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Automobile chassis construction and repair
This is a mind map about car chassis construction and repair, including an overview, clutch, common transmission, etc.
Edited at 2023-12-05 20:13:29- One Hundred Years of Solitude Character Relationship Chart
One Hundred Years of Solitude is the masterpiece of Gabriel Garcia Marquez. Reading this book begins with making sense of the characters' relationships, which are centered on the Buendía family and tells the story of the family's prosperity and decline, internal relationships and political struggles, self-mixing and rebirth over the course of a hundred years.
- One Hundred Years of Solitude Character Relationship Chart
One Hundred Years of Solitude is the masterpiece of Gabriel Garcia Marquez. Reading this book begins with making sense of the characters' relationships, which are centered on the Buendía family and tells the story of the family's prosperity and decline, internal relationships and political struggles, self-mixing and rebirth over the course of a hundred years.
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Project management is the process of applying specialized knowledge, skills, tools, and methods to project activities so that the project can achieve or exceed the set needs and expectations within the constraints of limited resources. This diagram provides a comprehensive overview of the 8 components of the project management process and can be used as a generic template for direct application.
Automobile chassis construction and repair
- One Hundred Years of Solitude Character Relationship Chart
One Hundred Years of Solitude is the masterpiece of Gabriel Garcia Marquez. Reading this book begins with making sense of the characters' relationships, which are centered on the Buendía family and tells the story of the family's prosperity and decline, internal relationships and political struggles, self-mixing and rebirth over the course of a hundred years.
- One Hundred Years of Solitude Character Relationship Chart
One Hundred Years of Solitude is the masterpiece of Gabriel Garcia Marquez. Reading this book begins with making sense of the characters' relationships, which are centered on the Buendía family and tells the story of the family's prosperity and decline, internal relationships and political struggles, self-mixing and rebirth over the course of a hundred years.
- Project Management Process Template
Project management is the process of applying specialized knowledge, skills, tools, and methods to project activities so that the project can achieve or exceed the set needs and expectations within the constraints of limited resources. This diagram provides a comprehensive overview of the 8 components of the project management process and can be used as a generic template for direct application.
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- Outline
Chassis
Overview
Driving principle: traction force "When the car is driving, a force F must be exerted on the car from the outside world. "eg is transmitted to the driving wheels from the transmission system, and the driving wheels get a torque. Since the car tires are in contact with the ground, "rolling resistance" is generated. "Generate a circular force Fo
Fo＝Mt÷r r: driving wheel rolling radius Mt: Torque on the driven wheels Ft: "Traction 7I" for the driving force exerted on the car by the outside world
driving resistance
rolling resistance
Friction between car wheels and the ground Factors: tire structure, tire pressure, road surface properties, total vehicle mass
uphill resistance
Factors: car gravity, uphill gradient
air resistance
Factors: windward area, outer shape, relative speed, surface friction
acceleration resistance
Factors: When starting, when accelerating
Basic conditions
Driving at a constant speed Stationary state
Traction = driving resistance
speed up
Traction is greater than driving resistance
No slipping
Adhesion is greater than traction
Structure and transmission properties
Mechanical system transmission system
Gear type
friction type
Hydromechanical transmission system
hydrostatic drive train
electric drive train
Conversion formula according to transmission ratio
forced control
Automatically operated
semi-automatic
Arrangement
Overview: Mainly related to the type of engine, the purpose of the car, and the location of the car’s center of gravity
Drive mode: all wheels
general form
Front-wheel drive FF
Front-wheel drive FR
Rear-mounted rear drive RR
Mid-mounted rear drive MR
4WD
way
Clutch → Transmission → Universal joint and drive shaft → Transaxle → Main reducer → Differential → Half shaft → Drive wheels
clutch
effect
Ensure the car starts smoothly
Ensure the drive system works smoothly when shifting gears
Prevent driveline overload
form
friction clutch
Number of driven disks
Monolithic
Two-piece
compression spring
multi-spring type
Central spring type
Diaphragm spring type
Operation method
mechanical
Hydraulic
pneumatic
Hydraulic clutch
Electromagnetic clutch
Sincerity
active part
Composed of flywheel, pressure plate, clutch cover
Driven part
Driven plate, first shaft of transmission
Operating mechanism
Separation levers, springs, pedals…
Holding device
compression spring
Ordinary transmission
Transmission Overview
Overview: To adapt to the frequently changing driving conditions of the car, and to work with the engine to make the car have good power and economy.
function
Change gear ratio
Set reverse gear
Set neutral
Performance requirements
1) Have a reasonable number of gears and an appropriate transmission ratio 2) With reverse gear and neutral gear 3) High transmission efficiency, light operation, reliable operation and no noise 4) Simple structure, small size, light weight and easy maintenance
Classification
Gear ratio changes
Stepped transmission
continuously variable transmission
Electric type
Hydraulic type
integrated transmission
Control method
manual transmission MT
automatic transmission AT
Gear transmission principle
Principle of speed change and torque change
•The rotational speed of the two gears is inversely proportional to the number of teeth •The small gear is the driving gear, and its speed decreases when it is transmitted through the large gear. The large gear is the driving gear, and its speed increases when it is transmitted through the small gear. •The ratio of the speed n1 of the driving gear to the speed n2 of the driven gear is called the transmission ratio, represented by i12 •n1z1＝n2z2 Speed x number of teeth Number of driven teeth ÷ Number of driving teeth = Driven speed ÷ Driven speed
Speed ↑ Torque ↓ Speed ↓ Torque ↑ 1st gear: high torque, low speed 5th gear: small torque, high speed
Structure of gear transmission
General thread
•Composed of A speed control mechanism and B speed transmission mechanism •B→ The first shaft of the housing (input shaft, driving shaft), the second shaft (output shaft, driven shaft), intermediate shaft, reverse gear shaft, various gears and bearings, etc.
Housing: It consists of three parts: the transmission front housing, the transmission housing, and the rear housing.
First axis: driven shaft, input shaft
Second axis:
Variable speed transmission mechanism B: The transmission mechanisms of ordinary stepped transmissions include two-shaft type and three-shaft type.