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17
JUN
FEATURED PRODUCT | Bearings in viscous clutches

June 17, 2021

The viscous clutch is a fundamental element of the cooling system in commercial vehicles. This component often undergoes great workloads to face the demanding cooling requirements of this type of vehicles.

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02
JUN
DID YOU KNOW THAT COJALI CLUTCHES AND FANS INCLUDE INSTALLATION GUIDES AND TECHNICAL RELEASES?

June 2, 2021

There are some viscous clutch references whose assembly process might prove complex or differ from the usual one. Therefore, in order to facilitate the clutch installation to our clients, we have designed installation guides that explain in detail the steps that should be followed.

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01
JUN
New Cojali Products June 2021

June 1, 2021

Documents about new Cojali products are now available.

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27
MAY
JALTEST TOOLS |How to use multimeters

May 27, 2021

In Jaltest Tools, the product range designed to supply workshops with professional equipment, you will find different multimeters with special features depending on your vehicle needs.

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25
MAY
COJALI S. L. PRESENTS ITS NEW SALES OFFICE IN GERMANY

May 25, 2021

We are proud to announce the recent opening of a new sales office in Germany, in addition to those that Cojali already has in Russia, Turkey and Mexico, and to our subsidiaries in France, Italy and the USA.

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24
MAY
DID YOU KNOW THAT COJALI HAS A CNC MACHINING LINE TO MANUFACTURE CLUTCH COMPONENTS?

May 24, 2021

As we have demonstrated in previous posts, the shaft of an electromagnetic viscous clutch is responsible for withstanding the control coil and the clutch frame where the fan is assembled, as well as connecting both the clutch and the vehicle. That is why the manufacturing tolerances of this component are very low.

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18
MAY
DID YOU KNOW HOW A VISCOUS CLUTCH WITH BIMETALLIC ACTIVATION WORKS?

May 18, 2021

The activation of this clutch is performed by a bimetal, in other words, by two assembled alloys with different expansion coefficients.

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14
MAY
COOLING SYSTEMS | Fan CFD simulation

May 14, 2021

The fan is an essential element in the vehicle cooling system. A bad choice of this device can cause the temperature to increase, implying considerable wear in the engine system components.

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11
MAY
DID YOU KNOW WHAT A HALL EFFECT SENSOR IS AND WHAT IS IT USED IN A VISCOUS CLUTCH FOR?

May 11, 2021

In viscous clutches with electromagnetic activation, it is very frequent for the ECU to receive a signal from the clutch indicating the fan rotational speed. This process is carried out thanks to the shared work of the hall effect sensor, located in the inner part of the control coil, and the magnetic ring.

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04
MAY
DID YOU KNOW HOW A VISCOUS CLUTCH WITH ELECTROMAGNETIC ACTIVATION WORKS?

May 4, 2021

Most clutches commercialised by Cojali are characterised by having an electromagnetic activation method. This type of clutch allows large control of the fan rotation speed rate and the response times, which leads to more efficiency since the fuel consumption decreases.

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03
MAY
New Cojali Products May 2021

May 3, 2021

Documents about new Cojali products are now available.

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30
APR
COOLING SYSTEMS | Quality management with three-dimensional machine in the receipt of parts

April 30, 2021

In Cojali, every component of a viscous clutch that arrives at our facilities undergoes a metrological inspection through a customised programme for each reference.

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