Display of a meter during an upshift

Patent metadata

Field	Value
Publication number	US-10175143-B2
Application number	US-201715450301-A
Country	US
Kind code	B2
Filing date	Mar 6, 2017
Priority date	Mar 18, 2016
Publication date	Jan 8, 2019
Grant date	Jan 8, 2019

Abstract

A target reaching rotational speed set during a torque phase is set to a value higher than an actual engine rotational speed, the value being higher as one of a vehicle acceleration and an engine rotational speed gradient is larger. That is, as the acceleration is steeper, the target reaching rotational speed is set to a value closer to an upper limit rotational speed or rotational speeds proximate thereto. Thus, a display rotational speed displayed on a tachometer at the end of the torque phase becomes high rotational speed. Accordingly, there is provided a display control device for a vehicle that enables a driver to feel the use of engine performance to the limit.

First claim

What is claimed is:

1. A display control device for a vehicle including an engine and an automatic transmission, the display control device being configured to display engine rotational speed of the engine on a meter, the display control device comprising:
an electronic control unit configured to:
(i) set a maximum display rotational speed to be displayed on the meter at an end of a torque phase of an upshift of the automatic transmission when a start condition of the upshift is satisfied,
(ii) set the maximum display rotational speed to a value higher than actual engine rotational speed,
(iii) make the maximum display rotational speed higher as at least one of vehicle acceleration and engine rotational speed gradient is larger at a time when the start condition of the upshift is satisfied,
(iv) calculate the display rotational speed such that the display rotational speed displayed on the meter at the end of the torque phase becomes the maximum display rotational speed, and
(v) display the calculated display rotational speed on the meter.

2. The display control device according to claim 1 , wherein
the electronic control unit is configured to calculate the display rotational speed based on the actual engine rotational speed without setting the maximum display rotational speed when at least one of accelerator opening, throttle opening, the vehicle acceleration, and the engine rotational speed gradient is equal to or less than a specified value.

3. The display control device according to claim 1 , wherein
the electronic control unit is configured to:
(i) calculate the display rotational speed by applying smoothing with the maximum display rotational speed as a target rotational speed, and
(ii) make a smoothing amount representing a smoothing degree smaller as at least one of the vehicle acceleration and the engine rotational speed gradient is larger.

4. The display control device according to claim 1 , wherein
the electronic control unit is configured to:
(i) calculate the maximum display rotational speed by subtracting a specified value from a preset upper limit rotational speed, and
(ii) set the specified value smaller as at least one of the vehicle acceleration and the engine rotational speed gradient is larger at a time when the start condition of the upshift is satisfied.

Assignees

• Toyota Motor Co Ltd

Inventors

• Teratani Yoshiyuki

Classifications

• G01P1/10

  for indicating predetermined speeds · CPC title

• F02D31/009

  for maximum speed control · CPC title

• F16H59/00

  Control inputs to {control units of} change-speed- or reversing-gearings for conveying rotary motion · CPC title

• G01P1/08

  Arrangements of scales, pointers, lamps or acoustic indicators, e.g. in automobile speedometers · CPC title

• G01M15/046 Primary

  by monitoring revolutions (for detecting misfire G01M15/11) · CPC title