Scale based load limiting for refuse vehicles
A weight based load limiting system for a refuse vehicle. The system includes a weight determination module that generates a signal that varies in accordance with a vehicle weight. If the vehicle weight approaches or exceeds a predetermined maximum weight, the signal inhibits a portion of the loading or packing operation to prevent overloading the vehicle. In various configurations, the inhibiting can be to prevent a lifting of a refuse container to prevent emptying the container into the vehicle hopper. In other various configurations, the inhibiting occurs by maintaining engine power to less than the engine power typically output during a packing operation.
1. A refuse vehicle, comprising:
a container coupled to a chassis of the refuse vehicle;
a lift coupled to the container, the lift comprising an arm assembly configured to engage a refuse receptacle; and
a control system configured to:
initiate a dump motion of the lift to dump refuse from the receptacle into the container;
determine a weight corresponding to the refuse in the receptacle;
determine a weight corresponding to the container; and
in response to determining that the weight corresponding to the refuse in the receptacle together with the weight corresponding to the container exceeds a threshold value:
inhibit the dump motion of the lift beyond a predetermined position; and
enable reversal of the dump motion from the predetermined position.
2. The refuse vehicle of claim 1 , wherein refuse vehicle defines a forward direction of travel, and wherein the container resides on the chassis of the refuse vehicle behind an operator cab of the refuse vehicle.
3. The refuse vehicle of claim 2 , wherein the arm assembly comprises a front-loading arm assembly extending from behind the operator cab to in front of the operator cab.
4. The refuse vehicle of claim 3 , wherein the front-loading arm comprises a fork mechanism.
5. The refuse vehicle of claim 2 , wherein the arm assembly comprises a side-loading arm assembly residing behind the operator cab.
6. The refuse vehicle of claim 5 , wherein the side-loading arm assembly comprises a gripper for engaging the refuse receptacle.
7. The refuse vehicle of claim 6 , wherein the lift comprises at least one of a solenoid-controlled air valve, an electric circuit, or a pneumatic circuit.
8. The refuse vehicle of claim 1 , further comprising a weight determination system, and wherein the control system is configured to determine the weight of the refuse in the receptacle based on output from the weight determination system.
9. The refuse vehicle of claim 8 , wherein the weight determination system comprises at least one of a weight sensor or a scale.
10. The refuse vehicle of claim 8 , wherein the threshold value corresponds to a maximum vehicle payload.
11. The refuse vehicle of claim 8 , further comprising a lift lockout configured to receive a signal from the control system and responsively prevent upward motion of the lift without inhibiting downward motion of the lift.
12. The refuse vehicle of claim 11 , wherein the lift lockout comprises an interlock including at least one of a solenoid or a pneumatic device.
13. The refuse vehicle of claim 11 , wherein the signal comprises a lift signal, and wherein the lift lockout is configured to prevent the arm assembly of the lift from receiving the lift signal.