Honda Civic/Acura Integra

from 1994 launch

Repair and operation of the car

The systems VTEC – the general information and check of a condition of component ones

General information

Some models of the cars of Honda are equipped of the electronic system of the correction of phases of the distribution of gas (VTEC). In the Civic models the system VTEC of one of two several types (VTEC and VTEC-E) can be in use.

The distinction between the ordinary and driving motors equipped of the system VTEC is composed in a complete set and the beginning of the operation of the mechanism valvate. A drawing of the block of the motor and all the knots with hinges and unities, and also schemes of the organization of systems of lubrication and cooling in both unities it is identic. The motor that is equipped exgently of the system VTEC is differentiated in the existence from above in a covering of a head of cylinders of a convex inscription of the corresponding content (VTEC).

The processor of side of the equipped models of the system VTEC is able to correct phases of the operation and the size of the opening of valves of entry due to the use of several size of cames of the axle. The processor, depending on the data that arrive of the information sensor, includes or puts the system out.

Like initial parameters of the systems VTEC of both types the next thing is in use:

  a) Frequency of rotation of the motor (revolutions per minute);
   b) Speed of the movement of the car (thousands / h);
   c) Sign of production of the sensor of provision of a valve of butterfly (TPS);
   d) A current load of the motor is determined by indications of the sensor of the absolute pressure in the oil pipeline of entry (MARCH);
   e) Temperature of cooling the liquid.

The configuration and the beginning of the functioning of the systems VTEC-E are differentiated of that for the systems VTEC a little (see down).

VTEC-E (D16Y5)

The axle is equipped so much of cames primary, as of secondary ones of the walk of valves of entry. The cames are differentiated both in a form, and in the height of rises, this is parameters that determine duration and point of the opening of valves.

In small turns of the secondary work of valves of motor of cames themselves of the axle that has very small rise and a form reached the very point (this is valves they confide lightly only lightly and very much during some time), maintaining the sprinkled fuel of the consolidation in a head of cylinders. At the same time the good torque with the high speed of the answer to the gas is developed.

If a need for the increase will be in the return of the motor, the secondary yokes are blockaded with the prior election through the special hydraulic device with the electronic control.

The secondary yokes stop contacting to have cames up to that moment like the system not if desconectará. At the same time both valves open in the full height and with the very duration, supplying the increase in turns and return of the motor.

VTEC (D16Y8)

The cames of the walk of primary and secondary valves of entry of the axle in this system are identic in a form and the height of rises. Between them the third additional came called by also the intermediary is located. These intermediary cames are differentiated in the biggest height and the least sharpness of the rise that supplies the great size and the duration of the opening of the valve.

In small turns of the motor both the prior election and the secondary valves of entry work of cames themselves and opened in the identic height and with an identic duration (differently of the system VTEC-E). When there is a need for the increase in the return of the motor, the yokes of both valves of entry through the special hydraulic device with the electronic control are blockaded with an intermediary yoke. At the same time the duration and the height of the opening of both valves are defined by the form of the intermediary came that is differentiated in the biggest height and less sharpness of the rise.

The primary and secondary yokes stop contacting to have cames up to what the system not if desconecte.

The system allows to try to obtain the torque of favorable condition both in the boy, and in high turns of the motor, depending on the current load enclosed for him.

Check of a condition of component ones

Slits ticket inspectors valvate (alone VTEC)

Four slits ticket inspectors valvate place themselves in bearers, forming like empurradores hydraulic.

ORDER OF REALIZATION

1. Otboltite also withdraws the meeting of the bearer. 2. Take of the bearer of the meeting of individual ticket inspectors. 3. The fingers check the freedom of movement of each one of ticket inspectors. In case of the identification of points of a zakusyvaniye they substitute incorrect meetings.

Plate of distribution of phases, capture and repayable spring (alone VTEC-E)

Four plates of the distribution of phases with repayable springs (to see an illustration down) put themselves in bearers of the axle in an axle of yokes of entry.

A) Plate of distribution of phases C) Repayable spring C) Bearer of a came

Apparently of an illustration, the capture of the meeting is equipped of a hanger of coat of the deduction of one spring.

ORDER OF REALIZATION

1. Check the confidence of the fixation of one spring in the bearer of the axle and a plate of the distribution of phases. 2. Examine component in the existence of scratches, chips, aspects of overheating and other damages. 3. The incorrect parts are subject to the substitution. 4. The meeting order is an egg white of an illustration in top.

The meetings of sincronização

ORDER OF REALIZATION

1. After the removal and they are demolished of meetings of yokes (to see the Removal, the check of a state and the installation of the meeting of yokes), also takes component of the knots of sincronização (companions see illustrations). Alone VTEC-E D16Y5: A) Yoke of primary valve C) Yoke of the secondary valve C) Lock piston D) Spring of lock E) The piston of sincronização Alone VTEC D16Y8: A) Yoke of primary valve C) Yoke of the secondary valve C) Intermediary yoke D) The pistons of sincronização 2. Check a spring condition of blockade (alone VTEC-E). 3. Examine component others of the meeting (a yoke with the pistons of sincronização). In case of the identification of signs of use, atritos, deeply scratches, zadir or of overheating, aspects substitute component incorrect. 4. The meeting is done as it must be, the return to an order to be demolished. Join component of meetings of each one of cylinders, fix them with a rubber bandage, only after him they establish in an axle (to see the Removal, the check of a state and the installation of the meeting of yokes).

Valve eletromagnética of blockade of VTEC

The bad functioning in an outline of the valve eletromagnética of the blockade of VTEC leads to the operation of a lamp of control "Checks motor" panels of the cars. At the same time in unities of control of memory the code of the bad functioning (DTC) P1259 is brought. In a drawing the valve of the blockade of VTEC with the switch of built sensor of the pressure is similar used in the system VTEC of the models of Full text. The description of the proceeding of the check of the usefulness of the functioning of the meeting supplies with itself in the Repair of Part of the motor without extraction of the car - the model of Full text of the present Chapter.

Masloraspylitel

To see the Removal, the check of a state and the installation of the meeting of yokes.

Yoke of primary valve

To see the Removal, the check of a state and the installation of the meeting of yokes.

Yoke of the secondary valve

To see the Removal, the check of a state and the installation of the meeting of yokes.

Intermediary yoke (alone VTEC)

To see the Removal, the check of a state and the installation of the meeting of yokes.

Intermediary Came of the axle (alone VTEC)

To see the Removal, the check of a state and the installation of the meeting of yokes.