阅读说明：本技术 一种dpf上游温度的控制方法、装置及车辆 (DPF upstream temperature control method and device and vehicle ) 是由 解同鹏 杨新达 褚国良 闫立冰 仝玉华 于 2018-12-11 设计创作，主要内容包括：一种DPF(105)上游温度的控制方法、装置及车辆,通过将再生温度预设值、当前DPF(105)上游温度值和当前DOC(103)上游温度值输入物理模型,以便获得前馈油量值。物理模型能够模拟在DOC(103)中将DPF(105)上游温度值加热至再生温度预设值的燃烧过程,以便根据该燃烧过程所需的燃油量获得前馈油量值。(A control method, a control device and a control vehicle for DPF (105) upstream temperature are characterized in that a regeneration temperature preset value, a current DPF (105) upstream temperature value and a current DOC (103) upstream temperature value are input into a physical model so as to obtain a feed-forward oil quantity value. The physical model is able to simulate a combustion process in the DOC (103) heating temperature values upstream of the DPF (105) to regeneration temperature preset values in order to obtain feed forward oil quantity values depending on the amount of fuel required for the combustion process.)

A method of controlling temperature upstream of a DPF, comprising:

acquiring a feed-forward oil quantity value by using a physical model according to a regeneration temperature preset value, a current Diesel Particulate Filter (DPF) upstream temperature value and a current Diesel Oxidation Catalyst (DOC) upstream temperature value; the physical model is constructed by simulating a combustion process of heating the temperature value at the upstream of the DPF to the preset regeneration temperature value by the DOC;

obtaining a total oil quantity value according to the feedforward oil quantity value and the feedback oil quantity value;

and sending the total oil quantity value to a hydrocarbon injection device, so that the hydrocarbon injection device injects fuel according to the total oil quantity value, and the temperature value of the DPF upstream reaches the preset regeneration temperature value.

The control method according to claim 1, wherein the physical model for simulating the combustion process when the DOC heats the DPF upstream temperature value to the regeneration temperature preset value comprises:

dividing the DOC into at least two DOC sub-blocks: a first DOC sub-block and a second DOC sub-block;

setting the current DPF upstream temperature value as an initial downstream temperature value of a second DOC sub-block;

obtaining an initial downstream temperature value of the first DOC sub-block according to the initial downstream temperature value of the second DOC sub-block;

setting the current DOC upstream temperature value as an upstream temperature value of a first DOC sub-block;

obtaining the fuel demand of the first DOC sub-block according to the upstream temperature value of the first DOC sub-block and the initial downstream temperature value of the first DOC sub-block;

obtaining an actual downstream temperature value of the first DOC sub-block according to the upstream temperature value of the first DOC sub-block and the fuel demand of the first DOC sub-block;

setting an actual downstream temperature value of the first DOC sub-block to an upstream temperature value of a second DOC sub-block;

obtaining the fuel demand of the second DOC sub-block according to the upstream temperature value of the second DOC sub-block and the initial downstream temperature value of the second DOC sub-block;

obtaining an actual downstream temperature value of the second DOC sub-block according to the upstream temperature value of the second DOC sub-block and the fuel demand of the second DOC sub-block;

and obtaining the feed-forward oil quantity value according to the fuel oil demand of the first DOC sub-block and the fuel oil demand of the second DOC sub-block.

The control method of claim 2, wherein before deriving a total oil amount value based on the feed-forward oil amount value and the feedback oil amount value, further comprising:

and obtaining a feedback oil quantity value by utilizing a Proportional Integral Derivative (PID) algorithm according to the difference value of the actual downstream temperature value of the second DOC sub-block and the current DPF upstream temperature value.

The control method according to claim 2, wherein the obtaining the feed-forward fuel amount value according to the fuel demand of the first DOC sub-block and the fuel demand of the second DOC sub-block specifically comprises:

and obtaining the feed-forward oil quantity value according to the fuel oil demand of the first DOC sub-block and the corresponding first fuel oil conversion rate, and the fuel oil demand of the second DOC sub-block and the corresponding second fuel oil conversion rate.

The control method of claim 1, wherein the obtaining of the feed forward oil amount value using the physical model is:

and acquiring a feed-forward oil quantity value by using a physical model according to preset periods, wherein the regeneration temperature preset value corresponding to each period is increased by a fixed temperature step length or a non-fixed temperature step length, and the value range of the regeneration temperature preset value is from the current DPF upstream temperature value to a regeneration temperature target value.

A control device for temperature upstream of a DPF, comprising:

the first obtaining unit is used for obtaining a feedforward oil quantity value by using a physical model according to a regeneration temperature preset value, a current Diesel Particulate Filter (DPF) upstream temperature value and a current Diesel Oxidation Catalyst (DOC) upstream temperature value; the physical model is constructed by simulating a combustion process of heating the temperature value at the upstream of the DPF to the preset regeneration temperature value by the DOC;

the second acquisition unit is used for acquiring a total oil quantity value according to the feedforward oil quantity value and the feedback oil quantity value;

and the sending unit is used for sending the total fuel quantity value to a hydrocarbon injection device, so that the hydrocarbon injection device injects fuel according to the total fuel quantity value, and the upstream temperature value of the DPF reaches the preset regeneration temperature value.

The control device according to claim 6, wherein the first acquisition unit includes:

a dividing subunit for dividing the DOC into at least two DOC sub-blocks: a first DOC sub-block and a second DOC sub-block;

the first setting subunit is used for setting the current DPF upstream temperature value as an initial downstream temperature value of the second DOC sub-block;

the first obtaining subunit is used for obtaining an initial downstream temperature value of the first DOC sub-block according to the initial downstream temperature value of the second DOC sub-block;

the second setting subunit is used for setting the current DOC upstream temperature value as the upstream temperature value of the first DOC sub-block;

the second obtaining subunit is used for obtaining the fuel demand of the first DOC sub-block according to the upstream temperature value of the first DOC sub-block and the initial downstream temperature value of the first DOC sub-block;

the third obtaining subunit is configured to obtain an actual downstream temperature value of the first DOC sub-block according to the upstream temperature value of the first DOC sub-block and the fuel demand of the first DOC sub-block;

the third setting subunit is used for setting the actual downstream temperature value of the first DOC sub-block as the upstream temperature value of the second DOC sub-block;

the fourth acquiring subunit is used for acquiring the fuel demand of the second DOC sub-block according to the upstream temperature value of the second DOC sub-block and the initial downstream temperature value of the second DOC sub-block;

the fifth obtaining subunit is configured to obtain an actual downstream temperature value of the second DOC sub-block according to the upstream temperature value of the second DOC sub-block and the fuel demand of the second DOC sub-block;

and the sixth obtaining subunit is used for obtaining the feedforward oil quantity value according to the fuel demand of the first DOC sub-block and the fuel demand of the second DOC sub-block.

The control device according to claim 7, characterized by further comprising:

and the third acquisition unit is used for acquiring a feedback oil quantity value by utilizing a Proportional Integral Derivative (PID) algorithm according to the difference value between the actual downstream temperature value of the second DOC sub-block and the current DPF upstream temperature value.

The control device according to claim 7, wherein the sixth obtaining subunit specifically includes:

and obtaining the feed-forward oil quantity value according to the fuel oil demand of the first DOC sub-block and the corresponding first fuel oil conversion rate, and the fuel oil demand of the second DOC sub-block and the corresponding second fuel oil conversion rate.

The control device according to claim 6, wherein the first acquisition unit includes:

and acquiring a feed-forward oil quantity value by using a physical model according to preset periods, wherein the regeneration temperature preset value corresponding to each period is increased by a fixed temperature step length or a non-fixed temperature step length, and the value range of the regeneration temperature preset value is from the current DPF upstream temperature value to a regeneration temperature target value.

A vehicle, characterized by comprising: a control device for the temperature upstream of the DPF as set forth in any one of claims 6 to 10.