Vehicle systems and methods with improved heating performance

Patent metadata

Field	Value
Publication number	US-9527495-B2
Application number	US-201414567236-A
Country	US
Kind code	B2
Filing date	Dec 11, 2014
Priority date	Dec 11, 2014
Publication date	Dec 27, 2016
Grant date	Dec 27, 2016

Abstract

A vehicle system includes an electric motor, an internal combustion engine, and a heating system configured to transfer heat from the internal combustion engine to a passenger compartment of the vehicle. The system includes a controller configured to operate the electric motor and the internal combustion engine according to one of a plurality of drive cycle profiles. The controller selects the drive cycle profile based on an ambient temperature. The drive cycle profiles include a first drive cycle profile that commands power from the electric motor until the battery system reaches a predetermined state of charge and subsequently commands power from the internal combustion engine and a second drive cycle profile that commands power from the internal combustion engine and subsequently commands power from the electric motor.

First claim

What is claimed is:

1. A system for a vehicle, comprising:
a battery system;
an electric motor coupled to the battery system and configured to selectively provide power to the vehicle with energy from the battery system;
an internal combustion engine configured to selectively provide power to the vehicle;
a heating system configured to transfer heat from the internal combustion engine to a passenger compartment of the vehicle;
an ambient temperature sensor configured to determine an ambient temperature; and
a controller configured to receive the ambient temperature from the ambient temperature sensor and to operate the electric motor and the internal combustion engine according to one of a plurality of drive cycle profiles, the controller configured to select the drive cycle profile from the plurality of drive cycle profiles based on the ambient temperature, the plurality of drive cycle profiles including:
a first drive cycle profile that commands power from the electric motor until the battery system reaches a predetermined state of charge and subsequently commands power from the internal combustion engine, and
a second drive cycle profile that commands power from the internal combustion engine and subsequently commands power from the electric motor,
wherein the controller is configured to select the first drive cycle profile when the ambient temperature is greater than the predetermined temperature and to select the second drive cycle profile when the ambient temperature is less than or equal to the predetermined temperature.

2. The system of claim 1 , wherein the second drive cycle profile commands power from the internal combustion engine at a beginning of the second drive cycle profile.

3. The system of claim 1 , wherein the controller is configured to receive a current location and an intended destination and to generate a trip profile based on the current location and the intended destination.

4. The system of claim 3 , wherein the second drive cycle profile commands power from the internal combustion engine and subsequently commands power from the electric motor such that the battery system reaches an estimate of the predetermined state of charge at the intended destination.

5. The system of claim 4 , wherein the plurality of drive cycles further includes a third drive cycle profile that commands power only from the electric motor, the controller configured to select the third drive cycle profile when the vehicle is predicted to reach the intended destination prior to the battery system reaching the predetermined state of charge.

6. The system of claim 3 , wherein the first drive cycle profile defines a first internal combustion engine energy load contribution and a first electric motor energy load contribution for the trip profile and the second drive cycle profile defines a second internal combustion engine energy load contribution and a second electric motor energy load contribution for the trip profile, and wherein the first internal combustion engine energy load contribution is approximately equal to the second internal combustion engine energy load contribution.

7. The system of claim 1 , wherein the controller is configured to receive an initial location and an intended destination and to generate a trip profile for a trip between the initial location and the intended destination, and wherein the controller is configured to select between the first drive cycle profile and the second drive cycle profile upon initiation of the trip.

8. The system of claim 7 , wherein, during the trip, the controller is configured to receive a current location and to update the trip profile between the current location and the intended destination, and wherein the controller is configured to reselect between the first drive cycle profile and the second drive cycle profile based on the updated trip profile.

9. The system of claim 8 , wherein, during the trip and when operating in accordance with the second drive cycle profile, the controller is configured to receive the ambient temperature at the current location and to switch to the first drive cycle profile when the ambient temperature is higher than the predetermined temperature.

10. The system of claim 8 , wherein the predetermined temperature is a first predetermined temperature and wherein, during the trip and when operating in accordance with the second drive cycle profile, the controller is configured to receive an engine operating temperature and to switch to the first drive cycle profile when the engine operating temperature is higher than a second predetermined temperature.

11. A method for operating a vehicle with an electric motor that provides power to the vehicle with energy from the battery system, an internal combustion engine, and a heating system that transfers heat from the internal combustion engine to a passenger compartment of the vehicle, the method comprising the steps of:
receiving an initial location and an intended destination;
generating a trip profile for a trip between the initial location and the intended destination;
determining, with an ambient temperature sensor on the vehicle, an ambient temperature
receiving, by a controller on the vehicle, the ambient temperature;
selecting, by the controller on the vehicle, a drive cycle profile from a plurality of drive cycle profiles based on the trip profile and the ambient temperature, wherein the plurality of drive cycle profiles includes a first drive cycle profile and a second drive cycle profile, wherein the first drive cycle profile commands power from the electric motor until the battery system reaches a predetermined state of charge and subsequently commands power from the internal combustion engine, and wherein the second drive cycle profile commands power from the internal combustion engine and subsequently commands power from the electric motor,
wherein the selecting step includes selecting the first drive cycle profile when the ambient temperature is greater than a predetermined temperature and selecting the second drive cycle profile when the ambient temperature is less than or equal to the predetermined temperature; and

operating the vehicle according to the selected drive cycle profile.

12. The method of claim 11 , further comprising the step of generating the first drive cycle profile and the second drive cycle profile for operating the vehicle according to the trip profile, wherein the second drive cycle profile commands power from the internal combustion engine and subsequently commands power from the electric motor such that the battery system reaches an estimate of the predetermined state of charge at the intended destination.

13. The method of claim 11 , wherein the plurality of drive cycles further includes a third drive cycle profile that commands power only from the electric motor, and
wherein the selecting step includes selecting the third drive cycle profile when the vehicle is predicted to reach the intended destination prior to the battery system reaching the predetermined state of charge.

14. The method of claim 11 , wherein the first drive cycle profile defines a first internal combustion engine energy load contribution and a first electric motor energy load contribution for the trip profile and the second drive cycle profile defines a second internal combustion engine energy load contribution and a second electric motor energy load contribution for the trip profile, and wherein the method further comprises generating the first drive cycle profile and second drive cycle profile such that the first internal combustion engine energy load contribution is approximately equal to the seco

Assignees

• Gm Global Tech Operations Llc

Inventors

• Zettel Andrew M
• Weigert Norman J
• Manickaraj Mark A
• Heap Anthony H
• Marsh Richard A
• Kothari Aniket
• Colville Michael R

Classifications

• B60W10/06

  including control of combustion engines · CPC title

• B60W2720/103

  Speed profile · CPC title

• B60H1/00764

  the input being a vehicle driving condition, e.g. speed (B60H1/00828, B60H1/00864 take precedence) · CPC title

• B60W2510/244

  Charge state · CPC title

• B60W2555/20

  Ambient conditions, e.g. wind or rain · CPC title