Secondary air supply for IC engine comprises air supply line fitted to engine exhaust via connecting valve with backflow check device fitted between pipe and valve with air inlet slots which are narrower at valve end than pipe end

摘要

The secondary air supply for an IC engine comprises an air supply line fitted to the engine exhaust via a connecting valve with a backflow check device fitted between the pipe and valve. This has air inlet slots (3) which are narrower at the valve end than the pipe end, forming a baffle (5) which prevents backflow of exhaust.