California Code of Regulations › Title 13 - Motor Vehicles › Division 3 - Air Resources Board › Chapter 1 - Motor Vehicle Pollution Control Devices › Article 2 - Approval of Motor Vehicle Pollution Control Devices (New Vehicles) › Section 1956.7 - Exhaust Emission Standards and Test Procedures-1981 Through 1986 Model Heavy-Duty Gasoline-Powered Engines and Vehicles and 1981 Through 1984 Model Heavy-Duty Diesel-Powered Engines and Vehicles

Current through Register 2024 Notice Reg. No. 28, July 12, 2024
(a) The exhaust emissions from new 1981
				  through 1986 model heavy-duty gasoline-powered engines and new 1981 through
				  1984 model heavy-duty diesel-powered engines, except engines used in
				  medium-duty vehicles, shall not exceed:
Primary Exhaust Emission Standards
								(grams per brake horsepower hour)
Model Year
Gasoline
							 or Diesel
							 Powered
Hydrocarbons
Carbon
							 Monoxide
Hydrocarbons Plus Oxides of
							 Nitrogen
1981-1983
Both
1.0
25
6.0
OR*
Both
--
25
5
1984
Both
0.5
25
4.5
1985-1986
Gasoline
0.5
25
4.5
Only
_______
* The two sets of standards for each model year are
					 alternatives. A manufacturer has the option for each engine family of showing
					 compliance with either set. Separate deterioration factors shall be
					 established, where applicable, for HC, CO, NOx, and/or the combined emissions
					 of HC and NOx.
The following optional exhaust emission standards are
					 applicable to engines tested pursuant to the optional federal test procedures
					 and regulations for 1984 model heavy-duty engines. These standards replace the
					 federal standards in Code of Federal Regulations Sections
					 86.084-10 and
					 86.084-11 for hydrocarbons, carbon
					 monoxide and oxides of nitrogen, only.**
Optional Exhaust Emission Standards
								(grams per brake horsepower hour)
Model
								Year
Hydrocarbons
Carbon
								Monoxide
Oxides of
								Nitrogen
1984
1.3
15.5
5.1
__________
** The federal 13-mode optional
					 standards for 1984 model-year diesel-powered engines do not apply. In addition,
					 the engine crankcase emission control requirement in Subparagraph
					 86.084-11(b)(2)(c) shall not apply for the 1984 model year.
(b) The test procedures for determining
				  compliance with 1981 standards are set forth in the "California Exhaust
				  Emission Standards and Test Procedures for 1981 Model Heavy-Duty Engines and
				  Vehicles," adopted April 23, 1980.
(c) The test procedures for determining
				  compliance with standards applicable to 1982 through 1986 models are set forth
				  in the "California Exhaust Emission Standards and Test Procedures for 1982
				  through 1986 Model Heavy-Duty Gasoline-Powered Engines and Vehicles and 1982
				  through 1984 Model Heavy-Duty Diesel-Powered Engines and Vehicles," adopted
				  October 5, 1976, as last amended April 25, 1986.
(d) A manufacturer may elect to certify
				  heavy-duty vehicles of less than 10,000 pounds maximum gross vehicle weight
				  rating as medium-duty vehicles under Section
				  1960.1 of this chapter, in which
				  event heavy-duty emission standards and test procedures shall not
				  apply.
(e)
(1) For 1982 through 1984, the executive
				  officer may authorize use of engines certified to meet federal emission
				  standards, or which are demonstrated to meet appropriate federal emission
				  standards, in up to a total of 100 heavy-duty vehicles in any one calendar year
				  when the executive officer has determined that no engine certified to meet
				  California emission standards exists which is suitable for use in the vehicles.
				  For 1985 and future years, the use of engines which are not heavy-duty engines
				  certified for sale in California may be authorized pursuant to Section
				  1956.8.
(2) In order to qualify for an exemption, the
				  vehicle manufacturer shall submit, in writing, to the executive officer the
				  justification for such exemption. The exemption request shall show that, due to
				  circumstances beyond the control of the vehicle manufacturer, California
				  certified engines are unavailable for use in the vehicle. The request shall
				  further show that redesign or discontinuation of the vehicle will result in
				  extreme cost penalties and disruption of business. In evaluating a request for
				  an exemption, the executive officer shall consider all relevant factors,
				  including the number of individual vehicles covered by the request and the
				  anti-competitive effect, if any, of granting the request. If a request is
				  denied, the executive officer shall state in writing the reasons for the
				  denial.
(3) In the event the
				  executive officer determines that an applicant may meet the criteria for an
				  exemption under this subsection, but that granting the exemption will, together
				  with previous exemptions granted, result in over 100 vehicles being permitted
				  under this subsection to use non-California engines in heavy-duty vehicles in
				  any one calendar year through 1984, the exemption may be granted only by the
				  state board, under the criteria set forth herein.