CONTROL DEVICE FOR ENGINE

• US 20170089281A1
• Filed: 09/20/2016
• Published: 03/30/2017
• Est. Priority Date: 09/30/2015
• Status: Active Grant

• Current Assignee: Mazda Motor Corporation
• Original Assignee: Mazda Motor Corporation
• Inventors: Ujihara, Kenko, Shiiba, Hiroaki, Kan, Toshiya
• Granted Patent: US 10,598,110 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: B60W 30/045 Improving turning performance
• CPC Class Codes: F02D 2041/001 for engines with variable valve actuation
• CPC Class Codes: F02D 2041/0022 for diesel engines by throttle control
• CPC Class Codes: F02D 2200/501 Vehicle speed
• CPC Class Codes: F02D 2200/60 said parameters being related to the driver demands or status
• CPC Class Codes: F02D 2200/602 Pedal position
• CPC Class Codes: F02D 2250/18 Control of the engine output torque
• CPC Class Codes: F02D 37/02 one of the functions being ignition
• CPC Class Codes: F02D 41/0002 Controlling intake air
• CPC Class Codes: F02D 41/021 Introducing corrections for particular conditions exterior to the engine conjoint control of vehicle sub-units for propelling the vehicle B60W30/18
• CPC Class Codes: F02D 41/10 for acceleration
• CPC Class Codes: F02D 41/107 and deceleration
• CPC Class Codes: F02D 41/26 using computer, e.g. microprocessor
• CPC Class Codes: F02D 41/3005 Details not otherwise provided for
• CPC Class Codes: F02D 41/38 of the high pressure type

Abstract

A control device for controlling an engine based on an operating state of a vehicle is provided. The control device includes a processor configured to execute a basic target torque determining module for determining a basic target torque based on an operating state of the vehicle, a torque reduction amount determining module for determining a torque reduction amount based on a part of the operating state of the vehicle, a final target torque determining module for determining a final target torque based on the basic target torque and the torque reduction amount, an engine controlling module for controlling the engine to output the final target torque, and a torque change smoothing module for smoothing a chronological change of the final target torque corresponding to the torque reduction amount at a smaller smoothing degree than that of the chronological change of the final target torque corresponding to the basic target torque.

Claims

1. A control device for controlling an engine based on an operating state of a vehicle, comprising a processor configured to execute:

a basic target torque determining module for determining a basic target torque based on an operating state of the vehicle including an operation of an accelerator pedal;

a torque reduction amount determining module for determining a torque reduction amount based on a part of the operating state of the vehicle, the part of the operating state excluding the operation of the accelerator pedal;

a final target torque determining module for determining a final target torque based on the basic target torque and the torque reduction amount;

an engine controlling module for controlling the engine to output the final target torque; and

a torque change smoothing module for smoothing a chronological change of the final target torque corresponding to the torque reduction amount at a smaller smoothing degree than a smoothing degree of the chronological change of the final target torque corresponding to the basic target torque.

2. The control device of claim 1, wherein the torque change smoothing module does not smooth the chronological change of the final target torque corresponding to the torque reduction amount.

3. The control device of claim 1, wherein the torque reduction amount determining module determines the torque reduction amount according to a steering operation of the vehicle.

4. The control device of claim 3, wherein the torque reduction amount determining module determines the torque reduction amount to be increased while an increase rate thereof becomes lower, as a steering speed of the vehicle increases.

5. The control device of claim 1, wherein the basic target torque determining module determines a target acceleration of the vehicle based on the operating state of the vehicle including the operation of the accelerator pedal, and determines the basic target torque based on the target acceleration.

6. The control device of claim 1, wherein the engine is a diesel engine including a fuel injector for injecting fuel into a cylinder, and

wherein the engine controlling module controls a fuel injection amount of the fuel injector so as to cause the diesel engine to output the final target torque.

7. The control device of claim 1, wherein the engine is a gasoline engine including an air amount controlling mechanism for controlling an amount of air introduced into a cylinder, and an ignitor for igniting mixture gas within the cylinder,

wherein the air amount controlling mechanism is a throttle valve actuator or a variable valve mechanism, and

wherein the engine controlling module controls at least one of the air amount by the air amount controlling mechanism and an ignition timing by the ignitor, so as to cause the gasoline engine to output the final target torque.