Deceleration control device of vehicle

Patent metadata

Field	Value
Publication number	US-10677347-B2
Application number	US-201815989517-A
Country	US
Kind code	B2
Filing date	May 25, 2018
Priority date	Jun 29, 2017
Publication date	Jun 9, 2020
Grant date	Jun 9, 2020

Abstract

A shift lever is configured to take deceleration-requesting positions through its operation in a specified direction from an M-range position for a manual mode. A control is configured such that vehicle's deceleration is larger when an operational quantity of a one-time operation of the shift lever operated toward the deceleration-requesting positions B1, B2, B3 is larger. For example, when the shift lever is operated to the position B1, one-stage shift down is performed, when the shift lever is operated to the position B2, two-stage shift down is performed, and when the shift lever is operated to the position B3, three-stage shift down is performed.

First claim

What is claimed is:

1. A deceleration control device of a vehicle which changes deceleration of the vehicle by changing a drive state of a driving wheel, comprising:
a deceleration changing mechanism to change the deceleration of the vehicle;
a controller to control the deceleration changing mechanism;
a shift lever operable from a specified position to a deceleration-requesting position, the shift lever being configured such that an operable range of the shift lever for changing the deceleration of the vehicle is larger than an operable range for changing acceleration of the vehicle; and
an operational-quantity detector to detect an operational quantity of a one-time operation of the shift lever which is operated from the specified position toward the deceleration-requesting position,
wherein said controller is configured to control said deceleration changing mechanism such that the deceleration of the vehicle is larger when the operational quantity detected by said operational-quantity detector is larger.

2. The deceleration control device of the vehicle of claim 1 , wherein said deceleration changing mechanism is an automatic transmission which changes the drive state of the driving wheel, said controller is configured to control a gear ratio of said automatic transmission, and said gear ratio of the automatic transmission controlled by the controller is shifted down to a low-speed side such that the deceleration of the vehicle is larger when the operational quantity detected by said operational-quantity detector is larger.

3. The deceleration control device of the vehicle of claim 2 , wherein said automatic transmission is a stepped automatic transmission having plural shift stages, and said controller is configured to control said automatic transmission such that the number of stage of speed change to shift down by the automatic transmission is more when the operational quantity detected by said operational-quantity detector is larger.

4. The deceleration control device of the vehicle of claim 3 , wherein the maximum of said number of stage of speed change to shift down which is controlled by said controller is two.

5. The deceleration control device of the vehicle of claim 3 , wherein the maximum of said number of stage of speed change to shift down which is controlled by said controller is three of more.

6. The deceleration control device of the vehicle of claim 1 , wherein said deceleration changing mechanism is a generator which is driven by an engine of the vehicle and capable of generating power for regeneration, said controller is configured to control a regenerative power-generation quantity generated by said generator, and said regenerative power-generation quantity of the generator controlled by the controller is increased such that the deceleration of the vehicle is larger when the operational quantity detected by said operational-quantity detector is larger.

7. The deceleration control device of the vehicle of claim 1 , wherein said deceleration changing mechanism comprises an automatic transmission which changes the drive state of the driving wheel and a generator which is driven by an engine of the vehicle and capable of generating power for regeneration, said controller is configured to concurrently control a gear ratio of said automatic transmission and a regenerative power-generation quantity generated by said generator, and said gear ratio of the automatic transmission controlled by the controller is shifted down to a low-speed side and said regenerative power-generation quantity of the generator controlled by the controller is increased such that the deceleration of the vehicle is larger when the operational quantity detected by said operational-quantity detector is larger.

8. The deceleration control device of the vehicle of claim 7 , further comprising:
a first determiner to determine target deceleration in accordance with the operational quantity detected by said operational-quantity detector; and
a second determiner to determine the number of stage of speed change to shift down controlled by the automatic transmission and the regenerative power-generation quantity generated by the generator such that the target deceleration determined by said first determiner is obtained,
wherein said controller is configured to perform the shift-down control of the automatic transmission by the number of stage of speed change to shift down determined by the second determiner and control the generator so as to generate the regenerative power-generation quantity determined by the second determiner.

9. The deceleration control device of the vehicle of claim 1 , further comprising a shift gate for guiding a move of said shift lever,
wherein said shift gate comprises a main gate portion where a parking range, a reverse range, a neutral range, and a drive range are arranged in series from one-end side of the shift gate toward the other-end side of the shift gate in order, a sub gate portion where a manual range and said deceleration-requesting position are arranged in series, and a connecting gate portion which interconnects a drive-range position of said main gate portion and a manual-range position of said sub gate portion, said main gate portion and said sub gate portion are arranged in parallel on right-and-left sides, and said deceleration-requesting position is configured to extend from the manual-range position toward a parking-range position.

10. The deceleration control device of the vehicle of claim 1 , wherein when said shift lever is operated toward said deceleration-requesting position, the shift lever is configured to be held at a current position as long as the shift lever is not operationally returned.

11. The deceleration control device of the vehicle of claim 1 , wherein said operational quantity detected by the operational-quantity detector includes a stroke of said shift lever.

Assignees

• Mazda Motor

Inventors

• Matsuoka Toshihiro
• Nakata Daiki
• Tokunaga Kouji
• Takenaga Yohsuke
• Tanaka Norimichi

Classifications

• F16H59/0204

  for automatic transmissions with means for range selection and manual shifting, e.g. range selector with tiptronic · CPC title

• F16H61/0213 Primary

  characterised by the method for generating shift signals · CPC title

• F16H2059/082

  for different transmission modes · CPC title

• B60Y2200/92

  Hybrid vehicles · CPC title

• F16H2061/0234

  Adapting the ratios to special vehicle conditions · CPC title