Granted Patent B2

US 7,531,977 · App. 11/533,082 · Granted May 12, 2009

Abstract

Claims (10)

1. A method of using an externally powered HVAC system for an over-the-road motor coach, comprising:

coupling the HVAC system to an external shore power source at a temporary stop location for the over-the-road motor coach while the over-the-road motor coach is parked and vehicle engine is turned off;

receiving electrical power from the electrical outlet to power the HVAC system;

using the HVAC system to circulate refrigerant for heating or cooling an interior cabin of the over-the-road motor coach and power HVAC fans to ventilate the interior cabin of the over-the-road motor coach, wherein using the HVAC system includes powering an electric motor and driving an engine with the electric motor with fuel supply shut off to the engine, and the engine driving a PTO HVAC compressor and a PTO alternator.

2. The method of claim 1 , wherein the external shore power source is an external shore power 230 volt AC three phase power source.

3. The method of claim 1 , wherein using the HVAC system to power HVAC fans includes receiving power at a24 Volt DC power supply and supplying power from the 24 Volt DC power supply power to the HVAC fans to ventilate the interior cabin of the over-the-road motor coach.

4. The method of claim 3 , wherein the 24 Volt DC power supply supplies power to the HVAC fans and the rest of the 24 Volt DC loads of the motor coach through the 24 Volt DC distribution system of the motor coach.

5. The method of claim 1 , wherein the electric motor is a separate, added-on 230 VAC 3-phase electric motor.

6. The method of claim 1 , wherein the electric motor drives the engine through a cog belt drive.

7. The method of claim 1 , wherein the electric motor drives the engine through a PTO gear drive.

Assignments (11)