ADAPTIVE CRUISE CONTROL METHOD ON INCLINE

• US 20110282558A1
• Filed: 05/11/2011
• Published: 11/17/2011
• Est. Priority Date: 05/12/2010
• Status: Active Grant

• Current Assignee: HL Klemove Corporation
• Original Assignee: Mando Corporation
• Inventors: Park, Byung Suk
• Granted Patent: US 8,504,274 B2
• Time in Patent Office: Days
• US Class Current: 701/94
• CPC Class Codes: B60W 2520/28 Wheel speed
• CPC Class Codes: B60W 30/143 Speed control B60W30/16 takes precedence
• CPC Class Codes: B60W 30/18054 at stand still, e.g. engine in idling state hill holding B60W30/18118
• CPC Class Codes: B60W 30/18118 Hill holding
• CPC Class Codes: B60W 40/076 Slope angle of the road
• CPC Class Codes: B60W 40/1005 Driving resistance
• CPC Class Codes: F02N 11/0837 Environmental conditions thereof, e.g. traffic, weather or road conditions
• CPC Class Codes: F02N 2200/124 Information about road conditions, e.g. road inclination or surface

Abstract

Disclosed herein is an adaptive cruse control method on an incline to improve traveling performance and stoppage maintenance performance on an incline. During adaptive cruise control, a gradient of a road is estimated based on a vehicle acceleration and longitudinal acceleration to enable compensation of a resistance torque with respect to the gradient of the road, which prevents deterioration of a traveling speed of a vehicle on an incline. Also, compensating for a brake torque to prevent the vehicle from being pushed rearward when the vehicle is stopped or starts to go on an incline may prevent deterioration of performance on an incline.

Claims

1. An adaptive cruise control method on an incline comprising:

sensing a wheel speed and a longitudinal acceleration during adaptive cruise control;

calculating a vehicle acceleration based on the sensed wheel speed;

estimating a gradient of a road from the calculated vehicle acceleration and the longitudinal acceleration;

calculating a resistance torque based on the gradient of the road; and

controlling traveling and stoppage maintenance of a vehicle using the resistance torque.

2. The method according to claim 1, wherein the traveling control of the vehicle includes compensating for a resistance torque of the vehicle traveling on an incline having a gradient, to prevent deterioration in a traveling speed of the vehicle.

3. The method according to claim 1, wherein the stoppage maintenance control of the vehicle includes compensating for a brake torque for stoppage maintenance by adding the resistance torque of the vehicle based on the gradient of the incline to a brake torque on flat land when the vehicle is stopped or starts to go on the incline.