Approval Details

Valid E.O.

Validity

This Executive Order approved the specified parts on on June 25, 1973.
As of Tuesday, March 25th, 2025 this Executive Order has not been overturned or superceeded.

Approved Parts

Models
1966-1973 model year vehicles

This Executive Order may be listed as:
  • C.A.R.B.E.O. D-12
  • Executive Order 12 / D12
  • ARB # D-12
  • Executive Order No: D-12
  • C.A.R.B. No. D-12
  • Resolution D-12
For Free CARB Executive Order Status verification, email an image of the device Executive Order label as well as the Year/Make/Model and Test Group # of the vehicle to [email protected]

Download: Executive Order D-12 PDF

D-12 Document:

CARB_D-12

State of California AIR RESOURCES BOARD EXECUTIVE ORDER D—12 Relating to Exemptions under Section 27156 of the Vehicle Code CLYTRONICS CORPORATION "CLYTRON® Pursuant to the authority vested in the Air Resources Board by Section 27156 of the Vehicle Code; and Pursuant to the authority vested in the undersigned by Section 39023 of the Health and Safety Code; . IT IS ORDERED AND RESOLVED: That the installation of a "CLYTRON" capacitive discharge ignition system manufactured by Clytronics Cor— poration has been found to not reduce the effectiveness of required emission control devices in vehicles and therefore is exempt from the prohibitions of Section 27156 of the Vehicle Code for 1966—1973 model—year vehicles. The device consists of a sensor, d—c to d—c converter, storage capacitor, electronic switch and transformer. ‘ This Executive Order is valid provided that installation instructions for this device will not recommend tuning the vehicle to specifications different than those listed by the vehicle manufacturer. THIS EXECUTIVE ORDER DOES NOT CONSTITUTE A CERTIFICATION, ACCREDITATION, APPROVAL, OR ANY OTHER TYPE OF ENDORSEMENT BY THE AIR RESOURCES BOARD OF ANY CLAIMS OP THE APPLICANT CONCERNING ANTI—POLLUTION BENEFITS OR ANY ALLEGED BENEFITS OF THE "CLYTRON® DEViCE,. No claim of any kind, such as "Approved by Air Resources Board" may be made with respect to the action taken herein in any advertising or other oral or written communication. Section 17500 of the Business and Professions Code makes unlawful, untrue or misleading advertising and Section 17534 makes violation punishable as a misdemeanor. Section 39130 and 391864 of the Health and Safety Code provide as follows: "32130. No person shall install, sell, offer for sale, or advertise, or, except in an application to the boeard for certification of a device, represent, any device as a motor vehicle pollution control device unless that device has been certified by the board. No person shall sell, offer for sale, adver e, or represent any motor vehicle pollution control device as a certified device which, in fact, is not a certified device. Any violation of this section is a misdemeanor."

EXECUTIVE ORDER D12 "CLYTRON® "39184. No person shall install, sell, offer for sale, or advertise, or, except in an application to the board for accreditation of a device, represent, any device as a motor vehicle pollution control device for use on any used motor vehicle unless that device has been accredited by the board. No person shall sell, offer for sale, adver— tise, or represent any motor vehicle poliution control device as an accredited device. Any violation of this section is a misdemeanor." ABny apparent viclation of the policy or laws will be submitted to the Attorney General of California for such action as he deems advisable. Executed at Sacramento, California, this é@f? day of June, 1973. JOHN A. MAGA Executive Officer w.

State of Califormia AIR RESOURCES BOARD May 25, 1973 Staff Report Evaluation of Clytronics Corporation "Clytron" Breakeriless Capacitive Discharge Ignition System for Exemption to the Prohibitions of Section 27156 of the Motor Vehicie Code Clytrontcs Corporation, Coloradoa Springs, Colorado, hes applied for exemption to the prohibitions of Section 27156 of the Motor Yehicle Code for the "CLYTRON® breakerless cépacitive discharge ignition system. Section 27156 prohibits the installation df a device that reduces the effectiveness of motor vehicle emission control systems. The applicant intends to sell the device as an "after—market" part to replace the standard ignition system. The Air Resources Board has adopted criteria for the evaluation of "after—market" devices for compliance with Section 27156. The basis for evaluation is defined in the "Air Resources Board Criteria for Determining Compliance with Section 27156 of the Motor Vehicle Code", dated February 17, 39717 11. System Description For a general description of a breakerless capacitive discharge system, see staff report "Evaluation of Capacitive Discharge and Transistorized Ignition Systems for Compliance with the Requirements of Section 27156 of the Motor ¥ehicle Code", dated February 14. 1973.

"Clytron" ‘ May 25, 1973 The "CLYTRON" device consists of three major components: a sensor, power unit and.transformer {electrical schematic attached). The sensor is a photocell mounted on the distributor plate triggered by an interrupting light source. The interrupter is slotted skirt rotor cap fastened to the distributor shaft to furnish proper engine timing. The voltage generated in the sensing unit is fed into a capacitive discharge ignition system to a trigger circuit which dis— charge the storage capacitor into the primary windings of the output transformer. The capacitive discharge circuit consists of a converter circuit, storage capacitor and an electronic switching circuit. The output transformer is of a specific turns ratio with secondary output voltage of 24000 volts. III. Emisston Testing The "CLYTRON" device was tested by the Air Resources Board Laboratory. The following vehicle was tested: 1} 1973 Mercury Comet — 302 CID V—8, 2 8b1., automatic transmission and EGR. The engine was adjusted to vehicle manufacturer‘s specifications for spark plug gap, timing, dwell, idle CO and idle RPM. It was verified that the ignition system was operating satisfactorily.

"Clytron" May 25, 1973 The test resuits are as follows: Exhaust Emissions Vehicle Device Hot CVS ____ HC CO NO gm/mi gm/mi gm/mi 1973 Mercury Comet No 1.37 15.35 1.52 1973 Mercury Comet Yes 1,42 14.60 1.61 Coil Output Volitage Vehicle Closed Circuit Open Circuit and RPM Baseline With bevice Baseline With Device 1973 Mercury Comet Idle 12,000 14,000 28,000 22,000 3,000 RPM 8,000 12,000 26,000 34 ,000 The test data indicate that the device does not produce significant changes in exhaust emissions. The coil output voltages are as expected. Hy. Conclusions and Recommendations It ts the staff opinion that Clytronics Corporation "Clytron" breakerless capacitive discharge ignition system will not adversely affect the—per— formance of the motor vehicle emission control system when evaluated with respect to a conventional ignition system of a "tuned" engine. This device may also have a beneficial effect in the control of vehicle emissions in that the device may maintain the "tuned" condition for a longer period of time. Therefore, the "Clytron" breakerless capacitive discharge ignftion system should be exempt from the prohibitions of Section 27156 of the Motor Vehicle Code.

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Document Created: 2005-09-01 12:40:32
Document Modified: 2005-09-01 12:40:32

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