ENGINE CONTROL DEVICE

• US 20170145940A1
• Filed: 10/28/2016
• Published: 05/25/2017
• Est. Priority Date: 11/20/2015
• Status: Active Grant

• Current Assignee: Mazda Motor Corporation
• Original Assignee: Mazda Motor Corporation
• Inventors: Ogawa, Daisaku, Ohisa, Chikako, Ito, Takeatsu, Sunahara, Osamu, Umetsu, Daisuke, Kawamura, Takahiro, Takahara, Yasunori
• Granted Patent: US 10,221,778 B2
• Time in Patent Office: Days
• CPC Class Codes: B60W 30/16 Control of distance between vehicles, e.g. keeping a distance to preceding vehicle
• 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 2200/501 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 2250/26 by applying a torque limit
• CPC Class Codes: F02D 37/02 one of the functions being ignition
• 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

Abstract

An engine control device for controlling an engine based on a vehicle operating state is provided, that includes a basic target torque determinator for setting a vehicle target acceleration based on an accelerator pedal operation and determining a basic target engine torque based on the vehicle target acceleration, a torque reduction demand determinator for determining whether an engine torque reduction is demanded based on the vehicle operating state other than the accelerator pedal operation, a torque reduction amount determinator for determining an engine torque reduction amount according to the operating state when the torque reduction is demanded, a final target torque determinator for determining as a final target torque an engine torque calculated by subtracting the torque reduction amount from the basic target torque when the torque reduction is demanded, and an engine controller for controlling the engine so as to output the final target torque.

Claims

1. An engine control device for controlling an engine based on an operating state of a vehicle, comprising:

a basic target torque determinator for setting a target acceleration of the vehicle based on an accelerator pedal operation and determining a basic target engine torque based on the target acceleration of the vehicle;

a torque reduction demand determinator for determining an existence of a demand to reduce an engine torque based on the operating state of the vehicle other than the accelerator pedal operation;

a torque reduction amount determinator for determining an engine torque reduction amount according to the operating state when the torque reduction demand is determined to exist;

a final target torque determinator for determining as a final target torque an engine torque calculated by subtracting the torque reduction amount from the basic target torque when the torque reduction demand is determined to exist; and

an engine controller for controlling the engine so as to output the final target torque.

2. The engine control device of claim 1, further comprising a following travel control device for controlling a traveling speed of the vehicle in order to follow a preceding vehicle,

wherein when the torque reduction demand is determined to exist, even during the following control, the final target torque determinator determines as the final target torque the engine torque calculated by subtracting the torque reduction amount from the basic target torque for the following control.

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

4. The engine control device of claim 2, wherein the torque reduction amount determinator determines the torque reduction amount according to a steering operation of the vehicle.

5. An engine control device for controlling an engine based on an operating state of a vehicle, comprising:

a basic target torque determinator for setting a target acceleration of the vehicle based on an accelerator pedal operation and determining a basic target engine torque based on the target acceleration of the vehicle;

a change rate acquirer for acquiring a rate of change of a steering operation of the vehicle;

a target additional deceleration setter for increasing a target additional deceleration while a rate of the increase becomes less as the change rate increases;

a torque reduction amount determinator for determining an engine torque reduction amount according to the target additional deceleration when the torque reduction demand is determined to exist;

a final target torque determinator for determining as a final target torque an engine torque calculated by subtracting the torque reduction amount from the basic target torque when the torque reduction demand is determined to exist; and

an engine controller for controlling the engine so as to output the final target torque.