Fuel Lines
For over 40 years, COHLINE has been supplying fuel system lines to renowned automotive manufacturers. Fuel lines transport fuel from the tank to the engine. They are typically made of metal or plastic and may have different diameters and connections depending on the vehicle type.
Sensor Cables
Media-carrying lines with integrated sensors are special lines that not only serve for the transportation of liquids, gases, or other media but also feature integrated sensors to capture and monitor various parameters of the medium. This type of lines is often employed in industrial applications where continuous monitoring and control of the medium are necessary. Sensor lines can be found in various systems of the vehicle.
Aqueducts
No matter what the challenge is: high media temperature, radiant heat or media resistance - COHLINE always has the right solution for you with its portfolio of materials and heat protection agents. We are happy to design the lines in your installation space.
For cooling electronic components
As e-mobility advances, the cooling of electronic components is becoming increasingly important. COHLINE supplies suitable and cost-effective solutions, e.g. for battery or control unit cooling.
For cooling combustion engines
Tight installation spaces and high power density lead to high temperatures in the units such as the engine and turbocharger. The task of the cooling water is to efficiently dissipate this heat.
Coolant-water mixtures are used in vehicles to dissipate heat from heat sources and to supply it to other places such as the interior heating. Excess heat is directed to the vehicle radiator, which is located in the front end and is flowed through by the air flow, and the cooled coolant is fed back into the engine system.
The coolant is transported between the individual units and components via lines which, depending on the application requirements, can consist of various material mixtures.
Different designs and materials:
- Pipe parts are usually made of aluminum
- For hotter applications, stainless steel pipe is used
- At lower temperatures, plastic pipe is used
Tolerance and movement compensation between the components is ensured either by hose components or by the geometry of the components. We also use different materials for the hoses depending on the application of pressure and temperature (EPDM, VMQ, PTFE).
In addition, the components can be protected from heat radiation by applying a protective layer to the cable from the outside.
Various protection options:
- heat protection hoses
- heat protection mats
- heat shields
Turbo Charger Lines
- Charge Air Line: The charge air line transports the compressed air from the turbocharger to the engine's intake ports. It is usually made of metal pipes or hoses that can withstand the high pressures and temperatures that occur in the charge air system.
- Compressed Air Line: This line transports the compressed air from the air intake system or from a separate compressed air compressor to the turbocharger. It ensures that the turbocharger is properly supplied with sufficient air flow for compression.
- Oil Feed Line: Turbochargers require lubricating oil to operate smoothly and to cool down. The oil feed line transports the engine oil from the engine's oil circuit to the turbocharger to ensure adequate lubrication and cooling.
- Oil Drain Line: This line allows the cooled and used engine oil to flow back from the turbocharger to the engine's oil circuit. It ensures that the oil drains properly and the lubrication of the turbocharger is maintained.
- Cooling Water Line: A turbocharger system can include a water cooling system, which is supplied with appropriate cooling water lines.
Different designs and materials:
- elastomer hoses
- PTFE hoses with stainless steel braiding
- stainless steel pipe
- stainless steel bellows tube
- stainless steel corrugated hose
In addition, the components can be protected from heat radiation by applying a protective layer to the cable from the outside.
Various protection options:
- heat protection hoses
- heat protection mats
- heat shields
Dipstick Guide Tubes
Different designs and materials:
- aluminum
- Steel
- PA
- with mounted oil dipstick (on request)
Various connection options:
- Holder soldered e.g. aluminium or steel
- Holder moulded e.g. plastic
Brake Lines
COHLINE hydraulic brake lines are manufactured to the highest safety requirements:
- Developed with an inner and outer layer of EPDM with a two-layer pressure carrier made of PET and an intermediate layer of SBR+NBR, they are resistant to DOT 3 and DOT 4 and most non-petroleum-based brake fluids.
- They comply with the specifications of SAE standard J 1401, FMV SS 106, GB 16897 and DIN ISO 3996. COHLINE's extensive range of hydraulic fittings can be used in all standard vehicles.
- The fittings are Cr6-free galvanized, silver-transparent passivated and compliant with EU recommendations 2000/53/EC and 2002/95/EC.
COHLINE manufactures hydraulic brake hoses according to customer-specific requirements.
Cohline Brake Lines- the safety lines of vehicles
For original COHLINE brake lines, the highest quality requirements for materials and workmanship are a must. COHLINE is certified according to IATF 16949, ISO 14001 and ISO 45001. Our promise to our customers: We develop and produce our products according to an internationally recognized quality and environmental management system.
COHLINE brake pipes type 1035 are double-walled rolled pipes made from a single flat strip, which are coated with copper on the inside and outside. In addition, the pipes are galvanized on the outside and coated with a PVF plastic. In the salt spray test according to SS DIN 50021, the corrosion protection is 3,300 hours.
Engine Oil Lines
There are several types of engine oil cooler lines, depending on the vehicle configuration and the design of the oil cooler system. The most common types include:
- Supply lines carry the hot engine oil from the engine to the oil cooler. They are usually connected to the oil filter or the engine's oil circuit and transport the oil to the oil cooler where it is cooled
- Return lines carry the cooled engine oil from the oil cooler back to the engine. The cooled oil is fed through these lines back into the engine's oil circuit to continue the lubrication process.
Different designs and materials:
- Steel
- Stainless steel
- Aluminium (bare, PA-coated)
- Polyamide pipe PA 6.10, PA 6.12
- Elastomers such as AEM can be made with a corresponding pressure carrier mesh depending on the requirements
Tolerance and movement compensation is ensured either by a hose component or the geometry of the line in the case of plastic lines. The interfaces to the engine and cooler are sealed using an O-ring, which can be located on a turned part, a compression joint or in a connector. In the case of plastic lines, the connecting components (gearbox connection, connector) are either pushed in or welded on.
Hydrogen Lines
Hydrogen pipelines transport hydrogen gas from one place to another. They must meet specific requirements because hydrogen is a very reactive gas. There are different types of hydrogen pipelines, depending on the pressure and temperature conditions and the specific applications.
Application:
- Hydrogen for high pressure applications up to 700 bar or more
- Hydrogen for low-pressure applications up to 25 bar
- For fuel cells, for tank systems, for combustion engines
Different designs and materials:
- stainless steel pipe for high-pressure application
- plastic pipe for low-pressure application
- pipe-hose combination for low-pressure application
Various connection fittings:
- ball head
- sealing cone (low pressure)
- O-ring (low pressure)
- VOSS locomotive 40
- Swagelok
Oil Transmission Lines
The cooler, which is supplied by the transmission oil cooler lines, can either be a separate cooler or integrated into the vehicle radiator. The cooling medium that flows through the cooler can be air or cooling liquid, such as engine coolant.
Different designs and materials:
- Steel
- Stainless steel
- Aluminium
- Plastics
- Elastomers such as AEM can be made with a corresponding pressure carrier mesh depending on the requirements
Tolerance and movement compensation is ensured either by a hose component or the geometry of the line in the case of plastic lines. The interfaces to the gearbox and cooler are sealed using an O-ring, which can also be located in a connector.