Producer gas carburettor

摘要

Disclosed herein is a class of gas carburettor (9) for low calorific value gas for A/F ratio control to be used engines operating on producer gas with a load following capabilities. The gas carburettor has A/F ratio from 1.2:1 for producer gas to about 5:1 for biogas. The gas carburettor of the present invention has right A/F control at varying load conditions due to its optimized dimensions at the throat (7) and area ration control flapper (6) along with the zero pressure regulators. Additionally, using a by-pass facility starting the engine is established. By the use of a zero pressure regulator on the gas line, the gas pressure in the air and gas lines are maintained nearly the same downstream of the carburettor which helps in managing the appropriate air-to-fuel ratio based on the gas and air passage areas.

主权项

1. A gas carburettor (9) comprising:
(a) an air inlet (1) leading to an air passage (2) and a gas inlet (3) leading to a gas passage (4); (b) a common section (5) downstream of the air passage and the gas passage, the common section having a throat (7) leading from the air passage and the gas passage to a mixing zone (10); (c) an adjustable flapper (6) located at least partially in the throat, the flapper separating the air passage from the gas passage; (d) means for supplying air to the common section (5); (e) means for supplying gas to the common section (5); and (f) a zero pressure regulator (12) for providing the air and the gas at a regulated pressure; (g) a bypass line (16) upstream of the zero pressure regulator (12) for gas flow during start up; and (h) a valve provided on the bypass line (16) for opening and closing during start up.