CN2508017Y

CN2508017Y - Hall effect contactless distributor

Info

Publication number: CN2508017Y
Application number: CN 01273755
Authority: CN
Inventors: 马新兴
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-12-27
Filing date: 2001-12-27
Publication date: 2002-08-28
Anticipated expiration: 2011-12-27

Abstract

The utility model relates to a Hall Effect typed non-contact distributor which comprises a distributor, a Hall Effect typed firing signal generator, a vacuum advance mechanism and a centrifugal spark advance device. The Hall Effect typed firing signal generator is constituted by two parts of a trigger cam and a hall sensor, wherein the trigger cam is composed of a metal wheel body with permanent magnet homogeneous distributed around the metal wheel body. The number of permanent magnets is the same to the number of cylinder of the engine. The magnet pole direction of every magnet is the same. The sensor is constituted by a circuit wafer and hall device arranged on the circuit wafer and the sensor is arranged under the trigger cam by a crust. The distributor block which is simple in structure and low in cost is an important part of a gasoline locomotive ignition system. The structure of Hall Effect typed firing signal generator is compatible with the traditional contact-making distributor block, so the output signal is stable and can guarantee the firing time accurate.

Description

The hall effect type breakerless distributor

Technical field

The utility model belongs to the automotive ignition system technical field, promptly a kind of hall effect type breakerless distributor.

Technical background

Distributor occupies important position in automotive ignition system, the Ignition signal generator in traditional chattering type distributor, i.e. mechanical contact-type Ignition signal generator; The non-contact electronic ignition signal generator, it is non-mechanical.On-mechanical formula Ignition signal generator can be a various ways, but obtains only four kinds of extensive use: magnetic induction type, hall effect type, photoelectric effect formula, electromagnetic oscillations formula, wherein magnetic induction type, hall effect type are most widely used, and other are comparatively rare.

The shortcoming of magnetic induction type Ignition signal generator is: 1, complex structure, inductor coil are wherein wanted manual coiling, can not mechanization production, and the cost height; 2, the signal amplitude of inductor coil output is very big with the distributor rotation speed change, and sometimes from 0.5～100V, this requires very high to the igniter input circuit, just increased cost undoubtedly; 3, distributor shaft turns round for a long time, and wearing and tearing are arranged unavoidably.Wearing and tearing will cause that the warp-wise that triggers wheel rocks, so the signal Zero Crossing Point of inductor coil output drifts about with regard to front and back, cause the performance that firing time is inaccurate, influence motor.

The deficiency of hall effect type Ignition signal generator is at present: since incompatible on the mechanical structure with traditional distributor, make its complex structural designs, be difficult to make the cost height; In addition, also have the wearing and tearing because of distributor shaft to influence the output signal quality, then the distributor functional reliability is poor.

Summary of the invention

The purpose of this utility model is in order to overcome deficiency of the prior art, a kind of hall effect type breakerless distributor is provided, it is mainly by the improvement to hall effect type Ignition signal generator in original technology, make distributor simple in structure, output signal is stable, guarantees the stable of firing time simultaneously.

The utility model is realized with following technical proposal: this hall effect type breakerless distributor comprises distributor, hall effect type Ignition signal generator is thereunder arranged, one side of Ignition signal generator has vacuum advance mechanism, there is centrifugal advance mechanism the below of Ignition signal generator, they connect and compose by a main shaft, described hall effect type Ignition signal generator is to be made of a triggering wheel and Hall transducer two-part, wherein triggering wheel is the circular metal wheel body that is sleeved on the distributor main shaft by, and be inlaid with permanent magnet and constitute evenly distributing in one week, the number of permanent magnet is identical with the cylinder number of motor, the pole orientation unanimity of every magnet; Hall transducer is to be made of circuit board and the hall device that is welded on circuit board, and this sensor places the below of triggering wheel by a metal shell.It can be cylindrical triggering the shape of taking turns the every permanent magnet of inlaying in a week, also can be the cambered surface body; Pole orientation can be axially, also can be along the circular arc direction.Described hall device refers to CS3000 or SS400 series.

This hall effect type breakerless distributor, compatible on the structure with traditional distributor that the contact is arranged, it have simple in structure, produce easily, cost is low; Output signal is stable, is not subjected to distributor rotating speed, ambient temperature, humidity, effect of dust; The stability of period of output signal be not subjected to distributor shaft wearing and tearing influence, guarantee the advantage such as accurate of firing time.

Description of drawings

Following accompanying drawing has provided embodiment of the present utility model:

Fig. 1 is the utility model overall structure schematic representation.

Fig. 2 is for triggering the wheel construction schematic representation.

Fig. 3 is for triggering two kinds of structural representations of permanent magnet in the wheel.

Fig. 4 is the Hall transducer structural representation.

Fig. 5 is a Hall transducer circuit board schematic representation.

Fig. 6 is a Hall effect Ignition signal generator signal schematic representation.

Embodiment

In conjunction with the accompanying drawings integrally-built formation of the present utility model and working principle thereof are elaborated.As shown in Figure 1: at first explanation is that Fig. 1 is the distributor cap of this hall effect type breakerless distributor and the overall structure schematic representation of distributor main body disengaged condition.It is made up of four parts altogether, it is distributor 1 (referring to distributor cap and split fire head sum total), thereunder having under the right side vacuum advance mechanism 3, Ignition signal generator 2 of hall effect type Ignition signal generator 2, Ignition signal generator 2 is centrifugal advance mechanism 4, and they constitute one by connecting main shaft 10.Wherein distributor 1, vacuum advance mechanism 3, advance mechanism 4 are the prior art structure fully, and hall effect type Ignition signal generator 2 is feature technology parts of this distributor.The integral body formation that is to say this hall effect type breakerless distributor is that traditional platinum contact assembly on the distributor of contact that has is removed, and changes the outfit and goes up the design's hall effect type Ignition signal generator 2, and other structures are constant.Described hall effect type Ignition signal generator 2 is to constitute by triggering wheel and Hall transducer two-part, wherein triggering wheel goes up by the circular metal wheel body 5 that is sleeved on the distributor main shaft, and be inlaid with permanent magnet 6 and constitute evenly distributing in one week, the number of permanent magnet is identical with the cylinder number of motor, the pole orientation unanimity of every permanent magnet.As shown in Figure 3: described permanent magnet 6 has two kinds of bodies, and the first is cylindrical, and it two is cambered surface bodies, and the cylindrical magnet magnetic pole is above-below direction (vertically), and promptly the upper end is " S " utmost point, and the lower end is " N " utmost point; The arc surfaced magnet poles is that left and right directions (along the circular arc direction) is that the left side is " S " utmost point, and the right is " N " utmost point.For triggering wheel drive fit is sleeved on the distributor shaft, increase the elastic structure 7 of circle at the center of triggering wheel body.As shown in Figure 4, wherein Hall transducer mainly by two-sided copper foil circuit board 8, be welded on this circuit board hall device (CS3000) and constitute with the supporting metal shell of circuit board 8.Referring to Fig. 5, circuit board 8 is thick one millimeter copper-clad plates, and the front is printed with the pattern of CS3000 integrated package that can be welded, and three lighting outlets are arranged, and wherein one is power input line, and it is to be provided by ignition; Another root is a ground wire, also is to link with the igniter ground wire; The 3rd is the signal lighting outlet, for igniter provides Ignition signal.Circuit board 8 embeds in the groove of metal shell 9.Metal shell 9 one ends have fixed hole, and the other end has the eccentric opening of adjustable position, can be sleeved on the platinum movable contact arm pillar on traditional distributor mobile plate.

Assembling of the present utility model: at first open original distributor cap 12, take off split fire head 11, remove former platinum contact assembly.Hall transducer is fixed on original platinum contact holder position, regulates the screw on the eccentric opening, make its position suitable, and with the screw on the other end fixed hole.Round and elastic structure 7 packed into trigger in the wheel, and the card base of round and elastic structure 7 both sides is stuck in trigger in the inboard corresponding groove of wheel, the triggering wheel that part 7 will be housed then is sleeved on the distributor main shaft 10.Press split fire head, cover distributor cap, other parts and the traditional corresponding part of contact type distributor are identical.So traditional contact type distributor is just changed system into a high-performance hall effect type breakerless distributor easily.

The working principle of distributor: referring to " I "---initial current among Fig. 6, the figure; " U _G---signal voltage; " " U _H"-Hall voltage; " B "---magnetic intensity; 13---permanent magnet; 14---nonmagnetic body.Work as engine start, when driving the distributor rotation, the triggering wheel of hall effect type Ignition signal generator is being with permanent magnet also to rotate, when hall device top magnetic intensity reaches B1, Hall voltage is enough high, Hall transducer output low level (about 0.5V) is when magnet leaves hall device; When magnetic intensity was attenuated to B2, Hall voltage was enough low, and sensor output high level (can be 2 ^V, 5 ^V, 8 ^VOr 12 ^V), so along with the distributor rotation, Ignition signal generator output height is level alternately.This signal produces the high voltage ignition signal as the input signal of ignition through respective handling, makes the motor proper functioning.

Claims

1, a kind of hall effect type breakerless distributor, it comprises distributor (1), hall effect type Ignition signal generator (2) is thereunder arranged, one side of Ignition signal generator (2) has vacuum advance mechanism (3), there is centrifugal advance mechanism (4) below of Ignition signal generator (2), they connect and compose by a main shaft, it is characterized in that described hall effect type Ignition signal generator (2) is to be made of a triggering wheel and Hall transducer two-part, wherein triggering wheel is the circular metal wheel body (5) that is sleeved on the distributor main shaft by, and be inlaid with permanent magnet (6) and constitute evenly distributing in one week, the number of permanent magnet is identical with the cylinder number of motor, the pole orientation unanimity of every magnet (6); Hall transducer is to be made of circuit board (8) and the hall device that is welded on circuit board, and this sensor places by a metal shell (9) and triggers the below of taking turns.

2, hall effect type breakerless distributor according to claim 1 is characterized in that it can be cylindrical triggering the shape of taking turns the every permanent magnet of inlaying in a week (6), also can be the cambered surface body; Pole orientation can be axially, also can be along the circular arc direction.

3, hall effect type breakerless distributor according to claim 1 is characterized in that described hall device refers to CS3000 or SS4400 series.