Control apparatus and control method for internal combustion engine

• US 20090044611A1
• Filed: 09/12/2008
• Published: 02/19/2009
• Est. Priority Date: 05/27/2003
• Status: Abandoned Application

• Current Assignee: DENSO Corporation, Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: DENSO Corporation, Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Dohta, Hisayo, Fuwa, Naohide
• Application Number:
  US12/232,236
• Publication Number:
  US 20090044611A1
• Time in Patent Office: Days
• US Class Current: 73/114.330
• CPC Class Codes: F01L 13/0015 for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
• CPC Class Codes: F01L 2009/2126 Arrangements for amplifying the armature stroke
• CPC Class Codes: F01L 2800/00 Methods of operation using a variable valve timing mechanism
• CPC Class Codes: F01L 3/00 Lift-valve, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces; Parts or accessories thereof
• CPC Class Codes: F01L 9/20 by electric means
• CPC Class Codes: F02D 2041/001 for engines with variable valve actuation
• CPC Class Codes: F02D 41/0002 Controlling intake air
• CPC Class Codes: F02D 41/0055 Special engine operating conditions, e.g. for regeneration of exhaust gas treatment apparatus
• CPC Class Codes: F02D 41/182 for the control of a fuel injection device
• CPC Class Codes: F02D 41/2422 Selective use of one or more tables
• CPC Class Codes: F02D 41/2464 Characteristics of actuators

Abstract

A control apparatus for an internal combustion engine provided with a fuel supply mechanism capable of adjusting a fuel supply amount includes a flow rate sensor that detects an intake air flow rate that represents a flow rate of air admitted into a combustion chamber of the internal combustion engine, a pressure sensor that detects a pressure of the air admitted into the combustion chamber of the internal combustion engine, a characteristic change estimation unit that estimates a characteristic change of the internal combustion engine in accordance with the intake air flow rate detected by the flow rate sensor and the intake air pressure detected by the pressure sensor, and a fuel supply mechanism control unit that controls the fuel supply mechanism. The fuel supply mechanism control unit controls the fuel supply mechanism such that the characteristic change in the internal combustion engine is compensated in accordance with an estimation performed by the characteristic change estimation unit.

Claims

1. A measurement apparatus that measures an amount of air charged in a cylinder as an amount of air admitted into a combustion chamber of an internal combustion engine, the measurement apparatus comprising:

a characteristic change estimation unit that estimates a characteristic change in the internal combustion engine in accordance with a predetermined condition the intake air flow rate detected by the flow rate sensor and the intake air pressure detected by the pressure sensor; and

an in-cylinder air charging amount calculation unit capable of correcting an amount of air charged in the cylinder so as to compensate the characteristic change in the internal combustion engine in accordance with an estimation performed by the characteristic change estimation unit.

2. A measurement method that measures an amount of air charged in a cylinder as an amount of air admitted into a combustion chamber of an internal combustion engine, the measurement method comprising the steps of:

estimating a characteristic change in the internal combustion engine in accordance with a predetermined condition the intake air flow rate and the intake air pressure; and

correcting an amount of air charged in the cylinder so as to compensate the characteristic change in the internal combustion engine in accordance with the estimation.