Methods for determining exhaust emissions and efficiency of a vehicle and a display

• US 8,478,501 B1
• Filed: 11/05/2012
• Issued: 07/02/2013
• Est. Priority Date: 11/13/2009
• Status: Active Grant

• Current Assignee: Greendrive Pty., Ltd.
• Original Assignee: Greendrive Pty., Ltd.
• Inventors: Adams, Danny Hyland Stewart
• Primary Examiner(s): ARTHUR JEANGLAUD, GERTRUDE
• Application Number:
  US13/668,806
• Time in Patent Office: 239 Days
• Field of Search: 701/66, 701/93, 701/101, 731/147.1, 73/233.1, 602/78
• US Class Current: 701/93
• CPC Class Codes: F01N 11/00 Monitoring or diagnostic devices for exhaust-gas treatment apparatus , e.g. for catalytic activity safety, indicating or supervising devices for internal combustion engines F02B77/08; testing of machines G01M13/00
• CPC Class Codes: F01N 2550/02 Catalytic activity of catalytic converters
• CPC Class Codes: F01N 2560/00 Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
• CPC Class Codes: F01N 2900/08 said parameters being related to the engine
• CPC Class Codes: F01N 2900/14 said parameters being related to the exhaust gas
• CPC Class Codes: F01N 2900/1402 Exhaust gas composition
• CPC Class Codes: F01N 3/20 specially adapted for catalytic conversion F01N3/22 takes precedence; Methods of operation or control of catalytic converters
• CPC Class Codes: F02D 2200/0625 Fuel consumption, e.g. measured in fuel liters per 100 kms or miles per gallon
• CPC Class Codes: G01L 3/26 Devices for measuring efficiency, i.e. the ratio of power output to power input
• CPC Class Codes: G01M 15/102 by monitoring exhaust gases
• CPC Class Codes: Y02A 50/20 Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
• CPC Class Codes: Y02T 10/40 Engine management systems

Abstract

Methods, software codes, and devices for determining an emission flow rate of one or more CO₂ equivalent gases from an exhaust system of an internal combustion engine of a vehicle and a method of determining a vehicle efficiency factor of the vehicle are provided. The vehicle efficiency factor is compared in real time to the corresponding point on a vehicle efficiency map based on at least one of current vehicle conditions, driving conditions, environmental conditions, and energy flow visualization data to derive a driver efficiency factor.

Claims

1. A method for determining an emission flow rate of at least one CO₂ equivalent gas from an exhaust system of an internal combustion engine of a vehicle, the engine powered by a fuel and the exhaust system comprising a catalytic converter, the method comprising:

collecting fuel data for the fuel;

generating an emissions factor for the at least one CO₂ equivalent gas;

collecting engine data for the engine;

collecting catalyst data for a catalyst;

generating a combustion factor for the at least one CO₂ equivalent gas; and

generating the emission flow rate for the at least one CO₂ equivalent gas based on a flow rate of the fuel to the engine and the respective emissions factor and the combustion factor.

2. The method according to claim 1, wherein:

the at least one CO₂ equivalent gas is CO₂ gas; and

the combustion factor is an oxidation factor.

3. The method according to claim 1, wherein:

the at least one CO₂ equivalent gas is at least one of CH₄, unburnt or partially burnt hydrocarbons (HC), CO, N₂O or other nitrogen oxides (NOx), SO₂ or other sulfur oxides (SO_x), and non-methane volatile organic compounds (NMVOC); and

the combustion factor is a vehicle factor.

4. The method according to claim 1, wherein the engine data includes at least one of the measured values of air/fuel ratio, pre-catalyst oxygen sensor, engine RPM, ignition advance, torque, throttle position, coolant temperature, barometric pressure, intake air temperature, engine vibration (knock), and engine misfire data.

5. The method according to claim 1, wherein the catalyst data includes a catalyst type and at least one of the measured values of catalyst temperature, age, poisoning factors, post-catalyst oxygen sensor, secondary air status flags, and catalyst malfunction flags.

6. The method according to claim 1, wherein the step of collecting the fuel data is carried out by at least one of inputting of a fuel type to a lookup table and downloading the relevant fuel data from the Internet based on at least one of the parameters including fuel type, fuel origin, fuel blend factors, and fuel seasonal factors.

7. The method according to claim 1, wherein the step of generating the emissions factor is based on the fuel data and derived using mathematical calculation or reference to a lookup table.

8. The method according to claim 1, which further comprises generating a pre-catalyst gas content value based on the fuel data, the engine data, and the emissions factor and derived using mathematical calculation or reference to a lookup table.

9. The method according to claim 8, which further comprises generating a post-catalyst gas content value based on the respective pre-catalyst gas content value, the catalyst data, and the fuel data and derived using mathematical calculation or reference to a lookup table.

10. The method according to claim 9, wherein the step of generating the combustion factor is based on the respective post-catalyst gas content value and derived using mathematical calculation or reference to the lookup table.

11. The method according to claim 1, wherein the emission flow rate is a volumetric flow rate or a mass flow rate.

12. The method according to claim 11, wherein the volumetric flow rate or the mass flow rate is measured over a predetermined time interval to derive respectively either a gas total volume or a gas total mass.

13. The method according to claim 1, which further comprises combining the emission flow rate for the at least one CO₂ equivalent gases to derive an overall CO₂ equivalent emission flow rate.

14. The method according to claim 13, wherein the overall CO₂ equivalent emission flow rate is a volumetric flow rate or a mass flow rate.

15. The method according to claim 14, which further comprises measuring the volumetric flow rate or the mass flow rate of the overall CO₂ equivalent emission flow rate over a predetermined time interval to derive a respective CO₂ equivalent emission gas total volume or CO₂ equivalent emission gas total mass.

16. The method according to claim 15, which further comprises representing the overall CO₂ equivalent emission flow rate numerically, graphically, or pictorially through a display in the vehicle.

17. The method according to claim 16, which further comprises representing the gas total volume or the gas total mass numerically, graphically, or pictorially through a display in the vehicle.