TH35472A - Oil supply for two-stroke engines - Google Patents

Abstract

DC60 (21/10/40) To minimize electrical wiring, to make the device compact and low-cost, and to simplify electrical wiring routing, and to facilitate easy installation on various types of drives or engines, such as on motorcycles. A lubrication system for a two-stroke engine that drives an oil pump 13 to supply lubrication from the oil tank 14 to various areas 15 of the engine, which has an electrically driven solenoid coil 13 installed, which drives the oil pump 13. A control unit 11 controls the opening/closing of the solenoid coil 12 depending on the operating conditions of the engine. The solenoid coil 12 and the oil pump 13 are integrated into a single unit within a casing 30 to minimize electrical wiring, to make the device compact and low-cost, and to simplify electrical wiring routing, and to facilitate easy installation on various types of drives or engines, such as on motorcycles. A lubrication system for a two-stroke engine that drives an oil pump 13 to supply lubrication. The solenoid valve 14 slides from the fuel tank to various areas 13 where it is installed. This drives the fuel pump 13. Control unit 11 controls the opening/closing of the solenoid coil 12 depending on the operating conditions of the engine. The solenoid coil 12 and the fuel pump 13 are integrated into a single unit within a housing 30.

Claims (1)

1. A lubrication device for a two-stroke engine that uses an oil pump to supply lubricating oil from the oil tank to various areas of the engine. This lubrication device for a two-stroke engine is specially designed by incorporating an electrically driven solenoid coil to drive the aforementioned oil pump. A control unit electronically controls the solenoid-driven oil pump according to the engine's operating conditions, and a housing encloses and integrates the solenoid coil and the oil pump into a single unit. Claim 2: The lubrication device for a two-stroke engine, as described in Claim 1, is specially designed by incorporating a housing made of thin-walled tubing in which the pump unit, comprising the integrated oil pump, the solenoid coil, the control unit, and the separator, are sequentially inserted into openings on one side of the housing. The assemblies are sealed at both ends of this housing, and the control unit... The above is sealed by spraying of resin. Claim 3: Lubrication device for two-stroke engines according to Claim 1 and 2, which is characterized by the base plate of the aforementioned control unit being connected to the aforementioned electromagnetic solenoid coil, and by a component consisting of its circuit and an external coupling mounted on the opposite side of the base plate from the electromagnetic solenoid coil. Claim 4: Lubrication device for two-stroke engines according to Claim 1 to 4, which is characterized by the aforementioned control unit having a power input unit which receives a full-wave rectified DC fed from the front stage of the regulator which receives AC power from the engine drive; a signal input mechanism which takes one input signal from the aforementioned full-wave rectifier mechanism; an RPM calculation mechanism which calculates the engine RPM from the input signal; and a pump control signal output mechanism which outputs a control signal to control the aforementioned oil pump which depends on the engine RPM. Claim 5: Lubrication device for two-stroke engines. According to claims 1 through 4, which are characterized by the aforementioned control unit, which has a power supply unit receiving DC power from the rear stage of the controller, which receives AC power from the engine drive; a signal input mechanism that reads the input signal from the primary side of the engine ignition coil; an RPM calculation mechanism that calculates the engine RPM from this primary input signal; a pump control signal output mechanism that releases a control signal to control the aforementioned oil pump, which is dependent on the engine RPM; and a spark interruption mechanism that interrupts the output from the primary side of the ignition coil when a fault is detected (Clause 5, page 2, figure 7).