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WorksheetsSteering Systems
Total questions: 75
Worksheet time: 1hrs 10mins
What are steering angles?
The angles at which the wheels of a vehicle are set to turn.
The speed at which a vehicle travels.
The distance between the front and rear wheels of a vehicle.
The height of a vehicle from the ground.
Basic hydraulic power steering is explained as:
A system that uses hydraulic fluid to assist in steering the vehicle.
A system that uses electric motors to assist in steering the vehicle.
A system that uses manual force to steer the vehicle.
A system that uses magnetic fields to assist in steering the vehicle.
What is electric/hydraulic power steering?
A system that uses electric motors to assist the driver in steering the vehicle.
A system that uses hydraulic fluid to assist the driver in steering the vehicle.
A system that combines both electric motors and hydraulic fluid to assist the driver in steering the vehicle.
A system that does not assist the driver in steering the vehicle.
Describe full electric power steering.
Full electric power steering uses an electric motor to assist the driver of a vehicle.
Full electric power steering uses hydraulic fluid to assist the driver of a vehicle.
Full electric power steering combines both electric motor and hydraulic fluid to assist the driver.
Full electric power steering does not assist the driver in any way.
How is steering fault diagnosis performed?
By visual inspection
Using diagnostic tools
Through test driving
All of the above
What is a requirement for the power assistance arrangement if the power system fails?
The driver must be able to retain the 'feel' of the ________.
steering wheel
road
engine
brakes
The degree of assistance should be proportional to the effort applied by the ________.
worker
manager
machine
system
What type of steering has been fitted to production vehicles since the early 1950's?
The system uses an engine driven hydraulic pump to provide pressurised fluid to a control valve which supplies an internal or externally mounted hydraulic ____.
cylinder
motor
reservoir
filter
What is the purpose of the pressure switch in the hydraulic steering system?
Identify the components labeled in the diagram of the hydraulic steering system.
Pump, Cylinder, Reservoir
Valve, Motor, Filter
Steering Wheel, Gear, Shaft
Piston, Hose, Fluid
What is the shape of the chamber inside which the pump rotor sits in a vane pump?
The rotor in a vane pump is driven via a drive belt normally driven from the ________.
engine
battery
alternator
transmission
Explain how the vanes in a vane pump create small chambers to pressurize the fluid.
The vanes rotate to create chambers that increase in volume, drawing in fluid, and then decrease in volume to pressurize it.
The vanes remain stationary while the pump casing rotates, creating chambers that pressurize the fluid.
The vanes oscillate back and forth to create chambers that compress the fluid.
The vanes expand and contract to create chambers that draw in and pressurize the fluid.
True or False: In a vane pump, the vanes are fixed and cannot slide in the slots of the rotor.
True
False
What happens to the vanes as the rotor spins in a vane pump?
What is the primary function of the torsion bar in a control valve?
Fill in the blank: As the torsion bar twists, it allows valves to open and close, directing fluid to the appropriate side of the hydraulic ram to provide (a) assistance.
What is needed to operate the steering with low input?
Low input torque
High input torque
No input torque
Variable input torque
What is directly proportional to steering speed?
Fluid output
Engine temperature
Brake pressure
Tire wear
What does reducing the turns from lock to lock of the steering wheel help with?
Reducing the turns from lock to lock of the steering wheel
Improving fuel efficiency
Enhancing engine performance
Increasing vehicle weight
What prevents load from being transferred up the steering column?
Prevents load from being transferred up the steering column
Steering wheel design
Column strength
Load distribution mechanism
What is reduced in the driver due to these advantages?
Reduction in driver fatigue
Increase in driver alertness
Improvement in driver skills
Enhancement in driver vision
What can be fitted without increasing steering effort?
Larger sectional tyres
Smaller sectional tyres
High-performance brakes
Advanced suspension system
What is one disadvantage of power steering related to engine power?
It increases engine power.
It decreases engine power.
It has no effect on engine power.
It improves fuel efficiency.
Power steering affects fuel consumption compared to a non-PAS vehicle by:
increasing fuel consumption
decreasing fuel consumption
having no effect on fuel consumption
improving fuel efficiency
What can happen to the engine if the steering is operated while idling?
The engine may stall.
The engine may overheat.
The engine may run smoothly.
The engine may consume more fuel.
Power steering might be considered expensive because:
it requires regular maintenance.
it uses advanced technology.
it consumes more fuel.
it increases vehicle weight.
What is a potential issue with power steering systems related to leaks?
Loss of steering control
Increased fuel consumption
Noise during steering
Overheating of engine
More complex diagnostic procedures might be needed for power steering systems because:
they are simpler to diagnose.
they have more components and potential failure points.
they are less important than other systems.
they are always electronic.
What is the purpose of using an electric pump in the hydraulic power assisted steering system?
To increase fuel efficiency
To provide hydraulic pressure
To reduce steering effort
To enhance vehicle speed
How does the electric pump affect the engine load in the hydraulic power assisted steering system?
It increases the engine load significantly.
It decreases the engine load.
It has no effect on the engine load.
It optimizes the engine load.
Which component in the hydraulic power assisted steering system is responsible for providing hydraulic pressure?
What is the operating principle of a full electric power steering system?
Power is used continuously
Power is used only when required
Power is used when the engine is off
Power is used when the vehicle is stationary
In a full electric power steering system, where does the system take current from?
Battery
Alternator
Engine
Fuel tank
Compared to hydraulic power steering, less power is used in a full electric power steering system. (True/False)
True
False
Fill in the blank: In a full electric power steering system, there is less drain on the engine's power and _______.
efficiency
fuel consumption
noise
vibration
What does the electric power steering system comprise of?
Fill in the blank: The electric power steering system includes a _______ mechanism.
hydraulic
mechanical
pneumatic
electronic
Match the components with their descriptions:
Steering mechanism
Steering mechanism
Torque sensor
Torque sensor
Electric assistance motor
Electric assistance motor
ECU connected to CAN network
ECU connected to CAN network
Which component is responsible for connecting the ECU to the CAN network?
Fill in the blank: The electric power steering system uses two harnesses, one signal harness and one _______ harness.
power
control
data
communication
The operating principle of electric power steering is:
Hydraulic pressure assists the steering mechanism.
An electric motor assists the steering mechanism.
Manual force is used to steer the vehicle.
Compressed air assists the steering mechanism.
The assistance torque in electric power steering is provided by what component?
Electric motor
Hydraulic pump
Steering column
Battery
How is the torque transmitted to the steering rack in a full electric steering system?
By a reduction gear
By a hydraulic pump
By a direct drive
By a belt drive
In a full electric steering system, the torque is added to the torque applied by the _______.
driver
engine
brakes
transmission
What is the role of the sensor in a full electric steering system?
To measure the driver's torque
To control the steering wheel
To power the ECU
To adjust the pinion
The function of the torque sensor in the steering system is to:
measure the angle of the steering wheel
detect the force applied by the driver
control the speed of the vehicle
adjust the steering wheel position
Where is the torque sensor fitted in the steering system?
In the steering wheel
In the steering column
In the power steering pump
In the steering rack
The torque sensor determines the direction of steering wheel rotation and the torque exerted by the driver.
True
False
The torque sensor permanently measures the torque applied to the steering wheel by the driver.
True
False
This steering system does not use a steering wheel angle sensor.
True
False
The three parts of the torque sensor are:
Rotor, Stator, and Housing
Sensor, Processor, and Output
Input, Output, and Feedback
Torque, Speed, and Power
The mechanical part of the torque sensor consists of a ______ bar, similar to the torsion bars used on normal hydraulic valves.
torsion
compression
shear
bending
The electronic part of the sensor converts angular position information into torque information using the principle that the angular distortion is proportional to the ______.
steering wheel torque
angular velocity
linear displacement
rotational inertia
A 'screwdriver mechanism' limits the angular deflection to +/- ______ degrees.
4.5
2.0
6.0
8.5
What is the relationship between the angular deflection and the torque applied by the driver?
Angular deflection is directly proportional to the torque applied.
Angular deflection is inversely proportional to the torque applied.
Angular deflection is independent of the torque applied.
Angular deflection is equal to the torque applied.
What is the purpose of the torque sensor's second detection stage?
Fill in the blank: A reference coil, (detection ring 1) the characteristics of which do not change with the angular movement of the (a) .
What is used to transmit electrical reference information regardless of the surrounding conditions?
What does the ECU supply to the motor depending on inputs from steering wheel torque vehicle speed sensors?
Fuel
Air
Electric current
Hydraulic pressure
The steering ECU can be directly mounted onto the motor or remotely mounted as per the diagram. True or False?
True
False
What is the ECU function when the vehicle speed is less than 7 kph? (parking, maneuvering) Maximum assistance. The ECU controls the assistance motor as a function of torque sensor only.
parking
maneuvering
At what speed range does the ECU control the assistance motor as a function of torque sensor and vehicle speed, with assistance decreasing as vehicle speed increases?
0-20 km/h
20-40 km/h
40-60 km/h
60-80 km/h
When the speed is above 152 kph, how does the ECU control the assistance motor?
What type of motors are generally used for electric steering?
Alternating current motors
Direct current brush motors
Induction motors
Synchronous motors
Fill in the blank: The power output of the motor varies depending on application and the manufacture requirements: typically, 30-60 A (for small vehicles) and 65-75 A (for larger vehicles).
The power output of the motor varies depending on application and the manufacture requirements.
The power output of the motor is constant regardless of application and manufacture requirements.
The power output of the motor is always 30-60 A for all vehicles.
The power output of the motor is always 65-75 A for all vehicles.
What are the two conditions that must be satisfied for the motor to operate?
The motor must be connected to a power source and the circuit must be closed.
The motor must be lubricated and the temperature must be below 50°C.
The motor must be new and the voltage must be exactly 220V.
The motor must be in a vacuum and the current must be alternating.
Explain the motor thermal protection mechanism in steering motors.
Motor thermal protection prevents overheating by using temperature sensors.
Motor thermal protection enhances speed by reducing friction.
Motor thermal protection increases power output by optimizing voltage.
Motor thermal protection reduces noise by dampening vibrations.
What does the ECU do to prevent the assistance motor from overheating?
It increases the motor speed.
It decreases the motor speed.
It shuts down the motor.
It sends a warning signal.
What is the main function of the EPS Control Module in the Electric Power Steering system?
To provide hydraulic assistance to the steering system
To control the electric motor that provides steering assistance
To monitor the vehicle's speed and adjust steering sensitivity
To manage the battery power distribution in the vehicle
Which component in the EPS system is responsible for filtering noise?
Identify the component labeled 'M' in the EPS system wiring diagram.
Motor
Sensor
Controller
Battery
In the EPS system wiring diagram, the 'CPU' in the EPS Control Module connects to:
the battery
the ignition switch
the steering sensor
the vehicle's main computer
