BASIC VEHICLE TECHNOLOGIES 1: DRIVETRAINS
With Nissan's shift-on-the-fly 4WD, the driver may shift between 2-wheel drive and 4-wheel-drive high range when the vehicle is traveling at speeds of up to _____ mph.
60
In a front-wheel-drive vehicle, what is the transaxle?
A single unit combining the clutch, gearbox, and differential gears between the front wheels
Varies the distribution of power between front and rear axles to provide additional traction
A single unit combining the clutch, gearbox, and differential gears between the front wheels.
What are the advantages of front-wheel drive?
Allows more interior space for a given size Places more weight over the front tires to improve traction
The 2-range CVT combines conventional CVT belt operation with ________ to significantly increase the range of available drive ratios.
An auxiliary gearset
What is the advantage of Active Brake Limited Slip?
Applies individual braking force to any wheel that has lost traction.
What are the main types of 4-wheel-drive systems that Nissan uses?
Automatic 4-wheel drive Part-time 4-wheel drive
How does tow mode help reduce gear hunting when driving under a load or when towing uphill?
By revising the transmission shift points
What are the benefits of the Xtronic CVT (Continuously Variable Transmission)?
Eliminates hunting for the right gear when driving uphill No waiting for the transmission to downshift when passing Avoids shift shock and delivers smooth acceleration
What factors determine how an automatic transmission selects the proper gear?
Engine output Vehicle speed Throttle position
The Xtronic CVT (Continuously Variable Transmission) weighs ________ and has ________ moving parts than a conventional automatic transmission.
Less; fewer
What is the advantage of being able to choose 2-wheel drive in a part-time 4-wheel-drive system?
Limits wear on drivetrain components for reduced maintenance costs
Compared to 4-wheel-drive vehicles, all-wheel-drive vehicles lack ________.
Low-range gearing.
What are the advantages of rear-wheel drive compared to front-wheel drive?
More even weight distribution for precise handling and excellent driver feedback More braking force can be applied to the rear wheels Divided steering and power delivery functions between the front and rear wheels
In Auto mode, Nissan's All-Mode 4WD system directs power to the rear axle only, for ________.
Optimal fuel economy.
Nissan's torque vectoring AWD system automatically increases torque to the ________ when cornering to help the vehicle turn more quickly.
Outside rear wheel
Rear-wheel drive is the preferred configuration for what vehicles?
Performance vehicles Trucks and utility vehicles.
What does Downshift Rev Matching do for an automatic transmission?
Provides smoother downshifts and a sportier sound and feel.
What are the advantages of D-step tuning?
Reduces the engine noise of constant high-rev acceleration. Provides a more natural feel during rapid acceleration.
How does D-step tuning affect CVT operation?
Simulates shifts in certain driving situations
How does the Xtronic CVT (Continuously Variable Transmission) vary its gear ratios?
Simultaneously adjusts the diameter of the drive pulley and the driven pulley.
What are the advantages of an electronically controlled transmission?
Smooth, efficient shifting Increased service life.
Unlike conventional AWD systems, Nissan's intuitive AWD incorporates input from ________.
The steering angle sensor The yaw rate/lateral g-sensor.
Which of the following statements are true of driving in 4LO?
Throttle sensitivity is reduced The vehicle must be stopped with the transmission in Neutral or Park to engage/disengage 4LO Maximum speed is limited to 30 mph Operating on dry pavement is not recommended
What is the primary intent of all-wheel drive?
To enhance on-road all-weather capability
The primary function of intuitive AWD is to provide the driver with enhanced maneuverability and a more confident feeling when driving, especially when ________.
Turning.
In Auto mode, how does Nissan's All-Mode 4WD system react when it senses changes in surface conditions?
Varies the distribution of power between front and rear axles to provide additional traction.
What is the advantage of Adaptive Shift Control?
When cornering, it holds the current gear for better acceleration out of the turn