Document Type and Number:
Japanese Patent JPH0559246
Kind Code:
B2
Abstract:
PURPOSE:To dissolve the erroneous detection for back pressure in transient opetration by suppressing the regeneration for a trap even if the back pressure exceeds a prescribed value when the operation conditions such as the opening degree of an accelerator, etc. are unstable. CONSTITUTION:A particulate trap 36 is installed into the exhaust pipe 32 of an engine 8, and a back-pressure sensor 64 is installed into the exhaust pipe 32 on the upstream side of the trap 36. An operation-condition stability judging means B judges from each output of the operation-condition sensors 61 and 62 if the operation conditions such as the opening degree of an accelerator is stable or not, and if the judgement is ''unstable'', the regeneration process of the trap 36 is not started even if the back-pressure exceeds a prescribed value obtained by a set back-pressure value calculating means A. If a regeneration judging means C judges that the back pressure exceeds a prescribed value when it is judged that the operation condition is stabilized, a regeneration signal is outputted into a burning means 42, and the regeneration of the trap 36 is executed.
Inventors:
INAGAKI TAKAFUMI
Application Number:
JP12194784A
Publication Date:
August 30, 1993
Filing Date:
June 15, 1984
Export Citation:
Assignee:
TOYOTA MOTOR CO LTD
International Classes:
F01N3/02; F01N3/023; F01N9/00; G01N7/00; F02B3/06; (IPC1-7): F01N3/02; F01N3/02
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