JPH0569350U - Electronic fuel injection device - Google Patents

Abstract

(57) [Abstract] [Purpose] Over-steering may occur when turning at a corner with a small radius at high speed, and if the steering is turned back straight or in the opposite direction, it will end cornering and go straight. The control device determines that the steering wheel has been returned, and the same torque as in the case of normal straight traveling is generated in the engine to suppress unstable traveling. [Configuration] A wheel speed sensor for detecting a wheel speed, a steering angle sensor for detecting a steering angle, and a TDC for detecting an engine speed
In an electronic fuel injection device including a sensor and a control device that controls an injection amount of fuel according to a detection result of each of the sensors, fuel injection is suppressed for a predetermined period during straight traveling immediately after oversteering correction.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an electronic fuel injection device for a vehicle using a steering angle sensor.

[0002]

[Prior Art]

 Conventionally, in this type of electronic fuel injection device, maximum acceleration is performed when going straight, and torque is reduced as much as possible during cornering in order to drive safely, so it is detected by the wheel speed sensor of each left and right driven wheel. The yaw angle of the vehicle body is detected from the wheel speed difference, and the driver's intention is estimated from the steering angle detected by the steering angle sensor. If the steering angle is larger than the yaw angle, understeer and steering angle are detected. When the steering angle is small and the steering angle is in the straight direction, it is determined to be straight, and when it is determined to be straight, the torque is increased to the extent that the drive wheels slip slightly, but during cornering. Also, the torque is controlled to be sufficiently reduced during understeering.

[0003]

[Problems to be solved by the device]

 In general, the driver is unlikely to return the steering to the straight direction or more during cornering, but over-steering may occur during high-speed turning in a corner with a small radius. In that case, the driver must turn the steering wheel back straight or in the opposite direction to correct the situation.

At that time, in the conventional control method, the control device determines that the driver has returned the steering wheel in order to go straight ahead after finishing cornering, and causes the engine to generate the same torque as in the case of normal straight ahead. As a result, the vehicle body becomes unstable and there is a problem that the vehicle runs bulging outward.

[0005]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, the present invention provides steering after the oversteering amount calculated from the wheel speed and the steering angle detected by the wheel speed sensor and the steering angle sensor on the left and right driven wheels exceeds a certain value. The engine torque is delayed for a while immediately after the vehicle returns to a straight line.

[0006]

【Example】

 Next, an embodiment of the present invention will be described with reference to the flowchart of FIG.

In step 1, it is determined whether the steering angle is near the straight traveling direction.

If it is determined that the value of the steering angle is large and the vehicle is not in a straight traveling state, it is determined in step 2 whether oversteering is performed. If oversteering is greater than a predetermined value, FLAG is stored as 1. I'll do it.

When it is determined that the steering is in the straight traveling state in step 1, normal straight traveling control is performed if FLAG = 0 in step 3, and the timer is counted if FLAG = 1. During that time, straight ahead control is not performed and the torque is sufficiently reduced so that stability is not lost.

[0010]

[Effect of the device]

 As described above, the present invention allows the driver to operate the steering wheel at a steep angle, or when the steering wheel is cut too much on the slippery road to cause over-steering, the driver needs a moment to correct the over-steering. Even if the steering wheel is returned, the engine torque does not rise immediately, and cornering can be done exactly as the driver desires, and safety can be ensured.

[Brief description of drawings]

[Figure 1] Control flow

Claims (1)

[Scope of utility model registration request] 1. A wheel speed sensor for detecting a wheel speed, a steering angle sensor for detecting a steering angle, and a T for detecting an engine speed.
An electronic fuel, comprising: a DC sensor; and a control device for controlling the fuel injection amount according to the detection result of each sensor, wherein the fuel injection is suppressed and controlled for a predetermined period at the time of straight travel immediately after oversteering correction. Injection device.