Parallel hybrid drive system utilizing power take off connection as transfer for a secondary energy source
First Claim
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1. In a vehicle power drive system, the combination comprising:
- an internal combustion engine connected through a transmission to drive wheels of said vehicle;
said transmission having a power take off (PTO) and PTO output gear;
a parallel hybrid drive system connected to said PTO comprising an electric motor, an energy storage system and a vehicle monitoring and control system (VMCS);
said electric motor connected through a shaft to said PTO for bi-directional power flow;
said electric motor having an accessory device;
said energy storage system connected to said electric motor for sending and receiving electric power;
said vehicle monitoring and control system (VMCS) having a first, accelerating mode for delivering electric power from said energy storage system to said electric motor to provide drive power to said transmission for supplementing drive power being delivered by said engine to said wheels of said vehicle and a second, deceleration mode having said electric motor receive shaft power from said PTO while acting as a generator to provide regenerative braking and recharging said energy storage system when said engine is not delivering power to said wheels, wherein further said PTO can be disengaged from the transmission, allowing said electric motor to freely provide power to the said accessory device from the said energy storage system.
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Abstract
A parallel hybrid vehicle system utilizing the Power Take Off connection on an automatic transmission as a transfer port for a secondary device is described for both driving modes and stationary operation. The secondary device is a battery powered electric motor providing motive power or regenerative braking in driving mode or providing power to accessories typically mounted to a conventional PTO while stationary.
204 Citations
24 Claims
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1. In a vehicle power drive system, the combination comprising:
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an internal combustion engine connected through a transmission to drive wheels of said vehicle; said transmission having a power take off (PTO) and PTO output gear; a parallel hybrid drive system connected to said PTO comprising an electric motor, an energy storage system and a vehicle monitoring and control system (VMCS); said electric motor connected through a shaft to said PTO for bi-directional power flow; said electric motor having an accessory device; said energy storage system connected to said electric motor for sending and receiving electric power; said vehicle monitoring and control system (VMCS) having a first, accelerating mode for delivering electric power from said energy storage system to said electric motor to provide drive power to said transmission for supplementing drive power being delivered by said engine to said wheels of said vehicle and a second, deceleration mode having said electric motor receive shaft power from said PTO while acting as a generator to provide regenerative braking and recharging said energy storage system when said engine is not delivering power to said wheels, wherein further said PTO can be disengaged from the transmission, allowing said electric motor to freely provide power to the said accessory device from the said energy storage system. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. In a vehicle power drive system comprising an internal combustion engine connected through a transmission to drive wheels of said vehicle, said transmission having a power take off (PTO), the method of retrofitting said drive system comprising the steps of:
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connecting a parallel hybrid drive system to said PTO through a bi-directional power flow shaft, said parallel hybrid drive system comprising an electric motor, a energy storage system, and an vehicle monitoring and control system (VMCS); and said VMCS controlling said parallel hybrid drive system to use said electric motor to supplement drive power to said wheels of said vehicle when said internal combustion engine is driving said wheels and providing regenerative braking when said engine is not delivering power to said wheels whereby said battery in said parallel hybrid drive system is recharged. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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Specification