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Shandong Zhengneng Auto Test Equipment : Your Professional Chassis Dynamometer Manufacturer !

Our company has focused on automobile inspection technology research for more than 30 years. Our main products are new car high-end inspection lines (including non-contact dynamic four-wheel alignment, integrated drum platform, gantry headlight instrument, ADAS calibration, rain room drying room, safety Innovative products such as electrical testing and automotive R&D chassis dynamometers) driverless intelligent chassis performance testing system and vehicle external perception and automatic safety function effectiveness testing system, which can replace imported equipment.

Rich Product Range

The company's main products include high-end testing lines (including non-contact four-wheel alignment, comprehensive roller test bench, dual-axis ABS brake tester, gantry headlight tester, etc.), driverless testing lines, offline testing equipment automobile factory ( Four-wheel alignment, brake tester, speed tester, sideslip tester, axle load tester, etc.

Advanced Production Equipment

In order to ensure production, we have different processing equipment, such as lathes, drilling, milling and boring grinders, milling and drilling machines, balancing machines, metal band saws, air compressors, flame cutting machines, metal band saws, plasma cutting machines, radial drills, etc.

Widely Sold

Our equipment is exported to overseas automobile manufacturers such as Russia, Iran, Nigeria, Thailand, Uganda, South Korea, and Myanmar. And our cooperative customers include well-known domestic automobile manufacturers such as Geely, Changan, and GAC.

Quality Guaranteed

The products produced by our company have passed quality inspection, and our team has 3 authorized invention patents, 38 utility model patents, and 22 soft patents.

A Device For Testing The Dynamic Performance Of A Vehicle

In the field of automobile manufacturing, electric chassis dynamometer is an indispensable

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A Device For Detecting The Chassis Of An Automobile

Electric chassis dynamometer is a kind of high-precision equipment used to test the dynamic

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Car Chassis Dynamometer

With the rapid development of new energy vehicles, the application of electric chassis dynamometers

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Car Chassis Dynamometer

A head-up display (HUD) is a transparent display that projects information onto a viewing surface,

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Car Chassis Dynamometer

The dynamometer is suitable for the test of the dynamic performance, emission and other performance

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What is Chassis Dynamometer

A chassis dynamometer is a specialized piece of equipment used primarily in automotive engineering and testing to simulate real-world driving conditions and measure the performance of vehicles. It consists of a large steel frame with rollers onto which the vehicle's drive wheels are placed, allowing the vehicle to be operated while stationary. The dynamometer's rollers are connected to a sophisticated system of sensors, control units, and data acquisition devices that enable precise measurement and analysis of various parameters related to vehicle performance, emissions, and efficiency.

Features of Chassis Dynamometer

Roller Configuration

Chassis dynamometers typically consist of two or more rollers onto which the vehicle's drive wheels are placed. These rollers can vary in size and material, with options for different wheelbase lengths and weight capacities to accommodate a wide range of vehicles, from passenger cars to heavy-duty trucks.

Power Absorption System

The power absorption system is responsible for applying resistance to the vehicle's wheels, simulating road load conditions and controlling the vehicle's speed during testing. Common methods of power absorption include hydraulic brakes, eddy current brakes, and electric motors, each offering different levels of control and efficiency.

Safety Features

Safety is a top priority in chassis dynamometer design, and modern systems are equipped with a range of safety features to protect operators and vehicles during testing. These features may include emergency stops, safety barriers, interlocks, and overload protection mechanisms to prevent accidents and ensure safe operation.

Emissions Measurement System

Many chassis dynamometers are equipped with emissions measurement systems that allow for real-time monitoring and analysis of exhaust emissions during testing. These systems use advanced sensors and analyzers to measure pollutants such as carbon monoxide (CO), hydrocarbons (HC), nitrogen oxides (NOx), and particulate matter (PM), helping to assess compliance with regulatory standards.

Types of Chassis Dynamometer

Single Drum
The single-roller chassis dynamometer supports one roller on each side of the drive wheel. The diameter of the roller is larger (generally between 1500 and 2500mm), there are fewer supporting bearings, and the mechanical loss of the bench is small. The larger the diameter of the drum, the more like the wheel rolling on the drum. The slip rate between the tire and the drum is small, and the rolling resistance is small. Therefore, the test accuracy is high, but the manufacturing and installation costs are high. It is generally used in manufacturing plants and scientific research institutions.

Double Roller
The double-drum chassis dynamometer has two rollers supporting the drive wheels on each side. The diameter of the rollers is small (generally between 180 and 500 mm). Compared with the single-drum chassis dynamometer, it has four more support bearings and one more Couplings suffer large mechanical losses during the inspection process. The smaller the diameter of the drum, the greater the difference between the contact between the wheel and the drum and the difference on the flat road. The slip rate between the tire and the drum increases, and the rolling resistance increases, so the test accuracy is poor. The advantages are low equipment cost, easy to use, and generally Used in automobile use, maintenance industry and automobile inspection lines or inspection stations.

Basic Structure of Chassis Dynamometer

Roller Device
The rotation of the roller is equivalent to a continuously moving road surface, on which the wheels of the car under test roll, using the roller to simulate the road surface. The surface of the roller can be a smooth roller, a knurled roller, a grooved roller, a coated roller, etc. It can be appropriately selected according to the usage conditions, and the adhesion of the roller should be as close as possible to the actual condition of the road. Smooth rollers are currently the most widely used form.

Power Absorbing Device
Simulate the air resistance, rolling resistance of non-driving wheels and climbing resistance experienced by the car during operation. The types of chassis dynamometer power absorption devices used on automobile testing lines include: eddy current type, hydraulic type and electric type.

Inertial Simulation Device
The rotational inertia of the inertia flywheel is used to simulate the rotational inertia of the car's rotating mass and the inertia of the car's translational mass. The electromagnetic clutch is used to automatically or manually switch the flywheel combination to meet the car's inertia simulation within the allowable error range.

Control System
Common position control signals for automobile chassis dynamometers include lifter lifting control or roller lock control, solenoid valve control, flywheel control, vehicle detection light control, manual or automatic control and other signals.

Boot System
The guidance system is also called the driver assistant, and its function is to guide the driver to operate according to the prompts. There are two methods of prompting: one is a display board, and the other is a large-screen display device.

Drum Locking System
Commonly used ratchet and pawl locking system devices. It consists of a two-way cylinder, a ratchet, a pawl, a return spring, a lever and a controller. The controller controls the on and off of the compressed air. When a certain direction is ventilated, the air pushes the cylinder piston movement to control the pawl and ratchet clutch to achieve Lock or release purpose.

How to Choose Chassis Dynamometer

Purpose
Determine the primary use of the dyno. Will it be used for general shop work, tuning, research and development, or high-performance applications? The type of work will influence the required power capacity, accuracy, and features.

Power Capacity
Select a dyno that matches the power range of the vehicles you plan to test. Ensure there is sufficient headroom for higher horsepower vehicles if you anticipate testing high-performance models.

Accuracy and Resolution
Look for a dyno with high accuracy and resolution to provide precise measurements. This is especially important for fine-tuning and diagnostics.

Load Simulation
Consider whether you need a dyno that can simulate varying road conditions, such as uphill or downhill driving, or if a simple flat road simulation will suffice.

Data Acquisition and Software
Investigate the data logging capabilities and software compatibility. Modern dynos often come with advanced software that allows for detailed analysis, customizable reporting, and remote access.

Durability and Build Quality
The construction quality should be able to withstand the rigors of daily use. Look for a dyno with a robust frame and components that can handle repetitive high-load testing.

Space Requirements
Measure the available space in your facility to ensure the chosen dyno fits within the dimensions. Also, take into account any additional room needed for ancillary equipment and maneuvering around the dyno.

Safety Features
Check for safety features such as automatic shutdown in case of overheating, software-controlled load limits, and emergency stops to protect both the operator and the vehicle.

Customization
If your requirements are unique, look for a manufacturer that offers customization options to meet your specific needs.

Ease of Use
Consider how user-friendly the dyno is. Intuitive controls and a straightforward interface can greatly enhance productivity, especially if operators will vary.

Working Principle of Chassis Dynamometer

Vehicle Installation
First, drive the vehicle to be tested onto the test bench of the chassis dynamometer, and install and fix it correctly according to the vehicle type and size to ensure a solid connection between the vehicle and the dynamometer.

Transmission System
The chassis dynamometer is connected to the vehicle's transmission system to obtain the power output from the vehicle's engine. Typically, a chassis dynamometer is connected to the engine through the vehicle's driveshaft or wheels.

Load Simulation
The chassis dynamometer uses a load device to simulate the resistance encountered by the vehicle during actual driving. The load device can be a hydraulic load, an electromagnetic load, or a hydraulic load, etc., which applies resistance to simulate the vehicle's driving conditions at different speeds and load conditions.

Power Measurement
A chassis dynamometer uses sensors to measure the power and torque output of a vehicle's engine. These sensors can monitor the speed and torque of the vehicle's driveshaft or wheels and transmit the data to the dynamometer system for calculation and recording.

Control and Analysis
The chassis dynamometer adjusts the load device via a control system to maintain specific test conditions. At the same time, the dynamometer collects, analyzes and records data obtained from sensors, such as power, torque, speed and fuel consumption.

Test Results
The chassis dynamometer can provide the output of test results and performance parameters, including engine output power, maximum torque, acceleration performance, fuel consumption, etc. These results can be used to evaluate engine performance, perform fault diagnosis and compare performance differences between different vehicles or engines.

How to Maintain Chassis Dynamometer

Monthly Preventative Maintenance
(1):Verify the roll bearings and ensure there are no tracks or broken seals. Typically, if there are no signs of lubricant leaking than your bearings should be in good working order.

(2): Apply lubrication at the junction box in the center of the chassis dyno. Use approximately 1/2 oz of 615 Valvoline red grease or equivalent per terminal.

(3): Verify that your air supply is properly lubricated and pressurized at 90PSI. This is to apply the air brakes, but not to stop the rollers during a test. The air brakes, with properly functioning air supply, allow you to easily get your vehicle on and off the dyno.

6 Month Chassis Dyno Maintenance
Verify the belts on the chassis dyno (located centrally). Each belt should have some bounce in the tension, but there should be no cracks, barbs, stray wires, or broken materials.

Applications of Chassis Dynamometer

Automotive Research and Development
Chassis dynamometers are extensively used in automotive research and development facilities to test and evaluate vehicle performance, emissions, and drivability. Engineers use dyno testing to assess engine performance, fuel efficiency, emissions compliance, and drivetrain dynamics under controlled conditions.

Performance Tuning and Optimization
Dyno testing allows for fine-tuning engine parameters, such as ignition timing, fuel delivery, and air-fuel ratio, to maximize horsepower, torque, and overall engine efficiency.

Emissions Testing and Compliance
Chassis dynamometers play a crucial role in emissions testing and compliance for vehicles. Dyno testing enables accurate measurement and analysis of exhaust emissions, including pollutants such as carbon monoxide (CO), hydrocarbons (HC), nitrogen oxides (NOx), and particulate matter (PM), ensuring compliance with environmental regulations.

Durability and Reliability Testing
Automotive manufacturers use chassis dynamometers for durability and reliability testing of vehicles and vehicle components. Dyno testing simulates various driving conditions, such as high-speed operation, towing, and off-road driving, to assess the durability and reliability of vehicle systems, including engines, transmissions, drivetrains, and brakes.

Fuel Economy and Energy Efficiency Testing
Chassis dynamometers are employed to evaluate the fuel economy and energy efficiency of vehicles, including hybrid and electric vehicles. Dyno testing allows engineers to measure fuel consumption, energy consumption, and powertrain efficiency under different driving cycles, aiding in the development of more fuel-efficient vehicles.

Noise, Vibration, and Harshness (NVH) Testing
Chassis dynamometers are used for NVH testing to evaluate the noise, vibration, and harshness characteristics of vehicles. Dyno testing enables engineers to assess vehicle interior and exterior noise levels, vibration characteristics, and ride comfort under various driving conditions, helping to identify and mitigate NVH issues.

Vehicle Certification and Regulatory Compliance
Chassis dynamometers are utilized for vehicle certification and regulatory compliance testing. Dyno testing ensures that vehicles meet safety, emissions, and performance standards mandated by regulatory agencies and authorities, facilitating vehicle type approval and market access.

Fleet Management and Maintenance
Chassis dynamometers play a crucial role in fleet management operations, allowing fleet managers to monitor and maintain the performance and condition of vehicles in their fleets. Dyno testing helps identify maintenance needs, diagnose mechanical issues, and optimize vehicle operation for improved reliability, safety, and efficiency.

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Frequently Asked Questions

Q: What is a chassis dynamometer?

A: A chassis dynamometer is a testing device used to measure and evaluate the performance of vehicles by simulating real-world driving conditions. It consists of a set of rollers onto which the vehicle's wheels are placed, allowing the vehicle to be tested while stationary.

Q: How does a chassis dynamometer work?

A: Chassis dynamometers work by applying load to the vehicle's wheels, simulating road resistance and allowing the vehicle's engine to operate under various driving conditions. The dynamometer measures parameters such as horsepower, torque, speed, and emissions, providing valuable data for performance analysis.

Q: What are the different types of chassis dynamometers?

A: There are several types of chassis dynamometers, including inertia dynamometers, brake dynamometers, and eddy current dynamometers. Inertia dynamometers use the vehicle's inertia to measure performance, while brake dynamometers apply load through friction brakes. Eddy current dynamometers use electromagnetic fields to apply load to the vehicle's wheels.

Q: What are the benefits of using a chassis dynamometer?

A: Chassis dynamometers offer numerous benefits, including the ability to conduct controlled testing in a laboratory environment, replicate real-world driving conditions, measure vehicle performance accurately, and diagnose mechanical issues effectively. They are essential tools for vehicle development, emissions testing, performance tuning, and regulatory compliance.

Q: How is a chassis dynamometer calibrated?

A: Calibration of a chassis dynamometer involves adjusting its measurement systems to ensure accuracy and reliability. Calibration procedures typically include verifying speed, torque, and power measurements against known standards and making adjustments as needed to correct any discrepancies.

Q: What types of vehicles can be tested on a chassis dynamometer?

A: Chassis dynamometers can be used to test a wide range of vehicles, including cars, trucks, motorcycles, buses, and even off-road vehicles. They are versatile testing devices capable of accommodating different vehicle sizes, weights, and powertrains.

Q: What parameters can be measured using a chassis dynamometer?

A: Chassis dynamometers can measure various parameters, including horsepower, torque, speed, acceleration, fuel consumption, exhaust emissions (such as CO, CO2, HC, NOx), and vehicle efficiency. These measurements provide valuable insights into vehicle performance and drivability.

Q: What are the limitations of chassis dynamometers?

A: While chassis dynamometers offer many advantages, they also have limitations. For example, they may not accurately replicate all real-world driving conditions, such as wind resistance or road surface variations. Additionally, certain types of vehicles or modifications may not be compatible with certain types of dynamometers.

Q: How are chassis dynamometers used in vehicle development?

A: Chassis dynamometers play a critical role in vehicle development by allowing engineers to test and optimize vehicle performance, emissions, and drivability in a controlled environment. Dyno testing enables engineers to identify areas for improvement, evaluate design changes, and validate vehicle prototypes before production.

Q: What is the difference between an inertia dynamometer and a brake dynamometer?

A: Inertia dynamometers measure vehicle performance based on the vehicle's inertia, while brake dynamometers apply load to the vehicle's wheels using friction brakes. Inertia dynamometers are typically used for performance testing, while brake dynamometers are often used for emissions testing and diagnostics.

Q: How can chassis dynamometers help improve fuel economy?

A: Chassis dynamometers can be used to evaluate fuel economy by measuring fuel consumption and vehicle efficiency under various driving conditions. Dyno testing allows engineers to identify factors affecting fuel economy, such as engine tuning, aerodynamics, and drivetrain efficiency, and optimize vehicle designs accordingly.

Q: What role do chassis dynamometers play in emissions testing?

A: Chassis dynamometers are essential tools for emissions testing, allowing engineers to measure and analyze exhaust emissions from vehicles under controlled conditions. Dyno testing helps ensure compliance with regulatory emissions standards and identifies opportunities for emission reduction technologies.

Q: How are chassis dynamometers used in performance tuning?

A: Chassis dynamometers are commonly used for performance tuning to optimize engine parameters such as fuel delivery, ignition timing, and air-fuel ratio. Dyno testing allows tuners to assess the effects of tuning modifications on horsepower, torque, and overall engine performance before implementation.

Q: What safety precautions should be observed when using a chassis dynamometer?

A: When using a chassis dynamometer, it is essential to observe safety precautions to protect both personnel and equipment. Precautions may include ensuring proper vehicle restraint, implementing emergency stop procedures, providing adequate ventilation for exhaust gases, and using personal protective equipment as needed.

Q: How do chassis dynamometers contribute to vehicle certification?

A: Chassis dynamometers play a crucial role in vehicle certification by providing accurate and repeatable measurements of vehicle performance, emissions, and drivability. Dyno testing helps ensure that vehicles meet regulatory standards and certification requirements before entering the market.

Q: What are some common applications of chassis dynamometers in the automotive industry?

A: In the automotive industry, chassis dynamometers are used for a wide range of applications, including vehicle development, emissions testing, performance tuning, regulatory compliance, durability testing, and quality control. They are essential tools for improving vehicle performance, efficiency, and reliability.

Q: How do chassis dynamometers contribute to research and innovation in the automotive sector?

A: Chassis dynamometers enable researchers and engineers to conduct controlled experiments and studies to advance automotive technology and innovation. Dyno testing facilitates the development of cleaner, more fuel-efficient vehicles, as well as the implementation of new technologies such as hybrid and electric powertrains.

Q: What factors should be considered when selecting a chassis dynamometer?

A: When selecting a chassis dynamometer, factors to consider include the type of testing required, compatibility with vehicle types and sizes, power and torque capacity, speed range, accuracy and precision of measurement systems, control and data acquisition capabilities, safety features, environmental considerations, and budget constraints.

Q: How do chassis dynamometers aid in fleet management and maintenance?

A: Chassis dynamometers are valuable tools for fleet management operations, allowing fleet managers to monitor and maintain the performance and condition of vehicles in their fleets. Dyno testing helps identify maintenance needs, diagnose mechanical issues, and optimize vehicle operation for improved reliability, safety, and efficiency.

Q: What advancements are being made in chassis dynamometer technology?

A: Advancements in chassis dynamometer technology include improvements in measurement accuracy and precision, enhanced control and data acquisition capabilities, integration with vehicle diagnostic systems, development of portable and mobile dyno solutions, and adoption of alternative energy sources such as electric and hybrid powertrains for testing. These advancements contribute to more efficient and effective vehicle testing and evaluation processes.

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