 鲜花( 1181)  鸡蛋( 48)
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原帖由 shark27 于 2008-10-4 17:23 发表  ! g. V. @6 i! ?( E) Q
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2 b; R. S. [1 W" |本人YY了一些什么呢？ 请赐教！
! w' r6 ?# y$ ~5 E8 j0 z" S讲BOF就是要flexible才能装货。如果BOF比较rigid就有断裂的危险。
1 v. z* H- Y U% t3 q什么是flexible？就是rigidity比较低。这二者是反义词。* M$ p' u$ l5 ?6 m1 G
举个例子把，把同样尺寸的汽车骨架A和B放到机器上扭。如果同样施加10000牛顿，A扭曲了1度，B扭曲了2度，那么A就比B rigid，B就比A flexible.你所说的“再flexible的BOF也比再rigid的unibody要rigid”注定是错的。* G" `7 Z. `$ l" o6 o
1 b+ V$ N) ?# A7 G& U$ }4 ]我曾经诚恳的跟你讲，思而不学则殆。看得出你思考了，但很遗憾你缺少学习。) @* n( o0 M0 v
没有基础知识支持的思考，就是YY了。
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你的YY的本质是你以为 Rigidity 是个褒义词，你喜欢BOF车，所以以为BOF肯定rigid。其实这是个中性词，BOF是故意的要降低rigidity，已达到载货目的的。' ~% @7 G. c3 Q3 J( q
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这方面的讨论再网上不是很多，我找了这2篇东西，你看一看：) D9 d3 s3 H ?- Q* H& J
1） http://newcarbuyingguide.com/index.php/news/main/625/event=view
3 b3 ?/ F4 w- C9 P9 |' X+ mTorsional Rigidity1 T# _! V* m% T" k$ x6 z. C
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Sometimes called chassis stiffness. It relates to how rigid the chassis is in twisting. Imagine a sport utility vehicle that needs to climb over rocks. Those without long suspension movements sometimes have lower torsional rigidity to allow the chassis to respond to uneven ground. A passenger car, on the other hand, should have high torsional rigidity in order to give the car a smooth ride, less vibration and better handling. Sports and performance cars are usually the stiffest in order to minimize any flex except for that offered by the springs and shocks to obtain consistent handling./ L" c4 y& p7 M, K- ?# C
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2）http://wardsautoworld.com/ar/auto_fullsize_ambition/' p" k! `, [# D2 U# p& p( w% i8 } d
这一部分是介绍 Honda Ridgeline的，这是唯一的 unibody pickup。比同级别BOF pickup的 rigidity 强的多（红字）。6 L/ \9 b: ~- B2 @( M" K
这个例子把你的“再flexible的BOF也比再rigid的unibody要rigid”驳的体无完肤。
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0 I7 }" x3 @5 y* ^' SFullsize Ambition1 b" d$ a$ H) X, R0 v
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Pickup truck buyers are a peculiar breed.
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They beat up their 4-wheelers and relish the ability to haul campers and load the bed with tools, woodchips and appliances. They love their trucks to death — literally, driving them into the ground, dropping bits of rusted body panels along the way.) \# u8 `1 M, t
5 H5 M+ N1 X: K7 x: u6 G& R( E% B, hOnly in the last decade have people begun buying pickups not for functionality or commercial reasons but because pickups, like SUVs, afford a sense of security with high-up “command seating” and — with the advent of 4-door crew cabs — more than ample cabin room for families of all sizes. The truck bed rarely sees use.
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4 [8 J0 d/ m- K1 B& AIn this new dynamic, Honda Motor Co. Ltd. sees an opportunity to sell America the pickup it really wants — one that handles like a car, has the amenities of a luxury sedan, requires no ladder to climb in, offers clever storage compartments, strikes an athletic pose and doesn't need a hulking, gas-guzzling V-8 to haul a 22-ft. (6.7-m) boat.
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% O- S' t' c: a7 M; {+ eThe all-new '06 Ridgeline pickup, which Honda assembles in Alliston, Ont., Canada, and will arrive in showrooms this month, is all of the above. Honda's knack for impeccable execution is apparent with the Ridgeline, even though the company has never before produced a pickup.
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In preparation for this important launch, Honda cut its teeth with its previous truck-like models, such as the Acura MDX and Honda Pilot cross/utility vehicles and Odyssey minivan. The Ridgeline shares its basic architecture with those vehicles, although Honda says its engineers poured so much work into the pickup that its chassis is 93% unique.
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Structurally, the Ridgeline is remarkable. Its closed-box ladder frame with seven cross members looks a lot like the bottom structure of a typical body-on-frame pickup. But the body itself is designed like that of a car, using contemporary unibody construction. Honda refers to it as “heavy-duty unibody” for its trailering capability.! K& x" |$ M# j7 c+ k
6 H$ J. U3 _8 MChassis and body engineers may argue whether the Ridgeline is a pickup or a car. Perhaps it's a little of both.! a B N, w9 b1 L' z
; G7 x5 r0 p2 d/ Z+ S* T4 |# {8 oThe Ridgeline handles like a car — an agile one at that. During a test drive on a hilly, winding road in Southern California, the Ridgeline remained buttoned to the pavement, with minimal body roll compared with typical body-on-frame pickups.
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The unique construction is directly responsible, Honda says. In conventional pickups, the cabin is isolated from the bed, which is bolted directly to the frame. As a result, the cabin generally goes around corners more smoothly than the back end.7 K' Y/ t4 a4 A
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The Ridgeline's bed and cabin are unitized, however, so stability is greatly enhanced. Honda says the Ridgeline's bending rigidity is 2.5 times firmer than the best compact pickup, and the rear torsional rigidity is more than 20 times stiffer.4 e9 w! o, t6 }0 S: x
4 f& _& k% y% }0 m; N% h# t Y5 E3 YThe independent rear suspension also contributes to Ridgeline's agreeable road manners. Honda insisted on an IRS for the Ridgeline because the solid axle/leaf-spring combination on conventional pickups compromises handling.5 Y/ T* z) u; x5 u u3 p- L
, c8 {2 @$ o2 Z" ?The Ridgeline will be classified a small pickup, competing with the Dodge Dakota, Toyota Tacoma, Ford Explorer Sport Trac, Nissan Frontier and Chevy Colorado in a segment that continues to shrink, despite efforts by OEMs to bill them as midsize.: M. D8 S3 a3 M: `4 }
r& B5 d( @6 rCount Honda among those auto makers attempting to sell fullsize capability from a small, more fuel-efficient package. Honda marketers and engineers have ambitious goals for their first-ever pickup and even invoke the Ford F-150 (the world's best-selling pickup) as a competitive benchmark.
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Honda says the Ridgeline's payload rating of 1,522 lbs. (690 kg) exceeds that of the F-150 Crew Cab, with a payload rating of 1,459 lbs. (661 kg).
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. {8 C+ a, B' [: V& n8 O8 I1 YIn test drives, journalists drove both the Ridgeline and F-150, hauling an 18-ft. (5.4-m), 5,000-lb. (2,268 kg) box trailer filled with gravel. The Ridgeline's towing capacity is 5,000 lbs., compared with 9,200 lbs. (4,173 kg) for the F-150. The oval course traversed undulating pavement and allowed for a few full-acceleration straightaways.+ x9 B9 g4 m/ C: h1 q, h
% [. e/ e( P6 G- ~, K) d! Z) ~The F-150, with its 300-hp 5.4L V-8, clearly had more low-end grunt. The Ridgeline's 255-hp 3.5L V-6, mated to a 5-speed automatic transmission, was capable enough, but its tugging ability is not in the same league as the V-8 F-150.
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Honda says it does not intend for the Ridgeline to face the F-150 head on, only to demonstrate that for most pickup duties, the Ridgeline can get the job done. Honda says the pickup can pull a 22-ft. boat and a 24-ft. (7.3-m) camper with no problem. The company says its research reveals 84% of pickup customers tow less than 5,000 lbs.
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“I'm not saying we can beat that F-150,” Gary Flint, chief engineer for the Ridgeline, tells Ward's. “All I'm demonstrating is that I can pull that trailer. The Ridgeline can hold its own.”& n, G% c1 q9 G- I/ b% ~+ y
2 l4 g6 d% a2 z( F9 t" Z+ UAlthough the Ridgeline's 252 lb.-ft. (341 Nm) of torque is grossly outmatched by the F-150 V-8, Flint says after the first four seconds of acceleration, most drivers barely will notice a difference between the Ridgeline's V-6 and Ford's V-8.
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But on paper, the Ridgeline V-6 isn't even the most powerful among compact pickups. The all-new 4L V-6 in the Nissan Frontier, for instance, produces 265 hp and 284 lb.-ft. (385 Nm) of torque, and the Toyota Tacoma's 4L V-6 makes 282 lb.-ft. (382 Nm) of torque.
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Like most small pickups, the Ridgeline's fuel economy is disappointing, rated at 16 mpg (14.6 L/100 km) in the city and 21 mpg (11 L/100 km) on the highway.; y/ T$ e$ w4 N' o4 ]
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That's not to say the Ridgeline is uncompetitive. Every maker of small pickups is bound to lose sales to the Ridgeline because the package is undeniably unique, clever, attractive and well conceived.; Y: ?! n: |+ F$ h) {1 i) m' F
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Patents are pending for the ingenious pickup bed, which includes a trunk accessed through the floor. A handle on the lid allows the In-Bed trunk to be locked with a key, adding 8.5 cu. ft. (240L) of secure storage space — large enough for three golf bags.2 J/ @1 j+ g. h8 s$ H2 T; d
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The steel-reinforced composite bed is lightweight, resists corrosion and holds up well when more than 800 lbs. (362 kg) of rocks are dropped in with a front-end loader, a stunt held during the preview. The bed showed scuffs, but no dents.; y5 |) v5 B& b" F9 P2 H! H
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Honda has the advantage of selling dirt bikes (two of which fit in the bed), all-terrain vehicles, jet skis, generators and lawn mowers. The company has more than 5 million customers for motorcycles and power equipment. Surely some of them, the company theorizes, will consider the Ridgeline.
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Honda rates the pickup's off-road capability as “medium duty,” and it performed well on steep, rocky grades. Its Variable Torque Management 4-wheel-drive system, similar to that in the Acura MDX, is fully automatic. In most cruising conditions, the system is in front-wheel-drive mode.( z# \: x, y2 D
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The system is intelligent enough to engage all-wheel drive for better maneuverability even before wheel slippage occurs. A locking differential button on the instrument panel channels maximum torque to the rear wheels until the vehicle reaches 6 mph (10 km/h), at which time the rear torque is gradually diminished.
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. V, [- L6 f" O2 hInside, the Ridgeline is comfortable and well appointed. The vehicle will come in three trim levels — RT, RTS and RTL. Even the base RT has an impressive list of standard features, including keyless remote entry, side and curtain airbags, power locks, power windows and front bucket seats.0 H$ ~' Q+ W- y
# ~# o; d: t; e0 vAlso standard is a nifty automatic heated wiper zone that speeds defrosting on cold, snowy days. When the temperature drops below 39° F (17° C), the windshield is automatically heated with electric defrost lines situated beneath the wipers." b4 s" u6 b0 j1 @
% [9 l/ w/ |! ~The Ridgeline will start at $28,215 for the base RT and top off at $35,155 for the premium RTL, including XM satellite radio, navigation system and moonroof.0 P1 D3 N% X8 I! v+ @5 Z; x7 d
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The Ridgeline is an impressive pickup, and Honda has set what should be an easily attainable goal of selling 50,000 units annually. Despite the relatively small number, there's nothing pintsized about Honda's expectations for the Ridgeline.1 R2 q( p# i8 s1 F+ G4 T2 v
'06 Honda Ridgeline RTL: e* @- a5 ?% W4 p. ~
6 B% V& O7 _; I7 w+ MVehicle type: Front-engine, all-wheel drive, 5-passenger 4-door pickup
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Engine: 3.5L (3,471 cc) SOHC V-6, aluminum block/aluminum heads' v5 U) r6 n% m m
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Power (SAE net): 255 hp @ 5,750 rpm) {' f5 Y- A0 z* e/ L# ^2 I
. u+ A1 q; _& k: `# lTorque: 252 lb.-ft. (342 Nm) @ 4,500 rpm
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Compression ratio: 10:1
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6 b2 {' _4 U0 k, A: g6 T# SBore × stroke (mm): 89 × 93
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9 u7 N+ Q5 _6 {1 O- U/ q# gTransmission: 5-speed automatic" s2 [4 l2 Z8 Y5 q k% b1 t4 }
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Wheelbase: 122 ins. (310 cm)* S3 Q( r5 w. ~+ R& I( M
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Overall length: 206.8 ins. (525 cm)7 R$ V1 ] |4 I
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Overall width: 76.3 ins. (194 cm)0 i( y# X; }' q: l! k" V8 q
& q) x5 R/ a- w1 I$ `2 _Overall height: 70.3 ins. (179 cm)) ^9 w8 V3 c# a! o3 u# c" y
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Curb weight: 4,498 lbs. (2,041 kg)( R4 P; ]8 M, U3 F1 {
$ C+ B# \/ m" g3 p( hEPA fuel economy, city/highway (mpg): 16/21/ P& [4 S8 O( L+ l# ` B0 S; @/ I
# Z; |$ o: {; I' T& `Direct competition: Chevrolet Colorado; Dodge Dakota; Ford Explorer Sport Trac; Nissan Frontier; Toyota Tacoma
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[ 本帖最后由 小黄 于 2008-10-6 12:51 编辑 ] |
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楼主: yxia
狗仔卡
发表于 2008-9-26 15:26
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发表于 2008-10-9 21:35
