US 10,053,003 B2Granted

Display control device for meter

AssigneeToyota Jidosha Kabushiki Kaisha

InventorsYoshiyuki Teratani, Osamu Kanai, Yuki Murakami

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Abstract

When an automatic transmission shift start condition is satisfied, an electronic control unit calculates a meter target rotational speed of an engine by adding a correction amount corresponding to the state of a torque converter to a turbine rotational speed corresponding to a post-shift gear stage, and makes a meter display rotational speed follow after the meter target rotational speed, fixes the correction amount to a value obtained at the time of shift start determination, when immobilization conditions including that the shift start condition for a downshift is satisfied and that the engine is driven are satisfied. When actual rotational speed display conditions are satisfied, it can be predicted that differences between an engine rotational speed and a turbine rotational speed before and after shifting are large, and so the electronic control unit sets a current engine rotational speed as the meter target rotational speed or ends the control.

Claims14

Dependent claims

A display control device for a meter, the meter being provided in a vehicle including a torque converter and an automatic transmission and being configured to display rotational speed of an engine, the display control device comprising:

an electronic control unit configured to:
(i) when a shift start condition of the automatic transmission is satisfied, add a correction amount corresponding to a state of the torque converter to a turbine rotational speed of the torque converter corresponding to a post-shift gear stage so as to
(a) calculate an estimated rotational speed of the engine,
(b) set the estimated rotational speed as a meter target rotational speed, and
(c) approximate a display rotational speed displayed on the meter to the meter target rotational speed;
(ii) fix the correction amount to a value obtained at a time of shift start determination, when immobilization conditions are satisfied, the immobilization conditions including that the shift start condition for the automatic transmission to perform a downshift is satisfied, and that the engine is driven from a side of the torque converter;
and
(iii) set as the meter target rotational speed a current engine rotational speed in place of the estimated rotational speed, when actual rotational speed display conditions are satisfied, the actual rotational speed display conditions including (a) that the shift start condition for the automatic transmission to perform the downshift is satisfied, (b) that the engine is driven from the side of the torque converter, and (c) that change in a difference between an engine rotational speed and the turbine rotational speed of the torque converter before and after shifting is determined to be large.

5 more elements

A display control device for a meter, the meter being provided in a vehicle including a torque converter and an automatic transmission and configured to display rotational speed of an engine, the display control device comprising:

an electronic control unit configured to:
(i) when a shift start condition of the automatic transmission is satisfied, add a correction amount corresponding to a state of the torque converter to a turbine rotational speed of the torque converter corresponding to a post-shift gear stage so as to
(a) calculate an estimated rotational speed of the engine,
(b) set the estimated rotational speed as a meter target rotational speed, and
(c) approximate a display rotational speed displayed on the meter to the meter target rotational speed;
(ii) fix the correction amount to a value obtained at a time of shift start determination, when immobilization conditions are satisfied, the immobilization conditions including that the shift start condition for a downshift is satisfied, and that the engine is driven from a side of the torque converter;
and
(iii) end a series of control including calculation of the estimated rotational speed, when actual rotational speed display conditions are satisfied, the actual rotational speed display conditions including (a) that the shift start condition for the automatic transmission to perform the downshift is satisfied, (b) that the engine is driven from the side of the torque converter, and (c) that change in a difference between an engine rotational speed and the turbine rotational speed of the torque converter before and after shifting is determined to be large.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application: 15/606,969Filed 26 May 2017
Priority: JP 2016-10567626 May 2016
Published: US 2017/0341570 A130 Nov 2017
Granted: 21 Aug 2018
Term ends: Not estimatedThe source records don’t support an estimate.

Classification17 codes

G01P 1/08
Indicating devices, e.g. for remote indication: arrangements of scales, pointers, lamps or acoustic indicators, e.g. in automobile speedometers
B60K 35/22
Using visual output, e.g. blinking lights or matrix displays: display screens
B60K 35/80
Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles: arrangements for controlling instruments
B60Q 1/447
Controlled by inertial devices: with indication of the braking strength or speed changes, e.g. by changing the shape or intensity of the indication