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Show AUTOMOTIVE E-2 The Salt Lake Tribune 1999 Isuzu Trooper S—an Friday, June 25, 1999 SUV built for pikes, peaks of a dashboard-mounted, signallight-indicating power flow between the front and rear wheels. BY WARREN BROWN (C) 1999, THE WASHINGTON PosT Photographers are fond of showing the Isuzu Trooper at the edge of a waterfall, or atop a mountain. The idea is to display the vehicle as both a conqueror and friend of nature — the truck as noble savage. edge ofanythingis the end ofa shop- age, the vehicle can do everything its manufacturer says it can do. It can ford shallow streams, roll unencumbered through moderate-to-heavy snowfalls, crawl through mud and climb mountain paths designated for off-road motoring. But who does those things in a $30,000 vehicle that often serves as the mainfamily transport? Answer Q. The gentleman from Des | Plaines ‘ll.) didn't say he had | an M-2 carbine, but that he | was issued one in Korea, where | awar wasfought that I wouldntt expect you to know about. | Whatthe world needs is 70 mit- | from the still-soaring sport-utility sales, they seem to havea point. finest, aware of their rights, | wrongin this; and, certainly, judging ping mall parking lot. Andthe only mountains ever climbed by manyis a steep, gravel driveway to a cottage in the woods. None of that under-use is the Trooper's fault, of course. As the realities of the urban/suburban driving environments and trip pattems of many four-wheel-drive sport-utes, Automotive marketers say that I'm minivan would do just as well, given Butreal Trooperlife is less poetic. The closest most Troopers get to the demonstrated by the tested 1999 Isuzu Trooper S/Performance Pack- By Jim MATEJA CHICAGO TRIBUNE Yet, I believe that a rear-wheel- drive truck or front-wheel-drive lion plus more card-carrying NRA ready WhatI don’t understand, according to the marketers. is the notion of Mr sieaacaommemnestd ¥ AY5 The Isuzu Trooper S/Performance Package features a VergeOnE Darna four-wheel-drive system. Not many people who arepaying the Borg-Warner Automotivein associa- in tight comering. It also provides tion withIsuzu. monthly note. improved traction and stability on That raises a question about Using an electronically controlled, dry, or wet pavedroads. whether the Trooper and similar lubed, multi-plate clutch, TOD conFully engaging the multi-plate sport-utility models are over-engitrols the distribution of driving force clutch turnsthe Trooperintoa directneered for actual use. Look, for between the front and rear wheels, drive, four-wheel-drive vehicle for example, at the new Trooper's That helps to eliminate the wheel- traveling off-road or traversing Torque-On-Demand (TOD) four- scrub sensation exhibited by some wheel-drive system, developed by mush. It’s all pretty neat stuff, andall rather seamless, with the exception four-wheel-drive sport-utility models use” — that is, having more than you need just in case you wind up needingit. Say, for example,there washed-out road in a spring rain- By AL Haas KNIGHT RIDDER NewSparers Many women don’t knowanything about ones I talk to don’t know much more about how a car worksthan their wives do, but are genetically incapable of admitting it. They wouldratherstick pins in their eyes than wade into those wimpy waters. four cycles, or strokes, to make power. In the first, or intake stroke, the piston tnoves downward in the cylinder as the intake valve opens compression ratio gets higher, the engine to admit the fuel/air mixture. line to prevent harmful premature ignition of same amount of gas. Thetrade-off is that asthe requiresa moreexpensive,higher-octane gaso- The piston’s downward motion creates a vacuum in the cylinderthat sucksin the fuel/air charge. Then,thepiston comesback upon the com: pression stroke, squeezing the fuel/air into a thefuel mixture is then ignited by the spark plug. and more enginesize and power. Your engine probably has four, six or eight cylinders. The more cylinders it has, the overcomebythe urge to park your Trooperat the edge of a waterfall, or atop a mountain. It’s a peace-of-mindthing: and as. long as people wantit andare willing to pay for it in a free market, the Trooper and other four-wheel-drive trucks will rule. Q. Which agency canreview a safety feature that can be added to all motor vehicles newandused? I have a simple idea that could deter injury to pedestrians and vehicles and wouldlike to have it reviewed byan agencythat could considerits application. Where do you go for that? I tried the National Safety Council but they said they don't get involved. Isnt there a Nader group that would review my safetyfeature? A, If your safety system requires ammunition, you can call the NRA.If it doesn’t, Tim Hurd, spokesman for the National Highway Traffic Safety Administration in Washington,D.C., said you can send your idea to Ray Owings, NHTSA-Research and Development, 400 7th St, SW, Washington, D.C., 20590. Be advised that you probably have better odds of winningthe lottery three weeks in a row than of coming up with an idea that merits pursuing. But you don’t relatively small space. This compressed fuel/air The intakeand exhaust valves in your engine der. That pressure thenallowsthe cylinder to actuate the brake at that wheel. That cylinder operates a disc or drum-type the resulting explosion sendsthe piston down Man's Primer on How a Car Works.” Instead, wewill dub it “A Woman’s Guide to Automo- ‘on the power stroke. After the piston reaches are opened and closed by the lobes on its thebottomofits travel, the exhaust valve opens and the piston starts back up on the exhaust stroke,forcing the burnedgas throughthe open camshaft(s). Many engines actuate all of the the room. It is, after all, worthwhile to have a general idea of how yourcar works.It could save you money when car mechanics andsalesfolk start speaking in tongues. So,let’s take a look at some fundamentals, and some costly, techie hardware you maydecide you don’t need: * How an engine works: Yourcar's engine works by admitting a mixture offuel and air into cylinders, whereit is squeezedinto a small space bya piston andthen exploded. Theforce ofthat explosion drivesthe piston down. That piston moves a connecting rod which,in tum, rotates the crankshaft. That crankshaft rotation is transferred,via the drivetrain, to the wheels exhaust: valve and eventually out the tailpipe. Now,the pistonis at the topofits travel, and ready for anotherintake stroke. The compression stroke is a key to engine power because the harder you squeeze that fuel/air mixture, the more powerit will produce whenit is ignited. The squeeze onthat fuel/air chargeis expressedas a “compression ratio.” Let’s say that at the bottom of the intake stoke. thepiston has sucked 10 cubicinches of fuel/air into the cylinder, andthat the piston, on the subsequent compression stroke, squeezes that fuel/air valveswitha single camshaft, Others use a dual camshaft setup in which one shaft operates the intake valves, andthe other works the exhausts. This divisionof labor allows for the more efficient design of the cylinder’s combustion chamber, andthus produces more power * What your transmission does: We need transmissions because engines aren't really very compatible with ourcars andtrucks. Vehi cles need a lot of power whenthey start out, and relatively little once they get going Engines, on the other hand, produce little power at low speeds, and a lot when they are turingover fast into a one-cubic-inch space. Whenyoupressonthebrakepedal, you exert pressure on the hydraulic fluid in the master cylinder. That fluid pressure is transmitted So, we better not bill the following as “A tive Fundamentals,” and hope that needy males will sneak a peek while their wives are out of turn over 15 times for each time the drive wheels turn. while top gear may only require three engine revolutions. + How your brakes work: Your brakes are actuated by a hydraulic/mechanical system. smoother and more refined it is. Assuming consistent cylinder size, more cylinders also mean Through gear reduction, the automatic or Squeezing 10 cubic inches of fuel andairintoa manual transmissionallows the engineto turn throughhydrauliclines to a cylinder at each wheelcalled, logically enough, a wheelcylin- brake. A disc brake consists of a disc, or rotor, and acaliper. The disc tums with the wheel, and the caliper squeezes it when you apply thebrakes, thus slowingthe vehic > get anidea of howit works, tum your kid's wagon upside down, and spin one of the wheels. Then, cup your handandsqueezethe wheel. In the case of drum brakes, the wheel cylin- der activates two semicircular brakes shoes, which expand against the inside of a drum that turns with the wheel. Disc brakes work better than drumbrakes, but are more expensive to manufacture. Thus, one-inch spacecreates a compression ratio of 10-to-1 over much faster at lower speeds, so it can generate much-needed power, then slow discs up front (where most of the braking is ratio, the more power youare getting from the required. Thus, first gear mightlet the engine always use the disc/drum tandem. accomplished) and drums in the rear. Pick- (CALL WANT ADS 237-2000 CAlWa "Sa waukee Ave., Suite 135, Vernon Hills, IL 60061-1523. So, the higher your engine’s compression downat higher speeds, when less oomph is ups, minivans and sport utilities almost | | | 900—Domestic Cars| 900—Domestic Cars | 900—Domestic Cars 900—Domestic Cars 900—Domestic Cars| 900—Domestic Cars 900—Domestic Cars {9Toodee, BUCK BockRo d wi Gard Sent | ao. 98 BUCK LaScbia. 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