Oil consumption calculation method during loading operation of loading machine

Abstract

The invention relates to the technical field of loaders, and discloses a method for calculating oil consumption during loading operation of a loader, which comprises the following steps of: 1, arranging a rotating speed sensor and a torque sensor on an engine, and arranging a pressure sensor at a big arm oil cylinder; 2, the working state is judged according to the rotating speed N0 of the engine, the running torque T1 of the engine and the inlet and outlet pressure difference Pdiff of the large arm oil cylinder; 3, if N0 is larger than or equal to engine idle and smaller than N1, T0 is larger than 0 and smaller than T1, and Pdiff is smaller than P1, oil consumption FC1 is recorded through the ECU; 4, if N1 < N0 < Nmax, T1 < T0 < T2 and Pdiff > P1, oil consumption FC2 is recorded through the ECU; 5, if N0 is larger than engine idle and smaller than N1, T0 is larger than T1 and smaller than T2, and Pdiff is smaller than P1, the large arm oil cylinder pressure difference Pi and oil consumption FC3 are recorded through the ECU; and 6, searching or calculating required oil consumption data according to the recorded data. According to the method, various oil consumption data of the loader can be accurately obtained, and the economic oil consumption area of the loader can be found, so that the loader has better dynamic property and economical efficiency under various working conditions.

Description

Technical Field

[0001] The invention relates to the technical field of loaders, and in particular to a method for calculating fuel consumption of a loader during load-bearing operation. Background Art

[0002] Loaders are mainly used in shoveling and other market segments, and are responsible for shoveling materials from material points to logistics vehicles. In one working cycle, there are four main working states: ① moving forward with no load to the cargo, ② lifting the bucket and shoveling materials, ③ moving backward with full load and moving to the logistics vehicle, and ④ lifting the bucket and unloading.

[0003] Generally, when calculating fuel consumption, car owners can convert the average fuel consumption of a single operation in working states ②③④ by accumulating fuel consumption and the number of operations. However, each working state has different work and fuel consumption. The above method cannot determine the specific fuel consumption of each working state, which is not conducive to finding the lowest fuel consumption area for each working state, and thus cannot guarantee better power and economy under various working conditions. Summary of the invention

[0004] The technical problem to be solved by the present invention is how to determine the specific fuel consumption of each working state of the loader.

[0005] In order to solve the above technical problems, the technical solution of the present invention is to provide a method for calculating the fuel consumption of a loader during load-bearing operation, comprising the following steps:

[0006] Step 1: Install a speed sensor and a torque sensor on the engine flywheel, and install a pressure sensor on the boom cylinder;

[0007] Step 2: After the loader is started, the working state is determined according to the engine speed N0, the engine running torque T1 and the inlet and outlet pressure difference Pdiff of the boom cylinder, and the corresponding data is recorded;

[0008] Step 3: If engine idle≤N0<N1, 0<T0<T1, Pdiff<P1, it is determined that the loader is in the working state of ① moving forward without load to the cargo, and the fuel consumption FC1 is recorded by the ECU, where:

[0009] engine idle is the engine idle speed; N1 is the engine speed corresponding to the maximum speed limit in the loader's working area; T1 is the minimum torque required for the loader to travel normally; P1 is the pressure difference error caused by the slight swing of the hopper when the boom is lifted;

[0010] Step 4: If N1<N0<Nmax, T1<T0<T2, Pdiff>P1, it is determined that the loader is in the working state of ② bucket lifting and shoveling or ④ bucket lifting and unloading, and the fuel consumption FC2 is recorded by the ECU, where:

[0011] Nmax is the rated speed of the engine; T2 is the rated output torque of the engine;

[0012] Step 5: If engine idle<N0<N1, T1<T0<T2, Pdiff<P1, it is determined that the loader is in the working state of ③ fully loaded and moving to the logistics vehicle, and the boom cylinder pressure difference Pi and fuel consumption FC3 are recorded through the ECU;

[0013] Step 6: After the work is completed, find or calculate the required fuel consumption data based on the recorded FC1, FC2, FC3 and Pi.

[0014] Optionally, the inlet and outlet pressure difference Pdiff of the boom cylinder in step 2 and the pressure difference error P1 caused by the slight swing of the bucket when the boom is lifted are calculated by subtracting the return oil pressure Pout from the boom oil inlet pressure Pin.

[0015] Optionally, the calculation formula for fuel consumption FC1, FC2 and FC3 is:

[0016] Hourly oil volume (kg / h) = cycle injection volume (mg / hub) * speed * number of cylinders / 1000 / 60 / 2 * 3.6.

[0017] Optionally, in step 4, FC2 is the total fuel consumption of the working states of ② bucket lifting and shoveling or ④ bucket lifting and unloading. The actions of the two working states are opposite, and the fuel consumption of a single working state is FC2 / 2.

[0018] Optionally, in step 5, the number of recorded boom cylinder pressure differences Pi is the number of working cycles of the loader.

[0019] In summary, the present invention can accurately obtain various fuel consumption data of the loader by recording the fuel consumption of each working state of the loader's working cycle, which is conducive to finding the economical fuel consumption zone of the loader, so that the loader has better power and economy under various working conditions. DETAILED DESCRIPTION

[0020] The invention discloses a method for calculating the fuel consumption of a loader during load-bearing operation, comprising the following steps:

[0021] Step 1: Install a speed sensor and a torque sensor on the engine flywheel, and install a pressure sensor on the boom cylinder;

[0022] Step 2: After the loader is started, the working state is determined according to the engine speed N0, the engine running torque T1 and the inlet and outlet pressure difference Pdiff of the boom cylinder, and the corresponding data is recorded;

[0023] Step 3: If engine idle≤N0<N1, 0<T0<T1, Pdiff<P1, it is determined that the loader is in the working state of ① moving forward without load to the cargo, and the fuel consumption FC1 is recorded by the ECU, where:

[0024] engine idle is the engine idle speed; N1 is the engine speed corresponding to the maximum speed limit in the loader's working area; T1 is the minimum torque required for the loader to travel normally; P1 is the pressure difference error caused by the slight swing of the hopper when the boom is lifted;

[0025] Step 4: If N1<N0<Nmax, T1<T0<T2, Pdiff>P1, it is determined that the loader is in the working state of ② bucket lifting and shoveling or ④ bucket lifting and unloading, and the fuel consumption FC2 is recorded by the ECU, where:

[0026] Nmax is the rated speed of the engine; T2 is the rated output torque of the engine;

[0027] Step 5: If engine idle<N0<N1, T1<T0<T2, Pdiff<P1, it is determined that the loader is in the working state of ③ fully loaded and moving to the logistics vehicle, and the boom cylinder pressure difference Pi and fuel consumption FC3 are recorded through the ECU;

[0028] Step 6: After the work is completed, find or calculate the required fuel consumption data based on the recorded FC1, FC2, FC3 and Pi.

[0029] In a further embodiment, the inlet and outlet pressure difference Pdiff of the boom cylinder in step 2 and the pressure difference error P1 caused by the slight swing of the bucket when the boom is lifted are calculated by subtracting the return oil pressure Pout from the boom inlet pressure Pin. When the boom is moving, Pdiff is much larger than P1. When the loader is lifted and moving forward, Pdiff is theoretically zero and smaller than P1.

[0030] In a further embodiment, in step 4, FC2 is the total fuel consumption of the working states of ② bucket lifting and shoveling or ④ bucket lifting and unloading, the actions of the two working states are opposite, and the fuel consumption of a single working state is FC2 / 2. In step 5, the number of recorded boom cylinder pressure differences Pi is the number of working cycles of the loader.

[0031] Example

[0032] This embodiment takes a six-cylinder engine as an example, and the calculation formulas for fuel consumption FC1, FC2 and FC3 are:

[0033] Hourly oil volume (kg / h) = cycle injection volume (mg / hub) * speed * 6 / 1000 / 60 / 2 * 3.6;

[0034] The number of working cycles of the loader is the number of recorded pressure differences Pi of the boom cylinder, from which it can be calculated:

[0035] Total fuel consumption A = ∑FC1 + ∑FC2 + ∑FC3;

[0036] Average fuel consumption per cycle B = total fuel consumption A / number of Pi;

[0037] ① The average fuel consumption from no-load to cargo working state C = ∑FC1 / Pi;

[0038] ② The average fuel consumption D = ∑FC2 / 2 / Pi of the bucket lifting and shoveling and ④ the bucket lifting and unloading working states;

[0039] ③ The number of vehicles fully loaded and moving back to the working state with average fuel consumption E = ∑FC3 / Pi;

[0040] Fuel consumption during load-bearing operation F = ∑FC2 + ∑FC3.

[0041] The present invention tracks and records the actual fuel consumption under load-bearing operation in real time, eliminates the influencing factors of non-working state, environment and action, supports the judgment of actual fuel consumption, and is conducive to finding the economical fuel consumption zone of the loader, so that the loader has better power and economy under various working conditions.

[0042] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A method for calculating fuel consumption during a loader load operation, characterized in that: The following steps are involved: Step 1: Install a speed sensor and a torque sensor on the engine flywheel, and install a pressure sensor on the boom cylinder; Step 2: After the loader is started, the working state is determined according to the engine speed N0, the engine running torque T1 and the inlet and outlet pressure difference Pdiff of the boom cylinder, and the corresponding data is recorded; Step 3: If engine idle≤N0<N1, 0<T0<T1, Pdiff<P1, it is determined that the loader is in the working state of ① moving forward without load to the cargo, and the fuel consumption FC1 is recorded by the ECU, where: engine idle is the engine idle speed; N1 is the engine speed corresponding to the maximum speed limit in the loader's working area; T1 is the minimum torque required for the loader to travel normally; P1 is the pressure difference error caused by the slight swing of the hopper when the boom is lifted; Step 4: If N1<N0<Nmax, T1<T0<T2, Pdiff>P1, it is determined that the loader is in the working state of ② bucket lifting and shoveling or ④ bucket lifting and unloading, and the fuel consumption FC2 is recorded by the ECU, where: Nmax is the rated speed of the engine; T2 is the rated output torque of the engine; Step 5: If engine idle<N0<N1, T1<T0<T2, Pdiff<P1, it is determined that the loader is in the working state of ③ fully loaded and moving to the logistics vehicle, and the boom cylinder pressure difference Pi and fuel consumption FC3 are recorded through the ECU; Step 6: After the work is completed, find or calculate the required fuel consumption data based on the recorded FC1, FC2, FC3 and Pi.

2. The method for calculating fuel consumption of a loader during load-bearing operation according to claim 1, characterized in that: The calculation method of the inlet and outlet pressure difference Pdiff of the boom cylinder in step 2 and the pressure difference error P1 caused by the slight swing of the bucket when the boom is lifted is the boom oil inlet pressure Pin minus the return oil pressure Pout.

3. The method for calculating fuel consumption of a loader during load-bearing operation according to claim 1, characterized in that: The calculation formula for fuel consumption FC1, FC2 and FC3 is: Hourly oil volume (kg / h) = cycle injection volume (mg / hub) * speed * number of cylinders / 1000 / 60 / 2 * 3.

6.

4. The method for calculating fuel consumption of a loader during load-bearing operation according to claim 3, characterized in that: In step 4, FC2 is the total fuel consumption of the working states of ② bucket lifting and shoveling or ④ bucket lifting and unloading. The actions of the two working states are opposite, and the fuel consumption of a single working state is FC2 / 2.

5. The method for calculating fuel consumption of a loader during load-bearing operation according to claim 1, characterized in that: In step 5, the number of recorded boom cylinder pressure differences Pi is the number of working cycles of the loader.