especially those in bad work condition and emission
was refitted into an LPGgasoline dual fuel automobile
the output power of LPG engine decreased and emission increased. Researches are made on these problems and measures are put forward to solve them. Testing results show that it is better for the car in use to be reconstructed before it is refitted into LPGgasoline dualfuel automobile. Improving the compression ratio of engine and adjusting the ignitionadvanced angle can resume the output and improve the emission character.