The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 26, 2010
Filed:
May. 12, 2003
Takashi Sasaki, Shioya-gun, JP;
Hiroyuki Abe, Utsunomiya, JP;
Tsuyoshi Eguchi, Utsunomiya, JP;
Akihiro Suzuki, Utsunomiya, JP;
Takashi Sasaki, Shioya-gun, JP;
Hiroyuki Abe, Utsunomiya, JP;
Tsuyoshi Eguchi, Utsunomiya, JP;
Akihiro Suzuki, Utsunomiya, JP;
Honda Motor Co., Ltd., Tokyo, JP;
Abstract
A control apparatus for a gas sensor with a built-in heater is provided which can prevent damage to, deterioration of, and reduction in accuracy of detection of, a gas sensor. When an ignition switch is turned ON, supply of electricity to a heaterstarts, and when the temperature in the vicinity of a gas sensor(gas temperature of gas detection chamber) Ts becomes greater than a predetermined temperature #Ti at start, or when a predetermined electricity supply time after start of supply of electricity to the heaterhas elapsed, the gas sensoris started. The flow of off-gas is started simultaneously with starting of the gas sensor, or after starting. When the ignition switch is turned OFF, the flow of off gas is stopped, and the supply of electric power to the gas sensoris stopped. In a state where a temperature difference ΔT between the gas temperature Ts inside the gas detection chamber, and an upstream gas temperature Tg is maintained within a predetermined range, the supply of electricity to the heateris stopped after a predetermined time has elapsed after operation of the gas sensoris stopped.