Midwest Research Institute

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Byron McCormick
5 years ago
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1 Midwest Research Institute Solutions through science and technology ANG Tank Design and Fuel Delivery System 7/20/05

2 Fuel Delivery System Requirements Integrate an ANG delivery system that still allows operation using CNG Electrical/Control Ability to operate on a 12V system Recognition of ANG tank operation Operational status feedback to driver indicating operation on CNG or ANG Storage of test data during operation (mileage, tank fill level, etc)

3 Mechanical Fuel Delivery System Requirements Manual fuel delivery shut off Margin of safety of on pressure vessel (i.e. operational pressure of 500 psi, design pressure of 2000 psi) Minimize weight of hardware Tank over-pressurization valves must be installed Integrated fuel delivery system shall be compatible with Honda Civic A guard bed will be incorporated for filtration of hydrocarbons and heavier gases

4 ANG Design CNG Approx. Usable Space Outline Fuel Filter (pre-existing) ANG Tank Tube Guard Bed ANG Tank Casing Guard Bed Heater Control

5 Assembly Specifications ANG Tank, Guard bed, casing to be made from Al 6061-T6 ANG Volume = L (9 gal) CNG Volume = 100 L (26. gal) Assuming 150 V/V for ANG, tank is depleted after ~2 miles Guard Bed Volume = 0.95 L (0.25 gal), % of ANG volume Total added assembly ~150 lbs

6 Test Fixture Thermocouple Pressure Relief Valve Pressure Transducer and Gauge Pressure Regulator Supply Tank (1,000 psi, 2.25 L) ANG Tank (500 psi, 0.5 L)

7 Fuel System Schematic CNG Tank Pressure Regulator 2 Pressure Regulator 1 Engine Fuel Rail and Fuel Injectors Intake Manifold

8 Basic Fuel and Electrical System Schematic Output Data Mileage Traveled Distance ANG Drain Time ANG Fill Time T Fuel valve P 600psi 500psi 600psi 19psi 19psi 7psi 500psi 7psi P T Fuel Injectors Mileage CNG T CNG P

Fuel and Electrical System Schematic Relief Valve

Line Reference Supplement page 11-29 For all black

are additions of ANG system Manual Shut Off Valve 1 2

Pressure Sensor Fuel Tank Temperature Sensor Fuel

9 Fuel and Electrical System Schematic Relief Valve Relief Line Fill Line P T 600psi 19psi 19psi 7psi Fill Line Reference Supplement page For all black lines and green insertions All insertions in orange are additions of ANG system Manual Shut Off Valve 1 2 G B Fuel Injectors Intake Manifold 1 2 Fuel Tank Pressure Sensor Fuel Tank Temperature Sensor Fuel Pressure Regulator Fuel Pressure Sensor Line Connection with on off valve

Fuel and Electrical System Schematic contd Relief Valve Relief

11-29 For all black lines and green insertions All insertions

Intake Manifold Fuel Tank Pressure Sensor Fuel Tank

Sensor Line Connection with on off valve Fuel temperature

computers and electrical wiring for current CNG system only On

10 Fuel and Electrical System Schematic contd Relief Valve Relief Line Fill Line G B 1 2 Fill Line P T Reference Supplement page For all black lines and green insertions All insertions in orange are additions of ANG system 2 1 Fuel Injectors Intake Manifold Fuel Tank Pressure Sensor Fuel Tank Temperature Sensor Fuel Pressure Regulator Fuel Pressure Sensor Line Connection with on off valve Fuel temperature Sensor Manifold Absolute Pressure (MAP) Sensor Blue includes computers and electrical wiring for current CNG system only On Off fuel tank fuel switch Injector Control Module (ICM) Powertrain Control Module (PCM)

Fuel and Electrical System Schematic contd Relief Valve Interior ANG Light Relief Line Fill Line G B 1 2 Fill Line P T Reference Supplement page 11-29 For all black lines and green insertions All

11 Fuel and Electrical System Schematic contd Relief Valve Interior ANG Light Relief Line Fill Line G B 1 2 Fill Line P T Reference Supplement page For all black lines and green insertions All insertions in orange are additions of ANG system On Off fuel tank fuel switch 1 2 Fuel Injectors Intake Manifold Fuel Tank Pressure Sensor Fuel Tank Temperature Sensor Fuel Pressure Regulator Fuel Pressure Sensor Line Connection with on off valve Fuel temperature Sensor Manifold Absolute Pressure (MAP) Sensor Blue includes computers and electrical wiring for current CNG system only Pink includes computers and electrical wiring for new ANG system only Injector Control Module (ICM) Powertrain Control Module (PCM)

Close ANG valve Run CNG and fill ANG ANG

travel distance Open ANG valve Close CNG

12 Computer Flow Chart Recognize On Ignition No ANG = 100psi or greater Check ANG tank Calculate ANG drain time and travel distance Turn off ANG Interior LED No Check ANG Tank ANG = 100psi or greater No Open CNG valve Close ANG valve Run CNG and fill ANG ANG = 500 psi Store ANG drain time and travel distance Open ANG valve Close CNG valve Turn on ANG Interior LED Calculate ANG fill time Store ANG fill time Check ANG Sensor s Pressure ANG sensor s Pressure OK No Open CNG valve Close ANG valve Run CNG Tank No Are Calculations Being performed Run ANG Tank Run ANG

Fig.11 Powertrain Control Module (PCM)

Fig.11 Powertrain Control Module (PCM) 2003 Dodge or Ram Truck Caravan V6-3.3L VIN R Vehicle > Powertrain Management > Relays and Modules - Powertrain Management > Relays and Modules - Computers and Control Systems > Engine Control Module >