Control apparatus and control system

Patent metadata

Field	Value
Publication number	US-10344852-B2
Application number	US-201815877581-A
Country	US
Kind code	B2
Filing date	Jan 23, 2018
Priority date	Jan 31, 2017
Publication date	Jul 9, 2019
Grant date	Jul 9, 2019

Abstract

A control apparatus configured to control an automatic transmission to which a driving force of an engine is input includes a detection unit provided in the automatic transmission, and a processing unit configured to generate load information concerning a load on the automatic transmission based on the detection result of the detection unit and transmit the load information to the control apparatus of the engine. The processing unit transmits dummy information that is not based on the detection result of the detection unit as the load information at least on condition that the automatic transmission is in an operation state in which a load on an input shaft is released.

First claim

What is claimed is:

1. A control apparatus configured to control an automatic transmission to which a driving force of an engine is input, comprising:
a detection unit provided in the automatic transmission; and
a processing unit configured to generate load information concerning a load on the automatic transmission based on a detection result of the detection unit and transmit the load information to a control apparatus of the engine,
wherein the processing unit transmits dummy information that is not based on the detection result of the detection unit as the load information at least on condition that the automatic transmission is in an operation state in which a load on an input shaft of the automatic transmission is released.

2. The apparatus according to claim 1 , wherein the automatic transmission can select, as shift ranges, a running range in which the driving force is transmitted to a wheel side and a non-running range in which the driving force is not transmitted to the wheel side, and
the operation state is a state in which the shift range of the automatic transmission is the non-running range.

3. The apparatus according to claim 1 , wherein the dummy information is information that does not increase an output torque of the engine.

4. The apparatus according to claim 1 , wherein the dummy information is information transmitted as the load information at previous time of transmission.

5. The apparatus according to claim 3 , wherein
in a case in which the output torque of the engine is increased by the load information, the processing unit transmits the dummy information as the load information, and
in a case in which the output torque of the engine is decreased by the load information, the processing unit transmits the load information based on the detection result.

6. The apparatus according to claim 1 , wherein
the automatic transmission is an automatic transmission provided with a torque converter, and
the load information is information concerning a load on the torque converter.

7. The apparatus according to claim 6 , wherein
the detection unit detects a rotation speed of the input shaft to which the driving force is input through the torque converter,
the processing unit transmits the dummy information as the load information on condition that a slip ratio of the torque converter decreases, and
in a case in which the slip ratio of the torque converter increases, the processing unit transmits the load information based on the detection result even if the automatic transmission is under the operation state in which the load on the input shaft is released.

8. The apparatus according to claim 7 , wherein the processing unit calculates, as the load information, a load value based on the rotation speed of the input shaft, an actual engine speed of the engine, and a target engine speed of the engine.

9. The apparatus according to claim 7 , further comprising a low-pass filter configured to extract a low frequency component from the detection result of the detection unit,
wherein the processing unit generates the load information based on the low frequency component extracted by the low-pass filter.

10. A control system comprising:
a first control apparatus configured to control an engine; and
a second control apparatus configured to control an automatic transmission to which a driving force of the engine is input,
wherein the second control apparatus comprises:
a detection unit provided in the automatic transmission; and
a processing unit configured to generate load information concerning a load on the automatic transmission based on a detection result of the detection unit and transmit the load information to the first control apparatus,
the first control apparatus executes driving control of the engine based on the load information, and
the processing unit transmits dummy information that is not based on the detection result of the detection unit as the load information at least on condition that the automatic transmission is in an operation state in which a load on an input shaft of the automatic transmission is released.

Assignees

• Honda Motor Co Ltd

Inventors

• Tachibanada Yuya
• Agata Masaya

Classifications

• F16H61/0213 Primary

  characterised by the method for generating shift signals · CPC title

• F16H2061/0455

  during shifts involving three or more shift members, e.g. release of 3-4 clutch, 2-4 brake and apply of forward clutch C1 · CPC title

• F16H63/50

  Signals to an engine or motor · CPC title

• F02D2200/1004

  Estimation of the output torque · CPC title

• F16H61/04

  Smoothing ratio shift · CPC title