ENGINE CONTROLLING APPARATUS

• US 20120083988A1
• Filed: 03/24/2011
• Published: 04/05/2012
• Est. Priority Date: 10/01/2010
• Status: Active Grant

• Current Assignee: Mitsubishi Jidosha Kogyo Kabushiki Kaisha
• Original Assignee: Mitsubishi Jidosha Kogyo Kabushiki Kaisha
• Inventors: MIYATA, Toshiyuki, UEDA, Katsunori, TODA, Hitoshi, SHIBATA, Koji
• Granted Patent: US 8,571,780 B2
• Time in Patent Office: Days
• US Class Current: 701/99
• CPC Class Codes: F02D 11/105 characterised by the function converting demand to actuation, e.g. a map indicating relations between an accelerator pedal position and throttle valve opening or target engine torque
• CPC Class Codes: F02D 2200/1006 Engine torque losses, e.g. friction or pumping losses or losses caused by external loads of accessories
• CPC Class Codes: F02D 2200/101 Engine speed
• CPC Class Codes: F02D 2200/602 Pedal position
• CPC Class Codes: F02D 2250/18 Control of the engine output torque
• CPC Class Codes: F02D 41/1497 With detection of the mechanical response of the engine
• CPC Class Codes: F02P 5/1508 with particular means during idling
• CPC Class Codes: Y02T 10/40 Engine management systems

Abstract

An engine controlling apparatus includes an engine speed detection unit that detects an engine speed, and an acceleration operation amount detection unit that detects an acceleration operation amount inputted to an acceleration pedal.

The apparatus includes a first calculation unit that calculates an acceleration demand torque based on the engine speed and the acceleration operation amount, a second calculation unit that calculates an external demand torque demanded from an external controlling system, and a third calculation unit that calculates a first target torque and a second target torque based on the acceleration demand torque and the external demand torque.

The apparatus includes a fourth calculation unit that calculates a maximum torque which can be generated by the engine at an actual charging efficiency, and a control unit that controls an ignition timing of the engine based on the actual torque and the first target torque.

Claims

1. An engine controlling apparatus, comprising:

an engine speed detection unit that detects an engine speed of an engine mounted on a vehicle;

an acceleration operation amount detection unit that detects an acceleration operation amount inputted to an acceleration pedal of the vehicle;

a first calculation unit that calculates an acceleration demand torque based on the engine speed detected by said engine speed detection unit and the acceleration operation amount detected by said acceleration operation amount detection unit;

a second calculation unit that calculates an external demand torque demanded from an external controlling system;

a third calculation unit that calculates a first target torque for ignition timing control and a second target torque for intake air amount control based on the acceleration demand torque and the external demand torque;

a fourth calculation unit that calculates, as an actual torque, a maximum torque which can be generated by the engine at an actual charging efficiency; and

a control unit that controls an ignition timing of the engine based on the actual torque and the first target torque.

2. The engine controlling apparatus according to claim 1, wherein

said control unit controls the ignition timing of the engine based on a ratio between the first target torque calculated by said third calculation unit and the actual torque calculated by said fourth calculation unit.

3. The engine controlling apparatus according to claim 2, wherein

said control unit includes a storage unit that stores a correspondence relationship between the ratio between the first target torque and the actual torque and a retard amount of the ignition timing of the engine.

4. The engine controlling apparatus according to claim 3, wherein

said control unit further includes a second storage unit that stores a correspondence relationship among the ratio, the retard amount and the engine speed detected by said engine speed detection unit.

5. The engine controlling apparatus according to claim 1, further comprising:

an intake controlling unit that controls an amount of intake air to be introduced into the engine;

wherein

said first calculation unit carries out a first-order delay calculation taking a response delay of the intake into consideration for a value calculated based on the engine speed and the acceleration operation amount to calculate the acceleration demand torque.

6. The engine controlling apparatus according to claim 1, further comprising:

an intake air amount detection unit that detects an amount of intake air to be introduced into the engine; and

an actual charging efficiency calculation unit that calculates the actual charging efficiency based on the intake air amount detected by said intake air amount detection unit.