Ford Bronco II - Test de durabilité (1983)

VideoAuto

19/04/2025

Ford Bronco II - Test de durabilité
1983

Catégorie

🚗

Auto

Transcription

Afficher la transcription complète de la vidéo

00:00Sous-titrage Société Radio-Canada

00:30The Bronco II is a utility vehicle derived from the 4x4 Ranger.

00:35Initially, at the Arizona Proving Grounds, test procedures were designed to test full-sized pickup trucks, 4x2 and 4x4.

00:43Ford intentionally made the test procedures tough and intended it as a test for rough-duty usage,

00:49such as coal mines, gravel pits, geological survey, logging, off-road construction, or other similar duty.

00:56Here we have the Bronco II entering the tough Ford testing world at Arizona Proving Grounds.

01:04The same test procedures used for Bronco II are used for all Ford 4x4 pickup trucks and utility vehicles.

01:12Market studies of Bronco, Blazer, Ram chargers, and Jeep owners indicate that the durability and styling

01:18are the most important features to a buyer considering a Bronco II.

01:22Earlier studies indicated that small trucks from which the Bronco II is derived would be used for rough to severe duty.

01:29So, the Bronco II prototype vehicles were put through the same tough test procedures used on full-size 4x4s.

01:37Here we have a full-size F-Series Bronco alongside Bronco II.

01:41The difference in size is apparent.

01:51Note Bronco II's corrosion-free rear liftgate and the convenient access to the rear cargo area.

01:57Here on the Proving Grounds, the most severe part of light truck testing takes place on four special surfaces.

02:27Silver Creek 1, Silver Creek 2, Structural Durability Road, and Power Hop Hill.

02:34The events shown here make up the first portion of the Silver Creek Test Road,

02:39named after the off-road desert trail that was used as test surface through 1977.

02:44This event typifies the structurally damaging events of a severe off-road surface,

02:51and foot-for-foot is probably the roughest road in America.

02:56The road contains more than 40 steel-edged potholes, over 100 bumps, and is run at about 20 miles per hour.

03:03This is the maximum speed at which a driver can maintain vehicle control.

03:09Each 4x4 pickup or utility must complete over 350 passes on this event.

03:17Silver Creek 2, Test Road, is an 800-foot section of broken concrete set in a concrete matrix.

03:24This segment simulates a poorly maintained gravel or asphalt secondary road and is run at 40 miles per hour.

03:304x4 pickups and utilities must complete over 350 passes on this event.

03:39The structural durability road has been used for light truck durability for all recent light truck models.

03:45In 1975, the route was constructed in concrete.

03:49The prior surface was dirt, which required continual maintenance.

03:52The high-speed side is run at 27 miles per hour and contains cobblestones and washboard surfaces.

04:01This low-speed lane of the procedure contains approximately 40 potholes of various orientations

04:06and is run at 12 miles per hour.

04:094x4 pickups and utilities must complete over 2,400 passes of both the high-speed and low-speed lanes of this event.

04:16All Bronco 2s tested at the Arizona Proving Ground are ballasted to simulate maximum axle loading conditions

04:24during 50% of the testing cycles.

04:28With correct spring selection, good structural performance can be expected even on these severe surfaces.

04:34Testing has shown that spring overloading greatly reduces suspension and frame fatigue life,

04:38as well as resulting in undesirable vehicle attitudes.

04:42It is essential that correct springs are ordered when severe usage and heavy loading is anticipated.

04:48Increased axle rating means more jounce clearance, better vehicle attitude,

04:52and improved durability for all chassis components, even on the most severe surfaces.

05:00Power hop hill event simulates the diagonal washboard surface often found on steep gravel road grades.

05:06This washboard tends to induce an axle hop or tramp, which causes high suspension and powertrain forces.

05:13The event has three sections of washboard of different configuration, built on a 12% grade,

05:19and run at 27 miles per hour.

05:214x4 pickup and utilities must complete 175 passes over this event.

05:27Before climbing Translator Hill, shown here,

05:33approximately 1,500 miles of mountainous switchback roads are covered,

05:37driving to and from Translator Hill.

05:40Bronco 2s climb Translator a total of 70 times.

05:43Round trip up and down is 4 miles.

05:46Vehicle speed must not exceed 10 miles per hour.

05:49However, usual speed is 4 or 5 miles per hour.

05:52Translator Hill is a rough, steep mountain trail that tests the Bronco 2 drive system.

05:59The trail is graded occasionally by a bulldozer.

06:01However, only when necessary.

06:07The Bronco 2 successfully completed approximately 2,000 miles in the sand wash,

06:13similar to that shown here.

06:15Along with the sand wash, there are about 6,500 miles of dirt durability roads

06:19that lead to and from the sand wash.

06:29Bronco 2s pass through the twist ditch approximately 3,500 times

06:33to prove structural durability.

06:36Bronco 2s must complete 175 passes through the salt bath.

06:40Bronco 2s must be run through the mud bath 175 times,

06:51the same as the salt bath and power hop hill.

06:55In addition to the events described,

06:57Bronco 2s must successfully complete 1,750 circuits of the high-speed track

07:02or approximately 8,700 high-speed miles

07:05at approximately 80 miles per hour.

07:08Besides the events shown here,

07:11Ford Light Truck subjects pickups and utilities to numerous special tests

07:15that are aimed at testing certain components,

07:18such as brakes locked at 30 miles per hour through a pothole.

07:22Ford accumulated approximately 1 million miles

07:25on the Ranger 4x4 and Bronco 2 prove-out.

07:29The Bronco 2 is part of the Ranger program,

07:31and for the entire program we accumulated in excess of 2.5 million miles.

07:43We never really closed the gate on durability testing.

07:47However, this brief outline of the Bronco 2 program testing

07:51indicates the importance Light Truck assigns to structural durability.

07:55of the surroundingalla JIM各�

08:14USA

08:16USA

08:19USA

08:22USA

Recommandations