1. Different throttle opening control

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. It is controlled by manually controlling the throttle opening knob and manually selecting the power mode switch. 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 and speed, pilot operated oil valve of each operating valve, working mode of the excavator, water temperature, oil temperature and other signals. Then, according to the driver's operation idea, the computer ECU determines a better throttle opening position according to 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 direct injection engine technology is mature, and the product residual value rate is high (that is, the value at the end of the use of the direct injection excavator), which is relatively stable.

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 EFI diesel engine completely separates the generation of injection pressure from the injection process in a closed environment composed of high-pressure oil pump, pressure sensor and 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 the direct injection diesel engine is low, the torque generated by the engine 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 EFI diesel engine can match the hydraulic system well.

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, but the fuel can not be completely burned, the fuel consumption is large, and it is not environmentally friendly. EFI engines require relatively high oil quality, sufficient fuel combustion, fuel saving and environmental protection.