CEN EN 15431:2008 – Winter and road service area maintenance equipments — Power system and related controls — Interchangeability and performance requirements
1 Scope
This document applies to power systems equipped for the operation and able to drive implements and attachments such as snow ploughs and/or spreaders on winter service vehicles or mowers on road service area maintenance vehicles, equipped with front-mounting plates according to EN 1 5432.
The purpose of this standard is to ensure interchangeability of vehicles and implements. The minimum requirements on the performance and the components of the hydraulic system as well as the kind, the size and the location of the connecting elements between the vehicle and the implement are specified in this standard.
This standard does not deal with airport equipment.
This standard does not cover applications, where the implements need a continuous hydraulic oil flow exceeding 45 l/min.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references,only the edition cited applies. For undated references the latest edition of the referenced document (including any amendments) applies.
ISO 1 1 85, Road vehicles – Connectors for the electrical connection of towing and towed vehicles – 7-pole connector type 24 N (normal) for vehicles with 24 V nominal supply voltage
ISO 1 724, Road vehicles – Connectors for the electrical connection of towing and towed vehicles – 7-pole connector type 12 N (normal) for vehicles with 12 V nominal supply voltage
ISO 1 6028, Hydraulic fluid power – Flush-face type, quick-action couplings for use at pressures of 20 MPa (200 bar) to 31,5 MPa (315 bar) – Specifications
ISO 1 6844-2, Road vehicles – Tachograph systems – Part 2: Recording unit, electrical interface
3 Power System and related controls
3.1 Hydraulic system for municipal vehicles – Specifications
3.1.1 Drive of the oil pump
The oil pump shall be driven directly by the vehicle engine and independently from the vehicle drive train. A clutch or a coupling between the engine and the pump is permissible. A drive ratio between the engine and the pump is allowed.
3.1.2 Hydraulic Circuits
The hydraulic circuits must be open type circuits.
The hydraulic system consists in either one variable displacement pump or one or two constant pumps.
If there are two circuits, they shall provide flowrate and pressure independent at any working condition.
For each circuit there shall exist:
– one primary excess pressure protection device and
– one switching device for unpressurized circulation. Each circuit or both circuits together shall be equipped with an oil reservoir and a filter for protection of the hydraulic system.
3.1.3 Connection between the hydraulic system of the vehicle and the implements
Hydraulic connectors shall be ensured by the use of quick couplings, refer to 3.1 .1 0.
CEN EN 15431:2008 – Winter and road service area maintenance equipments — Power system and related controls — Interchangeability and performance requirements