Matsushita Electric Industrial Co., Ltd.

The High Pressure Gas Safety Institute of Japan

Nissan Motor Company Limited

Shinzo Kato

Takashi Uno

Shinichi Nakane

Hiroshi Horii

Mitsuo Namba

Namba Mitsuo

Reppei Uematsu

Uematsu Reppei

Nagao Nakamura

A flow rate of gas is measured with a flow rate measurement means and a 'consumption state' defined with a combination of maximum flow rate, the total amount and a consumption time of the gas is therefor detected. The consumption state is compared with a reference consumption condition which is represented by a predetermined consumption state, and when the consumption state exceeds the reference consumption condition, supply of the gas is interrupted. Furthermore, a monitor range of the consumption state is formed, and when a consumption state is present in the monitor range, the reference consumption condition is changed.

Gas shutoff apparatus

A gas flow rate is measured and therefrom 'consumption state' defined by combination of maximum flow rate, increase of total amount and a consumption time of the gas is detected, and then, the consumption state is compared with a 'reference consumption condition' representing a predetermined consumption state; and when the 'consumption state' exceeds the 'reference consumption condition', a gas control means interrupt supply of the gas; and thereafter, after restoration of the gas control means to gas supply state, the actual gas consumption state is measured for a predetermined time counted by timer when the gas flow rate exceeds a predetermined level.

In a carburetor system having a main fuel passage for supplying fuel from a float chamber to a main fuel discharge nozzle and an air bleed pipe inserted into the main fuel passage, there is provided an auxiliary air introduction passage for additionally supplying air so as to adjust the air fuel ratio. The auxiliary air passage comprises a primary air passage having an upstream end communicating with the atmosphere and a downstream end opening into the main fuel passage below the fuel level, and a secondary air passage which branches off from the primary air passage and opens into the main fuel passage at a predetermined height above the fuel level. The cross sectional area of the secondary air passage is smaller than that of the primary air passage.

Carburetor having air fuel ratio adjusting means

Growing community of inventors

Tokyo, Japan

Shinzo Kato