Evaporative emissions leak check module with integrated control and communication system

1. A leak detection module (LDM) comprising:

a housing;

a canister valve solenoid (CVS) arranged within the housing and in fluid communication along a first fluid passageway between first and second ports, the CVS movable between open and closed positions;

a pump arranged within the housing and in fluid communication with the first and second ports;

a pressure sensor in fluid communication with at least one of the first and second ports; and

a first controller arranged in the housing and in communication with the pump, the CVS and the pressure sensor, the first controller configured to run an evaporative emissions system leak detection procedure using the pump and operating the CVS between the open and closed positions to monitor a pressure within the module with the pressure sensor, the first controller configured to communicate a result based upon the monitored pressure to a second controller arranged outside the housing and remotely from the module.

2. The module of claim 1 , wherein the pump is arranged in fluid communication along a second fluid passageway between the first and second ports, the first and second fluid passageways are parallel to one another, and the pressure sensor is in fluid communication with at least one of the first and second fluid passageways.

3. The module of claim 2 , wherein the first port is a canister port configured to be fluidly connected to a charcoal canister, and the second port is an atmospheric port configured to provide substantially atmospheric pressure.

4. The module of claim 2 , comprising a CVS check arranged within the housing and in the second fluid passageway fluidly between the first port and the pump, the CVS check movable between open and closed positions, the first controller in communication with CVS check and configured to command the CVS check between its open and closed positions.

5. The module of claim 4 , wherein the housing includes first and second housing portions sealed to one another and enclosing the first controller, the pump, the CVS, the CVS check and the pressure sensor.

6. The module of claim 5 , wherein the first and second port are provided by the housing, and comprising an electrical connector provided by the housing and in electrical communication with the first controller, the pump, the CVS, the CVS check and the pressure sensor.

7. The module of claim 5 , wherein the first and second housing portions are permanently joined to one another by an adhesive and/or a weld.

8. The module of claim 1 , comprising a temperature sensor arranged within the housing and in fluid communication with at least one of the first and second ports, the first controller in communication with the temperature sensor.

9. An evaporative emissions system comprising the leak detection module of claim 1 , the system comprising:

an engine configured to provide vehicle propulsion;

a fuel tank configured to contain fuel and fuel vapors selectively supplied to the engine;

a charcoal canister configured to store the fuel vapors from the fuel tank, the first port in fluid communication with the charcoal canister;

a fuel tank isolation valve fluidly provided between fuel tank and the charcoal canister;

a purge valve in fluid communication with the charcoal canister and configured to selectively provide the fuel vapors to an engine in response to a purge command; and

wherein the first controller is an LDM controller and the second controller is an engine controller configured to operate the engine.

10. The system of claim 9 , wherein the LDM controller and the engine controller are arranged in different housings that are separate and discrete from one another.

11. The system of claim 10 , wherein the evaporative emissions system leak detection procedure is performed with the engine controller OFF.

12. The system of claim 11 , wherein the LDM controller is in a low power mode during a fuel tank stabilization period.

13. A method of performing an evaporative emissions system leak test, comprising:

initiating a test procedure with a first controller when a second controller is in a sleep state or an OFF state;

commanding with the first controller a canister valve solenoid (CVS) closed and pump to operate to pressurize or depressurize an evaporative system;

monitoring a pressure in the evaporative; and

storing a test result based upon the pressure in the first controller to later be transmitted to the second controller when in an ON state.

14. The method of claim 13 , comprising a step of waking a first controller after a first condition is met, and performing the commanding step after the waking step.

15. The method of claim 14 , wherein the first condition is fuel tank stabilization period.

16. The method of claim 13 , wherein the second controller is an engine controller configured to regulate operation of an internal combustion engine.

17. The method of claim 13 , wherein the evaporative emissions systems includes:

a housing;

the CVS is arranged within the housing and in fluid communication along a first fluid passageway between first and second ports, the CVS movable between open and closed positions;

the pump arranged within the housing and in fluid communication with the first and second ports;

a pressure sensor in fluid communication with at least one of the first and second ports, the pressure sensor configured to monitor the pressure; and

the first controller is arranged in the housing and in communication with the pump, the CVS and the pressure sensor.

18. The method of claim 17 , wherein the pump is arranged in fluid communication along a second fluid passageway between the first and second ports, the first and second fluid passageways are parallel to one another, and the pressure sensor is in fluid communication with at least one of the first and second fluid passageways.

19. The method of claim 18 , wherein the first port is a canister port configured to be fluidly connected to a charcoal canister, and the second port is an atmospheric port configured to provide substantially atmospheric pressure.

20. The method of claim 18 , comprising a CVS check arranged within the housing and in the second fluid passageway fluidly between the first port and the pump, the CVS check movable between open and closed positions, the first controller in communication with CVS check and configured to command the CVS check between its open and closed positions.