Title:
ENGINE LOW TEMPERATURE OXIDATION REACTION DETECTION METHOD AND CONTROL METHOD, ENGINE LOW TEMPERATURE OXIDATION REACTION DETECTION DEVICE AND CONTROL DEVICE
Document Type and Number:
Japanese Patent JP2019183770
Kind Code:
A
Abstract:
To perform a high-precision estimation about a reaction amount of low temperature oxidation reaction generated in an engine combustion chamber.SOLUTION: A difference between the maximum value and the minimum value of an estimated heat generation rate at a later stage of a compression stroke and during a period before ignition is calculated as a first estimated reaction amount, a difference between an estimated heat generation rate at a first crank angle set according to an engine speed and an estimated heat generation rate set according to the engine speed and at a second crank angle at a more delayed angle side than the first crank angle is calculated as a second estimated reaction amount. When the first estimated reaction amount is equal to or more than a predetermined reaction amount, a reaction amount of a low temperature oxidation reaction is estimated in reference to the first estimated reaction amount and in turn when the first estimated reaction amount is less than the predetermined reaction amount, a reaction amount of the low temperature oxidation reaction is estimated in reference to the second estimated reaction amount.SELECTED DRAWING: Figure 9
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Inventors:
HOKAZONO TORU
NAKAMOTO YOSHIHISA
MARUMOTO MASAHARU
NAKAMOTO YOSHIHISA
MARUMOTO MASAHARU
Application Number:
JP2018077009A
Publication Date:
October 24, 2019
Filing Date:
April 12, 2018
Export Citation:
Assignee:
MAZDA MOTOR
International Classes:
F02D45/00; F02P5/152
Attorney, Agent or Firm:
Maeda patent office