Injector, plunger, nozzle, outlet valve, diesel engine parts Injector, plunger, nozzle, fuel valve, diesel engine parts: why the engine plunger vice, fuel valve, fuel injector and other fine The injector nozzle used in cars now is actually a simple solenoid valve, when the solenoid coil is energized, the suction force is generated, the needle valve…
The fuel oil circuit of a diesel engine can be divided into a negative pressure oil circuit, a low pressure oil circuit and a high pressure oil circuit. The negative pressure oil circuit refers to the oil circuit from the fuel tank to the fuel pump. When the engine is working, the pressure in this…
There is no doubt that diesel is the main force in the agricultural sector. The Diesel Technology Forum shows that more than 60% of agricultural equipment in the United States is powered by diesel, and 96% of the large trucks that transport agricultural products to logistics centers and final destinations are powered by diesel engines.…
one. The cause of the failure The internal failure of the TFI4 air flow sensor leads to an error in the intake model, which affects the opening of the EGR valve and the intake throttle valve, resulting in insufficient engine air intake, and abnormal combustion in the cylinder, which not only causes loss of engine…
Many people think that understanding circuit diagrams is the most difficult part of learning electrical systems, because circuit diagrams are schematic diagrams of some components, and they simply don’t understand what these diagrams express. Moreover, a circuit diagram usually has dozens or even hundreds of components, and their connections cross vertically and horizontally, and their…
Reception process 1. The registration requirements are complete (especially the time and the number of kilometers are invalid for the odometer. If the customer does not agree to repair the factory written instructions, it will be calculated at 300 kilometers per day after leaving the factory, and 20,000 kilometers will exceed the warranty period.) 2.…
The fuel oil circuit of a diesel engine can be divided into a negative pressure oil circuit, a low pressure oil circuit and a high pressure oil circuit. The negative pressure oil circuit refers to the oil circuit from the fuel tank to the fuel pump. When the engine is working, the pressure in this…
Case 1 Trouble symptoms: unable to go up at high speed, high fuel consumption, black smoke or basket smoke from the exhaust pipe. The cause of the failure: the intake pipe is leaking or blocked by foreign matter. Nature of failure: mechanical failure. Treatment method: find out the location of the air leakage, eliminate the…
Case 1 Trouble symptoms: The starter and the engine both have normal starting speeds, but they do not catch fire; or sometimes they can catch fire after many long periods of starting. The cause of the failure: There is air in the fuel line. Nature of failure: mechanical failure. Treatment method: fuel line drain Failure…
Case 1 Trouble symptoms: unable to go up at high speed, high fuel consumption, black smoke or basket smoke from the exhaust pipe. The cause of the failure: the air intake pipe is leaking or blocked by a foreign body. Nature of failure: mechanical failure. Treatment method: find out the location of the air leakage,…
With the arrival of Euro 4, Euro 5, and Euro 6, the communication lines on the car have also changed. From the previous K, single set of can lines, to the current 2, 3, and even more than 4 sets of cans. . The increase in communication lines has brought great challenges and inconveniences to…
The valve adjustment of multi-cylinder engines is generally adjusted in two adjustments. The method is: for a general 4-cylinder engine, the ignition sequence is 1-3-4-2, first align the top dead center mark of cylinder 1, and then adjust the intake and discharge of cylinder 1. , 2 cylinders in, 3 rows. Align the top dead…
One. The connecting hose between the air flow meter and the throttle body is not sealed. The vane-type air flow meter integrates the functions of the fuel pump switch, air temperature sensor and CO adjustment. Therefore, a good seal for the connection of the air flow meter and the throttle body is a necessary condition…
1. Oxygen sensor The location is on the exhaust pipe, and the oxygen sensor is faulty, so that the ECU cannot know whether the amount of gasoline injected is correct, and the concentration of the mixer is either too rich or too lean, and the combustion is insufficient, reducing engine power and increasing emission pollution.…
The cylinder gasket is mainly used to ensure the sealing between the cylinder block and the cylinder head joint surface to prevent air leakage and water leakage. Cylinder head gasket is in direct contact with high temperature and high pressure gas, so it is easy to be ablated during use, especially around the cylinder mouth…
1 Aikelan-DCU jumper schematic diagram 1. Physical jumper diagram 2. Schematic diagram of jumper wires DCU power supply + 4M pin, ground 4L pin, ignition J1 pin, diagnostic CANH-2A pin, and diagnostic CANL-1A pin. 3. DCU appearance diagram 2 Bosch DNOx2.0-DCU jumper schematic diagram 1. Physical jumper diagram 2. Schematic diagram of jumper…
Engineers are working to improve the fuel efficiency of heavy-duty diesel engines while minimizing pollution to reduce energy consumption and ensure the sustainable development of these industries. To this end, researchers at the U.S. Department of Energy (DOE) Argonne National Laboratory in Leman, Illinois, collaborated with Caterpillar. Using Argonne’s high-performance computing resources, researchers have developed…
Trouble phenomenon: A Zhongtong LCK6125 bus was equipped with a Weichai WP10.360 diesel engine. The throttle failed during driving, the idle speed was increased to 1100r/min, and it entered the Limphome state. Troubleshooting: When the idling speed is 1100r/min, most of the faults are caused by the electronic throttle or the throttle circuit. Connect the…
According to the requirements of current regulations, when a vehicle breaks down, Euro 5 and Euro 6 models will have significantly different performance. The National V model will usually not have the torque limit until 36 hours after the vehicle fails, and the speed limit will not appear. The requirements for new Euro VI vehicles…
Case 1 Trouble symptoms: The starter and the engine both have normal starting speeds, but they do not catch fire; or sometimes they can catch fire after many long periods of starting. Cause: There is air in the fuel line. Nature of failure: mechanical failure. Treatment method: exhaust air from the fuel line. Failure analysis:…
This set of tools includes, injector nozzle tightening cap removal tool, 3126B valve plate bolt screwdriver, Multi-function screwdriver handle, 6 types of screw heads, long and short screw rods, long and short screw rods, flexible screw rods, labor-saving wrenches. Injector nozzle tight cap removal tool It is suitable for the removal of the nozzle…
In the TICS fuel injection pump electronic control system, ECU (engine control unit) has a fault self-diagnosis function, which can detect the working conditions of each part of the control system. When the ECU detects the fault signals from the sensors and actuators, it immediately lights up the “CHECKENGINE” (check engine, also called fault self-diagnostic…
Bosch 6.5 urea pump is an airless urea pump launched by Bosch in response to the Asian post-processing market. Compared with the previously launched Bosch 2.2 urea pump, it reduces the working pressure of the urea pump (from 9bar to 5bar). As shown in the figure, the urea pump sucks the urea solution from the…
Key points for troubleshooting of injector blockage: 1. No fault code or fault code content has nothing to do with the injector; 2. The rail pressure can reach above 25MPa when starting; 3. There is a pulse voltage signal in the injector circuit. Key points for troubleshooting of injector jams: 1. No fault code or…
Precautions for disassembly and assembly of CP2.2 Try to use a suction device for cleaning The color of the seal ring of the sub-cylinder element: the upper part, red; the lower part, gray Each sub-cylinder should be marked before disassembly, and the box where each sub-cylinder component is placed should be marked accordingly The relationship…
1. Fuel supply system structure The bulldozer is equipped with a Chongqing Cummins NT855 diesel engine, which uses a PT fuel supply system with gear pump low-pressure fuel supply and injector high-pressure injection. The gear pump feeds fuel into the fuel injector. When the diesel engine camshaft (shares a camshaft with the diesel engine intake…
China’s automobile industry development After years of development, China’s automobile industry has made significant progress in many technologies, especially in recent years, some relatively outstanding domestic engines have emerged one after another. Take the diesel engine as an example, the core components of the engine, and the development of domestic diesel engine technology. The engine…
1. Germany: Car license plates are born out of love Do you know how the car license plate was born? It is said that a long time ago, cars did not have license plates, and the first license plate was related to love. In 1910, Rudolf Hertog, a big business man in Berlin, Germany, drove…
1Vehicle weakness, normal urea consumption Trouble phenomenon: The vehicle owner responded that the vehicle was weak and the urea consumption was normal, and the muffler could be found to emit a small amount of white smoke after refueling. Fault analysis: read the fault code with the diagnostic instrument to indicate that the engine emissions exceed…
Shenyang Hanpu Machinery Co., Ltd. provides you with spare parts for Caterpillar injectors C7, C9, and C-9 diesel engines. Products include Caterpillar injector assembly, solenoid valve, control valve, oil booster valve, intermediate valve, fuel injector and repair kit. Leading technical advantages and advanced processing technology ensure the quality and performance of Caterpillar engine parts. Our…
● Basic introduction of engine sensor Sensors on electronically controlled diesel engines can be described as diverse. The sensor types are roughly divided into three categories: pressure sensors, temperature sensors, speed and position sensors. There are about ten types of subdivided types. Today I will introduce you to diesel engines. Sensors. This includes: oil pressure…
Usually we talk about the EGR system, the understanding is the exhaust gas recirculation system, by introducing exhaust gas into the combustion chamber, thereby reducing the peak of engine combustion, to achieve the purpose of reducing NOx emissions. Diesel vehicles use an external system, that is, a pipeline is connected between the exhaust pipe and…
At the end of March 2021, Weichai Power Co., Ltd. announced a strategic cooperation with FISCHER Spindle Group Ltd (hereinafter referred to as “Swiss Fast Group”) in Switzerland, investing in its fuel cell air compressor business and establishing a joint venture company in China. China has deployed its fuel cell air compressor business. Fuel cell…
At the NTEA work truck exhibition in 2021, Hino Trucks announced its intention to produce medium and heavy Hino trucks with Cummins engines, which will be sold in North America. As a result of this announcement, Hino stated that it will provide Cummins B6.7 and L9 engines for Hino’s L and XL series models by…
1. The urea filter should be replaced every 5W km or once a year. The frequency of replacement of the urea filter should be adjusted appropriately according to the cleanliness of the urea solution. Pay attention to the cleaning and maintenance of the urea irrigation and ventilation pipeline, and clean up the urea crystal and…
One： circuit reason The failure to start the car due to a circuit failure is mainly manifested in the fact that there is no response when turning on the ignition switch or the starting motor speed is too low, and it can feel weak. If these two phenomena occur, it can be roughly judged as…
1.engine 2.Timing system 3.Intake system 4.Exhaust system 5.Fuel System 6.cooling system 7.Spark plug
1. What is the performance of unplugging the fuel metering unit? All the fuel enters the common rail pipe, causing the rail pressure to be too high, the pressure limiting valve opens, and the limp mode is entered. It is also easy to cause the oil temperature to rise, which is detrimental to the entire…
Key points for troubleshooting of injector blockage: 1. No fault code or fault code content has nothing to do with the injector; 2. The rail pressure can reach above 25MPa when starting; 3. There is a pulse voltage signal in the injector circuit. Key points for troubleshooting of injector jams: 1. No fault code or…
Eaton and Tenneco announced a joint development agreement between Eaton Automotive Group and Tenneco Clean Air Business Group to produce an integrated exhaust thermal management system designed to enable commercial truck and light vehicle manufacturers to meet upcoming Coming emission regulations. Dmitri Konson, vice president of global engineering for Tenneco’s clean air business, said: “Tenneco…
Some failures will inevitably occur when the equipment is used for a long time. After investigation, it is found that there are three main types of failures: circuit failure, mechanical failure and external interference. 1. Circuit failure When the power is turned on, the ABS indicator light should be on, and once the vehicle speed…
Today I am going to talk about hydrogen fuel. So what will the topic of hydrogen fuel be so hot in the last two years? The background is that in December 2020, Chinese President Xi Jinping delivered an important speech at the Paris Climate Summit and announced a series of independent contributions from China. New…
Common maintenance methods for electronically controlled diesel engines 1. First outside and then inside When the engine malfunctions, first check the possible malfunctioning parts other than the electronic control system. This can avoid a fault that is not related to the electronic control system, but the system’s sensors, computers, actuators, and wiring are complicated and…
Injector total oil return test Detection Tool Fuel return hose (part number 3164618) 2 open wrenches (17# and 19#) Measuring cylinder (100ml range) Torque wrench (with 22# fork head) INLINE (INSITE is a kind) Computer with INSITE service software Barrels for collecting fuel Steps Install the oil return hose Use a wrench (19#) to remove…
1) Yuchai unit pump R01/R02 Diagnostic location: in front of the co-pilot/in the relay box/near ECU/above the accelerator pedal/near the instrument panel/in the fuse box near the left front wheel, etc.; Diagnosis seat shape and configuration: Shape: Flat 4-pin -> AK-35 is recommended; Configuration: power cord (1), ground wire (1 or), signal wire (2); Note:…
The common rail injection system of diesel engines has a common feature, that is, there is a common high-pressure fuel accumulator, called common rail. The high-pressure fuel supply pump is only responsible for supplying high-pressure fuel to this accumulator, and is not responsible for controlling fuel quantitative and injection timing. The task of managing fuel…
In the TICS fuel injection pump electronic control system, ECU (engine control unit) has a fault self-diagnosis function, which can detect the working conditions of each part of the control system. When the ECU detects the fault signals from the sensors and actuators, it immediately lights up the “CHECKENGINE” (check engine, also called fault self-diagnostic…
Fault code: SFC 161 Fault description: XDRP_A (5V) voltage is high The 5V external supply voltage is the power source for many sensors and components in the system. Whether this voltage is stable or not seriously affects the accuracy of the sensor, so it is often monitored by the ECU. The ECU can determine whether…
There are two phenomena of insufficient engine power, uneven speed, and thick black smoke from the exhaust pipe: One is continuous exhaust of black smoke; the other is intermittent exhaust of black smoke, and the engine shakes. ⑴The reason for the lack of engine power and continuous black smoke discharge is that most or all…
Key points for troubleshooting of injector blockage: 1. No fault code or fault code content has nothing to do with the injector; 2. The rail pressure can reach above 25MPa when starting; 3. There is a pulse voltage signal in the injector circuit. Key points for troubleshooting of injector jams: 1. No fault code or…
Common faults and solutions of fuel injectors The fuel injector is a precision device with very high precision (the most precise of which is the most precise needle valve and needle valve body), which mainly accepts the fuel injection pulse signal sent by the ECU, and precisely controls the fuel injection volume. Generally, fuel injectors…
HEUI technology introduction and technical advantages Introduction to HEUI The hydraulically driven electronically controlled unit injector (HEUI, also called medium-pressure common rail injector) fuel system uses engine lubricating oil pressurized to a high pressure to drive the injector plunger to produce high-pressure diesel fuel. technology. This technology is the same as the high-pressure common rail…
Six-cylinder engine diesel pump The high-pressure fuel pump is the main component of the diesel fuel supply system. Its basic function is to provide high-pressure diesel fuel to the injectors regularly and quantitatively. Whether the entire diesel engine can operate normally, the diesel engine high-pressure oil pump plays a vital role. Today, we will…
As a leader in the non-road engine industry, Caterpillar has begun to launch engines that meet the fourth stage in recent years. Today I want to introduce to you the engine of the 349F excavator C13. I believe that many maintenance personnel have seen this engine, and today we will introduce the engine’s fuel system…
Cummins HPI-TP fuel system introduction (Part Three) Maintenance points of HPI-TP injector n the second article of Cummins HPI system introduction, we gave a very detailed introduction to the structure and working principle of HPI injectors. If the working principle of your injector is still unclear, please be sure to return Go to the…
Cummins HPI-TP fuel system introduction (Second article) HPI injector structure and working principle After the introduction of the Cummins HPI-TP integrated fuel supply module in the previous article, everyone should have a good understanding of how fuel is supplied to HPI injectors. The amount of fuel entering the metering cavity and timing cavity of the…
Integrated fuel supply module Dear colleagues in the fuel system maintenance industry, many people are consulting the assembly on how to check and repair Cummins HPI injectors and the corresponding fuel system. After doing a lot of research and practical work, here is the relevant content for everyone, I believe it will help you to…
In reality, there are many reasons for starting difficulty in maintenance. For example, if the injector is defective or the metering unit is faulty, it may cause the vehicle to start difficult or even unable to start, but sometimes the problem may surprise you. Although the case shared by the small rail today is not…
A fault that may not be repaired normally No trouble code There is no problem with the line No problem with parts Can you guess the point of failure? Failure case Model: Liuqi Engine: Cummins Emission standard: National IV Computer board: CM2150 Trouble phenomenon: cruise failure Troubleshooting steps Step 1: Read the fault…
1) Yuchai unit pump R01/R02 Diagnosis location: in front of the co-pilot/in the relay box/near ECU/above the accelerator pedal/near the instrument panel/in the fuse box near the left front wheel, etc.; Diagnosis seat shape and configuration: 1. Flat 4-pin -> AK-35 is recommended; Configuration: power cord (1), ground wire (1 or), signal wire (2); Note:…
The valve clearance usually changes due to the wear and deformation of the parts of the valve train. If the clearance is too large, the valve lift will be insufficient, causing insufficient intake, incomplete exhaust, and abnormal noise. If the clearance is too small, the valve will not close tightly, and it will cause air…
What is high pressure common rail? High-pressure common rail technology refers to a fuel supply method that completely separates the generation of injection pressure and the injection process in a closed-loop system composed of high-pressure fuel pumps, pressure sensors and ECUs. The high-pressure fuel pump delivers high-pressure fuel to the public fuel supply. Through precise…
Hino P11C, Hino J08E, Nissan MD9M Denso System Diagnosis location: inside the relay box, above the accelerator pedal, near the instrument panel, etc.; Diagnosis seat shape and configuration: 1. Round 16PIN->use AK-33; Configuration: power cord (1), ground wire (1), signal wire (1, 8th position); Note: Pay attention to the difference between WABCO’s ABS diagnostic interface…
The needle valve of the fuel injector burns to death The phenomenon that the needle valve of the fuel injector burns to death is that when the engine is working, when the pressure regulating screw on the fuel injector is tightened or loosened, the working condition of the engine does not change. In addition, due…
one. characteristics and general rules of car wiring Generally, a single-wire system, parallel connection of electrical equipment, grounding of the negative electrode, and lines with different colors and numbers are used to distinguish the lines, and are divided into several main lines with the ignition switch as the center. 1. Battery positive wire: lead through…
With the implementation of emission standards across the country, as an important technical means to achieve emissions, electronically controlled fuel injection technology has entered people’s attention. Today, engines with electronically controlled fuel injection technology have been on the market for a long time. In daily life, many people are accustomed to calling electronically controlled engines…
There are two phenomena of insufficient engine power, uneven speed, and thick black smoke from the exhaust pipe: One is continuous exhaust of black smoke; the other is intermittent exhaust of black smoke, and the engine shakes. ⑴ The reason for the lack of engine power and continuous black smoke discharge is that most or…
Sensors on electronically controlled diesel engines can be described as diverse, roughly divided into three types: pressure sensors, temperature sensors, speed and position sensors. There are about ten types of subdivisions. Today, I will introduce most of the necessary sensors for electronically controlled diesel engines. 1.Crankshaft speed sensor Installation location: on the flywheel housing, next…
ABS system 1. Comet ABS Diagnosis location: behind the driver, above the relay box, etc.; Diagnosis seat shape and configuration: 1. Flat three-pin -> AK-35 is recommended; Configuration: power supply (1), ground wire (1), signal wire (2); Diagnostic line identification method: 1. Special mark: One of the signal lines is between -9V ~ -5V; 2.There…
Natural gas system: 1) Yuchai Natural Gas Diagnosis location: in front of the co-pilot/in the relay box/near ECU/above the accelerator pedal/near the instrument panel/in the fuse box near the left front wheel, etc.; Diagnosis seat shape and configuration: 1. Square 4-pin ->AK-46; Configuration: power cord (1), ground wire (1 or), signal wire (2); Diagnostic line…
The phenomenon of diesel engine runaway is the phenomenon of diesel engine running, especially in the process of small and medium load operation, due to some reasons, the diesel engine speed increases sharply, overspeeding without automatic control, exhaust smoke, sound and vibration. After the occurrence of “speeding”, as the speed of the diesel engine increases,…
1. Damage to the intake pressure and temperature sensor: ①ON gear, the engine fault light is always on; ②A small amount of black smoke is emitted when the accelerator is stepped on the spot, and a lot of black smoke is quickly accelerated; ③The engine is sluggish; ④ Trouble code: P01D6 (the voltage of the…
Ecofit urea pumps are matched in many vehicles, such as Dongfeng and Auman. When repairing a car, the chance of encountering this urea pump is still very large, so in this article, Xiaogui will summarize the common faults of this urea pump for the masters. This pump is an air-driven urea pump, so the fault…
Diesel is mixed with air in the engine, and the burned exhaust gas is discharged from the exhaust pipe. If the vehicle malfunctions and fuel combustion deteriorates, it will emit black smoke. In fact, this black smoke is soot particles that are not completely burned. The fault points that cause the vehicle to emit black…
Common Rail Parts Bosch Control Valve Bosch Injector Bosch Injector Shaft Bosch Nozzle
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