CONTROL OF THE OPERATING MODE OF A MAIN DRIVE UNIT OF A VEHICLE IN DEPENDENCE ON BRAKE PEDAL ACTUATION

• US 20100175936A1
• Filed: 01/08/2010
• Published: 07/15/2010
• Est. Priority Date: 01/09/2009
• Status: Active Grant

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Schneider, Thomas
• Granted Patent: US 8,360,182 B2
• Time in Patent Office: Days
• US Class Current: 180/65.280
• CPC Class Codes: B60W 10/06 including control of combustion engines
• CPC Class Codes: B60W 10/18 including control of braking systems
• CPC Class Codes: B60W 10/184 with wheel brakes
• CPC Class Codes: B60W 20/00 Control systems specially adapted for hybrid vehicles hybrid vehicle design, B60K6/00; electric vehicles B60L
• CPC Class Codes: B60W 2540/12 Brake pedal position
• CPC Class Codes: B60W 30/18 Propelling the vehicle
• CPC Class Codes: B60W 30/18018 Start-stop drive, e.g. in a traffic jam
• CPC Class Codes: B60W 30/18136 Engine braking
• CPC Class Codes: F02N 11/0818 Conditions for starting or stopping the engine or for deactivating the idle-start-stop mode
• CPC Class Codes: F02N 2200/0801 Vehicle speed
• CPC Class Codes: F02N 2200/102 Brake pedal position
• CPC Class Codes: Y02T 10/40 Engine management systems
• CPC Class Codes: Y10S 903/905 Combustion engine

Abstract

A method for controlling the operating mode of a drive of a vehicle that includes a main drive unit and an auxiliary tractive energy source. The method includes operating the main drive unit, detecting the duration of actuation of an uninterrupted actuation of a brake pedal, and detecting whether the duration of actuation is above a minimum duration by comparing the duration of actuation with a minimum duration. The main drive unit is switched off if it has been detected that the duration of actuation is above the minimum duration. Otherwise, operation of the main drive unit is continued if it has been detected that the duration of actuation is not above the minimum duration. A device for carrying out the method is also described, which includes a timer for detecting the duration of actuation and a comparator for comparing the duration of actuation with a minimum duration.

Claims

1. A method for controlling an operating mode of a drive of a vehicle that includes a main drive unit and an auxiliary tractive energy source, the method comprising:

operating the main drive unit;

detecting a duration of actuation of an uninterrupted actuation of a brake pedal;

detecting whether the duration of actuation is above a minimum duration by comparing the duration of actuation with a minimum duration;

switching off the main drive unit if it has been detected that the duration of actuation is above the minimum duration; and

continuing operation of the main drive unit if it has been detected that the duration of actuation is not above the minimum duration.

2. The method as recited in claim 1, further comprising:

ascertaining a speed of the vehicle, wherein at low speeds, a lower minimum duration is provided than at high speeds.

3. The method as recited in claim 2, wherein at least one of:

i) the minimum duration reduces with decreasing speed, and ii) the minimum duration increases at least piecewise monotonically or strictly monotonically with the speed.

4. The method as recited in claim 2, wherein the minimum duration at a speed of substantially zero or at a speed below a predetermined minimum speed is substantially zero and the minimum duration at a speed that is at least as great as the minimum speed one of:

i) is constant, ii) increases monotonically with the speed, iii) is greater than 0.5 s, iv) is greater than 1 s, v) is greater than 2 s, vi) is greater than 4 s, vii) is greater than 10 s, viii) is greater than 15 s, or ix) is greater than 20 s.

5. The method as recited in claim 2, wherein the speed is ascertained one of:

i) when it is detected that the actuation of the brake pedal has ended, ii) when it is detected that the actuation of the brake pedal begins, or iii) when the minimum duration ends.

6. The method as recited in claim 1, further comprising:

detecting a position of an accelerator pedal and if, in accordance with the switching off step, the main drive unit is not in operation, the main drive unit is started if the position corresponds to an actuation of the accelerator pedal.

7. The method as recited in claim 1, wherein the operating state of the main drive unit is independent of

i) gear positions, or ii) a user input that serves exclusively to control the operation of the main drive unit.

8. A device for controlling a main drive unit of a drive of a vehicle, wherein the drive includes the main drive unit and an auxiliary tractive energy source as the drive unit of the vehicle, the device comprising:

an input for detecting a degree of actuation of a brake pedal;

a time standard which is connected to the input and is adapted to detect a duration of actuation of an uninterrupted actuation of the brake pedal on the basis of the detected degree of actuation and to output a time duration signal corresponding to the duration of actuation;

a comparator which is connected to the time standard and is adapted to compare the time duration signal with a minimum duration present at an input of the device or in a memory of the control and to output a comparison result; and

a control output which is adapted for activation and connection to the main drive unit and which outputs an off signal if the comparison result indicates a time duration signal that is greater than the minimum duration and which outputs an on signal or no off signal if the comparison result indicates a time duration signal that is not greater than the minimum duration.

9. The device as recited in claim 8, further comprising:

a speed input adapted to receive a signal representing a speed from a speed sensor for detecting a speed of the vehicle and transmit it to a calculating unit of the device, the calculating unit adapted to correlate with the detected speed the minimum duration which reduces with decreasing speed.

10. The device as recited in claim 9, further comprising:

a logic which is connected to the input and is adapted to determine an end of the actuation on the basis of the detected degree of actuation and which is connected to the calculating unit in order to transmit to the calculating unit when the end of the actuation occurs a trigger signal which causes the calculating unit to carry out the correlation between speed and minimum duration.