Title:
A fire-by-negligence determining device of an internal-combustion engine
Document Type and Number:
Japanese Patent JP6164432
Kind Code:
B2
Abstract:
A misfire determination apparatus includes a rotation variation amount acquisition unit that obtains a rotation variation amount (ΔNE), which is a difference between a first angular velocity variation amount (Δω1) obtained during an expansion stroke of an arbitrary cylinder of a multi-cylinder internal combustion engine and a second angular velocity variation amount (Δω2) having been obtained in relation to a cylinder that has reached the expansion stroke N (where N is a positive integer) revolutions of a crankshaft before the arbitrary cylinder reaches the expansion stroke, and a misfire determination unit that, when the obtained rotation variation amount (ΔNE) exceeds a predetermined threshold (ΔNEth), determines that a misfire has not occurred in the internal combustion engine when a predetermined condition is established, and determines that a misfire has occurred in the internal combustion engine when the predetermined condition is not established.
Inventors:
Junji Hyodo
Application Number:
JP2015098954A
Publication Date:
July 19, 2017
Filing Date:
May 14, 2015
Export Citation:
Assignee:
TOYOTA JIDOSHA KABUSHIKI KAISHA
International Classes:
F02D45/00
Domestic Patent References:
| JP200247996A | ||||
| JP7145752A | ||||
| JP2009293501A |
Attorney, Agent or Firm:
Patent business corporation Prospec patent office