A “gasoline” machine for burning diesel? Analysis of 50-ring 1.9T RZ4E diesel engine

Because of national conditions and historical reasons, diesel engines are often not big in China, and don’t say private cars. However, the 50th bell diesel engine is considered a QUOT in the Chinese market; clear quot; Since the introduction of China’s production in the 1980s, after the introduction of China’s production, he quickly swept the China Light Diesel Market, so that many 4J series quot; improved quot; version.

With the implementation of the domestic pickup market, and the implementation of the national six emission standards, the 50th bell launched a new RZ4E diesel engine, comprehensively replacing The past 4J series. In the new D-Max just listed, the 1.9T RZ4e diesel engine is equipped, although the displacement is reduced but the power and torque are significantly improved, and the emission standards are also promoted to the country. six.

1.9T RZ4E Diesel Engine: Maximum Power 120kW, Maximum Torque 360nm

2.5T 4JK1 Diesel Engine: Maximum Power 100kW, Maximum Torque 320nm

The past 2.5T 4jk1 diesel engine is designed with short strokes, and the cylinder block (95.4mm) is greater than the stroke (87.4mm). This makes a greater extent of the advantages of diesel fuel, making the engine speed climb faster, thereby having a better response speed, which is also in line with the consistent impression of the diesel engine.

1.9T RZ4e diesel engine modulates long stroke design, in the case where the displacement is reduced, the cylinder stop is reduced to 80 mm, and the stroke is increased. To 94.4mm. This is a typical gasoline engine design idea, which can reduce the engine speed at the time of maximum torque output, achieve better fuel economy. However, this change has also caused high requirements for crankshafts and other components, and the overall manufacturing cost is higher.

Reduces friction, more silent, and more robust

So the 1.9T RZ4e diesel engine uses a new aluminum alloy material cran cable, which reduces the contact surface of the crankshaft and the link by small diameter design, and pin in the piston pin The injection port increases the low pressure piston ring and the diamond DLC coating, further reduces friction. According to related data, the RZ4E engine reduces the engine friction of about 37% to this, to improve the efficiency and durability of the engine.

In addition to the crankshaft, the RZ4e engine cylinder head, the flywheel housing is also made of aluminum alloy, and the cylinder head cover is a resin material. These have inherited the lightweight ideas of the past 4jk1. At the same time, the cast iron engine cylinder of the high frequency quenching process is also continued, and the durability characteristics of the 50th bell diesel engine is adhered to the factor of light weight. According to related data, the RZ4E engine fuel economy has increased by 19% compared to 4jk1, and the hardness of the cylinder increases by 13%.

Upgrade 2000BAR high pressure common rail

Diesel high-pressure common rail technology is equipped with a separate oil supply system through high pressure oil pump, pressure sensor, and ECU. Through the precise control of hydraulic pressure in the oil supply pipe, the fuel pressure and engine speed is detached, and the diesel engine oil supply pressure is affected by the engine speed, and the diesel engine has passed a large defect. In summary, the high-voltage common rail is an important technical application of diesel engine to truly enter the field of household vehicle, which has obvious help for reducing diesel engine noise, and improving the fuel economy of diesel engine.

4JK1 The 1800 bar high-voltage common rail system supplied by the electricity is used at the time, and BOSCH supply is used in the latest RZ4E engine. The 2000BAR high-pressure common rail system, the fuel atomization effect is more excellent, more combustion is more fully, and further expands the technical advantages of high pressure common rail.

Continuing variable turbocharger

The variable section turbine supercharger employed in the RZ4E engine can also continue to the RZ4E engine, which can be based on different conditions.Adjust the opening of the turbine blade. That is, at low speed, the turbine inlet area is reduced, increasing the exhaust speed, and speeds up the turbine speed. Under the high rotation speed is an increase in the turbine inlet area, the exhaust speed is slow, and the turbine speed is relatively reduced. Allows the engine to maintain efficient power output at a high and low speed.

At the same time, the exhaust gas circulation system of the RZ4e engine is designed with a bypass valve, in the cold environment, high temperature exhaust gas can bypass the intercooler. Accelerate the efficiency of engine heaters to ensure faster access effective operating temperature. Under the operating conditions of the air excess combustion temperature, the exhaust gas is cooled through the intercooler, inhibits the combustion temperature, and greatly reduces the emissions of exhaust gas particles.

The RZ4E engine also applies more gasoline engine techniques to, such as hydraulic valve gap adjusters. The system can effectively adjust the gap between valves to ensure better valve gap position. The timing chain drive camshaft is also reserved, and the small neck design mentioned earlier is used to further reduce the noise, and ensure the service life of the engine, no need to change the timing belt.

Summary: It can be seen at the 4jk1 engine era, and the 50th bell has introduced a variable section turbocharger, high pressure common rail fuel system, and At the timing chain drive, there is a DOHC american petrol configuration such as a dual-cam axle plexival. The RZ4E engine is reserved while retaining these design advantages, directly adopting a long piston stroke design to further close to the gasoline engine. And through the application of new materials and technologies, reduce engine friction and enhance engine efficiency. Strengthen the advantages of diesel engines in fuel economy and durability, while reducing noise and pollutant emissions, further close to the passengerization ideas. As the RZ4E engine is further assembled on the fifty-Bozu model, it helps to be compatible with the commercial field, which is also in line with the current trend of the current pick-up policy.