At the end of the 19th century, the world's first diesel engine was born. Because its power and combustion efficiency far exceeded other internal combustion engines, it quickly became the core of promoting industrial development and was applied to power generation, automobiles, engineering machinery and other fields. With the emergence of technologies such as turbocharging, electronic fuel injection, and rotary pistons, the use of diesel engines has been further expanded. After more than a hundred years of development, it has become one of the most widely used internal combustion engines.

Nowadays, domestic environmental protection policies are becoming increasingly tightened, and many people's stereotypes of diesel engines as 'stupid, big, black and rough' are difficult to reverse. Therefore, when buying a car, diesel models are excluded from the choice of daily cars by some users. In fact, with the blessing of modern technology, diesel engines are not only powerful, durable and reliable, but also fully meet daily use needs in terms of environmental protection and comfort, which improves the convenience and riding comfort of users.

The Weichai WP2H 2.0T engine equipped in the SINOTRUK pickup is such an engine, with a maximum power of 140kW and a peak torque of 420N·m, and the strongest power performance in its class; it is built strictly in accordance with the durability and reliability standards of heavy-duty truck engines, and has been rigorously tested and verified, with considerable advantages in durability and reliability, and a maintenance interval of up to 1 year/20,000 kilometers. What is even more rare is that the three long-standing drawbacks of diesel engines due to emission restrictions, speed and torque limits, poor quietness, and difficulty in starting at low temperatures have been solved in one fell swoop through core technology research and development.

Urea dual-injection technology, emission standards meet and speed limits are avoided

After the implementation of the National 6b emission standard, some large-displacement pickups are facing the dilemma of suspension of production and sales. In order to meet the emission standards, the diesel pickups that are normally sold have been equipped with more complex after-treatment systems, resulting in frequent problems such as after-treatment system failures, increased fuel consumption, vehicle speed and torque limits, and frequent self-cleaning of DPF. Weichai WP2H 2.0T diesel engine post-treatment adopts DOC+SDPF+ HP/LP-EGR route, and its emission meets the National VI b standard, and it can reach the National VII level in the future. The urea dual-injection system precisely controls the injection amount and injection time of urea solution to ensure that the urea solution fully reacts with the exhaust gas, which can not only make the emission meet the standard and avoid speed limit, but also reduce the urea crystal blocking the nozzle, reduce the formation of carbon deposits, and reduce the probability of DPF system blockage. The self-cleaning interval of the DPF system can reach 700-800km, avoiding the inconvenience caused to users by frequent self-cleaning of the DPF system.

Submarine deep-sea silent technology, shielding noise interference

The special mechanical structure and combustion mode of diesel engines are one of the sources of noise in diesel models. For users, the poor silent level of tool vehicles can be tolerated, but family cars need a quiet and comfortable driving space. pickups are currently in the stage of transformation from home use to passenger use, and good silent performance has become one of the core competitiveness of a pickup. Weichai WP2H engine develops submarine deep-sea silent technology, adopts crankshaft offset + piston pin offset to reduce mechanical noise; independent main bearing cap + frame plate structure to improve overall NVH, and integrates post-compression muffler, acoustic sound insulation package, plastic cylinder head cover, unequal pitch sprocket and other technologies to reduce noise, and the engine adopts hydraulic suspension, which makes the noise level of the whole vehicle extremely low, idling noise ≤41 decibels, with the use of 5-fold silent technology of the whole vehicle, uniform speed noise 51-62 decibels, 4-6 decibels lower than the same level, allowing users to abandon noise and enjoy comfort, and the driving pleasure rises all the way in the quiet space.

Diesel ultra-low temperature starting technology, one-button start at nearly 40℃ below zero

Diesel has a high freezing point and poor fluidity, which makes it difficult to start in low temperature environment, which has become a congenital defect of diesel engines. Low temperature starting of diesel engines has been a problem that manufacturers have been working hard to overcome for a long time, and it is also the biggest trouble for users in the northern high-cold areas. Weichai WP2H engine has a unique diesel engine ultra-low temperature starting technology, which includes 6 major black technologies:

(1) Large-capacity cold zone special battery, which has the advantages of larger energy storage capacity, better temperature performance, and longer service life. It can still output the power required for starting normally in ultra-low temperature;

(2) High-power starter, even in the face of a severe cold environment of minus 40℃, it can still maintain high power output and provide strong energy support for engine starting;

(3) Engine cylinder preheating technology, the preheat plug temperature can reach more than 1000℃ within 3 seconds, realizing rapid thawing of diesel;

(4) Coalescing high-efficiency water separation fuel filter, which effectively improves the purity and cleanliness of the fuel, and has a fuel heating function to improve the engine's low-temperature starting ability;

(5) Bosch's fourth-generation ultra-high pressure common rail system, with an operating rail pressure of up to 2200Bar, more even fuel distribution, and the formation of finer oil droplets, more complete combustion, easier to ignite and start the engine;

(6) Low friction loss technology, using low-friction coated bearings, balance shaft needle bearings, roller rocker arms and DLC coated piston pins, piston rings, etc. to reduce friction work and make it easier to start at low temperatures.

Diesel is the main force in the domestic pickup consumer market. Its high torque, low fuel consumption and high reliability are suitable for commercial use in transporting goods, and are also suitable as off-road recreational vehicles. The Weichai WP2H 2.0T diesel engine equipped with the SINOTRUK pickup has overcome the three major shortcomings of diesel engines in all aspects, making diesel pickups more suitable for passenger and household use, and providing users with a truly all-round vehicle.