cab positioning (C1, C2).
2. The engine based on the mechanical suspension cab and the cab rapid positioning method according to claim 1, wherein in the step 4, a ground clearance control coefficient β of a front floor of the mechanical suspension cab is a set fixed value, and a value range of β is 0.97-1.01; the height difference control coefficient gamma of the front axle I-beam and the engine oil pan is a set fixed value, and the value range of gamma is 0.93-1.16; the height difference control coefficient alpha of the rear floor of the engine and the mechanical suspension cab is a set fixed value, and the value range of alpha is 0.98-1.05.
3. The mechanically suspended cab-based engine and cab quick positioning method according to claim 1, wherein the height H of the engine from the ground isEThe control requirement is more than or equal to 290 mm; height difference H between I-shaped beam of front axle and engine oil pan1The control requirement is more than or equal to 35 mm; height difference H between engine and mechanical suspension cab floor3The control requirement is more than or equal to 45 mm; mechanical suspension driver's cabin floor ground clearance HCThe control requirement is equal to or less than 832 mm.
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| CN202110305232.8A CN112849281B (en) | 2021-03-18 | 2021-03-18 | Engine based on mechanical suspension cab and cab rapid positioning method |
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| CN202110305232.8A CN112849281B (en) | 2021-03-18 | 2021-03-18 | Engine based on mechanical suspension cab and cab rapid positioning method |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4813736A (en) * | 1986-05-28 | 1989-03-21 | Man Nutzfahrzeuge Gmbh | Driver's cabs |
| JP2001199368A (en) * | 2000-01-17 | 2001-07-24 | Hino Motors Ltd | Vehicular body for cab-over-engine vehicle |
| CN103121475A (en) * | 2013-03-08 | 2013-05-29 | 山东理工大学 | Design method for optimal damping ratio of suspension system of cab |
| CN106289809A (en) * | 2016-10-25 | 2017-01-04 | 吉林大学 | A kind of with H point device with the use of instrument board blind area measurement apparatus and localization method |
-
2021
- 2021-03-18 CN CN202110305232.8A patent/CN112849281B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4813736A (en) * | 1986-05-28 | 1989-03-21 | Man Nutzfahrzeuge Gmbh | Driver's cabs |
| JP2001199368A (en) * | 2000-01-17 | 2001-07-24 | Hino Motors Ltd | Vehicular body for cab-over-engine vehicle |
| CN103121475A (en) * | 2013-03-08 | 2013-05-29 | 山东理工大学 | Design method for optimal damping ratio of suspension system of cab |
| CN106289809A (en) * | 2016-10-25 | 2017-01-04 | 吉林大学 | A kind of with H point device with the use of instrument board blind area measurement apparatus and localization method |
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| CN112849281B (en) | 2022-07-22 |
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