Title:
【発明の名称】ガス混合気のガス成分及び/又はガス濃度の検出方法
Document Type and Number:
Japanese Patent JPH07506905
Kind Code:
A
Abstract:
PCT No. PCT/DE94/00188 Sec. 371 Date Jan. 19, 1995 Sec. 102(e) Date Jan. 19, 1995 PCT Filed Feb. 19, 1994 PCT Pub. No. WO94/22007 PCT Pub. Date Sep. 29, 1994A method of determining at least one of gas constituents and gas concentrations of a gas mixture such as exhaust gas from an internal combustion engine includes producing a change in gas concentration of the gas mixture at a semiconductor gas sensor by pumping a variable supply of oxygen to the semiconductor gas sensor by means of a solid electrolyte pumping cell; detecting at least one reaction speed selected from the group consisting of adsorption speed and desorption speed caused by the change in gas concentration as a signal from the semiconductor gas sensor which is a reply function; evaluating the signal from the semiconductor gas sensor over time to provide a time response of the reply function; and comparing the time response of the reply function with a stored, standardized time response of different gas constituents whereby at least one of the gas constituents and the gas concentrations of the gas mixture are determined.
Inventors:
Hazel, Gerhard
Neumann, Harald
Riegel, Johann
Neumann, Harald
Riegel, Johann
Application Number:
JP52048994A
Publication Date:
July 27, 1995
Filing Date:
February 19, 1994
Export Citation:
Assignee:
ROBERT BOSCH GMBH
International Classes:
G01N27/12; G01N27/407; G01N27/419; (IPC1-7): G01N27/419; G01N27/12; G01N27/419
Attorney, Agent or Firm:
Toshio Yano (3 outside)