Control apparatus for vehicle, vehicle, and motor

Patent metadata

Field	Value
Publication number	US-9790871-B2
Application number	US-201214397497-A
Country	US
Kind code	B2
Filing date	Sep 19, 2012
Priority date	Sep 19, 2012
Publication date	Oct 17, 2017
Grant date	Oct 17, 2017

Abstract

A control apparatus of a vehicle obtains information indicating a relationship between an instruction value to be provided to an actuator in accordance with a driving condition of a vehicle and a torque capacity of a clutch. The control apparatus includes a table holding unit that stores a correction table to be applied under a condition when an output torque from the engine is increasing and a correction table to be applied under a condition when an output torque from the engine is decreasing, a gear change condition determining unit that determines under which condition a gear change is executed, and a correction table update unit that updates the correction table to be applied under the determined condition based on the information indicating a relationship between a target value and an actual value of the torque capacity generated at the inertia phase.

First claim

The invention claimed is:

1. A control apparatus configured to be mounted on a vehicle, the control apparatus including, on a path configured to transmit a torque output from an engine, a clutch of which a torque capacity changes in accordance with an operation of an actuator, and a dog clutch transmission mechanism mounted downstream of the clutch, the control apparatus being configured and programmed to execute rotation control to change a rotation speed of the engine during a gear change period by providing an instruction value to the actuator such that the torque capacity of the clutch becomes greater or smaller relative to the torque output from the engine, the control apparatus comprising:
a holding unit configured and programmed to store condition-specific information indicating a relationship between the torque capacity and the instruction value to be provided to the actuator, and to be applied under each of a plurality of driving conditions that lead to different torque capacities generated in the clutch despite a same instruction value is provided to the actuator, or a plurality of driving conditions that lead to different characteristics during a change of the rotation speed of the engine despite a same torque capacity is generated in the clutch;
a determining unit configured and programmed to determine under which driving condition among the plurality of driving conditions a gear change is executed;
a deciding unit configured and programmed to decide an instruction value to be provided to the actuator corresponding to a target value of the torque capacity based on the condition-specific information that is applied under the determined driving condition;
a control unit configured and programmed to change the rotation speed of the engine by providing the decided instruction value to the actuator; and
an update unit configured and programmed to update the condition-specific information that is applied under the determined driving condition based on information indicating a relationship between a target value and an actual value of the torque capacity that is generated during a period in which the rotation speed of the engine is changed.

2. The control apparatus according to claim 1 , wherein the holding unit is configured and programmed to store condition-specific information that is applied while the torque output from the engine is increasing and condition-specific information that is applied while the torque output from the engine is decreasing.

3. A control apparatus configured to be mounted on a vehicle, the control apparatus including, on paths configured to transmit a torque output from an engine, two clutches of which respective torque capacities change in accordance with operations of actuators, to respectively receive the torque output, and two dog clutch transmission mechanisms including a common output shaft and mounted downstream of the respective clutches, the control apparatus being configured and programmed to execute during a gear change period switching control to switch the paths to transmit the torque from one of the two clutches and two transmission mechanisms to another of the two clutches and two transmission mechanisms, and rotation control to change a rotation speed of the engine by providing an instruction value to the actuators such that the torque capacities of the two clutches become greater or smaller relative to the torque output from the engine, the control apparatus comprising:
a holding unit configured and programmed to store condition-specific information indicating a relationship between the torque capacity and the instruction value to be provided to the actuators, to be applied under each of four driving conditions that are determined based on whether the rotation speed of the engine increases or decreases during the gear change, and whether the switching control is executed before or after the rotation control in the gear change;
a determining unit configured and programmed to determine under which driving condition among the four driving conditions the gear change is executed;
a deciding unit configured and programmed to decide an instruction value to be provided to the actuators corresponding to a target value of the torque capacity based on the condition-specific information that is applied under the determined driving condition;
a control unit configured and programmed to change the rotation speed of the engine by providing the decided instruction value to the actuators; and
an update unit configured and programmed to update the condition-specific information that is applied under the determined driving condition based on information indicating a relationship between a target value and an actual value of the torque capacity that is generated during a period in which the rotation speed of the engine is changed.

4. The control apparatus according to claim 1 , wherein the update unit is configured and programmed to calculate a correction amount for the instruction value to be provided to the actuator corresponding to the target value of the torque capacity based on a ratio between an actual value and a target value of a duration of the period in which the rotation speed of the engine is changed.

5. The control apparatus according to claim 1 , wherein the update unit is configured and programmed to calculate the actual value of the torque capacity that is generated during the period in which the rotation speed of the engine is changed, and calculate a correction amount for the instruction value to be provided to the actuator corresponding to the target value of the torque capacity based on a ratio between the actual value and the target value of the torque capacity.

6. The control apparatus according to claim 1 , wherein the holding unit is configured and programmed to hold:
a base table showing a relationship between the torque capacity and a base value of the instruction value to be provided to the actuator; and
a plurality of correction tables showing a relationship, as the condition-specific information that is applied under each of the driving conditions, between the torque capacity and a correction value for the instruction value to be provided to the actuator.

7. The control apparatus according to claim 6 , wherein the base value of the instruction value to be provided to the actuator corresponding to the target value of the torque capacity is updated and applied for every update of the target value of the torque capacity during a period in which the rotation control is executed; and
a correction value of the instruction value to be provided to the actuator corresponding to the target value of the torque capacity is updated at a start of the rotation control, and is continuously applied during the period in which the rotation control is executed.

8. The control apparatus according to claim 1 , wherein the holding unit is configured and programmed to store displaced amount information indicating a relationship between the torque capacity and a value indicating a displaced amount of a pressure plate included in the clutch, and the update unit is configured and programmed to:
calculate the instruction value to be provided to the actuator corresponding to the target value of the torque capacity, based on the condition-specific information;
calculate a value indicating a displaced amount of the pressure plate corresponding to the actual value of the torque capacity based on the displaced amount information;
correct a function between the instruction value to be provided to the actuator and the value indicating the displaced amount of the pressure plate based on the calculated values, the function being determined based on the condition-specific information and the displaced amount information; and
update th

Assignees

• Yamaha Motor Co Ltd

Inventors

• Iizuka Shinya

Classifications

• F16H2061/0459

  using map for shift parameters, e.g. shift time, slip or pressure gradient, for performing controlled shift transition and adapting shift parameters by learning · CPC title

• F16H61/02

  characterised by the signals used · CPC title

• F16D2500/3068

  Speed change of rate of the engine · CPC title

• F16D2500/70454

  Engine speed · CPC title

• F02D41/022

  in relation with the clutch status · CPC title