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Xiao Bian introduced the "Training Race" to the card friends. Dongfeng Tianjin KR, which matches the Dongfeng Cummins ISD engine, won with an absolute advantage of 8 minutes and 12 seconds. It explains what is efficient! Today, Xiaobian introduces another one. The fuel-saving challenge, the goal is to match the Dongjin Cummins ISD engine's Tianjin KR challenge 18 liters of fuel consumption per 100 kilometers, the result of the challenge, and see the following decomposition.
Matching Tianjin KR with Dongfeng Cummins ISD engine Matching Tianjin KR with Dongfeng Cummins ISD engine

On April 26-27, 2019, the Chengyu Express Fuel Consumption Challenge was held in Chengdu. The race car departed from a 4S store in Chengdu, from the Shuangliubei Toll Station to the expressway, via the Jingkun Expressway and the Chengdu Second Ring Expressway. After arriving at the Chongzhou toll station, the U-turn was returned. The whole stage was 100 kilometers, including 90 kilometers of high speed and 10 kilometers of national road. There were 14 traffic lights along the road.

Before departure, Tianjin KR completed the counterweight and loaded sand and gravel. The total weight of the cargo was 18 tons. After the vehicle is in place, the fuel tank is emptied and 60 liters of diesel is injected. After the fuel tank is sealed at the notary office, the vehicle will arrive at the same position as the departure time, and then the oil in the fuel tank will be released and weighed.

Chengdu Notary Office on-site inspection calculation Chengdu Notary Office on-site inspection calculation

In the end, through the on-site inspection and calculation of the Chengdu Notary Public Office, the Tianjin KR matching the Dongfeng Cummins ISD engine successfully completed the challenge with a fuel consumption of 16.62 liters per 100 kilometers, completely exceeding expectations!

Strength comes from the inner "core" large displacement and large horsepower

Dongfeng Tianjin KR six-cylinder series models are equipped with Dongfeng Cummins ISD engine. The 6.7-liter displacement engine can output 245Ps powerful power and 950N·m super-strong torque, which makes the vehicle have fast start, strong climbing, high economic speed and transportation efficiency. High features!

Dongfeng Tianjing KR six-cylinder series Dongfeng Tianjing KR six-cylinder series

In addition, the ISD engine adopts Bosch high-pressure common rail fuel system, the injection pressure can be up to 1600 bar, the injection timing and fuel injection quantity control is more precise, the combustion is more complete, the economic fuel consumption area is wide, the fuel economy is greatly improved, and the low speed is further improved. Performance, noise reduction and cold start perform better.

In addition to the ECU calibration optimization of the ISD engine, Tianjin KR also scientifically matches the gearbox and the rear axle to make the transmission efficiency higher and improve the fuel economy performance of the whole vehicle. The overall shape adopts CFD optimization design and the drag coefficient is as low as 0.498. Effective 2% fuel saving; standard low-resistance tires, can effectively save 3-4%! This is a comprehensive factor for Tianjin KR to win in the fuel-saving competition.

Matching the Tianjin KR of the Dongfeng Cummins ISD engine, whether it is in the fresh green pass or in the LTL cold chain, or in the field of material flow, it has played a great role, it can do a little more, save some more One step ahead, such a good car brings real benefits to the card friends.

Reading volume: Source: Chinese network of truck: Le Feng

"Gravity Die Casting. A permanent mould casting process, where the molten metal is poured from a vessle of ladle into the mould, and cavity fills with no force other than gravity, in a similar manner to the production of sand castings, although filling cn be controlled by tilting the die."

Gravity Die Casting

Sometimes referred to as Permanent Mould, GDC is a repeatable casting process used for non-ferrous alloy parts, typically aluminium, Zinc and Copper Base alloys.

The process differs from HPDC in that Gravity- rather than high pressure- is used to fill the mould with the liquid alloy.

GDC is suited to medium to high volumes products and typically parts are of a heavier sections than HPDC, but thinner sections than sand casting.

There are three key stages in the process.

  1. The heated mould [Die or Tool] is coated with a die release agent. The release agent spray also has a secondary function in that it aids cooling of the mould face after the previous part has been removed from the die.
  2. Molten metal is poured into channels in the tool to allow the material to fill all the extremities of the mould cavity. The metal is either hand poured using steel ladles or dosed using mechanical methods. Typically, there is a mould [down sprue" that allows the alloy to enter the mould cavity from the lower part of the die, reducing the formation of turbulence and subsequent porosity and inclusions in the finished part.
  3. Once the part has cooled sufficiently, the die is opened, either manually or utilising mechanical methods.

Advantages

  • Good dimensional accuracy
  • Smoother cast surface finish than sand casting
  • Improved mechanical properties compared to sand casting
  • Thinner walls can be cast compared to sand casting
  • Reverse draft internal pockets and forms can be cast in using preformed sand core inserts
  • Steel pins and inserts can be cast in to the part
  • Faster production times compared to other processes.
  • Once the tolling is proven, the product quality is very repeatable.
  • Outsourced Tooling setup costs can be lower than sand casting.

Gravity Casting Parts

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