Light duty vehicle performance testing environment warehouse

Technical solution
(2024 version)

 EST Environmental Test Chamber Case

2.2. Preconditions

The EST scheme is based on the following prerequisites:

1. The chassis dynamometer is provided by a third party and is suitable for use under environmental conditions. It also provides a cover plate for the entire base pit, and the entire chassis dynamometer will be installed in the pit.
2. The speed facing fan is also supplied by the chassis dynamometer supplier.
3. The peripheral devices of the environmental warehouse will be installed on the second floor equipment layer above the environmental warehouse or in the equipment room next to the environmental warehouse.
4. The maximum environmental chamber heat load/cooling capacity calculated by EST is listed in the subsequent cooling capacity table.
5. The foundation pit for the environmental compartment and chassis dynamometer shall be constructed by the buyer, and the seller shall provide design and drawings.
6. EST provides one set of closed cooling water tower.
7. The buyer will prepare appropriate ground for the cooling water tower.
8. Adequate water, electricity, and gas supplies have been delivered to the designated location near the installation site.

Applicable standards:

GB 18352.6-2016 "Limits and Measurement Methods for Pollutant Emissions from Light duty Vehicles (China Phase VI)".

GB/T 19233-2020 "Test Method for Fuel Consumption of Light duty Vehicles".

GB 27999-2019 "Evaluation Methods and Indicators for Fuel Consumption of Passenger Cars"

GB/T 18386.1-2021 "Energy consumption and driving range test methods for electric vehicles - Part 1: Light vehicles"

GB/T 19753-2021 "Test Method for Energy Consumption of Light Hybrid Electric Vehicles"

GB/T 32694-2021 Technical Conditions for Plug in Hybrid Electric Passenger Cars

2.3.1 Overview of Test Cycles

2.3.2. 温度范围:-10℃ to +50℃。2.3.2.  Temperature range:- 10 ℃ to+50 ℃.

2.3.3 Temperature accuracy: ± 1 ℃, no heat load, at the outlet of the speed fan.

2.3.4 Temperature accuracy: ± 1.5 ℃, steady state.

2.3.5 Temperature accuracy: ± 2.0 ℃, measured 1m on both sides at the outlet of the fan in front of the vehicle, with thermal load, steady state.

2.3.6 Cooling rate: From+50 ℃ to -10 ℃, the average rate throughout the entire process is ≥ 0.5 ℃/minute, including a load of 3 tons of vehicles.

2.3.7 Heating rate: From -10 ℃ to+50 ℃, the average rate throughout the entire process is ≥ 0.5 ℃/minute, including a load of 3 tons of vehicles.

2.3.8 Range of relative humidity

2.3.9 Humidity control accuracy:

No condensation, (temperature ≤ 0 ℃)

± 3%, (no empty load)

± 5%, (with vehicle empty)

2.3.3 Environmental cabin:

External dimensions: 15700x7700x5700mm (L x W x H)

Internal dimensions: 15500x7500x5500mm (L x W x H);
Insulation board thickness: 100mm hard polyurethane foam, density ≥ 40kg/M3
Outer surface: 1.0mm thickness, galvanized steel plate spray painted (milky white)
Inner surface: 1.0mm thickness, matte stainless steel plate, SUS304

Warehouse floor and pit insulation board:

The warehouse floor adopts 3/5mm patterned stainless steel SUS 304 floor Underneath the floor is a 24mm laminated board with uniform pressure. 100% hard polyurethane foam, with a galvanized spray coated steel plate containing load-bearing wooden columns at the bottom: 0.8mm. Ensure that the load-bearing capacity is: Above 1500kg/wheel.

The pit insulation board is the same as the other parts of the warehouse board:

Insulation board thickness: 100mm hard polyurethane foam, density ≥ 40kg/M3
Outer surface: 1.0mm thickness, galvanized steel plate spray painted (milky white)
Inner surface: 1.0mm thickness, stainless steel plate, SUS304

Personnel entry and exit doors and transition rooms

Large control observation window: 2000 mm x 1000 mm (W x H), Electric heating window frame anti frosting

Dynamometer cable holes: 4, Æ 100 mm
Fresh air duct hole: 1, Æ 300 mm, insulated
Exhaust pipe hole: 1, Æ 400 mm, insulated
Refrigeration pipe holes: 2, Æ 28 mm, insulated
Exhaust pipe holes: 2, Æ 54 mm, insulated

Install 2 Bitzer screw compressors with boosters.