SU688910A1 - Device for registering life-time of vehicle - Google Patents

Description

one

The invention relates to instrumentation, namely, devices for determining the technical resource of transport vehicles, such as an automobile during operation, and can be used as an autonomous device embedded in a diagnostic system in determining the technical condition of an engine.

A device is known for determining the technical resource of a vehicle that measures mileage or hours, which contains sensors according to the number of parameters taken into account and counters 1.

The drawback of the device lies in its low accuracy.

The closest technical essence to the invention is a device for metering machines, containing wheel and shaft rotation sensors, a constant frequency pulse generator, a comparator, a frequency divider, a multiplication unit and an amplifier connected in series, a stepper motor and a mechanical counter 2.

The disadvantage of this device is its low accuracy.

The purpose of the invention is to improve the accuracy of the device.

This is accomplished in that the ycTpoiicTBO, which contains wheel and shaft speed sensors, a frequency divider, a constant frequency geerator and a series-connected amplifier, stepper motor and counter, includes an engine load sensor, a frequency generator, a multiplication unit and a reversible counter. The engine load sensor is connected to the first input of the generator of a non-temporary frequency, whose input is connected to the first input of the frequency divider, the second input of the frequency divider to the wheel speed sensor, and the output to the first input of the unit, the second input of which is connected to the engine shaft rotation sensor and the third input is connected to one of the outputs of the control unit. Other outputs of the control unit are connected to the second input of the variable frequency generator, to the third input of the frequency divider and to the first input of the reversible counter, the second input of which is connected to the output of the multiplication unit. The third input of the reversible counter is connected to a constant frequency generator, and the output is connected to the input of the rammer.

Due to this device, the technical resource of the automobile is more accurately indicated under various loading conditions.

The value of the resource details is determined by the formula

L (A) 2 "y

t Q "count

where k - coefficient of proportionality; p - engine load indicator;

Ldv - the number of engine bores;

"Count - the number of revolutions of the output shaft

gear boxes.

The drawing is a block diagram of the device.

It contains the sensor 1 engine load, sensors 2 and 3 revolutions of the wheel and the shaft of the engine, respectively. The synchronization of the sensors is carried out by the control unit 4. A variable frequency generator 5 is connected to convert the output output from the engine load sensor. The number of pulses from the off-frequency generator is divided by the number of wheel revolutions using a frequency divider 6, the output of which is multiplied in block 7 multiplied by the number of engine revolutions. The variable mode of operation of the vehicle is functionally associated with a reversible counter 8. The constant proportionality factor of the instrument is determined by the constant frequency generator 9. For registering a number, a counter 10 is provided with a drive from a stepper motor 11 through an amplifier 12 of a signal.

The device works as follows.

When the car is moving, the engine load sensor 1 generates an electrical signal that is converted to a frequency using the variable frequency generator 5, and the engine load is applied to the variable frequency divider 6. The division is made by the number of revolutions of the wheel connected through the cable of the speedometer with the sensor 2. The output signal of the divider 6 is multiplied in block 7 by the frequency of rotation of the engine shaft connected through the shaft of the distributor distributor with sensor 3. The output signal from the multiplication unit is proportional to P , enters the reversible, the account "count

Tick 8, which fixes the variable rate of signal arrival in proportion to the external load of the vehicle.

When the car is rolling, the signal comes from the wheel speed sensor 2 through the variable frequency divider 6, the control unit 4 to the reversible counter 8, the input of which is connected to the generator 9 of a constant frequency, expressing the proportionality coefficient K.

reversible counter 8, regardless of the type of vehicle movement, is amplified in amplifier 12. From each incoming signal, the measles of the stepper motor rotate at a certain angle, driven by the counter 10. Synchronism of the frequency divider 6 and sensors 2 and 3 is performed by the control unit 4, which gives a signal the launch of operation of blocks 6 and 7. The use of the invention will make it possible to take into account the vehicle's mileage under various load conditions that affect the technical resource of the aggregates. Based on the meter readings, it is possible to carry out timely maintenance regardless of the category of roads, since the rotational speed of a stepper motor depends on the degree of loading of the car, with which the frequency of impulses from sensors 1, 2 and 3 changes. provides increased vehicle reliability by 80%.

Claims (2)

1. USSR author's certificate number 114811, cl. G 07С 3/10, 07.24.57. 2. The patent of France No. 2230023, cl. G 07С 3/10, 1975 (prototype).