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Diesel engine power estimation method

A diesel engine and power technology, applied in the direction of mechanical equipment, engine control, machine/engine, etc., can solve the problems of difficult installation of sensors, poor signal quality, etc., and achieve the effect of improving practicability, convenience, and accuracy

Pending Publication Date: 2021-10-08
ARMOR ACADEMY OF CHINESE PEOPLES LIBERATION ARMY
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  • Abstract
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Problems solved by technology

[0006] However, with the application of power transmission integration technology, the diesel engine and the transmission device are integrated into one, and there is no space to install the torque sensor. There will be problems such as difficult installation of the sensor and poor signal quality when testing the output power of the diesel engine in a real vehicle. Therefore, the diesel engine under real vehicle conditions The measurement of output power becomes a difficult point

Method used

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Embodiment

[0087] According to the estimation method, taking a certain type of diesel engine as an example, the plunger diameter of a certain type of diesel engine is 10mm, the plunger parameter is 2.74mm, the constant is 1.122, the ring gear diameter is 28.6mm, and the fixed speed is determined to be 1500r / min. The mechanical loss efficiency of the new diesel engine is 17.1KW. The displacement of the refueling gear rod is 3mm detected through the no-load operation of the diesel engine. The calculated no-load fuel consumption is 0.874g / s. The maximum refueling position of the diesel engine at 1500r / min. The displacement is 15mm, the calculated maximum fuel supply is 15.8g / s, and the calculated power value is 292.1KW. Compare the calculated power value with the external characteristic diagram such as image 3 As shown in the figure, the abscissa in the figure represents the speed of the diesel engine, and the ordinate represents the power of the diesel engine; the dots in the figure repre...

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Abstract

The invention further discloses a diesel engine power estimation method. According to the diesel engine oil injection device structure and the oil supply principle, the corresponding relation between an oil filling rack bar and the oil consumption is obtained; the mechanical loss power of a diesel engine at the specified rotating speed is estimated according to the deceleration process of the diesel engine in the non-oil-supply state; and on the premise that the oil consumption, the no-load fuel consumption and the mechanical loss power are known, the output power of the diesel engine at the current oil consumption or the current oil filling rack bar position and the current rotating speed is estimated through an oil consumption line method. The method overcomes the problems of difficult sensor installation, poor signal quality and the like when the output power of the diesel engine is tested in a real vehicle, and can realize the real-time estimation of the output power of the diesel engine by using the current operation condition of the diesel engine.

Description

technical field [0001] The invention relates to the technical field of diesel engines, and more specifically, the invention relates to a method for estimating power of a diesel engine. Background technique [0002] Power is the work done (consumed) by the power machine within a unit of time. Any active machine will have output power, including gasoline engines and electric motors. Diesel engines are no exception, and the output power of diesel engines is an important indicator of the technical status of diesel engines. [0003] In the prior art, there are generally two methods for power testing of diesel engines, one is the method of testing on a test bench, and the other is a method of testing on a real vehicle. [0004] In the stage of equipment service, the method based on bench test is more difficult to implement. [0005] The real vehicle test method is to install sensors on the real vehicle for testing, usually by installing strain gauges between the power output end ...

Claims

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Application Information

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IPC IPC(8): F02D45/00
CPCF02D45/00F02D2200/10
Inventor 刘艳斌乔新勇董意张小明靳莹张少亮
Owner ARMOR ACADEMY OF CHINESE PEOPLES LIBERATION ARMY
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