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Appendix 3

United Kingdom

Original text. Later amendments are not shown.

Types of dual-fuel engines operated on natural gas/biomethane or LPG and a liquid fuel — illustration of the definitions and main requirements

Dual-fuel typeGERcycle Idle on liquid fuelWarm-up on liquid fuelOperation on liquid fuel solelyOperation in absence of gasComments
1A

GERNRTC, hot ≥ 0,9 or

GERNRSC, ≥ 0,9

NOT allowedAllowed only on service modeAllowed only on service modeService mode
1B

GERNRTC, hot ≥ 0,9

or

GERNRSC ≥ 0,9

Allowed only on liquid-fuel modeAllowed only on liquid-fuel modeAllowed only on liquid-fuel and service modesLiquid-fuel mode
2A

0,1 < GERNRTC, hot < 0,9

or 0,1 < GERNRSC < 0,9

AllowedAllowed only on service modeAllowed only on service modeService mode

GERNRTC, hot ≥ 0,9

or

GERNRSC ≥ 0,9

Allowed

2B

0,1 < GERNRTC, hot < 0,9

or 0,1 < GERNRSC < 0,9

AllowedAllowedAllowedLiquid-fuel mode

GERNRTC, hot ≥ 0,9

or

GERNRSC ≥ 0,9

allowed

3ANeither defined nor allowed
3B

GERNRTC, hot ≤ 0,1

or

GERNRSC ≤ 0,1

AllowedAllowedAllowedLiquid-fuel mode