Defeat Device

{
  "id": "MLC-T-ENV-007503",
  "term": "Defeat Device",
  "field": "Environment",
  "definition": "1. AECD or other control feature that reduces the effectiveness of the emission control system under conditions which may reasonably be expected to be encountered in normal locomotive operation and use, unless the AECD or other control feature has been identified by the certifying manufacturer or remanufacturer in the application for certification, and:(1) Such conditions are substantially represented by the portion of the federal test procedure during which the applicable emission rates are measured;(2) The need for the AECD is justified in terms of protecting the locomotive or locomotive engine against damage or accident; or(3) The AECD does not go beyond the requirements of engine starting.\n\n2. AECD or other control feature that reduces the effectiveness of the emission control system under conditions which may reasonably be expected to be encountered in normal engine operation and use, unless the AECD or other control feature has been identified by the manufacturer in the application for certification, and: (1) Such conditions are substantially represented by the portion of the applicable duty cycle of § 94.105 during which the applicable emission rates are measured; (2) The need for the AECD or other control feature is justified in terms of protecting the engine or vessel against damage or accident; or (3) The AECD or other control feature does not go beyond the requirements of engine starting.\n\n3. Meaning given in the standard-setting part.\n\n4. AECD that reduces the effectiveness of the emission control system under conditions which may reasonably be expected to be encountered in normal urban vehicle operation and use, unless (1) such conditions are substantially included in the Federal emission test procedure, (2) the need for the AECD is justified in terms of protecting the vehicle against damage or accident, or (3) the AECD does not go beyond the requirements of engine starting. [40 CFR 86.082-2 (CFR 2018)\n\n5. Auxilary emission control device (AECD) that reduces the effectiveness of the emission control system under conditions which may reasonably be expected to be encountered in normal vehicle operation and use, unless: (1) Such conditions are substantially included in the Federal emission test procedure; (2) The need for the AECD is justified in terms of protecting the vehicle against damage or accident; or (3) The AECD does not go beyond the requirements of engine starting.\n\n6. Auxiliary emission control device (AECD) that reduces the effectiveness of the emission control system under conditions which may reasonably be expected to be encountered in normal vehicle operation and use, unless: (1) Such conditions are substantially included in the Federal emission test procedure; (2) The need for the AECD is justified in terms of protecting the vehicle against damage or accident; (3) The AECD does not go beyond the requirements of engine starting; or (4) The AECD applies only for emergency vehicles and the need is justified in terms of preventing the vehicle from losing speed, torque, or power due to abnormal conditions of the emission control system, or in terms of preventing such abnormal conditions from occurring, during operation related to emergency response. Examples of such abnormal conditions may include excessive exhaust backpressure from an overloaded particulate trap, and running out of diesel exhaust fluid for engines that rely on urea-based selective catalytic reduction.",
  "references": [
    "40 CFR 92.2 (CFR 2013)",
    "40 CFR 94.2 (CFR 2013)",
    "40 CFR 1068.30 (CFR 2013)",
    "EPA EV-Environmental Technologies-Control Technologies",
    "40 CFR 86.094-2 (CFR 2018)",
    "40 CFR 86.1803-01 (CFR 2018)"
  ],
  "url": "https://mlchart.com/terminology/environment/defeat-device/"
}