REVERSE SPEED CONTROL APPARATUS

• US 20120322617A1
• Filed: 06/20/2012
• Published: 12/20/2012
• Est. Priority Date: 06/20/2011
• Status: Abandoned Application

• Current Assignee: DENSO Corporation
• Original Assignee: DENSO Corporation
• Inventors: Tsujimura, Tomohiro, Takahashi, Akihiro
• Application Number:
  US13/527,999
• Publication Number:
  US 20120322617A1
• Time in Patent Office: Days
• US Class Current: 477/96
• CPC Class Codes: B60W 30/18036 Reversing
• CPC Class Codes: F16H 2061/0485 during range shift from neutral (N) to reverse (R)
• CPC Class Codes: F16H 2061/165 Preventing reverse gear shifts if vehicle speed is too high for safe shifting
• CPC Class Codes: F16H 59/44 dependent on machine speed of the machine, e.g. the vehicle
• CPC Class Codes: F16H 59/54 dependent on signals from the brakes, e.g. parking brakes
• CPC Class Codes: F16H 61/04 Smoothing ratio shift

Abstract

A reverse speed control apparatus for controlling a reverse speed of the vehicle may include a brake operation detection unit, a shift range detection unit, and a reverse speed restriction unit. The brake operation detection unit detects a brake operation and a brake release of brakes disposed in the vehicle, and the shift range detection unit detects a shift range of the vehicle. Based on the brake operation detection unit and the shift range detection unit, the reverse speed restriction unit performs a restriction on a reverse speed of the vehicle in accordance with a restriction speed threshold. Specifically, when a brake operation is detected and the shift range of the vehicle is in a reverse range, the reverse speed restriction unit performs the restriction on the reverse speed of the vehicle for a preset period of time when a brake release is detected.

Claims

1. A reverse speed control apparatus disposed in a vehicle, the apparatus comprising:

a brake operation detection unit detecting a brake operation and a brake release of a brake disposed in the vehicle;

a shift range detection unit detecting a shift range of the vehicle; and

a reverse speed restriction unit performing a restriction on a reverse speed of the vehicle in accordance with a restriction speed threshold, wherein

when the brake operation detection unit detects a brake operation and the shift range detection unit detects shift range of the vehicle in a reverse range, the reverse speed restriction unit performs the restriction on the reverse speed of the vehicle after a brake release is detected by the brake operation detection unit.

2. The reverse speed control apparatus of claim 1, wherein the reverse speed restriction unit releases the restriction on the reverse speed after a preset period of time.

3. The reverse speed control apparatus of claim 2, wherein the reverse speed restriction unit performs the restriction on the reverse speed for the preset period of time from a first brake release detected by the brake operation detection unit after the detection of the shift operation to the reverse range by the shift range detection unit and the detection of a brake operation by the brake operation detection unit.

4. The reverse speed control apparatus of claim 2, wherein the reverse speed restriction unit performs the restriction on the reverse speed for the preset period of time from a brake release detected by the brake operation detection unit for each brake operation detected by the brake operation detection unit after the detection of the shift operation to the reverse range by the shift range detection unit.

5. The reverse speed control apparatus of claim 4, wherein, when the shift operation is in the reverse range and the reverse speed of the vehicle is greater than or equal to the restriction speed threshold after the restriction on the reverse speed is no longer performed, the reverse speed restriction unit does not perform a restriction on the reverse speed when a brake release is detected after a brake operation.

6. The reverse speed control apparatus of claim 1, wherein the reverse speed restriction unit gradually increases a speed threshold of the vehicle after the release of the restriction on the reverse speed.

7. The reverse speed control apparatus of claim 1, wherein when a power source of the vehicle is an engine, the reverse speed restriction unit performs the restriction on the reverse speed as at least one of an operation control of a brake actuator, a shift control of an automatic transmission, and a slip control of a clutch, without restricting an output of the engine.

8. The reverse speed control apparatus of claim 1, wherein when a power source of the vehicle is a motor, the reverse speed restriction unit performs the restriction on the reverse speed as a control of a motor rotation speed.