COPYRIGHT 2001-2024 © HOOHA WIRE&CABLE PRODUCTS ALL RIGHTS RESERVED.
Changes in electronic systems have driven hardware changes: strict injection standards, more complex diagnostic systems, direct injection systems, high-temperature operating environments, improved fuel utilization, electromechanical solid state evolution, multi-function/integrated/electromechanical equipment.
In this way, process card design and process information management become the most important and labor-intensive tasks. The manual design method of the process card and the traditional process information and management methods of various technical materials have been difficult to meet the requirements of modern production. Automobile wire harness manufacturers urgently need to develop an effective process card design and information management system to promote Computerization and standardization of enterprise process card design and information management, reducing labor intensity of process personnel, shortening process design cycle, and improving process design efficiency and quality.
The automobile wiring harness is a wiring component for connecting various electrical equipment in the circuit, and is composed of a wire, a terminal, a sheath, a tape, a PVC pipe, a bellows, a waterproof heat-shrinkable pipe, and some auxiliary materials, such as a package, a protective material, and the like. In order to facilitate the installation and maintenance, and to ensure that the electrical equipment can work under the most severe conditions, the wires of different specifications and different colors used in the electrical equipment of the whole vehicle are properly arranged and integrated, and the wires are bundled into bundles with insulating materials. This is both complete and reliable.
The main basis of the car wiring harness design is the schematic diagram of the whole vehicle circuit. Therefore, the circuit schematic must be designed before the harness design. The installation position of the electrical components determines the path of the harness. The wires connecting the electrical components are made in a single wire. A wire harness is formed by combining the connecting wires of the partial electrical components into a group.
The design process of the inline automotive wiring harness design process is the operation required by the designer to complete the inline design in an interactive environment, generally including operations such as inline point selection, middle segment information input, and trunk merging. The inline point selection is the main step of the design. . The inline relationship extracted from the wire harness diagram is essentially an undirected graph, and operations such as inline process card drawing and material statistics cannot be completed according to the online relationship. The user-selected inline point, while adjusting the topology, classifies it into a tree structure, and its root is the main inline point in the inline point. The interactive environment provides the existing inline points related to this inlining, assists the designer to make inline point selection, and the inline data structure changes after the inline point and the main inline point are determined.
In the entire automotive electrical system, the power supply circuit is the most important. Therefore, when selecting the cross-sectional area of the power supply conductor, when the rated output current of the generator is greater than the total current required by all the electrical equipment of the vehicle, the generator can be rated. The output current value is considered as the allowable value of the wire. However, when the total current required for the operation of the vehicle's electrical equipment is greater than the rated current of the generator output, the total operating current value shall be used as the allowable current to determine the cross-sectional area of the power circuit conductor. In order to ensure reliable operation of the electrical equipment, especially when starting, the lower the voltage drop, the better, because the starting current of the starting machine is larger when starting, for example, the starting current of the starting machine on the vehicle is the largest, which will result in a larger Pressure drop.
Crosstalk is generated between the wires by inductive coupling and capacitive coupling of parasitic parameters. The inductive coupling and capacitive coupling of the circuit exist at the same time. There are three cases: the inductive coupling is dominant, the capacitive coupling is negligible, the near-end crosstalk of the circuit is approximately inductive coupling, and the capacitive coupling is dominant. Inductive coupling is neglected, the near-end crosstalk of the circuit is approximately inductive coupling; the capacitive coupling and the inductive coupling have the same weight, which coupling cannot be ignored, and the near-end crosstalk of the electron beam circuit is the sum of inductive and capacitive coupling, but this situation rarely occurs. In general, crosstalk is either dominant inductive coupling or capacitive coupling predominates.
In order to provide the most flexible data access methods for automotive wire harness design developers, database drivers are designed to provide both pull and push models for data access. In the pull model, the driver will connect to the database and bring in the data as needed. When using this model, the connection to the database and the commands that are executed to get the data are handled by themselves, and no developer is required to write the code. If you don't need to write any special code at runtime, use the pull model.
The grounding point of the wheel is located at the rear end of the extension of the kingpin, and the wheel is pulled backward by the rolling resistance in motion so that the direction of the wheel naturally faces the direction of the front. The caster rear caster angle and the kingpin trim shift distance will make the steering wheel produce a straight-line driving effect.
