Control device for internal combustion engine and method of controlling internal combustion engine

Patent metadata

Field	Value
Publication number	US-10024245-B2
Application number	US-201615351906-A
Country	US
Kind code	B2
Filing date	Nov 15, 2016
Priority date	Nov 18, 2015
Publication date	Jul 17, 2018
Grant date	Jul 17, 2018

Abstract

A control device for an internal combustion engine includes an ECU. The internal combustion engine includes an oil pump, a crankshaft, a camshaft, and a variable valve timing mechanism. The ECU is configured to: calculate a required engine torque, which is an engine torque requested by a driver, based on accelerator operation amount information; calculate a future target phase of the variable valve timing mechanism based on a rotational speed of the internal combustion engine and the required engine torque; calculate an anticipated deviation that is a difference between the future target phase and a current actual phase; and control a discharge amount of oil from the oil pump based on the anticipated deviation.

First claim

What is claimed is:

1. A control device for an internal combustion engine, the internal combustion engine including an oil pump, a crankshaft, a camshaft, and a variable valve timing mechanism,
the oil pump being configured to vary a discharge amount of oil, and
the variable valve timing mechanism being configured to vary a phase of the camshaft relative to the crankshaft using the oil supplied from the oil pump, such that a valve timing is varied,
the control device comprising:
an electronic control unit configured to:
calculate a required engine torque based on accelerator operation amount information;
calculate a future target phase of the variable valve timing mechanism based on a rotational speed of the internal combustion engine and the required engine torque;
calculate an anticipated deviation that is a difference between the future target phase and a current actual phase; and
control the discharge amount of oil from the oil pump based on the anticipated deviation.

2. The control device according to claim 1 , wherein the electronic control unit is configured to increase the discharge amount of oil as the anticipated deviation is greater.

3. The control device according to claim 1 , wherein
the electronic control unit is configured to:
calculate a current target phase based on the rotational speed and a load factor of the internal combustion engine;
calculate an actual deviation that is a difference between the current target phase and the current actual phase; and
control the discharge amount of oil from the oil pump based on the greater of the anticipated deviation and the actual deviation.

4. A method of controlling an internal combustion engine controlled by an electronic control unit, the internal combustion engine including an oil pump, a crankshaft, a camshaft, and a variable valve timing mechanism,
the oil pump being configured to vary a discharge amount of oil, and
the variable valve timing mechanism being configured to vary a phase of the camshaft relative to the crankshaft using the oil supplied from the oil pump, such that a valve timing is varied,
the method comprising:
calculating, by the electronic control unit, a required engine torque based on accelerator operation amount information;
calculating, by the electronic control unit, a future target phase of the variable valve timing mechanism based on a rotational speed of the internal combustion engine and the required engine torque;
calculating, by the electronic control unit, an anticipated deviation that is a difference between the future target phase and a current actual phase; and
controlling, by the electronic control unit, the discharge amount of oil from the oil pump based on the anticipated deviation.

Assignees

• Toyota Motor Co Ltd
• Aisin Seiki

Inventors

• Takagi Noboru
• Uchiyama Yoshinobu
• Kaneko Masaaki

Classifications

• F01L2820/042

  Crankshafts position · CPC title

• F01M1/16

  Controlling lubricant pressure or quantity (rendering machines or engines inoperative or idling on lubricant pressure failure F01M1/22) · CPC title

• F01L1/3442 Primary

  using hydraulic chambers with variable volume to transmit the rotating force · CPC title

• F01L2001/3443

  Solenoid driven oil control valves · CPC title

• F01L2820/041

  Camshafts position or phase sensors · CPC title