Appendix I to Part 94 - Emission-Related Engine Parameters and Specifications
40:22.0.1.1.8.12.1.9.23 : Appendix I
Appendix I to Part 94 - Emission-Related Engine Parameters and
Specifications I. Basic Engine Parameters - Reciprocating Engines.
1. Compression ratio. 2. Type of air aspiration (natural, Roots
blown, supercharged, turbocharged). 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 - intake
exhaust (degrees from TDC or BDC). b. Valve closing - intake
exhaust (degrees from TDC or BDC). c. Valve overlap (degrees). 5.
Ports - two stroke engines (intake and/or exhaust). a. Flow area.
b. Opening timing (degrees from TDC or BDC). c. Closing timing
(degrees from TDC or BDC). II. Intake Air System. 1. Roots
blower/supercharger/turbocharger calibration. 2. Charge air
cooling. a. Type (air-to-air; air-to-liquid). b. Type of liquid
cooling (engine coolant, dedicated cooling system). c. Performance
(charge air delivery temperature (°F) at rated power and one other
power level under ambient conditions of 80 °F and 110 °F, and 3
minutes and 15 minutes after selecting rated power, and 3 minutes
and 5 minutes after selecting other power level). 3. Temperature
control system calibration. 4. Maximum allowable inlet air
restriction. III. Fuel System. 1. General. a. Engine idle speed. 2.
Fuel injection - compression ignition engines. 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. IV. Engine Cooling System. 1. Thermostat calibration.
V. Exhaust System. 1. Maximum allowable back pressure. 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. Crankcase
Emission Control System. 1. Control parameters and calibrations. 2.
Valve calibrations. VIII. Auxiliary Emission Control Devices
(AECD). 1. Control parameters and calibrations. 2. Component
calibration(s).