What approval requirements must be met by an LPG system?
Before detailing the issues associated with the approval of individual components of an LPG system, it’s worth noting that the currently applicable laws are the result of amendment R01 introduced to the UNECE Regulation 67 (E67R01). The amendment concerns the connection of the multi-valve with the tank. Previously, there were two classes of tanks – A and B – which had a different design. Class A was designed for gas pressure of up to 3 MPa and class B for gas pressure of up to 4.5 MPa. The multi-valves used in them differed by the presence of a safety valve – type A had a safety valve while type B did not. Currently only Class A tanks are produced, which eliminates the problem with matching multi-valves. In accordance with E67R01 multi-valves must currently have adequate protections necessary for the use of Class A tanks. The issue of approval also applies to the manufacturers of LPG systems whose products, pursuant to UNECE Regulation 115, must comply with strict rules on emissions (Euro 4 standard) and the necessary co-operation between the LPG ECU and the EOBD system in the car. Regulation 115 also imposes the requirement of adequate power of an LPG-powered engine (0.7-1.15 of the nominal power of the base fuel powered engine) and enforces the compliance of all the elements of the LPG system with E67R01. Companies installing LPG systems in vehicles must also have the relevant documents authorizing them to install these systems in accordance with the applicable approval regulations.