A device for engine exhaust extraction improves engine performance and efficiency. A write driving control signal generating unit outputs a write enable signal and a precharge enable signal in response to a write control signal that corresponds to a heating period and a quenching period of the write data. The graphics processing unit is operative to compress at least a portion of the generated Z data, to write the compressed portion of Z data to the depth buffer via the depth buffer interface in a compressed format, to read portions of compressed Z data from the depth buffer via the depth buffer interface, and to decompress the compressed Z data read from the buffer. The differential pressure is delivered by controlling a system of valves that is connected to at least one higher pressure air conduit and at least one lower pressure air conduit or removes air to or from the waste transport conduit respectively. Height of each of the clasps is larger than that of each of the receiving holes of the engaging portions.