Vehicle control apparatus

Patent metadata

Field	Value
Publication number	US-10934989-B2
Application number	US-201916518237-A
Country	US
Kind code	B2
Filing date	Jul 22, 2019
Priority date	Sep 28, 2018
Publication date	Mar 2, 2021
Grant date	Mar 2, 2021

Abstract

A vehicle control apparatus includes input-side and output-side rotating elements, a fuel injection controller, and an ignition timing controller. The ignition timing controller controls ignition timing of an engine to first timing on the condition that the engine is controlled from a fuel cut state to a fuel injection state, and afterwards, changes the ignition timing to second timing on advance side of the first timing. The ignition timing controller changes the ignition timing toward the second timing at a first change rate until a rotational acceleration rate of the output-side rotating element reaches a threshold. After the rotational acceleration rate of the output-side rotating element reaches the threshold, the ignition timing controller changes the ignition timing toward the second timing at a second change rate greater than the first change rate.

First claim

The invention claimed is:

1. A vehicle control apparatus to be mounted on a vehicle, the vehicle including an engine, a shifting mechanism, one or more wheels, a first power transmission path between the engine and the shifting mechanism, and a second power transmission path between the shifting mechanism and the one or more wheels, the vehicle control apparatus comprising:
an input-side rotating element provided on the first power transmission path;
an output-side rotating element provided on the second power transmission path;
a fuel injection controller configured to control the engine from a fuel cut state to a fuel injection state on a condition that an accelerator pedal operation is made on decelerated travel of the vehicle; and
an ignition timing controller configured to control ignition timing of the engine to first timing on a condition that the engine is controlled from the fuel cut state to the fuel injection state, and afterwards, change the ignition timing to second timing on advance side of the first timing,
the ignition timing controller changing the ignition timing toward the second timing at a first change rate until a rotational acceleration rate of the output-side rotating element reaches a threshold, and
the ignition timing controller changing the ignition timing toward the second timing at a second change rate smaller than the first change rate, after the rotational acceleration rate of the output-side rotating element reaches the threshold.

2. The vehicle control apparatus according to claim 1 , wherein the threshold is set at zero.

3. The vehicle control apparatus according to claim 2 , wherein the first timing is set on retardation side of a top dead center.

4. The vehicle control apparatus according to claim 2 , wherein the second timing is set on the advance side of a top dead center.

5. The vehicle control apparatus according to claim 2 , further comprising:
a generator coupled to the engine;
a throttle valve provided in an intake system of the engine;
a power generation controller configured to control the generator to a power generation state on the decelerated travel of the vehicle; and
a throttle valve controller configured to control the throttle valve openwise on the decelerated travel of the vehicle.

6. The vehicle control apparatus according to claim 1 , wherein the threshold is set at a value that renders it detectable that the rotational acceleration rate of the output-side rotating element has made a transition from deceleration side to acceleration side.

7. The vehicle control apparatus according to claim 6 , wherein the first timing is set on retardation side of a top dead center.

8. The vehicle control apparatus according to claim 6 , wherein the second timing is set on the advance side of a top dead center.

9. The vehicle control apparatus according to claim 6 , further comprising:
a generator coupled to the engine;
a throttle valve provided in an intake system of the engine;
a power generation controller configured to control the generator to a power generation state on the decelerated travel of the vehicle; and
a throttle valve controller configured to control the throttle valve openwise on the decelerated travel of the vehicle.

10. The vehicle control apparatus according to claim 1 , wherein the first timing is set on retardation side of a top dead center.

11. The vehicle control apparatus according to claim 10 , wherein the second timing is set on the advance side of a top dead center.

12. The vehicle control apparatus according to claim 10 , further comprising:
a generator coupled to the engine;
a throttle valve provided in an intake system of the engine;
a power generation controller configured to control the generator to a power generation state on the decelerated travel of the vehicle; and
a throttle valve controller configured to control the throttle valve openwise on the decelerated travel of the vehicle.

13. The vehicle control apparatus according to claim 1 , wherein the second timing is set on the advance side of a top dead center.

14. The vehicle control apparatus according to claim 1 , further comprising:
a generator coupled to the engine;
a throttle valve provided in an intake system of the engine;
a power generation controller configured to control the generator to a power generation state on the decelerated travel of the vehicle; and
a throttle valve controller configured to control the throttle valve openwise on the decelerated travel of the vehicle.

15. A vehicle control apparatus to be mounted on a vehicle, the vehicle including an engine, a shifting mechanism, one or more wheels, a first power transmission path between the engine and the shifting mechanism, and a second power transmission path between the shifting mechanism and the one or more wheels, the vehicle control apparatus comprising:
an input-side rotating element provided on the first power transmission path;
an output-side rotating element provided on the second power transmission path; and
circuitry configured to
control the engine from a fuel cut state to a fuel injection state on a condition that an accelerator pedal operation is made on decelerated travel of the vehicle, and
control ignition timing of the engine to first timing on a condition that the engine is controlled from the fuel cut state to the fuel injection state, and afterwards, change the ignition timing to second timing on advance side of the first timing,

wherein the circuitry changes the ignition timing toward the second timing at a first change rate until a rotational acceleration rate of the output-side rotating element reaches a threshold, and
wherein the circuitry changes the ignition timing toward the second timing at a second change rate smaller than the first change rate, after the rotational acceleration rate of the output-side rotating element reaches the threshold.

Assignees

• Subaru Corp

Inventors

• Kinoshita Takahiro
• Shimizu Hirofumi

Classifications

• H02J2105/33

  exchanging power with road vehicles · CPC title

• H02J7/485

  with provisions for charging different types of batteries · CPC title

• B60K6/485

  Motor-assist type · CPC title

• F02D2250/21

  during a transition between engine operation modes or states · CPC title

• B60W10/107

  with endless flexible members · CPC title