Hybrid powertrain and method for controlling a hybrid powertrain
View Patent ↗A hybrid powertrain for a vehicle is provided. The powertrain includes an engine boosted by a turbocharger. The turbocharger includes a first motor-generator mounted with respect to the turbocharger, and arranged to selectively assist acceleration of the vehicle by driving the turbocharger, to provide regenerative charging of an energy storage device and to be idle, as its modes of operation. The powertrain additionally includes a second motor-generator mounted with respect to the powertrain, and arranged to selectively assist acceleration of the vehicle, to provide regenerative charging of the energy storage device and to be idle, as its modes of operation. A controller responsive to sensed vehicle operating parameters is arranged on the vehicle for controlling and coordinating the modes of operation of the first motor-generator and of the second motor-generator.
1. A hybrid powertrain for a vehicle comprising:
an internal combustion engine arranged to propel a vehicle;
a turbocharger arranged relative to the engine for boosting torque of the engine and assisting acceleration of the vehicle;
an energy storage device arranged with respect to the powertrain for storing electrical energy;
a first motor-generator mounted with respect to the turbocharger and arranged to selectively assist acceleration of the vehicle by driving the turbocharger, to provide regenerative charging of the energy storage device, and to be idle, as modes of operation;
a second motor-generator mounted with respect to the powertrain and arranged to selectively assist acceleration of the vehicle, to provide charging of the energy storage device, to provide regenerative charging of the energy storage device, and to be idle, as modes of operation;
a sensor arranged with respect to the powertrain for sensing vehicle operating parameters; and
a controller responsive to the sensed vehicle operating parameters and arranged with respect to the powertrain for controlling and coordinating the modes of operation of the first motor-generator and of the second motor-generator;
wherein the controller is configured with a stored algorithm to combine the modes of operation of the first motor-generator and of the second motor-generator in a first group for assisting vehicle acceleration and the modes of operation of the first motor-generator and of the second motor-generator in a second group for providing regenerative charging, and additionally configured to select a combination from the first group to assist vehicle acceleration and from the second group to provide regenerative charging.
2. The hybrid vehicle powertrain of claim 1 , wherein the first motor-generator is integrated with the turbocharger.
3. The hybrid vehicle powertrain of claim 1 , wherein the second motor-generator is arranged as an alternator-starter.
4. The hybrid vehicle powertrain of claim 1 , wherein the controller further controls turbocharger boost.
5. The hybrid vehicle powertrain of claim 1 , further comprising a transmission operatively connected to the engine for transmitting torque from the engine, wherein the vehicle operating parameters include engine data, transmission data and vehicle speed.
6. The hybrid vehicle powertrain of claim 5 , wherein the second motor-generator is integrated with the transmission, and the controller further controls function of the transmission.
7. The hybrid vehicle powertrain of claim 6 , wherein the controller further controls function of a separate alternator.
8. The hybrid vehicle powertrain of claim 1 , wherein the energy storage device comprises a battery.
9. The hybrid powertrain of claim 1 , wherein the energy storage device comprises a super-capacitor.
10. A method of controlling a hybrid vehicle powertrain including an engine with a turbocharger comprising:
monitoring vehicle operator selected vehicle acceleration and vehicle deceleration;
monitoring vehicle operating parameters;
monitoring operating conditions of a first motor-generator mounted with respect to the turbocharger and arranged to selectively assist acceleration of the vehicle by driving the turbocharger, and of a second motor-generator operatively connected to the engine;
combining modes of operation of the first motor-generator and modes of operation of the second motor-generator where vehicle acceleration is assisted, and combining modes of operation of the first motor-generator and modes of operation of the second motor-generator where regenerative charging is provided, wherein the modes of operation of the first motor-generator include conditions in which vehicle acceleration is assisted, regenerative charging of an energy storage device arranged on the vehicle is provided, and the first motor-generator is idle, and the modes of operation of the second motor-generator include conditions in which vehicle acceleration is assisted, charging of the energy storage device is provided, regenerative charging of the energy storage device is provided, and the second motor-generator is idle;
grouping into a first option combinations of the modes of operation of the first motor-generator and the modes of operation of the second motor-generator where vehicle acceleration is assisted, and grouping into a second option combinations of the modes of operation of the first motor-generator and the modes of operation of the second motor-generator where regenerative charging is provided; and
controlling and coordinating operation of the first motor-generator and of the second motor-generator by selecting from the combinations in the first option for acceleration assist, and from the combinations in the second option for deceleration.
11. The method of claim 10 , wherein said controlling and coordinating further comprises controlling turbocharger boost.
12. The method of claim 10 , wherein said monitoring operating conditions of the first motor-generator comprises monitoring of the first motor-generator integrated with the turbocharger.
13. The method of claim 10 , wherein the powertrain includes a transmission, and wherein said monitoring vehicle operating parameters comprises monitoring engine data, transmission data and vehicle speed.
14. The method of claim 13 , wherein the second motor-generator is integrated into the transmission and monitoring operating conditions of the second motor-generator further comprises monitoring functions of the transmission.
15. The method of claim 14 , wherein said monitoring vehicle operating parameters further comprises monitoring function of a separate alternator.
16. The method of claim 10 , wherein said regenerative charging of the energy storage device comprises regenerative charging of a battery.
17. The method of claim 10 , wherein said regenerative charging of the energy storage device comprises regenerative charging of a super-capacitor.