40 CFR § 86.1362 - Steady-state testing with a ramped-modal cycle.
---
identifier: "/us/cfr/t40/s86.1362"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 86.1362 - Steady-state testing with a ramped-modal cycle."
title_number: 40
title_name: "Protection of Environment"
section_number: "86.1362"
section_name: "Steady-state testing with a ramped-modal cycle."
chapter_name: "ENVIRONMENTAL PROTECTION AGENCY"
subchapter_number: "C"
subchapter_name: "AIR PROGRAMS"
part_number: "86"
part_name: "CONTROL OF EMISSIONS FROM NEW AND IN-USE HIGHWAY VEHICLES AND ENGINES"
positive_law: false
currency: "2026-03-24"
last_updated: "2026-03-24"
format_version: "1.1.0"
generator: "[email protected]"
authority: "42 U.S.C. 7401-7671q."
cfr_part: "86"
---
# 86.1362 Steady-state testing with a ramped-modal cycle.
(a) This section describes how to test engines under steady-state conditions. Perform ramped-modal testing as described in 40 CFR 1036.505 and 40 CFR part 1065, except as specified in this section.
(b) Measure emissions by testing the engine on a dynamometer with the following ramped-modal duty cycle to determine whether it meets the applicable steady-state emission standards in this part and 40 CFR part 1036:
[86 FR 34367, June 29, 2021, as amended at 88 FR 4476, Jan. 24, 2023]