JPS6043136A - Apparatus for detecting accelerating operation of engine - Google Patents

Abstract

PURPOSE:To improve the vehicle driving feeling and to lower the specific fuel consumption, by providing a slice-level determining means and a comparing means for making comparison between the output of said slice-level determining means and the output of an engine-load detecting means and producing a comparison signal to an acceleration correcting means. CONSTITUTION:An apparatus of this invention comprises a load detecting means B for detecting the load of an engine A and a level determining means C for determining a slice level. Further, the apparatus comprises a comparing means E which makes comparison between the above two means B and C and produces a comparison signal to an acceleration correcting means F for effecting corrected control of the engine at the time of accelerating operation. Since, with such an arrangement, accelerating condition of the engine can be detected more exactly and sensitively, it is enabled to improve the vehicle driving feeling and to lower the specific fuel consumption of an engine.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an engine that detects when the engine is being accelerated and outputs a predetermined correction control signal to the engine's fuel system, etc. This invention relates to an accelerated driving detection device.

(Prior art) This type of conventional engine acceleration operation detection device calculates the deviation between the engine intake pipe pressure detected by a pressure sensor and the preset intake pipe pressure during normal constant speed operation. However, when this pressure deviation reaches a certain value or more, it is determined that the engine has shifted to acceleration operation, and based on this determination, a predetermined side signal is output to the engine's fuel system to control the fuel flow. However, in a system that detects acceleration operation based on the pressure deviation of the intake pipe pressure, it is difficult to detect high-load During operation, when the intake pipe pressure is close to atmospheric pressure, when accelerating in a high-load operation region, the pressure deviation is small in proportion to the increase in throttle valve opening, and there is a possibility that acceleration operation cannot be detected. Therefore, accelerated driving is detected by the accelerated driving detection device α,
In an engine system that performs sti and control based on this, the amount of fuel is not sufficiently increased during acceleration, and so-called hesitation phenomenon tends to occur.Especially in automatic grass engines, such hesitation phenomenon affects the driving feeling. This is undesirable because it leads to deterioration.

By the way, (in order to solve this problem, it may be possible to set the pressure variation that performs acceleration correction to a small value, but if this is done, the acceleration correction M degree will increase in the light load driving range, resulting in worsening fuel efficiency and driving performance. There is a drawback that it does.

(Object of the Invention) The present invention provides an engine acceleration operation detection device that can reliably and sensitively detect when an engine is accelerated, regardless of the operating load range of the engine. It was made for the purpose of providing.

(Bark of the Invention) The engine acceleration M change detection device plate of the present invention includes a square detection means B for detecting the load of the engine A, and a slice according to the load detected by the load detection means B, as shown in the figure. A level setting means C for setting a level compares the output signal of the level setting means C with a load signal outputted from the load detection means B via an appropriate acceleration detection means, and corrects the engine A during acceleration. The acceleration correction means F to be controlled is provided with a comparison means E for outputting the comparison signal, and the slice level is set so that a smaller load signal can be detected during crystal Q load operation than during A9 load operation. In the case of acceleration in the operating range, similarly to the case of acceleration in the low-load operating range, the acceleration operation is reliably and accurately detected, and the engine bullet suppressing means G, which is supposed to be the i-fuel supplying device of the engine, is activated at the predetermined acceleration time. The present invention is characterized in that it is capable of outputting a correction signal of.

(Example of Damage) FIG. 1 shows an example of an acceleration operation detection device attached to the fuel system X of an automobile fuel injection type engine, according to an actual example of the present invention. ! i'
A block diagram of the WLZ M control is shown.

The fuel system X corresponds to the engine opening means G shown in FIG. Basic injection pulse width based on 1il of intake air (output signal Sl)? The ILF calculation circuit 7 calculates the basic injection pulse width that determines the amount of fuel and the injection timing, and further calculates this basic injection pulse (output signal S7) as the fuel output from the acceleration operation detection bag opening 2, which will be described in detail later. Increase correction signal (
Based on the output signal S,), the injection pulse date setting circuit g corrects the final injection pulse Ω (output signal S1.), and also sets the final injection pulse width (output signal Sil+).
is input to the drive circuit wa to open and close the fuel injection valve t.

Acceleration operation detection equipment 2 consists of the throttle opening (output signal S1) output from the throttle opening sensor/l, the number of revolutions (output signal S), and the pressure sensor/3 (the load shown in the figure). The controller has a controller which uses the suction pressure (output signal S) outputted from the detection means B) as an input signal and performs a predetermined detection side action as described later. Below, the structure and control action of this controller will be explained with reference to FIG. 2 and FIG. It has a level setting circuit t and a level comparison circuit S,
The zone determination circuit 2 receives the throttle opening (output signal S1
) and engine speed (output signal S) are input. This zone determination circuit is composed of the acceleration correction means F shown in FIG.
It is equivalent to , and has a map in which the optimal fuel increase correction value for accelerating operation in each driving state is predetermined at the address corresponding to the throttle opening degree and engine speed. Therefore, a fuel increase correction signal (output signal Sg) is output to the reconnaissance pulse setting circuit of the front b2 fuel lip system It is supposed to be done.

The power and 11th speed characteristic calculation circuit 3 includes a bypass filter (n
, i'lp), and the engine speed (output signal S,) output from the rotation speed sensor 12 and the intake pipe pressure (output signal S,) output from the pressure sensor/3 are input. , as shown in Fig. 783 (g), the accelerator pedal is depressed and the intake pipe pressure (i.e. engine load) reaches the third level.
When there is a sudden change as shown in the figure, a triangular mountain-shaped load characteristic curve (
For example, a seventh load characteristic curve 4v-th load characteristic curve lU, etc.) is drawn, and this is outputted to the level comparison circuit S as a load i (output signal SA). This load characteristic curve is unique to each operating state of the engine, which changes from moment to moment.
The larger the deviation of the intake pipe pressure, in other words, the larger the amount of depression of the throttle valve during acceleration, the higher the level of the load signal, b (eh yu), becomes. Also shown in Figure (b), the 7th Q load characteristic curve fsI! is the load characteristic curve when accelerating in the low load operation region, and the second load characteristic curve 7! is the load characteristic curve when accelerating in the Kanpaku load operation region. ). This acceleration characteristic calculation circuit 3 corresponds to the acceleration detection means shown in FIG.
The purpose is to set a slice level that is the standard for determining whether the load signal level reaches the load signal level during acceleration in the current operating range.In this demonstration example, the intake air As the q pressure increases (the Q pressure decreases), the slice level decreases at an appropriate rate. A slice level curve KA corresponding to the intake pipe pressure is stored in advance in the map, and this slice level For example, from song 1+1KA, the intake pipe pressure is 1!
In the case of 00 mm 11 g, slice level I (A,
In addition, when the intake pipe pressure is -II0Ornml1g, the slice level [A, Output (output signal S,). This level setting circuit l has a first
This corresponds to the level setting means C shown in the figure.

In the level ratio circuit 3, the load signal level of the load characteristic curve inputted from the acceleration characteristic calculation circuit 3 and the slice level inputted from the level setting port IN5≠.

If it is (load (No. 3 level))> (slice level), it is detected that the engine is currently in acceleration operation, and a control signal indicating acceleration operation is sent to the zone determination circuit 2. Output.For example, if the intake pipe pressure is -p
ooll! In the case of acceleration in a low-load operation region such as Ing, from the level comparison time Ut, as shown in Fig. 3 (
When the control (No. 8 (pulse signal) shown in C) is output and the acceleration is performed in a surface load operation region where the intake pipe pressure is -110OHHg, the level comparison circuit as shown in Figure 3 A control signal (pulse rotor) as shown in (d) is output.On the other hand, if the load signal level is (slice level), the engine is not currently being accelerated. Therefore, no control signal is output to the lag zone determination circuit λ.This level comparison circuit j corresponds to the comparison means E shown in FIG.

From the level comparison circuit S to the zone judgment circuit λ, Liaoyuan'ii
When the control signal indicating E is input, in response to it, as described above, the zone determination circuit 2 outputs a fuel increase correction signal S-v corresponding to the current engine operating range. It is output to the value setting circuit, and the fuel ftR is appropriately increased.

This zone determination circuit 2 is an acceleration correction means F shown in FIG.
I'm aiming for 4.

In this way, the load signal level is compared to IJff? J low Q
Stock alignment: The slice level is set relatively high in the roll @ Then, when the engine is accelerated, the transition to accelerated operation can be reliably and sensitively detected from the load signal, regardless of the load range. That is, when accelerating in a high load operating region, the first load characteristic curve shown by curve E in FIG. 3(b) is obtained.
Male case 1, slice level is low load operation (as in the case of acceleration in the d region, I (A), (load signal/level)
'1 slice level), even though the engine is accelerating at the actual Hz<, no control signal i1g is output from the level comparator circuit j, but as mentioned above, the slice level is K A, Accelerated driving is detected by setting KA to a level lower than that of KA.

Therefore, when the engine is operated at an accelerated rate, the fuel is reliably and quickly refilled. It becomes possible to suppress as much as possible the hesitation phenomenon that tends to occur during acceleration in the load operation region.

In the above embodiment, the acceleration operation detection device 2 controls the mm system X of the engine, but the invention is not limited to this embodiment. Of course, it is also possible to control the flow of the exhaust silver gas 'Q'.

(Effects of the Invention) The engine acceleration operation detection device of the present invention includes: load detection means for detecting engine load; level setting means for setting a slice level according to the load detected by the load detection means; Comparing means is provided for comparing the output signal of the setting means with the load signal from the GI load detection means and outputting the comparison signal to the acceleration correction means for correcting and controlling the engine during acceleration. When accelerating in a high load operation region where the level of the load signal is relatively low, the slice level is set lower than when accelerating in a low load operation region where the level of the load signal is relatively high.

This has the effect that the accelerated driving state can be detected more reliably and sensitively than in the case where the slice level is set to a constant value regardless of the engine load state.

[Brief explanation of the drawing]

Fig. 1 is a fLJ control block diagram of the engine acceleration operating state unit U according to Example 1j of the present invention, Fig. 2 is a correlation diagram between the intake pipe pressure and the slice level, and the third factor (Φ) is the relationship between the intake pipe pressure and the slice level. The change state diagram, FIG. 3(b), shows the negative feedback output from the acceleration characteristic calculation circuit shown in FIG. 1, FIG. 3(c), and FIG.
Figure (d) is an output signal diagram of the level comparison circuit shown in Figure 1, and mttw is an explanatory diagram of the groove configuration of the engine acceleration detection device of the present invention. l ・ ・ ・ ・ U controller 2...Zone f4I constant circuit 3...Acceleration characteristic calculation circuit Hiroshi...Level setting circuit S...Level comparison circuit... ...Fuel 1 injection valve 7...Basic injection pulse 2 performance U @ road g...Injection pulse setting circuit...Pressure circuit A...Engine B: Load detection means C: Level setting means D: Load signal output means p: Ratio means F: Acceleration correction means output Toyo Kogyo Co., Ltd. intake cylinder pressure (11g)

Claims (1)

[Claims] 1. A load detection means for detecting the load of the engine, a level setting means for setting a slice level according to the load detected by the load detection means, and an output signal of the level setting means and a load from the load detection means. 1. A device for detecting accelerated operation of an engine, comprising a comparing means for outputting the comparison signal to an acceleration correcting means for correcting and controlling the engine during acceleration.