CEE-ONU 79 Uniform Provisions Concerning the Approval of Steering Equipment of Vehicles

Regulation No. 79, published by the United Nations Economic Commission for Europe (CEE-ONU), contains uniform provisions regarding the approval of steering equipment for vehicles. The aim of this regulation is to establish uniform provisions for the arrangement and performance of steering systems fitted to vehicles used on the road. Generally, the main requirement is that the main steering system includes steering control to determine the vehicle's course, normally a positive mechanical linkage between the steering wheel and the road wheels.

Emerging technology, the desire to improve passenger safety by eliminating the mechanical steering column, and the manufacturing advantages associated with easier transfer of steering control between left- and right-hand drive vehicles focus on a review of the traditional approach. According to the new legislation, it is now possible to have steering systems in which there is no positive mechanical link between the steering control and the road wheels.

This Regulation applies to steering gear of vehicles of category M, N and O (1).

CEE-ONU 79 does not apply to the following systems and equipment:

• Steering equipment with fully pneumatic transmission
• autonomous steering systems
• Full hydraulic steering systems fitted to trailers where the energy required for operation is transmitted from the towing vehicle
• Electrical control of full hydraulic steering systems fitted to trailers, excluding additional steering equipment

For the purposes of the said legal regulation,

• The term steering gear refers to all equipment whose purpose is to determine the vehicle's direction of movement. Steering equipment consists of: steering control, steering transmission, steered wheels and energy source, if applicable.
• The term steering control refers to the part of the steering equipment that controls the operation. The steering can be operated with or without direct intervention from the driver. For steering equipment where steering forces are solely or partly provided by the muscular effort of the driver, steering control includes all parts to the point where steering effort is converted by mechanical, hydraulic or electrical means.
• The term steering transmission refers to all components that form a functional link between the steering control and the road wheels.

Among the numerous test, measurement, analysis and evaluation studies it provides for businesses in various sectors, our organization also provides test services for the approval of steering gear of vehicles, within the scope of CEE-ONU 79 regulation, with its trained and expert staff and advanced technological equipment.