CN202871343U - Shielded cable for automotive engine - Google Patents

Shielded cable for automotive engine Download PDF

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Publication number
CN202871343U
CN202871343U CN 201220605812 CN201220605812U CN202871343U CN 202871343 U CN202871343 U CN 202871343U CN 201220605812 CN201220605812 CN 201220605812 CN 201220605812 U CN201220605812 U CN 201220605812U CN 202871343 U CN202871343 U CN 202871343U
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CN
China
Prior art keywords
core
cores
digital signal
transmission line
cable
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
CN 201220605812
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Chinese (zh)
Inventor
蔡顺祥
张�浩
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Beijing Splwire & Cable Co Ltd
Original Assignee
Beijing Splwire & Cable Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Beijing Splwire & Cable Co Ltd filed Critical Beijing Splwire & Cable Co Ltd
Priority to CN 201220605812 priority Critical patent/CN202871343U/en
Application granted granted Critical
Publication of CN202871343U publication Critical patent/CN202871343U/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Abstract

The utility model relates to a shielded cable for an automotive engine. The shielded cable is provided with four digital signal transmission line cores which are arranged in parallel, wherein the four transmission line cores are parallelly arranged in a cross-shaped symmetry manner, and a shielded wire core is arranged between two adjacent transmission line cores; the four digital signal transmission line cores and the four shielded wire cores form a composite cable core, the exterior of the composite cable core is provided with a spiral lapping type shielding layer, and a flame retardant sheath of 150 DEG C is arranged outside the spiral lapping type shielding layer; and the digital signal transmission line cores are formed by multiple copper wire bundles which are coated by thermoplastic flame retardant insulating layers of 150 DEG C, and the shielded wire cores are electrically connected with the inner surface of the spiral lapping type shielding layer. The shielded cable provided by the utility model has the advantages that the shielding performance is good, the anti-interference ability is good, the heat-resisting level is high, reaching a heat-resisting level of 150 DEG C.

Description

The shielded type cable that is used for automobile engine
Technical field
The utility model relates to a kind of shielded type cable for automobile engine, and four parallel digital signal transmission line cores that arrange are arranged, and four transmission lines cores are symmetrical parallel setting of cross, between two adjacent described transmission cores the shielding core are set.
Background technology
Chinese patent 200420022074.7 discloses a kind of bus control system for car, its main feature is, described bus control system for car comprises control box behind a master control box, front control box and, is connected by the CAN bus between described master control box, front control box and the rear control box.Adopt the bus control system for car of this kind structure, obviously reduced the rat tail from the automotive front to the rear portion.In order to satisfy various electronic signals and automatically controlled information accuracy between the automobile electronic control unit, the transmission cable that design meets the automotive bus system special use has great significance.Because the environment of running car engineering is abominable, present automobile bus cable temperature resistant grade does not reach 150 ℃, can not be used for the transmission of automobile engine internal sensor signal.For this reason, need to propose a kind of new shielded type cable that is used for automobile engine.
Summary of the invention
The purpose of this utility model is to provide a kind of shielded type cable for automobile engine, this cable has four parallel transmission cores that arrange, four transmission lines cores are symmetrical parallel setting of cross, article two, between the adjacent described transmission core shielding core is set, its outside arranges spiral winding packet mode screen, and screen arranges 150 ℃ of provided with flaming retardant cross-linked polyolefin sheaths outward.Screening effectiveness of the present utility model is issued to more than the 20dB or transfger impedance is not more than 225 milliohm/rice in the 1MHz frequency, good in anti-interference performance, and thermal endurance class is high, can reach 150 ℃ of thermal endurance classs; Also have good fire resistance, anti-wear performance and oil resistance.
The purpose of this utility model is realized by following technical proposals: a kind of shielded type cable for automobile engine, four parallel digital signal transmission line cores that arrange are arranged, described four transmission lines cores are symmetrical parallel setting of cross, article two, between the adjacent described transmission core shielding core is set, described four digital signal transmssion line cores and described four shielding cores consist of compound cable core, described compound cable core outside arranges spiral winding packet mode screen, and described spiral winding packet mode screen arranges 150 ℃ of fire retardant jackets outward; Described digital signal transmission line core is made of 150 ℃ of thermoplastic flame-proof insulating barriers of strand copper wire bundle outer cladding; Described shielding core is electrically connected with described spiral winding packet mode screen inner surface.
The utility model compared with prior art has following advantage:
1, because the utility model adopts the bare copper drain wire core to arrange with the transmission core is parallel, be provided with outside again spiral winding packet mode screen, guarantee that signal transmission is not subject to extraneous interference, screening effectiveness of the present utility model is issued to more than the 20dB or transfger impedance is not more than 225 milliohm/rice in the 1MHz frequency.
2, because digital signal transmission line core of the present utility model has adopted temperature-resistant insulation layer outward, compound cable core peripheral hardware has been put the high temperature-resistant cable sheath, can reach 150 ℃ of thermal endurance classs, be particularly suitable for being used in the engineering vehicle of working under automobile engine position and the various abominable condition.
3, the utlity model has good fire resistance, meet ISO14572 and ISO6722 standard.
Description of drawings
The utility model is described in further detail below in conjunction with drawings and Examples.
Fig. 1, structural representation of the present utility model.
Embodiment
Embodiment one:
(accompanying drawing only shows cross section of the present utility model referring to Fig. 1, vertical outside drawing of the present utility model omits), a kind of shielded type cable for automobile engine, four parallel digital signal transmission line cores 1 that arrange are arranged, described four transmission lines cores are symmetrical parallel setting of cross, article two, shielding core 2 is set between the adjacent described transmission core, described four digital signal transmssion line cores and described four shielding cores consist of compound cable core, described compound cable core outside arranges spiral winding packet mode screen 3, and described spiral winding packet mode screen arranges 150 ℃ of provided with flaming retardant cross-linked polyolefin sheaths 4 outward; Described digital signal transmission line core is made of 150 ℃ of thermoplastic flame-proof polyester elastomers of strand copper wire bundle outer cladding insulating barrier 11; Described shielding core is electrically connected with described spiral winding packet mode screen inner surface.Length of the present utility model can be designed to 50 meters~200 meters, also can be according to the needs of production and processing or use, and the size of processing, being designed to more grow.Shielded type cable of the present utility model is served the automotive electronic control system system exactly, guarantees that the data of transducer collection are transferred to receiver without distortion.
In the present embodiment, the shielding core of described digital signal transmission line core and naked copper all is cross and is symmetrical arranged, and the cross section of compound cable core is a cross flower shape; For transmission performance and the overall performance that improves cable, digital signal transmission line core and bare copper drain wire core twist together, and the wire diameter of shielding core is the 45%-65% in digital signal transmission line heart yearn footpath.Article four, digital signal transmssion line core is all kept at a distance equally on all line segments, is used for guaranteeing impedance parameter of the present utility model.The described wire diameter of present embodiment refers to the largest cross-sectional sized of core, if the circular section, wire diameter is exactly diameter, if oval cross section, wire diameter is exactly the size of long axis direction, by that analogy.
In the world, the data bus cable of developed country can only be accomplished 125 degree thermal endurance classs.In order to improve heat-resisting ability of the present utility model, the maximum operating temperature of the thermoplastic flame-proof polyester elastomer insulating barrier on the digital signal transmission line core (normal operation) is 150 ℃, and the maximum operating temperature of cable cover(ing) is 150 ℃.
In the present embodiment, compound cable core peripheral hardware is put spiral winding packet mode screen, article four, behind the shielding core twisted synthesizing cable of digital signal transmssion line core and four naked coppers, adopt the wrapped plant equipment of prior art, according to the spiral winding packet mode, in the mask tape of the overlapping wrapped containing metal composition of its outer surface, Duplication is 15%-25%, forms the transmission cable with screen; In the present embodiment, the material of described spiral winding packet mode screen is a kind of in aluminium-plastic tape, the compound copper-plastics band.In the use of reality, the shielding core of four naked coppers is electrically connected with ground connection (bonding) terminal on the automobile.In the present embodiment, the thickness of described 150 ℃ of thermoplastic flame-proof polyester elastomer insulating barriers is 0.2-0.4 millimeters, and preferred thickness is 0.3 millimeter, and the thickness of described 150 ℃ of provided with flaming retardant cross-linked polyolefin sheaths is 0.5-1 millimeters, preferred thickness is 0.6 millimeter, and the working temperature of shielded type cable is 150 ℃.
In the present embodiment, in order to improve performance of the present utility model and life-span, the digital signal transmission line core is the strand copper wire bundle, the sectional area of digital signal transmission line core is the 0.5-0.9 square millimeter, the copper line surface of the strand copper wire bundle of transmission in the core arranges antioxidation coating, and antioxidation coating is a kind of in tin coating, the silver coating.The strand copper wire bundle is by 12 stranded forming of naked soft circular copper wire, and naked soft circular copper wire diameter is 0.192 millimeter.
In the present embodiment, for the rounding property that improves impedance parameter of the present utility model, cable and the stability of structure, article four, digital signal transmssion line core and four bare copper drain wire cores twist together, twisting pitch is 15-25 times of a digital signal transmssion line core diameter, and the diameter of four bare copper drain wire cores is 45%-65% of digital signal transmission line core diameter; Article four, the centre distance between the digital signal transmssion line core is 1 times of a digital signal transmssion line core diameter; The digital signal transmission line core diameter can be chosen in 2.23-3.50 millimeter scope.
In bus control system for car, the requirement of wave impedance is 120 ohm.Signal is in transmission course, and cable need to guarantee impedance matching, and impedance matching refers to that load impedance (vehicle data bus) and driving source (source of data/address bus) internal driving are adaptive mutually, obtains a kind of operating state of maximum power output; When impedance matching was bad, signal can't continue to keep due stable and uniform transmission, and data controlling signal decay and reflection are large, so can't avoid interference spurious signal, thereby produce the control signal of misoperation, affect normal transfer of data, affect the normal use of equipment.Therefore, more near 120 ohm, transmission performance is better for the practical impedance of cable.

Claims (2)

1. shielded type cable that is used for automobile engine, it is characterized in that: four parallel digital signal transmission line cores that arrange are arranged, described four transmission lines cores are symmetrical parallel setting of cross, article two, between the adjacent described transmission core shielding core is set, described four digital signal transmssion line cores and described four shielding cores consist of compound cable core, described compound cable core outside arranges spiral winding packet mode screen, and described spiral winding packet mode screen arranges 150 ℃ of fire retardant jackets outward; Described digital signal transmission line core is made of 150 ℃ of thermoplastic flame-proof insulating barriers of strand copper wire bundle outer cladding; Described shielding core is electrically connected with described spiral winding packet mode screen inner surface.
2. the shielded type cable for automobile engine according to claim 1, it is characterized in that: the thickness of described 150 ℃ of thermoplastic flame-proof insulating barriers is 0.2-0.4 millimeters, the thickness of described 150 ℃ of fire retardant jackets is 0.5-1 millimeters.
CN 201220605812 2012-11-16 2012-11-16 Shielded cable for automotive engine Expired - Lifetime CN202871343U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201220605812 CN202871343U (en) 2012-11-16 2012-11-16 Shielded cable for automotive engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201220605812 CN202871343U (en) 2012-11-16 2012-11-16 Shielded cable for automotive engine

Publications (1)

Publication Number Publication Date
CN202871343U true CN202871343U (en) 2013-04-10

Family

ID=48038040

Family Applications (1)

Application Number Title Priority Date Filing Date
CN 201220605812 Expired - Lifetime CN202871343U (en) 2012-11-16 2012-11-16 Shielded cable for automotive engine

Country Status (1)

Country Link
CN (1) CN202871343U (en)

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CX01 Expiry of patent term
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Granted publication date: 20130410