Title:
【発明の名称】気体流量制御装置
Document Type and Number:
Japanese Patent JP2837844
Kind Code:
B2
Abstract:
A control system for internal combustion engines, including a first conduit for the flow of intake air, and a second conduit for the flow of natural gas to be mixed with the air for combustion. The flow of the air is variable over a range of mass flow rates during operation of the engine and an air mass sensor is positioned to sense the mass flow rate in the first conduit and generate a first flow rate signal indicating the mass flow rate. A natural gas mass sensor is positioned to sense the mass flow rate of the gas in the second conduit and to generate a second flow rate signal indicating the mass flow rate of the natural gas. The first and second flow rate signals are compared in an electronic controller that generates a control signal if the first and second flow rates vary from a predetermined ratio. The ratio is selected to provide a substantially stoichiometric ratio of air and natural gas. A valve is provided to adjustably control the flow rate of the natural gas in response to the control signal to maintain the preselected ratio. A sensor and shutoff valve are also provided for terminating the flow of the natural gas when its pressure falls below a predetermined pressure, allowing immediate flow of gasoline to the engine, thus assuring smooth, continued operation of the vehicle. A throttle body has a natural gas distribution ring in the throat of the body and provides a curtain flow of gas.
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Inventors:
DEIUITSUDO EICHI SUMISU
KENISU II MIRAA
KENISU II MIRAA
Application Number:
JP3688287A
Publication Date:
December 16, 1998
Filing Date:
February 19, 1987
Export Citation:
Assignee:
EASENSAAZU INC
International Classes:
F02D19/02; F02D19/06; F02M21/02; F02M21/04; G05D11/04; F23N1/02; G05D11/13; F02B43/00; (IPC1-7): G05D11/04; F02D19/02; F02D19/06; F02M21/02; F23N1/02; G05D11/13
Domestic Patent References:
| JP6112550A | ||||
| JP5596331A | ||||
| JP59147209U |
Attorney, Agent or Firm:
Minoru Nakamura (3 others)