Verified Technologies for smartway--EPA

无绪

Verified Technologies
EPA has evaluated the fuel saving benefits of various devices through grants, cooperative agreements, emissions and fuel economy testing, demonstration projects and technical literature review.  As a result, EPA has determined the following types of technologies provide fuel saving and/or emission reducing benefits when used properly in their designed applications:
' S% _) Q* j, d
/ P+ q+ f% @3 [. }4 J# {Idle Reduction Technologies
Aerodynamic Technologies
Low Rolling Resistance Tires
Retrofit Technologies
% H! Z; Z9 v! Q3 \! a" }
Within each of these categories, EPA has verified specific products.  These are listed below.  EPA continues to evaluate new products and add them to the lists.  Although EPA has verified the fuel saving and/or emission reducing benefits of the listed products, EPA does not endorse the purchase of products or services from any specific vendor.  EPA urges you to compare products, services, and prices before making your purchase.  For any product not listed below, EPA cannot confer its verification on that product.
; \$ Q* k5 B" ]* I8 E. _% {
General Grant Eligibility Note:  Equipment purchased with funds from National Clean Diesel Emission Reduction Program (DERA) grants must be on the SmartWay verified list (below) or verified diesel retrofit technologies list at the time of the acquisition to be eligible.  These lists are regularly updated as new products are verified.
( V& j9 o3 d& a% b
+ J4 P5 {" S8 I0 UCan I buy a truck that already comes with SmartWay technologies?
6 Y  C' s: B& T; E8 h* T8 ?
SmartWay Certified Tractors and Trailers are outfitted at the point of sale with SmartWay verified technologies and other fuel saving features.  The purchase of a SmartWay Certified Tractor or Trailer qualifies as a “vehicle replacement” for purposes of DERA grant eligibility.  

4 i( }6 W' X/ P" `- yHow can I request to have my product added as a verified technology?
/ |- V" C6 @  R
4 |0 F3 t3 {7 B! j9 SYou will need Adobe Reader to view some of the files on this page. See EPA's PDF page to learn more.
To request that EPA evaluate your product for inclusion on an EPA-verified technology list, send an email to SmartWay-tech@epa.gov for idle reduction technologies, aerodynamic technologies, and low rolling resistance tires. Interim guidance (PDF) (2 pp, 40K) and an interim test method (PDF) (2 pp, 42K) for verifying certain Smartway components (aerodynamic technologies and low rolling resistance tires) are now available online. For retrofit technologies, obtain a retrofit application packet retrofit application packet and submit it to CleanDiesel@epa.gov

( H! M' f, G6 d) p1 U( _4 s* X
4 ^1 j# U* w0 q0 d9 W* j/ `Verified Idle Reduction Technologies

( j0 h1 A8 y! Y5 QOver the past several years, EPA has evaluated idle reduction technologies/devices as part of grants, cooperative agreements, emissions testing, engineering analyses, modeling, demonstration projects and external peer reviewed reports to study the effects of idling on air quality, fuel consumption and driver health.  Based on this evaluation and research, EPA has determined that a variety of idle reduction technologies save fuel and reduce emissions when compared to idling the main engine.  
) ^; `/ u: G2 u. v
Idle reduction technology allows engine operators to refrain from long-duration idling of the main propulsion engine by using an alternative technology. An idle reduction technology is generally defined as the installation of a technology or device that:
7 `4 D1 I( a/ @0 @. }
is installed on a vehicle (e.g., bus, truck, locomotive, automobile, marine vessel, equipment, etc.) or at a location, and
reduces unnecessary main engine idling of the vehicle or equipment, and/or
! _* v4 }) B" J) A4 z; k7 {# xis designed to provide services (e.g., heat, air conditioning, and/or electricity) to the vehicle or equipment that would otherwise require the operation of the main drive engine while the vehicle or equipment is temporarily parked or remains stationary.
Certain idle reduction devices are now exempt from the federal excise tax when purchased with a new truck. For a list of idling reduction technologies eligible for the federal excise tax exemption, please see Federal Excise Tax Exemption.
, l. }) [7 v7 @2 e1 e0 T5 b$ d
To date, EPA has verified devices in the following categories of idle reduction technologies:

Electrified Parking Spaces (truck stop electrification)
  J) L& c/ |: w1 J( \Shore Connection Systems and Alternative Maritime Power
8 L2 R) W1 `" e1 d8 RShore Connection Systems for Locomotives
Auxiliary Power Units and Generator Sets
7 Y' \% F. m8 w2 ~+ E4 }( UFuel Operated Heaters
Battery Air Conditioning Systems
+ b6 z& u  e( f' |Thermal Storage Systems
! O) k7 y1 V" f7 s# QAutomatic Shut-down/ Start-Up Systems
0 L* |7 {5 w, _5 a: O& B2 eElectrified Parking Spaces (EPS)
/ _* X- f1 U+ V  B4 c: S$ d( X
An EPS system operates independently of the truck’s engine and allows the truck engine to be turned off as the EPS system supplies heating, cooling, and electrical power. The EPS system provides off-board electrical power to operate either:
; Q9 l9 i$ W8 G- X* F  n
% ]! p9 j! m! s7 G5 yan independent heating, cooling, and electrical power system, or
a truck-integrated heating and cooling system.
1 L% Z  f; @' K# W3 rIn both cases, the EPS system reduces main engine idling by providing an alternative source of energy which results in lower emissions than the main engine.
" _( {6 y: @. _1 ^  e' B2 ^$ ?4 O
SmartWay has verified technologies among the product lines of the following companies:
8 a# y2 ~0 L/ j1 b- y# \1 h
: k" @7 d, f2 j' pCabAire
% ]( f, E* P+ y, yCraufurd Manufacturing
EnviroDock
IdleAire Technologies Corporation
( l2 X. [1 k0 W: \$ a% S! GPhilips and Temro Industries
Shorepower™ Technologies
9 U3 K, w% Z. P5 dTeleflex, Inc.
Xantrex Technology & Cab Comfort
8 f, B8 H( G2 v7 C' u" x" c
6 r0 \# O0 s' X/ a3 ]% X8 ?Shore Connection Systems and Alternative Maritime Power (SCS/AMP)

! `8 O0 g6 H5 j2 d- B4 w5 D8 @- zAn SCS/AMP system allows maritime vessels to “plug into” an electrical power source instead of using its diesel auxiliary engines while at port. This system also includes various components such as cables, cable management systems, shore power coupler systems, distribution control systems, and power distribution.
, Q. s: x+ r( p6 k3 F- Y6 a' v
SmartWay has verified technologies among the product lines of the following company:

- D9 c( x! {6 m8 pSAM Electronics
Note on Shore Connection Baseline and Offsetting Emissions
0 e' |9 G5 u4 {' `6 ~$ F, e% q
Shore Connection Systems for Locomotives (SCS)
& P+ I+ X" r/ S' A1 M; M/ j
# Z& t( z! L( b- K& x0 y) }An SCS system allows locomotives to “plug into” an electrical power source instead of using its diesel engines while at the railyard.
0 W% v6 w1 b. @: u. u5 x
SmartWay has verified technologies among the product lines of the following company:

) m9 v' b3 f4 U" m# HKim Hotstart Manufacturing Company (Electric Driven Heating Systems)
7 o+ _+ [  e0 E7 i6 ]! LAuxiliary Power Units and Generator Sets (APU/GS)
/ K: I1 n  h9 S2 N9 C4 z
An APU/GS device contains an EPA emission-certified engine (certified under 40 CFR Part 89). APU/GS devices supply cooling, heating, and electrical power to Class 8 trucks and other applications. EPA has determined through its own test program that these devices reduce emissions on long-haul, Class 8 trucks and locomotives when compared to a truck’s baseline emissions from the main propulsion engine.
- b* q' |( n( e7 P  z$ D
# R6 b+ ^. f& b7 q/ S5 p8 d, lThe following APU/GS systems are SmartWay verified for long-haul, class 8 trucks:
+ i2 l& J. S+ b: w+ M0 ]$ e, E
Aux Generators Inc. - Idle Hawk
Auxilliary Power Dynamics, LLC
Black Rock Systems - Black Rock
Big Rig Products / Model: Nite Hawk
' {9 ~4 L0 M5 @Carrier Transicold - ComfortPro
Centramatic - Centramatic
& D2 R7 ^6 @, ~) L: U6 ?" KComfort Master - Comfort Master
* l) ?# m' t* ?( e) u4 UCummins - ComfortGuard
Cummins Onan - Quiet Diesel
Diamond Power Systems, LLC - Diamond Power System
Double Eagle Industries - Gen-Pac
2 b9 ~2 k+ v0 D1 a, {Dunamis Power Systems - Promax
Flying J Inc - Cab Comfort System
Frigette Truck Climate Systems - APU, Gen Set 1, Gen Set 2
) k+ e) B/ v& `7 g8 T6 }1 dGates Corporation - Cab Runner
Hodyon LP - Dynasys APU
Idle Solutions - Idle Solution
Idlebuster- Idlebuster
Kohler- 3APU, 7 APU
Life Force - Life Force
Kool-Gen - KG-1000
Mantis Metalworks, LLC - Model 175
, x: R% F9 N! W! T3 ^& g7 {  x5 `McMillan Electric Company / Model: IdleTime 4500-300
- X7 N; F! Y8 D0 M1 }3 c; ^3 eMcMillan Electric Company / Model: IdleTime 4500-400
$ p( s0 F. N) n* i" f$ `- A) L! }Mechron Power Systems - CCS Lightning Cab Comfort
Midwest Power Generators - MPG702
Navistar - Fleetrite APU, MaxxPower APU w/ HVAC
Navistar Fleetrite by Mobile Thermo Systems Inc./ Models: INTAPU146 and INTAPUT46
Parks Industries, LLC: Model Hp 2000
* G. R: B8 U( |Pony Pack, Inc. - Pony Pack
Power Technology Southeast - PowerPac
RigMaster Power by Mobile Thermo Systems Inc. / Model: MTS T4-6
: a3 f7 }! m2 I6 X% ~8 u! FStar Class - GEN-STAR 4500, GEN-STAR 6000
& b. j# a" U+ k1 i, Z( z; ^Stark Mfg.,LLC/Parks Industries,LLC - HP2000
. n; J9 @/ @" h! X5 i% J$ @1 dThermo King Corp. - TriPac
TRIDAKO Energy Systems - Power Cube
4 T4 `( j9 R* x5 h2 H: u7 `Truck Gen - UCT 2-5.5, UCT-APU
Volvo - 971-003/4 (optional 82A-B1X)
Willis Power Systems - Willis APU
) @$ o. h7 l4 b& H+ ~- C: \$ I8 @SmartWay has verified APU/GS systems for locomotives among the product lines of the following companies:

Kim Hotstart Manufacturing Company
9 S1 a  b; `; B+ rTeleflex Ecotrans L.P.
Fuel Operated Heaters (FOH)
3 J5 y# h' \6 R+ h
A FOH provides heat (only) by combusting fuel drawn from the main engine or other fuel system. EPA has determined through its own test program that these devices reduce emissions on long-haul, Class 8 trucks when compared to the truck’s baseline emissions. EPA has also determined that FOHs provide a similar idle reduction benefit when used on school buses and locomotives. In addition, the California Air Resources Board (CARB) has approved certain FOHs for compliance with applicable California emissions standards.
8 [( C) ~) _% [! x
; Z3 ?9 {# ^* r5 q4 zThe following FOHs are SmartWay verified for long-haul, class 8 trucks:
4 m* u4 {1 B% u1 R2 v5 Y
Automotive Climate Control - FFHD 2
Espar Heater Systems - D1LC, D3LC, Airtronic D2/D4, Hydronic 5/8/10/12
Teleflex - A2, A4, X45
3 y5 u0 s( t3 _Volvo - 41-11
Webasto - Air Top 2000, Air Top 3500, Thermo 90S
The following FOHs are SmartWay verified for school buses:
* k) U# J- q2 _" U$ l0 z* y) F
Espar Heater Systems - E-Guardian 5 (Hydronic D5)
+ |' t" e  ]* X- hEspar Heater Systems - E-Guardian 8 (Hydronic D8)
- k; L+ p0 b- b" \" }( {) HEspar Heater Systems - E-Guardian 10 (Hydronic D10)
Espar Heater Systems - E-Guardian 12 (Hydronic D12), and Airtronic D2, Airtronic D4, Airtronic D5
# ~! |6 G6 U4 xWebasto - TSL 17 (Thermo Top C/Z)
Webasto - Scholastic Heater (DBW 2010)
The following FOH systems are SmartWay  verified for locomotives:

9 ^  F# v1 j& C# H1 }. q3 D/ mA.S.T. Group -  35kW, 50kW and 90kW LTP Systems (includes automatic Start/Stop capability)

Battery Air Conditioning Systems (BAC)

A BAC system uses batteries to power an independent electric cooling system. Typically, these systems integrate a FOH to supply heating. EPA has evaluated BACs and finds that these
systems reduce emissions on long-haul, Class 8 trucks when compared to the truck’s baseline emissions.
  L* l; B! A3 o. ]0 d
) f. W; p) ?9 M& YThe following BAC systems are SmartWay verified:

% V, ?6 D8 d/ F) v2 z9 L5 ^# ?All Around Contracting LLC / Kool Rig System
) w- S- I' s+ D# g. z3 b  yAuraGen - Inverter/Charger System
Bergstrom, Inc - NITE
8 x+ m4 [1 {2 S- oCool Moves / Models: Bycool Mochila and Bycool Revolution
4 v. p5 S% A9 d, lCool Moves / Models: Minicool Compact and Minicool Dinamic
/ R* v7 Q5 B+ C2 [# O9 `Cool Moves - Rencool / Models: RDK4 and RTK5
2 L& M- j( h" _7 h8 V; ^, eDC Power Solutions - APU/AC System
Dometic Corp. - Sleeper AC
Driver Comfort System - Driver Comfort System
# \$ t3 D0 j0 _, xEnergyXtreme - PPEX60, PPEX80
2 H4 J% D1 u/ hFreightliner Cascadia - Park Smart System
Glacier Bay - ClimaCab
Hammond Air Conditioning, LTD - Artic Breeze
Idle Free Systems - Reefer Link System I
Indel B Sleeping Wel - Arctic 1000, Arctic 2000, Oblo
Kenworth Truck Co. - Kenworth Clean Power
Navistar/Bergstrom - 12V Aux No-Idle HVAC
Paddock Solar - Paddock Solar
Peterbilt - Comfort Class System
) n2 B& }& H' RSafer Corporation - VIESA
6 p4 N1 d, k: L- b  p9 Y3 ESun Power Technologies - Sleeper AC
Volvo - 971-001/2

Thermal Storage Systems (TSS)
" n3 m3 Y: R' Z( h. b5 ~
A TSS system stores energy in cold storage as the truck is driven, and then provides air conditioning when the truck is turned off. EPA has evaluated TSS and finds that these systems reduce emissions on Class 8 trucks when compared to the truck’s baseline emissions.
8 B7 V4 k1 i" |
- ]' W9 E2 h- p" t. q0 F9 \, fThe following TSSs are SmartWay verified:
; h/ q3 r0 t/ i5 G: _
# V1 h: p" P, k4 A. SAutotherm Division Enthal Systems, Inc. - T-2500 Energy Recovery System
8 R& V: F  P# W; f. h$ uWebasto - BlueCool Truck
2 e; k4 ~; p* s# ^) L" z. _9 ]Automatic Shut-down/ Start-Up Systems
" E+ h: Z+ V$ k' U; L, X
An automatic engine shut-down/start-up system not only turns off the main engine while idling but can re-start the engine when necessary.  Re-start of the main engine is typically based on a set time period, engine or ambient temperature, and other parameters (e.g., battery charge).  To date, SmartWay has only verified AESS systems for locomotives.

SmartWay has verified AESS systems for locomotives among the product lines of the following manufacturers.:
0 `9 F( G9 Z4 e4 f+ |; S
1 ]$ M& s( T2 Q9 X2 }, _Locomotives:
$ m3 P1 ?" K( [& H0 t
; r: `1 @: D5 ZGE Transportation
ZTR Control Systems/Kim Hotstart Manufacturing Company
top of page
8 x  G2 f7 s- Q) ^
" K7 K+ u4 `% M5 A
% E* K4 J8 B* s--------------------------------------------------------------------------------
( x: t9 p' d3 P" V& R, K+ c9 L
Verified Aerodynamic Technologies
$ J4 h# ?7 N# S8 c$ T2 RTrailer aerodynamic technologies can minimize aerodynamic drag and maintain smoother air flow over the entire tractor-trailer vehicle.  Trailer aerodynamic devices include gap fairings that reduce the gap between the tractor and the trailer to reduce turbulence, trailer side skirts that minimize wind under the trailer, and trailer rear fairings that reduce turbulence and pressure drop at the rear of the trailer.  EPA determined that using these trailer aerodynamic fairings in combination with one another (or, in a few cases, when used alone) have the potential to provide an estimated 5% or greater reduction in fuel use relative to the truck's baseline, when used in conjunction with an aerodynamic tractor on long haul class 8 trucks, in highway type operation. This reduces NOx emissions, saves over 800 gallons of fuel, and eliminates over 9 metric tons of greenhouse gas emissions per year.  Actual fuel savings depends upon the aerodynamic effectiveness demonstrated by each individual product, and truck operation.  To reduce NOx, greenhouse gases and improve fuel efficiency, legacy fleets can be retrofitted with aerodynamic trailer fairings, or the fairings can be provided as new equipment options.
: g7 |6 c* Z1 P4 a' B# r$ x
6 h! P, z, y6 BEPA has verified the following categories of aerodynamic technologies: Trailer Gap Reducer and Trailer side skirts (used in combination with one another); Trailer Boat Tail and Trailer Side Skirts (used in combination with one another); Advanced Trailer End Fairing; and, Advanced Trailer Skirt. In order to be eligible for funding under the DERA, verified aerodynamic technologies must be specifically listed on EPA’s verified technology list.

The following trailer aerodynamic technologies are SmartWay verified:

Trailer gap reducer (should be used with side skirts) - estimated fuel savings 1% or greater:
- d5 s) X8 \5 @0 U' |4 g6 Y4 rCarrier Transicold Gap Fairing
Nosecone "Nose 3-D" Gap reducer (consists of top and side units sold as one piece of equipment)
' n3 e0 L: a- o" Y9 fFreightWing gap reducer
/ D. C) j' L: wLaydon Composites gap reducer
4 y$ U6 ]0 A7 [Trailer Boat Tail (this or the gap reducer should be used with side skirts) — estimated fuel savings 1% or greater:
AeroVolution inflatable boat tail
4 l, D: D8 f4 G0 OTranstex rear trailer fairing
Aerodynamic Trailer Systems (ATS) dual lobe boat tail
  I2 M, q' T8 k/ i8 @Trailer Side Skirts (should be used with gap reducer or boat tail) — estimated fuel savings 4% or greater:
Carrier Transicold Belly Fairing
% b, k  E/ t3 A5 j9 K+ _, S
; [: Z0 }; L  [4 _Laydon Composites trailer skirts — 6 or 7 panel
Fleet Engineers Extended Air Slipper
: D5 |$ a; l. X! Y" i+ J9 sFreightWing belly fairing trailer skirts
5 \& t3 r. @* V5 c$ ]6 d! RRidge Corp. - GreenWing RAC0002
Silver Eagle Trailer Side Skirt, Mid-Length Skirt (MLS5)
& V/ @% q- a/ w% wTranstex trailer skirts
Utility Trailer -- Utility Side Skirt 120
Advanced Trailer End Fairing (this can be used with or without other fairings) — estimated fuel savings 5%:
ATDynamics TrailerTail rear trailer fairing
7 x- h; Y* P( z! h9 CAdvanced Trailer Skirt (this can be used with or without other fairings) — estimated fuel savings 5%:
ATDynamics-Transtex Trailer Side Skirts
. M  u/ c, S. @& MCarrier Transicold Aeroflex Fairing
/ Q1 k) v- N. Z( zFreightWing Aeroflex trailer skirt
) W- j+ j+ i) }7 l" rLaydon Composites trailer skirt — 8 panel
+ H3 k" @/ L; E! x4 v; l' O8 i7 hLaydon Composite Classic 7-Panel Trailerskirt, Product code TRSK700SA
Laydon Composite Hybrid 24 ft. Trailerskirt, Product code TRSK710SA
Ridge Corp. - GreenWing RAC0003
( p( f" C& F9 Y# ~' `Transtex MFS Trailer Side Skirts
! d1 l9 Q4 R+ |) ~5 {% B; \' W& R% JWabash National Advanced Trailer Side Skirt, DuraPlate AeroSkirt - Standard
Wabash National Advanced Trailer Side Skirt, DuraPlate AeroSkirt - Angled
Windyne Flex-Fairing
& k! H4 g) A3 `% mUtility Trailer -- Utility Side Skirt 160
top of page


* \& `9 R+ y4 A7 [! r4 L6 p4 `5 R7 ?! l--------------------------------------------------------------------------------

  x3 v- Y  t: L* _! o' ]Verified Low Rolling Resistance Tires
. G7 u0 i# J0 w9 J/ E' kBased upon data provided by tire manufacturers and EPA testing and research, EPA determined that certain tire models can provide a reduction in NOx emissions and an estimated fuel savings of 3% or greater, relative to the "best selling" new tires for line haul trucks, when used on all five axles on long haul class 8 trucks.  The options offered include both dual tires and single wide tires (single wide tires replace the double tire on each end of a drive or trailer axle, in effect turning an "18" wheeler into a "10" wheeler).  Low rolling resistance tires can be used with lower-weight aluminum wheels to further improve fuel savings.

To date, EPA has verified the following low rolling resistance tires.  In order to be eligible for funding under the DERA, verified low rolling resistance tires must be specifically listed on EPA’s verified technology list.

The following low rolling resistance tires are SmartWay verified when used on class 8, line-haul trucks:

Bridgestone
Steer    R287A, R280, R250F, R260F,
5 ^4 m3 ]* I% ~Drive    M720, Greatec
Trailer   R195, Greatec Trailer, Greatec R125, R197
BF Goodrich
/ y9 r+ ~2 e% d4 w5 o% |) iSteer   
) Q9 q4 @& ?7 I0 B4 SDrive   
+ H& J; o7 v) V! r1 H# uTrailer   TR144
Continental
) H8 M4 B. x0 M9 M5 YSteer    HSL-2 (replaces HSL)
  K. l& z- j4 a. R/ ?Drive    HDL Eco Plus, HDL2 DL Eco Plus
Trailer   HTL ECO PLUS, HTL1
+ Y% L" I' D' Y  w7 n/ v: gDunlop Tire
; c  g2 t6 v0 O: _/ X- K; ~  |Steer   SP384 FM
Drive   SP456 FM
; V8 m! v( g5 M  j" g+ ETrailer  SP193 FM
- Q9 h4 Y' x; f* {" [8 qFirestone
* j0 p8 n' g& b. K8 {Steer   FS590 PLUS, FS507
Drive    FD662
$ a! w; F& Z9 s6 M# DTrailer  FT455 PLUS
Goodyear
# O" Y0 o8 n- FSteer    G395 LHS Fuel Max, G399 Fuel Max, G662 Fuel Max
Drive    G305 LHD Fuel Max, G392 SSD, G305 Fuel Max AT
+ _% E" N) U' H2 y8 @, l0 JTrailer   G316 LHT Fuel Max, G316 Fuel Max DuraSeal
, e4 T1 i6 ]) WMichelin
) ^8 B+ @5 [* ]+ I; b) sSteer    XZA3, XZA2
Drive    XDA Energy, XDA3, X-One XDA, X-One XDN2
% A& H0 F. e8 U: U' LTrailer   XTA Energy, XT1, X-One XTA, X-ONE XTE
2 r; P+ o* x' R7 w3 ]2 n, `

' ?/ m& `  t0 [5 \- DToyo Tires

3 j3 h, G1 c9 B6 ~Steer    M137
" {: _( v2 e4 C; {4 @/ E( y5 S# }4 FDrive     M657
% g2 C' O7 l# I& M$ jTrailer   M127

2 c8 ?0 A. I* {Yokohama
Steer    RY617, 103ZR, 101ZL
Drive     703ZL, TY517mc2
7 @* H) Y) y# I' Y6 jTrailer   RY587mc2, RY587
Hankook
Steer    AL07+, AL11
Drive    Z35a, DL11
Trailer   TL01

无绪

基于轮胎厂和EPA测试研究提供的数据， EPA决定 对于可以减少热排放和节能3%或更多的轮胎花纹，作为5轴长途8级卡车的“畅销”并新轮胎。包括双胎并装和单个的宽轮胎（单个宽基轮胎在驱动或拖车的一端取代并装的双胎， 也使18轮改为10轮）。低滚动阻力轮胎可以用于轻的铝制轮辋来进一步节能。
: }" G' `: ^: `$ [5 S

# ~+ u) F8 {- Z---是为了查这个  与大家分享一下， 提高版块的人气  
. Q$ f7 P- P  X/ N, X$ |7 o现在这个可是比较时尚的，有翻译前面部分的 加分哦

hlx5536

也许是好东西，可惜它认得我，我认不得它啊:

无绪

滚动阻力系数的英文名称：Coefficient of Rolling Resistance   
3 ]3 W. W3 _; c, o
滚动阻力系数，是用来计算滚动阻力的一个系数。它是车轮滚动时所需的推力（即滚动阻力）与车轮载荷的比值。它的数值，是由试验测定的。实践表明，它与路面的种类、轮胎的构造、材料、轮胎压力及行驶车速都有密切的关系。

# W  e, X4 S3 J, F/ L良好的沥青及混凝土路面的滚动阻力系数最小，不到0.02。也就是说，车轮载荷为1000 N时，滚动时所需的推力（滚动阻力）只需要20 N。子午线轮胎、扁平轮胎、钢丝帘布轮胎的滚动阻力系数小。轮胎气压充足时的滚动阻力系数也小。

剑走偏锋

斑竹MM如此辛苦，顶起！可惜咱认识不了几个单词

姜平辉

资料应该是不错丶等待专业旳胶友给翻译下丶共同学习