直喷式发动机和电喷式发动机是目前工程机械设备中常用的两种发动机类型。我们了解长臂挖掘机的使用也需要了解其发动机的知识，所以下面长臂挖掘机出租厂家带您了解一下长臂挖掘机直喷式和电喷式发动机的区别。
Direct injection engine and electronic injection engine are two types of engines commonly used in construction machinery equipment. We also need to know the engine to understand the use of long arm excavators, so the following long arm excavator rental manufacturers will show you the difference between direct injection and electronic injection engines of long arm excavators.
1、油门开度控制的不同
1. Different throttle opening controls
直喷式发动机是由转速控制，是人手操控油门开度旋钮和人工选择动力模式开关来控制油门的开度，整体构造比较简单。
The direct injection engine is controlled by the speed. The throttle opening knob is manually operated and the power mode switch is manually selected to control the throttle opening. The overall structure is relatively simple.
电喷式发动机由控制器检测出以下信号：油门开度旋转角度、动力模式开关、发动机转速、油泵压力转速、各个操作阀的先导操控油阀、挖掘机的工作模式，以及水温、油温等信号。然后，电脑ECU按照驾驶员的操作想法，根据不同的动力模式和工作方式，负载情况和操作情况来确定一个较佳的油门开度位置。同时，电脑ECU还能控制油门开度的变化速率，让发动机能发挥出较佳的性能。
The controller of the EFI engine detects the following signals: throttle opening rotation angle, power mode switch, engine speed, oil pump pressure speed, pilot operated oil valve of each operating valve, working mode of the excavator, water temperature, oil temperature and other signals. Then, the computer ECU determines a better throttle opening position according to the driver's operation idea, different power modes and working modes, load conditions and operation conditions. At the same time, the computer ECU can also control the change rate of the throttle opening, so that the engine can play a better performance.

2、喷油器开启的不同
2. Different fuel injector opening
直喷式发动机工艺成熟，产品残值率高（即直喷挖掘机用到结束时的价值），相对保值。
The process of the direct injection engine is mature, and the residual value rate of the product is high (that is, the value of the direct injection excavator at the end of its use).
电喷式柴油发动机是在高压油泵、压力传感器、电脑控制单元（ECU）组成的封闭环境中，把喷射压力的产生和喷射过程完全分开供油的。
The electronic injection diesel engine supplies fuel completely separately from the injection pressure generation and injection process in a closed environment composed of a high-pressure fuel pump, a pressure sensor and a computer control unit (ECU).
3、维修方面也不同
3. Maintenance is also different
从实际用户体验来看，直喷式柴油发动机的日常维修保养费用低，发动机工作时产生的扭矩较大，动力强劲。
From the actual user experience, the daily maintenance cost of direct injection diesel engine is low, the torque generated by the engine during operation is large, and the power is strong.
电喷式柴油发动机能够做到和液压系统良好的匹配。
The electronic injection diesel engine can achieve a good match with the hydraulic system.
4、方面的不同
4. Differences in energy conservation and environmental protection
直喷式发动机对油品的适应力强，但是燃油不能完全燃烧，用油量大，不。电喷式发动机对油品质量要求相对较高，燃油燃烧充分，节油。
The direct injection engine has strong adaptability to oil products, but the fuel cannot be completely burned, the fuel consumption is large, and it is not environmentally friendly. EFI engines have relatively high requirements for oil quality, fuel burning is sufficient, fuel saving and environmental protection.
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The above is a detailed introduction to the leasing of the extended boom excavator, and we hope it will be helpful to you. If you have any questions, please contact us. We will provide services for you with our attitude //www.wondgo.com/