Control device for engine

• US 10,202,039 B2
• Filed: 09/20/2016
• Issued: 02/12/2019
• 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
• Primary Examiner(s): Whittington, Jess
• Application Number:
  US15/271,132
• Publication Number:
  US 20170087986A1
• Time in Patent Office: 875 Days
• CPC Class Codes: B60K 28/16 responsive to, or preventing, skidding of wheels brake control systems for vehicle drive stability B60T8/1755; arrangements responsive to a speed condition for adjusting wheel braking force B60T8/32; control of vehicle driving stability otherwise than by controlling the propulsion unit only B60W30/02; preventing wheel slippage by reducing power in rail vehicles B61C15/00
• 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 2200/50 said parameters being related to the vehicle or its components
• CPC Class Codes: F02D 2200/501 Vehicle 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 41/0002 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 41/04 Introducing corrections for particular operating conditions F02D41/14 takes precedence
• CPC Class Codes: F02D 41/26 using computer, e.g. microprocessor
• CPC Class Codes: F02D 41/3827 for diesel engines
• CPC Class Codes: Y02T 10/40 Engine management systems

Abstract

A control device for controlling an engine based on a vehicle operating state is provided, which includes a steering angle detector for detecting a vehicle steering angle, and a processor configured to execute a basic target torque determining module for determining a basic target torque based on a vehicle operating state, a slip controller for acquiring the steering angle from the steering angle detector, detecting a slip state of wheels based on part of the vehicle operating state, and determining a torque control amount based on the slip state, a torque reduction amount determining module for acquiring the steering angle and determining a torque reduction amount based thereon, a final target torque determining module for determining a final target torque based on the basic target torque, the torque reduction amount, and the torque control amount, and an engine controlling module for controlling the engine to output the final target torque.

Claims

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

a steering angle detector for detecting a steering angle of a steering wheel;

a slip controller for acquiring the steering angle from the steering angle detector, detecting a slip state of wheels of the vehicle based on a part of the operating state of the vehicle including the acquired steering angle, and determining a torque control amount based on the detected slip state;

a power train controller provided with a basic target torque determining module, a torque reduction amount determining module, a final target torque determining module, and an engine controlling module; and

a processor of the power train controller configured to execute;

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

the torque reduction amount determining module for determining a torque reduction amount based on a steering speed calculated from the acquired steering angle obtained by the steering angle detector, the torque reduction amount determined when the steering speed exceeds a predetermined threshold;

the final target torque determining module for determining a final target torque based on the basic target torque, the torque reduction amount, and the torque control amount obtained by the slip controller; and

the engine controlling module for controlling the engine to output the final target torque.

2. The control device of claim 1, further comprising a controller area network (CAN) for communicably connecting the steering angle detector and the torque reduction amount determining module,

wherein the steering angle detector transmits a detection signal indicating the steering angle to the CAN at a given transmission cycle, and

wherein the torque reduction amount determining module receives from the CAN the detection signal indicating the steering angle at a reception cycle shorter than the transmission cycle, and determines the torque reduction amount based on the received detection signal indicating the steering angle.

3. The control device of claim 2, wherein the reception cycle is obtained by dividing the transmission cycle by an integer.

4. The control device of claim 2, wherein the torque reduction amount determining module determines the torque reduction amount to be increased while a rate of increase of the torque reduction amount becomes less, as the 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.