METHOD FOR DETECTING A GAS AMOUNT

• US 20190162127A1
• Filed: 05/11/2017
• Published: 05/30/2019
• Est. Priority Date: 05/11/2016
• Status: Active Grant

• Current Assignee: INNIO Jenbacher GmbH & Co.,OG.
• Original Assignee: GE Jenbacher GmbH & Company OHG (General Electric Company)
• Inventors: HUBER, Johannes, GRUBER, Friedrich
• Granted Patent: US 10,641,196 B2
• Time in Patent Office: Days
• CPC Class Codes: F02B 19/00 Engines characterised by precombustion chambers
• CPC Class Codes: F02D 19/024 by controlling fuel injectors
• CPC Class Codes: F02D 19/025 Failure diagnosis or prevention; Safety measures; Testing
• CPC Class Codes: F02D 19/026 Measuring or estimating parameters related to the fuel supply system
• CPC Class Codes: F02D 41/0027 the fuel being gaseous non-electrical control F02D19/02
• CPC Class Codes: F02D 41/0085 Balancing of cylinder outputs, e.g. speed, torque or air-fuel ratio
• CPC Class Codes: F02D 41/1446 the characteristics being exhaust temperatures
• CPC Class Codes: F02D 41/2438 Active learning methods
• CPC Class Codes: F02D 41/2467 for injectors
• CPC Class Codes: Y02T 10/12 Improving ICE efficiencies
• CPC Class Codes: Y02T 10/30 Use of alternative fuels, e.g. biofuels

Abstract

A method for detecting the quantity of gas (m) which is supplied by means of a gas supply device to an antechamber of an internal combustion engine, whereby a targeted disturbance (Δu) of the gas quantity (m) supplied by the gas supply device is performed and a change (ΔT) resulting from the target disturbance (Δu) in an exhaust gas temperature (T) of an exhaust gas generated in a combustion chamber connected to the antechamber is measured, whereby, by comparison with a target value of the change (ΔTtarget) of the exhaust gas temperature (T), the gas quantity (m) supplied by means of the gas supply device is deduced.

Claims

1. A method for detecting the quantity of gas (m) which is supplied by means of a gas supply device to an antechamber of an internal combustion engine, wherein a targeted disturbance (Δ

u) of the gas quantity (m) supplied by the gas supply device is performed and a change (Δ

T) resulting from the target disturbance (Δ

u) in an exhaust gas temperature (T) of an exhaust gas generated in a combustion chamber connected to the antechamber is measured, whereby, by comparison with a setpoint value of the change (Δ

Ttarget) of the exhaust gas temperature (T), the gas quantity (m) supplied by means of the gas supply device is deduced.

2. Method according to claim 1, whereby a gradient (dT/dm) of the exhaust gas temperature (T) with respect to the quantity of gas (m) is calculated taking account the change (Δ

m) in the quantity of gas (m) resulting from the targeted disturbance (Δ

u).

3. Method according to claim 2, whereby the calculated gradient (dT/dm) is compared with a target value of the gradient (dT/dmtarget) to make the deduction of the quantity of gas (m) supplied by means of the gas supply device.

6. Method according to claim 1, whereby the gas supply device(s) is or are formed as a channel or channels connected to an antechamber gas line, and the targeted disturbance (Δ

u) is performed—

individually for each gas supply device—

by changing a gas pressure in the antechamber gas line and/or by changing a quantity of air supplied to the antechamber gas line.

7. Method according to claim 1, whereby the gas supply device(s) is/are formed as an active antechamber gas valve(s) connected to an antechamber gas line, and the targeted disturbance (Δ

u) is performed by changing an opening duration and/or an opening time of the antechamber gas valve(s).

8. Method according to claim 1, whereby the targeted disturbance (Δ

u) is performed in the direction of a reduced quantity of gas (m).

4. Method for detecting the quantity of gas (m) which is supplied to at least two antechambers of an internal combustion engine by means of associated gas supply devices, wherein a targeted disturbance (Δ

u) of the supplied quantity of gas (m) is performed, and individually for combustion chambers connected to at least two antechambers, a change (Δ

T) of an exhaust gas temperature (T) of an exhaust gas resulting from the targeted disturbance (Δ

u) is measured, whereby, by comparing the resulting changes (Δ

T) in the exhaust gas temperatures (T), a difference between the quantities of gas (m) supplied by means of the different gas supply devices is deduced.

5. Method for equalization of the quantity of gas (m) which is supplied to at least two antechambers of an internal combustion engine by means of associated gas supply devices, wherein a targeted disturbance (Δ

u) of the supplied quantity of gas (m) is performed, and individually for combustion chambers connected to at least two antechambers, a change (Δ

T) of an exhaust gas temperature (T) of an exhaust gas resulting from the targeted disturbance (Δ

u) is measured, whereby, by comparing the resulting changes (Δ

T) in the exhaust gas temperatures (T), a difference is determined and an actuation of at least one of the at least two antechambers occurs such that the difference disappears.

9. An internal combustion engine with:

at least one combustion chamber

an antechamber connected to the at least one combustion chamber

a gas supply device for the antechamber

a control unit for controlling the gas supply device,

a temperature sensor assigned to the at least one combustion chamber to measure an exhaust gas temperature (T) of an exhaust gas generated in the at least one combustion chamber, whereby the temperature sensor is connected to the control unit, wherein the control unit is designed to

perform a targeted disturbance (Δ

u) of the quantity of gas (m) supplied by means of the gas supply device and

by means of the temperature sensor, to measure a change (Δ

T) of the exhaust gas temperature (T) resulting from the targeted disturbance (Δ

u), and

by comparison with a stored target value of the change (Δ

Ttarget) in the exhaust gas temperature (T), to deduce the quantity of gas (m) supplied by means of the gas supply device.

12. An internal combustion engine according to claim 9, whereby the gas supply device(s) is/are designed as an antechamber gas line, and the control unit is designed to perform the targeted disturbance (Δ

u) by changing a gas pressure in the antechamber gas line and/or by changing a quantity of air supplied to the antechamber gas line.

13. An internal combustion engine according to claim 9, whereby the gas supply device(s) is/are designed as (an) active antechamber gas valve(s), and the control unit is designed to perform the targeted disturbance (Δ

u) by changing an opening duration and/or an opening time of the antechamber gas valve(s).

10. An internal combustion engine with:

at least two combustion chambers

at least two antechambers which are each connected to one of the at least two combustion chambers

a gas supply device for each of the at least two antechambers

a control unit for controlling the gas supply devices,

at least two temperature sensors which are each assigned to one of the at least two combustion chambers, to measure an exhaust gas temperature (T) of an exhaust gas generated in the at least one combustion chamber, whereby each temperature sensor is connected to the control unit, wherein the control unit is designed

to perform, for each of the at least two antechambers, a targeted disturbance (Δ

u) of the quantity of gas (m) supplied by means of each gas supply device, and

by means of the assigned temperature sensor, to measure a change (Δ

T) of the exhaust gas temperature (T) of each combustion chamber resulting from the targeted disturbance (Δ

u), and

by comparison of the resulting changes (Δ

T) of the exhaust gas temperatures (T), to calculate a difference.

11. An internal combustion engine according to claim 10, whereby the control unit is designed to actuate at least one of the at least two antechambers in such a way that the difference disappears.