Integrated ignition and electronic auto-choke module for an internal combustion engine

Patent metadata

Field	Value
Publication number	US-10240543-B2
Application number	US-201615258679-A
Country	US
Kind code	B2
Filing date	Sep 7, 2016
Priority date	Aug 15, 2013
Publication date	Mar 26, 2019
Grant date	Mar 26, 2019

Abstract

An integrated ignition and electronic auto-choke module for an internal combustion engine and an internal combustion engine including the same. In one aspect, the module includes a housing that is configured to be mounted to an engine block of an internal combustion engine. The housing may contain at least a portion of a first temperature sensor that measures a first temperature indicative of an engine temperature. The housing may also contain a controller and at least a portion of an ignition circuit. The controller may be coupled to the first temperature sensor and configured to determine a starting position of a choke valve based on the first temperature and operate an actuator to move the choke valve into the starting position accordingly.

First claim

What is claimed is:

1. An integrated ignition and electronic auto-choke module comprising:
a housing configured to be mounted to an engine block of an internal combustion engine; adjacent a flywheel;
the housing at least partially containing:
a first temperature sensor configured for measuring a first temperature indicative of an engine temperature;
a controller operably coupled to the first temperature sensor via a communication pathway, the controller configured to: determine a starting position of a choke valve based on the first temperature; and operate an actuator to move the choke valve into the starting position during a first choke opening stage; and
an ignition circuit
a lamination stack, the lamination stack configured to be coupled to the engine block and to the housing to mount the housing to the engine block
wherein the first temperature sensor is coupled to the lamination stack and protrudes from the housing and wherein the controller is fully disposed within an interior of the housing.

2. The integrated ignition and electronic auto-choke module according to claim 1 wherein the ignition circuit comprises, in operable cooperation, an ignition coil, a charging coil, an energy storage device, and a switch, each of which is positioned within an interior cavity of the housing.

3. The integrated ignition and electronic auto-choke module according to claim 2 further comprising a potting compound that seals the interior cavity of the housing.

4. The integrated ignition and electronic auto-choke module according to claim 2 wherein the controller, which is positioned within the interior cavity of the housing, is operably coupled to the charging coil and configured to determine rotational speed of the internal combustion engine.

5. The integrated ignition and electronic auto-choke module according to claim 1 wherein the ignition circuit is a magneto ignition system.

6. The integrated ignition and electronic auto-choke module according to claim 1 wherein the housing at least partially contains a second temperature sensor for measuring a second temperature indicative of an ambient air temperature, the second temperature sensor operably coupled to the controller.

7. The integrated ignition and electronic auto-choke module according to claim 6 wherein the second temperature sensor protrudes from the housing so that at least a portion of the second temperature sensor remains exposed outside of the housing.

8. An internal combustion engine comprising:
an engine block;
a combustion chamber that receives a fuel mixture;
a choke valve for adjusting a fuel-to-air ratio of the fuel mixture received by the combustion chamber; and
an integrated ignition and electronic auto-choke module comprising a housing configured to be mounted to the engine block, the housing at least partially containing:
a first temperature sensor configured for measuring temperature of the engine block as a first temperature;
a controller operably coupled to the first temperature sensor via a communication pathway, the controller configured to: determine a starting position of the choke valve based on the first temperature; and operate an actuator to move the choke valve into the starting position during a first choke opening stage; and
an ignition circuit.

9. The integrated ignition and electronic auto-choke module according to claim 8 wherein the first characteristic is a rate at which the choke valve is moved during the first ramp.

10. An internal combustion engine comprising:
an engine block;
a combustion chamber that receives a fuel mixture;
a choke valve for adjusting a fuel-to-air ratio of the fuel mixture received by the combustion chamber; and
an integrated ignition and electronic auto-choke module comprising a housing configured to be mounted to the engine block, the housing at least partially containing:
a first temperature sensor configured for measuring temperature of the engine block as a first temperature;
a controller operably coupled to the first temperature sensor via a communication pathway, the controller configured to: determine a starting position of the choke valve based on the first temperature; and operate an actuator to move the choke valve into the starting position during a first choke opening stage; and
an ignition circuit
a second temperature sensor for measuring temperature of ambient air as a second temperature, the second temperature sensor operably coupled to the controller;
determine a first ramp for opening the choke valve from the starting position to a fully open position based on the first temperature and the second temperature; and operate the actuator to adjust the choke valve from the starting position to the fully open position in accordance with the first ramp.

11. The internal combustion engine according to claim 10 wherein the first temperature sensor is thermally coupled to an engine crankcase of the engine block adjacent a flywheel.

12. The internal combustion engine according to claim 11 wherein the integrated ignition and electronic auto-choke module further comprises a lamination stack coupled to the housing, wherein the first temperature sensor is thermally coupled to the lamination stack, and wherein the lamination stack is thermally coupled to the engine block.

13. The internal combustion engine according to claim 10 wherein the ignition circuit comprises, in operable cooperation, an ignition coil, a charging coil, an energy storage device, and a switch, and wherein the controller is operably coupled to the charging coil and configured to determine rotational speed of the internal combustion engine.

14. The internal combustion engine according to claim 10 wherein the first ramp is based on a differential of the first temperature and the second temperature.

15. The internal combustion engine according to claim 10 wherein the housing at least partially contains the second temperature sensor, the second temperature sensor protruding from the housing so that at least a portion of the second temperature sensor remains exposed outside of the housing.

16. The internal combustion engine according to claim 10 further comprising a blower housing, the engine Hock located within the blower housing, the second temperature sensor exposed to an air intake stream of the blower housing.

Assignees

• Kohler Co

Inventors

• Kleczewski Michael Robert
• Tursky Michael J
• Patrawala Pezaan Sham
• Thakur Awadhesh Kumar

Classifications

• F02D41/1454

  the characteristics being an oxygen content or concentration or the air-fuel ratio · CPC title

• F02D2200/101

  Engine speed · CPC title

• F02D2200/0414

  Air temperature · CPC title

• F02M1/08

  the means to facilitate starting or idling becoming operative or inoperative automatically (in connection with auxiliary carburetting apparatus F02M1/04) · CPC title

• F02M1/10

  dependent on engine temperature, e.g. having thermostat · CPC title