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US 11,993,155 B2Granted
Auxiliary power unit air conditioning for truck cab cooling
AssigneeIllinois Tool Works Inc.
InventorNathan Joe Jochman
Life of this patent
Estimating the term…
Abstract
Systems are disclosed for providing a work vehicle with a second air conditioning compressor driven by a small engine mounted on the work vehicle. The second compressor shares a refrigeration loop with the primary air conditioning compressor of the work vehicle. The small engine may be configured to drive various loads, and accordingly may include control circuitry to manage the power provided to the various loads, including the second compressor.
Claims20
An auxiliary compressor control system comprising:
- an auxiliary compressor selectively driven by an auxiliary engine, wherein the auxiliary engine is configured to provide power to one or more additional loads;
- one or more conduits connected to the auxiliary compressor, the auxiliary compressor to selectively pump fluid through a coolant loop of a cooling system integrated within a vehicle via the one or more conduits, wherein the cooling system is connected to a vehicle compressor driven by a vehicle engine;
- one or more pressure sensors to measure a pressure at the one or more conduits or the coolant loop;
- and
- a controller to engage a clutch to activate the auxiliary compressor to selectively pump fluid through the coolant loop in response to the pressure measurement falling below a threshold pressure level and the vehicle engine being off.
2 more elements
A power system comprising:
- an enclosure mounted to a back of a service vehicle comprising:
- an auxiliary engine;
- an auxiliary compressor selectively driven by the auxiliary engine via a clutch;
- one or more conduits connected to the auxiliary compressor, the auxiliary compressor to selectively pump fluid through a coolant loop of a cooling system integrated within a vehicle via the one or more conduits, wherein the cooling system is connected to a vehicle compressor driven by a vehicle engine within a vehicle engine compartment of the service vehicle;
- one or more pressure sensors to measure a pressure at the one or more conduits or the coolant loop;
- and
- a controller to engage a clutch to activate the auxiliary compressor to selectively pump fluid through the coolant loop in response to the pressure measurement falling below a threshold pressure level and the vehicle engine being off.
4 more elements
An auxiliary compressor control system comprising:
- an auxiliary compressor selectively driven by an auxiliary engine;
- one or more conduits connected to the auxiliary compressor, the auxiliary compressor to selectively pump fluid through a coolant loop of a cooling system via the one or more conduits, wherein the cooling system is connected to a primary compressor driven by a primary engine, the primary compressor controlled by a primary controller to selectively pump the fluid through the coolant loop via the one or more conduits;
- one or more pressure sensors to measure a pressure at the one or more conduits or the coolant loop;
- and
- an auxiliary controller to:
- receive control signals to activate the cooling system;
- receive control signals to activate the auxiliary compressor in response to the pressure measurement falling below a threshold pressure level and the vehicle engine being off;
- and
- control the auxiliary engine to drive the auxiliary compressor to pump fluid through the coolant loop based on the control signals.
6 more elements
Dependencies are inferred from the claim text.