On the basis of only minor modification to the basic structure of a gasoline engine

the original single spark plug ignition was transformed into a double spark plug ignition. And three-dimensional simulation and experimental verification were carried out. Then

a comparative analysis of three different modes of using spark ignition

double spark synchronous and asynchronous ignitions was made. The results of the tests show that at the speed of 6500 r/min and under full load conditions

the best ignition advance angle for the single spark ignition is 29° in crank angle with an excess air ratio of 1.00

and for the double spark synchronous and asynchronous ignitions

the corresponding advance angles are 22°and 22°/24°

respectively

with an excess air ratio of 1.15. As observed

use of double spark asynchronous ignition allows the engine to have the best overall performance. Compared with the single spark ignition

it can increase the available work by 8.49%

and compared with the double spark synchronous ignition

it can improve available work by 3.60% with the reduction of burst pressure and compression work

and hence exhaust emissions. In the above tests

the engine is always controlled to operate in the non-detonation zone.