Control of an opposed-piston engine with a mass airflow sensor located after a charge air cooler

Patent metadata

Field	Value
Publication number	US-11384681-B2
Application number	US-201916694943-A
Country	US
Kind code	B2
Filing date	Nov 25, 2019
Priority date	Nov 25, 2019
Publication date	Jul 12, 2022
Grant date	Jul 12, 2022

Abstract

An opposed-piston engine includes an electronic sensor located in a charge air channel, at position between an outlet of a charge air cooler and an air intake component that distributes charge air to cylinder intake ports of the engine. The electronic sensor is disposed to measure a rate of mass airflow between the outlet of the charge air cooler and the intake component and generate electronic signals indicative of the rate of mass airflow from the charge air cooler. A control mechanization of the opposed-piston engine is electrically connected to the electronic sensor for controlling air handling devices, fuel provisioning devices, and/or EGR devices in response to the electronic signals.

First claim

The invention claimed is:

1. An opposed-piston engine, comprising:
an air intake component for distributing charge air to one or more cylinder intake ports of the engine;
a charge air cooler having an outlet in airflow communication with the air intake component;
a compressor disposed in tandem with a supercharger in a multi-stage pumping configuration operative to provide charge air to an inlet of the charge air cooler;
an electronic sensor disposed to measure a rate of mass airflow between the outlet of the charge air cooler and the intake component and generate electronic signals indicative of the rate of mass airflow; and,
a control mechanization electrically connected to the electronic sensor for causing actuation of one or more air handling devices in response to the electronic signals.

2. The opposed-piston engine of claim 1 , wherein the one or more air handling devices comprise a supercharger drive and a supercharger recirculation valve.

3. The opposed-piston engine of claim 1 , wherein the one or more air handling devices comprise a variable-geometry turbine.

4. The opposed-piston engine of claim 1 , wherein the one or more air handling devices comprise a turbine wastegate valve and an exhaust backpressure valve.

5. The opposed-piston engine of claim 1 , wherein the one or more air handling devices include an EGR valve.

6. The opposed-piston engine of claim 2 , wherein the one or more air handling devices comprise a variable-geometry turbine.

7. The opposed-piston engine of claim 6 , wherein the one or more air handling devices comprise a turbine wastegate valve and an exhaust backpressure valve.

8. The opposed-piston engine of claim 7 , wherein the one or more air handling devices include an EGR valve.

9. The opposed-piston engine of any one of claims 1 - 8 , wherein the air intake component for distributing charge air to one or more cylinder intake ports of the engine comprises one of an intake air chest formed in a cylinder block of the opposed-piston engine and a manifold coupled to the cylinder block of the opposed-piston engine.

10. An opposed-piston engine, comprising:
an air intake component for distributing charge air to one or more cylinder intake ports of the engine;
a charge air cooler having an outlet in airflow communication with the air intake component;
a compressor disposed in tandem with a supercharger in a multi-stage pumping configuration operative to provide charge air to an inlet of the charge air cooler;
an electronic sensor disposed to measure a rate of mass airflow between the outlet of the charge air cooler and the intake component and generate electronic signals indicative of the rate of mass airflow; and,
a control mechanization electrically connected to the electronic sensor for causing actuation of one or more fuel provisioning devices in response to the electronic signals.

11. The opposed-piston engine of claim 10 , wherein the one or more fuel provisioning devices comprise at least one common fuel rail, at least one fuel pump, and at least one fuel injector.

12. The opposed-piston of claim 11 , wherein the control mechanization is further electrically connected to the electronic sensor for causing actuation of one or more air handling devices in response to the electronic signals.

13. The opposed-piston engine of claim 12 , wherein the one or more air handling devices comprise a variable-geometry turbine.

14. The opposed-piston engine of claim 12 , wherein the one or more air handling devices comprise a turbine wastegate valve and an exhaust backpressure valve.

15. The opposed-piston engine of claim 12 , wherein the one or more air handling devices include an EGR valve.

16. The opposed-piston engine of claim 12 , wherein the one or more air handling devices comprise a supercharger drive and a supercharger recirculation valve.

17. The opposed-piston engine of any one of claims 10 - 16 , wherein the air intake component for distributing charge air to one or more cylinder intake ports of the engine comprises one of an intake air chest formed in a cylinder block of the opposed-piston engine and a manifold coupled to the cylinder block of the opposed-piston engine.

Assignees

• Achates Power Inc

Inventors

• Kothandaraman Govindarajan
• Borhan Hoseinali
• Koeberlein David E
• Doig Dwight A

Classifications

• F02B75/28

  Engines with two or more pistons reciprocating within same cylinder or within essentially coaxial cylinders (arranged oppositely relative to main shaft F02B75/24) · CPC title

• F02B29/0406 Primary

  Layout of the intake air cooling or coolant circuit · CPC title

• F02B25/08 Primary

  Engines with oppositely-moving reciprocating working pistons · CPC title

• F02M35/10386

  for flow rate (air flow meters in air cleaners F02M35/021; circuit arrangements for generating control signals by measuring intake air flow F02D41/18) · CPC title

• F02B75/24

  with cylinders arranged oppositely relative to main shaft and of "flat" type · CPC title