Honda Passport -- Engine/Mechanical
9/15/2000 10:35:38 PM
Passport's 3.2-liter engine is one of the most powerful V-6s in the compact-SUV segment, developing an impressive 205 horsepower at 5400 rpm and a strong 214 lb.-ft. of torque at 3000 rpm. Its dual overhead camshaft, 24-valve design, high compression ratio (9.1:1) and multi-point fuel-injection system give it maximum combustion efficiency, good fuel economy,* low emissions and outstanding performance throughout the rpm band. The 3.2-liter V-6 features a lightweight, all-aluminum block and cylinder head with a 75' "V" design, for compact packaging under the hood and easy access to routine maintenance items.
MULTI-POINT SEQUENTIAL FUEL INJECTION
Using direct-port injection, the sequential fuel-injection system is managed by a powertrain control module (PCM). Sensors allow the PCM to measure inlet airflow, engine vacuum, throttle-valve position, engine temperature and engine speed. The system calculates the exact fuel charge needed, then sends it directly to each cylinder at exactly the right moment in the intake cycle.
DOHC CYLINDER HEADS WITH FOUR VALVES PER CYLINDER
Passport uses a four-valve-per-cylinder valve train. This configuration allows a greater volume of air and fuel into the combustion chamber via the two intake valves, promoting maximum cylinder charging. The combustion chamber's pentroof design creates a swirl effect of the intake charge, helping to densify it so that when spark plug detonation occurs, it bums more completely. After combustion, the two exhaust valves allow more exhaust gases to escape, thereby evacuating the cylinder for a new, uncontaminated intake charge.
DIRECT IGNITION SYSTEM
Because its actuation is based directly on crankshaft position rather than gear- or belt-driven cams, Passport's direct ignition system delivers a hot, reliable spark every time, regardless of outside temper-ature, humidity or engine rpm. Passport's distributorless ignition uses six ignition coils, one for each cylinder. Upon each rotation of the crankshaft, a sensor signals the powertrain control module (PCM) to send a "fire" command to the appropriate coil, which in turn fires the spark plug.
5-SPEED MANUAL TRANSMISSION
Many buyers select a 5-speed manual transmission for the greater control it gives a driver over the engine's performance. On steep grades, or when quick acceleration is needed, it can be kept in a lower gear to match the engine's torque characteristics. Or, to maximize economy and comfort, especially on smooth and level surfaces, it can be shifted into the higher gears more quickly. A 5-speed manual transmission is standard on Passport LX models only.
4-SPEED AUTOMATIC TRANSMISSION
For added convenience and ease of operation, Passport is available with a 4-speed automatic transmission (std. on EX). It features electronically controlled shifting, plus a lockup torque converter in 2nd, 3rd and 4th gears for increased fuel economy. Also, it offers selectable "Power" and "Winter" shift modes, so drivers can choose which shift pattem best meets their needs. In "Power," the gears are held longer so the engine can rev higher for better acceleration: in "Winter," the transmission starts off the line in 3rd gear, to eliminate wheel spin on slippery surfaces.
For enhanced safety, a shift-interlock system is included on Passports equipped with the 4-speed automatic transmission. With this feature, the transmission won't shift out of "Park" unless the driver is depressing the brake pedal at the same time.
Passport's 4-wheel-drive system is engaged quickly and easily by a dash-mounted button. Under normal driving, Passport operates in 2WD (rear-wheel drive) only. This saves wear and tear on the vehicle and improves fuel economy.*
When 4-wheel-drive operation is desired, Passport's shift-on-the-fly allows it to be engaged without requiring the driver to stop the vehicle. 4WD can be engaged at speeds below 60 mph. The same applies when shifting from 4WD (4H) back to 2WD.
2-SPEED TRANSFER CASE
On 4WD Passports, the transfer case engages the front-end drive components, which enables 4-wheel drive. Two 4WD speeds are available, "High" range (4H), for normal driving on wet, icy, sand, gravel, snow-covered or other roads, when the added traction of 4WD is needed. Top speed is limited to 60 mph. "Low" range (4L) is selected when maximum 4WD power is needed, as when climbing or descending steep hills, in certain off-road driving conditions, or for hard pulling in sand, mud or deep snow. The driver must stop the vehicle before shifting from 4H to 4L (see 4WD operation).
A limited-slip differential distributes engine power equally to both rear wheels. This is an advantage over conventional differentials, in which the tire with the least amount of traction gets all the power and spins away, while the other tire with good traction does nothing. A limited-slip differential is standard on 4WD EX, and optional on 4WD LX with the 16-inch wheel package.
INDEPENDENT FRONT DOUBLE WISHBONE SUSPENSION
Passport's fully independent front double wishbone suspension gives it outstanding ride quality and controllability. The suspension's upper and lower control arms help each wheel maintain firm contact with the road surface, at the same time keeping them per-pendicular to the road. This enhances vehicle stability and steering control, especially during cornering.
FRONT AND REAR STABILIZER BARS
All Passports come standard with front and rear stabilizer bars. Stabilizer bars link the suspension sides with the body. During cornering, when a vehicle's body begins to roll, stabilizer bars resist the torsional, or twisting, forces exerted on them, thereby helping to limit the amount of body roll. This enables the vehicle to corner "flatter," enhancing stability and driver control.
LIVE REAR-AXLE SUSPENSION WITH COIL SPRINGS
Passport's live rear-axle suspension uses coil springs. Coil springs help promote a more "forgiving" ride, both on smooth, straight-ahead roads or over bumpy terrain. The benefit to the driver and passengers is a noticeable improvement in ride comfort.
GAS-PRESSURIZED SHOCK ABSORBERS
All Passport models use gas-pressurized shock absorbers, which provide effective control over suspension compression and rebounding. The shocks are mounted in a "staggered" arrangement (on the alternate side of the axle), for excellent traction under braking and resistance to wheel-hopping when accelerating. Gas-pressurized shocks are better able than conventional shocks to resist the overheating and performance breakdown that can occur with heavy off-road use.
VARIABLE-ASSIST POWER RACK-AND-PINION STEERING
One of the key features behind the Passport's remarkable driving character is its new variable-assist power rack-and-pinion steering. As opposed to the previous recirculating-ball steering system, rack-and-pinion pro~ides accurate, on-center feel and more linear steering feedback. This gives the vehicle optimum response to driver input, while giving the driver a greater sense of control.
4-WHEEL ANTI-LOCK BRAKING SYSTEM (ABS)
All Passports come equipped with a standard 4-wheel anti-lock braking system (ABS). When activated by firm, sustained pressure on the brake pedal -- such as in an emergency stop -- the ABS system keeps the wheels from locking up and skidding This helps the driver retain steering control.
POWER-ASSISTED, VENTILATED FRONT DISC BRAKES
All Passports come with 11-inch ventilated front disc brakes. Ventilated discs cool faster than solid disc rotors, resulting in superior resistance to brake "fade" during heavy braking applications (such as when towing, driving off-road or descending steep grades), and promoting longer brake-pad life.
*See EPA Mileage Estimates in the Specifications.