AN AIR CYLINDER FOR THE EXHAUST BRAKE SYSTEM OF AN AUTOMOBILE

摘要

An air cylinder for IIMJP the exhaust brake system of an automobile, having a compressed-air inlet end and a breathing-air outlet end, comprising a spring-loaded piston reciprocably disposed within the cylinder, the joint between the spring seat and cylinder wall at the said breathing-air outlet end being sealed; an air-inlet port at the compressed-air inlet end; at least one breather hole, at the said breathing-air outlet end, said breather hole being provided with a f^st valve member for allowing breathing-air outflow from the cylinder to atmosphere, during forward movement of the piston, said first valve member, preventing breathing-air inflow, from atmosphere, through the breather hole, into the cylinder; and a second valve member located at the compressed-air inlet port for allowing breathing-air inflow, from atmosphere through the compressed-air inlet port, into the spring side of the cylinder, during the return movement of the piston, said breathing-air inflow, to the spring side of the cylinder, taking place through a cross-hole provided in the piston-rod, said second valve member preventing air outflow from the cylinder to atmosphere.