1998-1999 of release
Repair and car operation
+ Honda Accord brand Cars
+ Settings and routine maintenance
+ Four-cylinder engines
- V6 engines
Preparatory actions and the list of repair procedures which can be executed without engine extraction from the car
Reduction of the piston of the first cylinder in the provision of the top dead point (VMT)
Removal and installation of covers of heads of cylinders
Removal and installation of the inlet pipeline
Removal and installation of final collectors
Removal, check of a condition and installation of a gas-distributing belt and cogwheels of a drive of GRM
Replacement of a forward epiploon of a cranked shaft
VTEC system - the general information
Removal, check of a condition and installation of assembly of yokes
Removal, check of a condition and installation of camshafts
Replacement of maslootrazhatelny caps and klapanny springs with plates
Removal and installation of heads of cylinders
Removal and installation of the pallet of a case of the engine
Removal, check of a condition and installation of the oil pump
Removal and installation of a driving disk
Replacement of a back epiploon of a cranked shaft
Check of a condition and replacement of support of a suspension bracket of the power unit (V6 Engines)
System of correction of a suspension bracket of the power unit - the general information and check of serviceability of functioning
+ General and major maintenance of the engine
+ Systems of cooling, heating
+ Power supply system and release
+ engine Electric equipment
+ Engine management
+ gear shifting Box
+ Coupling and power shafts
+ Brake system
+ Suspension bracket and steering
+ Onboard electric equipment
+ electric equipment Schemes
VTEC system - the general information
General informationThe VTEC system is developed by specialists of the Honda company for the purpose of a possibility of dynamic management of installation of phases of a gazoraspredeleniye and extent of opening of valves. The engines equipped with these system are marked by an inscription of VTEC formed on a cover of a head of cylinders. All V6 engines applied to a complete set of considered models of cars are equipped with VTEC system.
Difference of the engines equipped with VTEC system from the base version consists only in principle managements of phases of a gazoraspredeleniye and features of the device of the klapanny mechanism.
The onboard processor of a control system of the engine of the equipped VTEC models is capable to correct the moments of operation and extent of opening of inlet valves at the expense of use of cams of a camshaft of various size and a form. Depending on data arriving from the information sensor, the processor, either includes, or disconnects system.
The order of functioning of VTEC system is defined by the following initial parameters:
a) Frequency of rotation of the engine (rpm);
b) Speed of movement of the car (mile/h);
c) Target signal of the sensor of provision of a butterfly valve (TPS);
d) The current load of the engine, determined by indications of the sensor of absolute pressure in the inlet pipeline (MAR);
e) Temperature of cooling liquid.
The camshaft is equipped with three cams of a drive of each of the inlet valves of the engine differing from each other by a form of a profile and height of lifting by which duration and size of opening of the corresponding valves are defined.
At small turns of the engine secondary inlet valves work from own cams of a camshaft having very small lifting and a peaked form (i.e. valves, in comparison with primary, are slightly opened only slightly and very much for a while), holding the sprayed fuel from consolidation in a head of cylinders. The good bottom torque with high speed of reaction that defines excellent traction characteristics and high acceleration performance of the car thus develops. Primary cams thus function in a normal mode, creating turbulences of gas mixture in combustion chambers.
If there is a need for increase of return of the engine, secondary yokes are blocked through intermediate with primary special synchronizing pistons. Synchronizing pistons have a hydraulic drive with electronic control. When blocking yokes both inlet valves start to open in an identical mode, and degree and duration of their opening are defined by a form of a cam of an intermediate yoke and have the increased value.
Check of a condition of components
Electromagnetic valve of management of VTEC blocking
Proof-readers of klapanny gaps