Vehicle wheel speed-based determination or estimation of a load weight of a load carried by a commercial vehicle
First Claim
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1. A method for determining or estimating a load weight of a load carried by a commercial vehicle using a vehicle control system, in particular by an industrial truck such as a forklift truck, comprising:
- a) determining with the vehicle control system a speed ratio between a first speed of at least one first wheel loaded by a load carried in a load carrier of the vehicle and a second speed of at least one second wheel of the operating vehicle which has received the load in the load carrier, which second wheel is less heavily loaded or not loaded by a load carried in the load carrier or is relieved by a load carried in the load carrier;
b) determining or estimating with the vehicle control system the load weight of the carried load (28) on the basis of the determined speed ratio and predetermined reference data stored in data storage, wherein a wear state of the wheels is taken into account in said determining or estimating the load weight, andc) the vehicle control system controlling at least one drive unit of a commercial vehicle based on the determining or estimating the load weight of the carried load carried by the vehicle.
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Abstract
A method for determining or estimating a load weight of a load (28) carried by a commercial vehicle, in particular by an industrial truck such as a forklift truck (10), comprises:
- a) determining a speed ratio between a first speed of at least one first wheel (12) loaded by a load carried in a load carrier (18) of the vehicle and a second speed of at least one second wheel (14) of the operating vehicle (10) which has received the load in the load carrier, which second wheel is less heavily loaded or not loaded by a load carried in the load carrier or is relieved by a load carried in the load carrier;
- b) determining or estimating the load weight of the carried load (28) on the basis of the determined speed ratio and predetermined reference data.
A commercial vehicle (10) comprising a control system (22) carrying out a method of this kind is also provided.
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Citations
19 Claims
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1. A method for determining or estimating a load weight of a load carried by a commercial vehicle using a vehicle control system, in particular by an industrial truck such as a forklift truck, comprising:
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a) determining with the vehicle control system a speed ratio between a first speed of at least one first wheel loaded by a load carried in a load carrier of the vehicle and a second speed of at least one second wheel of the operating vehicle which has received the load in the load carrier, which second wheel is less heavily loaded or not loaded by a load carried in the load carrier or is relieved by a load carried in the load carrier; b) determining or estimating with the vehicle control system the load weight of the carried load (28) on the basis of the determined speed ratio and predetermined reference data stored in data storage, wherein a wear state of the wheels is taken into account in said determining or estimating the load weight, and c) the vehicle control system controlling at least one drive unit of a commercial vehicle based on the determining or estimating the load weight of the carried load carried by the vehicle. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A commercial vehicle, in particular an industrial truck such as a forklift truck, comprising at least one drive unit, at least one load carrier and at least one first wheel loaded by a load carried in the load carrier of the vehicle and at least one second wheel which is less heavily loaded or not loaded by a load carried in the load carrier or is relieved by a load carried in the load carrier, a control system of the vehicle or the drive unit thereof being coupled to at least one first speed sensor associated with the/a first wheel and to at least one second speed sensor associated with the/a second wheel of the vehicle,
wherein the control system is configured or programmed to determine a speed ratio between a first speed of the first wheel detected by the first speed sensor and a second speed of the second wheel detected by the second speed sensor, and to determine or estimate herefrom the load weight of a load carried in the load carrier, in order to fulfil at least one function relating to the load weight or taking account of the load weight, in particular a control function, including that a wear state of the wheels is taken into account in the determining or estimating the load weight.
Specification