Control system of vehicle

Patent metadata

Field	Value
Publication number	US-11519349-B2
Application number	US-202217567774-A
Country	US
Kind code	B2
Filing date	Jan 3, 2022
Priority date	Jan 8, 2021
Publication date	Dec 6, 2022
Grant date	Dec 6, 2022

Abstract

A control system includes a first control device and a second control device. The second control device transmits, to the first control device, a resonance influence torque or a first motor rotation angle speed, and information acquisition timing, which is an acquisition timing of the first motor rotation angle speed. The first control device calculates an engine inertia torque based on an engine rotation angle speed. The first control device selects the resonance influence torque based on the first motor rotation angle speed acquired at a predetermined derivation timing, based on the received information acquisition timing, and derives, as an engine torque, a sum of the resonance influence torque and the engine inertia torque, calculated based on the engine rotation angle speed derived at the predetermined derivation timing.

First claim

What is claimed is:

1. A control system of a vehicle, the control system comprising:
an engine mounted on the vehicle;
a damper connected to a crankshaft of the engine;
a power transfer device having an input shaft that is connected to the damper and a rotating body that rotates in synchronization with the input shaft;
a first sensor configured to detect a rotation angle of the crankshaft;
a second sensor configured to detect a rotation angle of the input shaft or the rotating body;
a first control device configured to receive a detection signal of the first sensor as an input; and
a second control device configured to receive a detection signal of the second sensor as an input and to communicate with the first control device, wherein:
the second control device is configured to execute:
a transfer device side rotation angle speed acquisition process for acquiring, based on the detection signal of the second sensor, a rotation angle speed of the input shaft or the rotating body as a transfer device side rotation angle speed; and
a transmission process for transmitting, to the first control device, a resonance influence torque or the transfer device side rotation angle speed, and an information acquisition timing, which is an acquisition timing of the transfer device side rotation angle speed, the resonance influence torque being torque caused by a resonance occurring in the power transfer device and calculated based on the transfer device side rotation angle speed;
the first control device is configured to execute:
a rotation angle speed derivation process for deriving, based on the detection signal of the first sensor, a rotation angle speed of the crankshaft as an engine rotation angle speed;
an inertia torque calculation process for calculating an engine inertia torque based on the engine rotation angle speed; and
an engine torque calculation process for calculating a sum of the resonance influence torque and the engine inertia torque as an engine torque, which is an output torque of the engine; and
the first control device is configured to, in the engine torque calculation process:
select the resonance influence torque based on the transfer device side rotation angle speed, which is acquired at a predetermined derivation timing, based on the information acquisition timing received from the second control device; and
calculate, as the engine torque, the sum of the resonance influence torque and the engine inertia torque which is calculated based on the engine rotation angle speed derived at the derivation timing.

2. The control system according to claim 1 , wherein:
the engine is a spark ignition-kind engine; and
the first control device is configured to, when an ignition timing of the engine is advanced, execute a derivation timing adjustment process for bringing forward the derivation timing.

3. The control system according to claim 1 , wherein:
the second control device is configured to:
execute a resonance influence torque calculation process for calculating, based on the transfer device side rotation angle speed, the resonance influence torque; and
transmit, in the transmission process, to the first control device, the resonance influence torque and the information acquisition timing, which is the acquisition timing of the transfer device side rotation angle speed used for calculating the resonance influence torque.

4. The control system according to claim 1 , wherein:
the power transfer device has a motor generator;
a rotor of the motor generator is the rotating body that rotates in synchronization with the input shaft;
the second sensor is configured to detect a rotation angle of the rotating body;
the second control device is configured to acquire, in the transfer device side rotation angle speed acquisition process, the rotation angle speed of the rotating body as the transfer device side rotation angle speed and transmit, in the transmission process, to the first control device, a motor torque, which is an output torque of the motor generator, the rotation angle speed of the rotating body, the rotation angle speed of the input shaft, and the information acquisition timing, which is an acquisition timing of the rotation angle speed of the rotating body; and
the first control device is configured to execute the resonance influence torque calculation process for calculating the resonance influence torque based on the motor torque, the rotation angle speed of the rotating body, and the rotation angle speed of the input shaft received from the second control device.

5. The control system according to claim 4 , wherein the second control device is configured to execute a motor torque acquisition process for acquiring, as the motor torque, a calculated value of the output torque of the motor generator based on a motor current value, which is a value indicating current flowing through the motor generator.

Assignees

• Toyota Motor Co Ltd

Inventors

• Suzuki Takashi
• Kaneko Akihiro

Classifications

• B60W2710/0666

  Engine torque · CPC title

• B60W2510/0685

  Engine crank angle · CPC title

• B60W40/00 Primary

  Estimation or calculation of {non-directly measurable} driving parameters for road vehicle drive control systems not related to the control of a particular sub unit, {e.g. by using mathematical models} · CPC title

• B60L2240/441

  Speed · CPC title

• F02D2200/1015

  Engines misfires · CPC title