JPH01215631A - Start controller of automatic gear vehicle - Google Patents

Abstract

PURPOSE:To enable a vehicle of being started immediately after the start of an engine by releasing the inhibition of the start control for the engine when the operation of the engine is interrupted during the drive of the vehicle or immediately after the drive thereof. CONSTITUTION:An automatic gear vehicle has both a shift position detection means A which detects an automatic transmission gear for the shift position thereof and a drive range starting control inhibition means B which inhibits the start control of the engine when the shift position is in the drive range. In such case the halt of operation of the engine is detected. There is provided an engine halt detection means C which detects whether the engine is during the operation or in the state right after the drive. There is provided a vehicle drive determining means D which determines whether the vehicle is during the drive or in the state right after the drive. There is further provided a start control inhibition releasing means E which releases the inhibition of the start control for the engine executed by the drive range start control inhibition means B when the engine is stalled during the drive of the vehicle or in the state right after the drive.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a start control device for an automatic transmission, and more specifically, to a device that prohibits starting the engine when the shift position is in the travel range. Regarding.

(Conventional technology) In case of automatic transmission, it runs out of control when starting.

To prevent flying out of the first floor, the engine can be started on the condition that the shift position is in the parking range (P range) or neutral range (N range). That is, when the shift position is in forward (D range) or reverse (1 lunge), the engine start control is performed in 14. It is supposed to be f.

However, there is a problem in that if the engine stalls while driving, it is necessary to start it after operating the shift lever each time.

For this reason, Japanese Patent Application Laid-Open No. 57-23299 discloses that if the engine stops while driving, the shift position is automatically switched to the P range or N range to enable the engine to start. A technique for doing so has been disclosed. According to the technology disclosed in the publication, the engine can be started without having to operate the shift lever each time the driver is driving.

(Problems to be Solved by the Invention) However, it requires an actuator to automatically change the range, and even if the engine can be started immediately after the engine is stopped, the shift position 1 is in the P range or Because it is in the N range,
It is impossible to start the vehicle immediately after starting the engine, and this cannot necessarily be said to be a one-minute countermeasure.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide an automatic start control device that allows a heavy vehicle to run immediately after the engine is started.

(Means and operations for solving the problem) In order to achieve the above technical advantages, in the present invention, as shown in FIG. Assuming that the automatic +lj is equipped with a drive range start control inhibiting means that disables the engine start control.

Engine stoppage [1-
and detection means.

a vehicle running determination means for determining whether the heavy vehicle is in the middle of running or just after running; and when the engine stops operating while the heavy vehicle is running and the driver has just started running, the engine is stopped by the drive range start inhibiting means. Starting control prohibition 1 to cancel starting control prohibition +1
] Two release means.

With the above two configurations, when the engine stops during or immediately after driving on a small mountain, can the shift position be set to 1? The engine can be started for 11 seconds with the i range set. Therefore, simply by stepping on the accelerator pedal following the engine starting operation, both vehicles enter the running state.

(Example) Hereinafter, embodiments of the present invention will be described based on the drawings.

In FIG. 2, reference numeral 1 denotes an engine body, and air taken into the engine body L is supplied to an air cleaner 2. air flow chamber 3, throttle valve body 4, surge tank 15,
It is supplied to the combustion chamber P through the intake manifold 6 and the intake boat 8 which is opened and closed by the intake valve 7, and is then supplied to the air cleaner 2.
The path from the intake boat 8 to the intake boat 8 constitutes an intake passage IO. The amount of intake air flowing through this intake passage IO is controlled by a throttle valve 11, while being measured by an air flow meter 12.
The fuel injected from the tank is mixed. The intake passage 10 is also provided with a bypass passage 154 that bypasses the throttle valve 11. That is, the flow end of the bypass passage 4 communicates with the intake passage IO on the upstream side of the throttle valve 11, and the upstream end of the bypass passage 4 communicates with the intake passage 10 on the downstream side of the throttle valve 11.
This bypass passage 4 is connected to a solenoid valve 15 made of a proportional solenoid valve.

A spark plug (not shown) is disposed in the combustion chamber 9, and after the combustion gas in the combustion chamber 9 expands to push down the piston 16, an exhaust boat valve 8 is opened and closed by an exhaust valve 17. ．． It is exhausted through an exhaust passage made up of 19 exhaust manifolds.

The output shaft of the engine body l is connected to the driving wheels via an automatic transmission (not shown), and a torque converter is interposed between the automatic transmission and the engine body. is equipped with lock-up clutch X. The automatic transmission described in I- is of the known planetary gear type, and gears are changed by appropriately operating friction elements attached thereto, such as a brake or brake.

In FIG. 2, reference numeral 20 denotes a control unit configured using a microcomputer, and the control unit 20 includes inputs (I'i) from sensors or switches 21 to 23, and inputs from the air flow meter 12. The signals are human-powered.

The sensor 21 detects the throttle opening.

, sensor 22 detects the engine rotation speed.

The sensor 23 detects the currently selected range position of the shift position. In other words, the shift lever 30 is manually moved backwards to shift to "P".

It is possible to select each range position of rllJ, rNJ, rDJ, and the above ")", r RJ, rNJ,
rDJ is known as "park", "reverse"
, "Neutral" and "Drive". The range position sensor (lN11 switch) 23 outputs the rONJ signal when the shift lever 30 is in the "I" and rNJ ranges, and outputs the rONJ signal when the shift lever 30 is in the "I" and rNJ ranges. rRJ
, it outputs the roFFJ signal when it is in the rDJ range. Further, the switch 24 is a starter key switch that turns on and off the power supplied from the battery 31 to the starter dryer 32 by manual operation by the driver.

From this control unit 20, the fuel injection valve 13. In addition to the electromagnetic valve 15 and the automatic transmission transmission mechanism (solenoid provided in the hydraulic circuit), a control signal is output to a starting control switch 25 connected in series to the starter key switch 23.

The control contents of the control unit 20 are as follows: First, the shift characteristics and lock-up control shown in FIG. 3 are performed. In FIG. 3, region I2 is a lock-up ON region where the lock-up clutch is completely engaged, and region III is a lock-up OFF region where the lock-up clutch is completely disengaged. Region 1, which is set at a lower vehicle speed than region II, is the region in which the lock-up clutch 7 is the primary clutch. In the figure, 1.2.3.4 indicates each gear stage.

In addition, the starting control switch 24 is, in principle,
oNJ, ror;'[' When the range position sensor 22 is outputting the "ON" signal in response to the l signal -, that is, when the rPJ and rNJ ranges are selected,
When the start control switch 24 is turned "ON" and a state in which the engine can be started is generated, and on the other hand, the range position sensor 22 is outputting the "rOFF" signal, that is, "1)", the r RJ range is When selected,
The start control switch 24 is set to OF1'' to prohibit starting of the engine.

Based on the above, in this embodiment, even if the range position sensor 22 outputs the r OFF J signal, that is, even if the r DJ or r RJ range is selected, the following conditions are met. At the bottom, the start control switch 24 is switched to "ON", and the above-mentioned prohibition of starting the engine [-] is released.

Engine IJI-I Sanskrit IL7, ^ (1) Stopping the engine while the heavy vehicle is running (2) Stopping the engine immediately after driving (Cancelling engine start 21 for a certain period of time) And when canceling this engine start ticket 1,
The fuel tt and intake air flow at the time of starting are adjusted to increase or decrease as appropriate depending on the state when the starter key switch "ON" is operated (FIG. 5).

Below, a concrete example of the control is shown in FIG.

This will be explained in more detail based on the flowchart shown in FIG. .

In FIG. 4, first, in step s1, rONJ of the starter key switch 23 is turned on.

After reading the "T°" signal etc., in step s2,
It is determined whether the rPJ or rNJ range is currently selected, and the shift lever 3o is set to "1)" or r
When it is determined that it is in the NJ range, step s3
It is determined whether the starter key switch 23 has been turned "ON" or not. Here, since the starting control switch 24 is in the "ON" state as described above, when the starter key switch 23 is turned "ON", the starter motor 32 is started accordingly. Then, in step S3, when the determination result is y E S, the process proceeds to step S4, where starting control is performed. Specifically, as is known, the starting control includes correction at the time of starting (increasing the opening degree of the ISC valve 15 with respect to the basic opening degree of the ISC valve 15 corresponding to the current cooling water temperature). By adding the correction), the amount of bypass air at startup is set, and in the same way, the fuel injection is set. Based on this, fuel injection (step S5) or ISO valve 15 is driven (step S6). In the next step S7, an engine stop L flag (hereinafter referred to as an engine stall flag) is
After resetting, the presence or absence of the vehicle speed, that is, whether one vehicle is in a stopped state or in a running state is determined (step S8). Immediately after the engine starts, the shift lever 30 shifts from rPJ and rNJ ranges to "[)" and r R.
Unless the vehicle is operated to the J range, the vehicle is in a stopped state, so the vehicle speed is zero, and the process proceeds to step S9.
It is determined whether the engine is started or stopped (stalled). When the engine continues to operate, return to step S1, go through steps S2 and S3,
In step SI O, a range determination is made based on the engine speed and load. If the engine is in the idle operating range, the process advances to step Sll and idle control is performed. If it is outside the idle operating range, the process advances to step SI2 and normal control is performed. will be done. That is, in idle control, the opening degree of the ISC valve 15 is adjusted so that the engine speed is constant. On the other hand, in normal operation control, the opening degree of the ISC valve 15 is fixed,
The intake air aeration is adjusted by a throttle valve 11.

On the other hand, in step S2, "")" or "1(
” When it is determined that the engine is in the range, as long as the engine continues to operate, steps S1; 3 to S
Proceeding to IO, the aforementioned operating range is determined and control is performed accordingly (step Sll, 12). Then, when the vehicle actually starts running, step S14
At this point, the running flag is set. Here, when the running flag is at "1", it means that the vehicle is in a running state or has just started running as will be described later.

When it is determined in step S9 that the engine operation has stopped, the process proceeds to step SI5 where the engine stall flag is set, and then it is determined whether or not the running flag is set (step 5I).
6).

When the answer is YES in step 316, it is determined whether there is a vehicle speed, that is, whether the RLI vehicle is running or stopped, and when it is determined that the RLI vehicle is running (Yt:S), step S! 8, after turning on the start control switch 24, the running flag is reset (step 519). Therefore, in a state where the "l)" or rRJ range is selected, when the engine operation stops +t while driving, the process proceeds from step S2 to step SI3 to step S20, and then the start control switch 24 Since it is in the "ON" state, the process advances to step S2+, where engine starting control is performed in response to the rONJ operation of the starter key switch 2:3. (Step 522). This engine starting control will be explained in detail later.

On the other hand, when it is controlled that the engine operation is stopped when the vehicle stops after driving in step S17 of 11; It is set to “ON”. That is, for example, when the engine stops operating during a temporary stop in the rDJ range, the start control switch 24 is turned off for a certain period of time.
It was set to NJ, and Niresin starting became possible. On the other hand, ""
)" or rNJ range, when the engine stops operating, or when the engine is shifted to the rDJ or "R" range but the engine stops without even starting to run, the running flag is set in step SI6. Since it is "0", the process directly returns to step St. That is, in such a case, unless the "P" or rNJ range is selected, the engine will be started.

Figure 5 shows the details of the engine stall start control.
This corresponds to step S22 in step 1.

In engine stall starting control, when starting while the engine is stopped, in steps S30 to S31 and 32, the fuel injection is increased and the amount of bypass air is increased Fn hn iI- more than in normal starting control (step S4). The dashed line ([)) in FIGS. 6 and 7 ensures reliable engine starting. On the other hand, if the engine is stopped during running 1], steps S33 to 3
As shown in Fig. 36, supplementary IE is performed to reduce the amount of fuel injection M and bypass air compared to normal starting control (solid line (11) in Figs. 6 and 7). M
T? The correction is based on the ONJ or roFFJ of the lock-up clutch.
When NJ is applied (in Figures 6 and 7 - dotted line (
■)), greatly reduced by 1 compared to when rOFFJ is applied.
11. That is, when the lock-up clutch is "ON", the driving wheels and the engine are directly connected, so that the engine can be started easily.

Due to the above configuration, the start control switch 24 is in the rONJ state while driving or immediately after driving, so by turning the starter key switch 21 ON, it will turn on, for example in the ``■'' or rRJ range. Even if there is, engine starting will be improved by +1. After starting the engine, the vehicle can start running immediately by simply depressing the accelerator pedal.

(Effects of the Invention) As is clear from the above description, according to the present invention, when the vehicle is in the middle of driving or just after driving, the shift position can be left in the driving range and the engine cannot be started immediately after the engine is stopped. It is possible to start driving the vehicle immediately after starting the engine. Furthermore, there is no need for an actuator or the like to automatically switch the range, and the structure is simple.

[Brief explanation of the drawing]

FIG. 1 is an overall configuration diagram of the present invention. Fig. 2 is an overall system diagram of the embodiment, Fig. 3 is a diagram showing the shift pattern of the automatic transmission, Figs. 4 and 5 are flowcharts for erasing an example of control, and Figs. 6 and 7 are diagrams showing the start of engine stall. FIG. 3 is a diagram illustrating a supplementary mode of bypass air clearing around fuel injection in dynamic control. 1: Engine body 10: Intake passage 1: Throat/Sotol valve 14: Bypass passage 15: Solenoid valve (ISO valve) 20: Control unit 22: Engine speed sensor 23: Shift position sensor (I N II switch, switch) 2
4: Starter key switch 25: Start control switch 30: Shift lever: 32 Starter key switch

Claims (1)

[Claims] (1) In an automatic vehicle equipped with a travel range start control prohibition means for prohibiting engine start control when the shift position of the automatic transmission is in the travel range, an engine stop detection means for detecting engine stoppage; Vehicle running determination means for determining whether the vehicle is in the middle of running or just after running, and when the engine stops operating while the vehicle is running or just after running, prohibits engine start control by the drive range start prohibition means. A starting control device for an automatic vehicle, comprising: starting control prohibition canceling means for canceling the prohibition of starting control;