Code of Federal Regulations Title 40. Protection of Environment 40 CFR Pt. 85, App. VIII—VEHICLE AND ENGINE PARAMETERS AND SPECIFICATIONS

A. LIGHT DUTY VEHICLE PARAMETERS AND SPECIFICATIONS

I. Basic Engine Parameters–Reciprocating Engines.

1. Compression ratio.

2. Cranking compression pressure.

3. Valves (intake and exhaust).

a. Head diameter dimension.

b. Valve lifter or actuator type and valve lash dimension.

4. Camshaft timing.

a. Valve opening (degrees BTDC).

b. Valve closing (degrees ATDC).

c. Valve overlap (inch-degrees).

II. Basic Engine Parameters—Rotary Engines.

1. Intake port(s).

a. Timing and overlap if exposed to the combustion chamber.

2. Exhaust port(s).

a. Timing and overlap if exposed to the combustion chamber.

3. Cranking compression pressure.

4. Compression ratio.

III. Air Inlet System.

1. Temperature control system calibration.

IV. Fuel System.

1. General.

a. Engine idle speed.

b. Engine idle mixture.

2. Carburetion.

a. Air-fuel flow calibration.

b. Transient enrichment system calibration.

c. Starting enrichment system calibration.

d. Altitude compensation system calibration.

e. Hot idle compensation system calibration.

3. Fuel injection.

a. Control parameters and calibration.

b. Fuel shutoff system calibration.

c. Starting enrichment system calibration.

d. Transient enrichment system calibration.

e. Air-fuel flow calibration.

f. Altitude compensation system calibration.

g. Operating pressure(s).

h. Injector timing calibrations.

V. Injection System.

1. Control parameters and calibration.

2. Initial timing setting.

3. Dwell setting.

4. Altitude compensation system calibration.

5. Spark plug voltage.

VI. Engine Cooling System.

1. Thermostat calibration.

VII. Exhaust Emission Control System.

1. Air injection system.

a. Control parameters and calibrations.

b. Pump flow rate.

2. EGR system.

a. Control parameters and calibrations.

b. EGR valve flow calibration.

3. Catalytic converter system.

a. Active surface area.

b. Volume of catalyst.

c. Conversion efficiency.

4. Backpressure.

VIII. Evaporative Emission Control System.

1. Control parameters and calibrations.

2. Fuel tank.

a. Pressure and vacuum relief settings.

IX. Crankcase Emission Control System.

1. Control parameters and calibrations.

2. Valve calibration.

X. Auxiliary Emission Control Devices (AECD).

1. Control parameters and calibrations.

2. Component calibration(s).

XI. Emission Control Related Warning Systems.

1. Control parameters and calibrations.

2. Component calibrations.

XII. Driveline Parameters.

1. Axle ratio(s).

B. HEAVY DUTY GASOLINE ENGINE PARAMETERS AND SPECIFICATIONS

I. Basic Engine Parameters.

1. Compression ratio.

2. Cranking compression pressure.

3. Supercharger/turbocharger calibration.

4. Valves (intake and exhaust).

a. Head diameter dimension.

b. Valve lifter or actuator type and valve lash dimension.

5. Camshaft timing.

a. Valve opening (degrees BTDC).

b. Valve closing (degrees ATDC).

c. Valve overlap (inch-degrees).

II. Air Inlet System.

1. Temperature control system calibration.

III. Fuel System.

1. General.

a. Engine idle speed.

b. Engine idle mixture.

2. Carburetion.

a. Air-fuel flow calibration.

b. Transient enrichment system calibration.

c. Starting enrichment system calibration.

d. Altitude compensation system calibration.

e. Hot idle compensation system calibration.

3. Fuel injection.

a. Control parameters and calibrations.

b. Fuel shutoff system calibration.

c. Starting enrichment system calibration.

d. Transient enrichment system calibration.

e. Air-fuel flow calibration.

f. Altitude compensation system calibration.

g. Operating pressure(s).

h. Injector timing calibration.

IV. Ignition System.

1. Control parameters and calibration.

2. Initial timing setting.

3. Dwell setting.

4. Altitude compensation system calibration.

5. Spark plug voltage.

V. Engine Cooling System.

1. Thermostat calibration.

VI. Exhaust Emission Control System.

1. Air injection system.

a. Control parameters and calibrations.

b. Pump flow rate.

2. EGR system.

a. Control parameters and calibrations.

b. EGR valve flow calibration.

3. Catalytic converter system.

a. Active surface area.

b. Volume of catalyst.

c. Conversion efficiency.

4. Backpressure.

VII. Evaporative Emission Control System.

1. Control parameters and calibrations.

2. Fuel tank.

a. Pressure and vacuum relief settings.

VIII. Crankcase Emission Control System.

1. Control parameters and calibrations.

2. Valve calibrations.

IX. Auxiliary Emission Control Devices (AECD).

1. Control parameters and calibrations.

2. Component calibrations.

X. Emission Control Related Warning Systems.

1. Control parameters and calibrations.

2. Component calibrations.

C. HEAVY DUTY DIESEL ENGINE PARAMETERS AND SPECIFICATIONS

I. Basic Engine Parameters–Four Stroke Cycle Reciprocating Engines.

1. Compression ratio.

2. Cranking compression pressure.

3. Supercharger/turbocharger calibration.

4. Valves (intake and exhaust).

a. Head diameter dimension.

b. Valve lifter or actuator type and valve lash dimension.

5. Camshaft timing.

a. Valve opening (degrees BTDC).

b. Valve closing (degrees ATDC).

c. Valve overlap (inch-degrees).

II. Basic Engine Parameters—Two–Stroke Cycle Reciprocating Engine.

1.–5. Same as Section C.I.

6. Intake port(s).

a. Timing in combustion cycle.

7. Exhaust port(s).

a. Timing in combustion cycle.

III. Air Inlet System.

1. Temperature control system calibration.

2. Maximum allowable air inlet restriction.

IV. Fuel System.

1. Fuel injection.

a. Control parameters and calibrations.

b. Transient enrichment system calibration.

c. Air-fuel flow calibration.

d. Altitude compensation system calibration.

e. Operating pressure(s).

f. Injector timing calibration.

V. Exhaust Emission Control System.

1. Maximum allowable backpressure.

VI. Crankcase Emission Control System.

1. Control parameters and calibrations.

2. Valve calibrations.

VII. Auxiliary Emission Control Devices (AECD).

1. Control parameters and calibrations.

2. Component calibration(s).