1 / 9

Evaporative Emissions from Small Engines

Evaporative Emissions from Small Engines. Harold Haskew July 2, 2003. Ethanol Fuel?. The test and certification procedures specify today’s automotive emission test fuel – no ethanol is allowed Is it your intent to update the fuel to an ethanol-containing fuel in the future?.

lora
Download Presentation

Evaporative Emissions from Small Engines

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Evaporative Emissionsfrom Small Engines Harold Haskew July 2, 2003

  2. Ethanol Fuel? • The test and certification procedures specify today’s automotive emission test fuel – no ethanol is allowed • Is it your intent to update the fuel to an ethanol-containing fuel in the future? From Evaporative Emissions from Off-Road Equipment (June 22, 2001)

  3. Permeation Requirements:a Changing Target • 2001-02 - Discussions indicating 3.0 g/M2/day (Variable Temp Test 65/105F) • 8/22/01 Harold Haskew • 8/02 Ron Sahu • 10/4/02 Ron Sahu • 11-13-02 Workshop - “1.0 g/M2/day for all … Equipment” (Variable Temperature Test 65/105F) • 12-18-02 (TP-901) - 40ºC Constant Temp Permeation (Doubles the stringency – but HH Only)

  4. 30 Day minimum Soak @ 72°F 65/105F CARB Diurnal Nylon Sulfonation

  5. Non Hand-Held Equipment • The earlier test procedures required Class 1 WBMs to pass a performance VT-SHED test (1.0 g/day), or a “Design Standard”, and have fuel tank permeation performance limit of 1.0 g/M2/day (65/105F Cycle) • The April 03 changes removed: 1) the “Design Standard” option for NHH equipment, and 2) the separate tank permeation requirement. • All Class 1 NHH equipment must now meet a 1.0 g/day VT-SHED performance standard.

  6. Durability Demonstration(TP-902 4/29/03) • 500 hours of direct sunlight exposure on the Cap and Tank • 3000 Pressure/vacuum cycles on the Tank (4 to -1 psig) • 5000 cycles on the valves, cables, and linkages • 1 million “slosh” cycles • If canister equipped, the canister must see: • Suitable fuel vapor cycling • 100 temperature cycles • 10 million vibration cycles at 60 hertz

  7. NHH Performance Requirement(TP-902 4/23/03) • Perform Durability Demonstration • Fill with Fuel and Operate for 5 minutes • Soak the tank and components for 140 or more days at 20-40C • Drain and fill to 50% with CA Phase 2 Test Fuel • Purge Carbon Canister (if so equipped) • Operate engine for 15 minutes • One hour hot soak • Soak at 65F for 2 hours • One 65-105-65F Diurnal Cycle in VT-SHED

  8. CARB’s Benchmarks(None meet the Current Procedures) • 6 Mowers with Phase 4 control systems (Avg = 0.89 g) April 25, 2002 Workshop (WBM-TestResults.xls) • ATL Tests on Mower 03 with Phase 4 controls (1.23 g) (preliminary-data-tables.xls) • WBM with Tank Pressure Relief Valves (1.07g @ 4 psi) (Report dated Sept 17, 2002) • Class 2 Equipment with Carbon Canister (Metal 6 gal Tank) (Report dated March 25, 2003)

  9. Summary • Evaporative control can be accomplished, given time, talent and resources for development, and a receptive market for the resulting product. • We are not aware of any data that exist today demonstrating that Class 1 or 2 equipment can comply with the proposed standards of 1.0 and 2.0 g/day.

More Related