JPS59183017A - Lubricant feeding device of automobile engine - Google Patents

Abstract

PURPOSE:To improve remarkably the idling characteristic including fuel cost by providing an oil pump for circulating and feeding of a lubricant, also by providing a diffusion preventing passage on a lubricant return path. CONSTITUTION:An oil pump 6 is provided for circulating and feeding of a lubricant 4 in an oil pan 3 to each sliding part 2 of an automobile engine 1 via an oil filter 5. A diffusion preventing passage is provided at an intermediate location from each sliding part 2 to the oil pump 6 on an oil return path 7, then the diffusion of the lubricant in the oil pan 3 is prevented by the diffusion preventing passage until the lubricant temperature is raised up to the previous setting temperature. Thereby, the idling characteristic including fuel cost during a warming up operation stage after the engine starting can be remarkably improved.

Description

[Detailed Description of the Invention] Technical Field The present invention provides lubricating oil in the oil pan that is supplied directly to each sliding part of the engine during the period from cold start to warm-up of the engine. The present invention relates to a lubricating oil supply device for an automatic engine that increases the temperature of lubricating oil efficiently and in a short time to improve lubricity during cold startup.

Prior Art Conventionally, lubricating oil is supplied to each sliding part of an automobile engine by circulating the lubricating oil in the oil pan through an oil filter by operating an oil pump as the engine rotates. The viscosity of lubricating oil changes significantly between when the oil is cold and when it is warm, as shown in FIG. 1, for example.

In this case, the coefficient of friction fj due to rotating parts such as the crankshaft and crank pin of the engine is determined by the shape of the rjor bearing, etc. Constant: 0.002 fj1: Experimentally determined constant: 19.6 μm: The viscosity coefficient of the lubricating oil of the rotating parts 9°−
N: Rotation speed R0P, 8゜P: 9゜ for the pressure applied to the shaft? Then, fJ = fj O+ fj 1 (-)ψP Also, the friction coefficient fr due to the reciprocating motion of the piston is fro
: Constant value determined by the shape of the piston, etc. 0fr1 : Constant value determined experimentally 9.1L: Piston length m Cm: Sliding speed (-r average piston speed) m/8μ2 Lubricating oil viscosity coefficient of the piston part kg ° -, then f r z f r O+f r 1 ("-"-)2
P Therefore, the friction horsepower He of the engine is A: Friction horsepower of the rotating part B: Friction horse power of the piston part, flBoo5μm+Bμ22.

4 Here, the viscosity coefficients μm and μ2 of the lubricating oil in the piston part with the rotating part both greatly ash with temperature, as shown in Figure 1, and due to this change, friction increases during the process from cold start to warm-up of the engine. Horsepower also changes significantly, and the engine torque is relatively small and unstable during cold starting and frictional horsepower is especially large during the subsequent warm-up process, so the horsepower required for cold starting is also large. This may cause an increase in the amount of fuel required for the engine to complete warm-up and return to normal operation, resulting in poor fuel efficiency, or the engine may become more likely to run out during the warm-up process after startup, or the engine rotation may become hunting. The disadvantages are that the feeling of the car deteriorates, and that this countermeasure requires special equipment and electrical control circuits, which increases the price of the car.

Purpose of the Invention The present invention efficiently controls the temperature of the lubricating oil in the oil pan, especially the lubricating oil directly supplied to each sliding part of the engine, during the cold start and warm-up process of an automobile engine. It is an object of the present invention to provide a lubricating oil supply device for an automobile engine that increases the lubricant oil supply speed and in a short period of time, thereby significantly improving idling characteristics including fuel consumption during the warm-up process after startup.

Structure of the Invention As shown in FIG. 2, the present invention provides an oil pump 6 for circulating and supplying lubricating oil 4 in an oil pan 3 to each sliding portion 2 of an automobile engine 1 via an oil filter 5. At the same time, the lubricating oil 4 from the oil pan 3 is released from each sliding part 2 of the engine 1. ! This lubricating oil supply device for an automobile engine is provided with a diffusion prevention passage 8 for preventing lubricating oil 4 from scattering in an oil pan 5 until it reaches a preset temperature.

Embodiment FIG. 3 and the following are one embodiment 1j of the present invention, in which the lubricating oil 15 in the oil pan 14 is applied to each sliding part such as the crankshaft 12, crank, and cup pin 13 of an automobile engine 11 using relief pulp 16. On the lubricating oil circulation path 18, which circulates and supplies oil through the oil pump 17 while maintaining a constant pressure,
A temperature sensor 21 for detecting the temperature of oil filters 19 and 20 and lubricating oil 15 is attached, and an inlet vibrator 22 is connected to the lubricating oil supply path 18A from the oil filter 19 in the oil pan 14 to each sliding part of the engine 11. Heaters 23, 24, 25 for heating the lubricating oil 15 on the supply path 18A are installed at a position immediately before each sliding part, and a low temperature is installed at a position above the oil pan 14 on the lubricating oil return path 18B. When the oil pan 14 is warmed up and is at a high temperature, it is positioned as indicated by the solid line in FIG. Guide pulps 26 and 27 made of metal or a shape memory alloy that can be returned by a spring are installed between the specified position in the oil pan 14 and the oil filter 19, and the lubricating oil 1 that has been guided to the specified position is installed.
A collection pipe 28 is attached to the upper part of the collection pipe 28, which collects the oil and immediately returns it to the oil filter 19 position while avoiding mixing with the cold lubricating oil 15 in the oil pan 14. A bleed hole 29 is formed to prevent air from being drawn in when the surface is lowered and to guide relatively warm upper lubricating oil 15.

Each of the heaters 25, 24.25 installed on the lubricating oil supply path 18A in this way has the output voltage from the temperature sensor 21 output from the reference temperature setting device 30 set in accordance with the lubricating oil temperature immediately before completion of warm-up. The relay 52 is turned on by the output of the comparator 31 when the voltage is lower than the voltage, and power is supplied from the battery 33, and the relay is activated when the output voltage from the temperature sensor 21 becomes higher than the output voltage of the reference temperature setting device 30. 32 off.

The heaters 23, 24, 25 controlled in this way are
As shown in Figures to Figures 6, the main body case 34 is made of sheet metal.
The heater H1 or As shown in FIG. 7, a main body case 744 is constructed in which a cover body 46 is attached via a QIJ ring 42 to a die-cast aluminum body 41 with fins 4o integrally formed with piping ports 69 for lubricating oil inflow and outflow. The heater H2 has a heater body 46 attached to one side of the lubricating oil passage 45 between the pipe ports 59, or the heater body 46 is formed in a body case 747 formed with a sheet metal draw and solder as shown in FIGS. 8 and 9. Heater H5 has a heater main body 50 attached along a ring-shaped lubricating oil passage 49 between both pipe ports 48, or as shown in FIG. The heater H4 may include the heater body 54 and the temperature sensor 21, such as a positive temperature coefficient thermistor PTC, installed in series.

In addition, when each heater body 38, 46, 50, 54 is formed of a positive temperature coefficient thermistor PTC, P proportional to the temperature
By inputting the voltage due to the resistance change of the TC to the comparator 61, each heater body 38, 46, 50.54
can also serve as the temperature sensor 21, and the temperature sensor 21 may be installed inside the oil pan 14 instead of the lubricating oil supply path 18A to detect the temperature of the entire lubricating oil 15.

Next, the operation of this embodiment will be explained and explained.

In the lubricating oil supply device formed in this manner, when the engine 11 is cold started, the temperature of the lubricating oil 15 as well as the engine 11 is low, so that the guide valves 26 and 27 are also in the solid line state in FIG. When the engine 11 is started in this state, the output voltage of the temperature sensor 21 is low and the relay 32 is turned on, so power is supplied from the battery 53 to each heater 23, 24, 25 on the lubricating oil supply path 18A. At the same time, due to the operation of the oil pump 17 due to the rotation of the engine, the internal lubricant 15 of the oil pan 14 is supplied to the engine 1.
1 is supplied to each sliding section.

At this time, the T in the oil pan 14! 8. Oil 15 The temperature is low and the viscosity is extremely high compared to normal operation. If this highly viscous lubricating oil 15 is supplied as it is to each sliding part, the friction horsepower will increase as described in the conventional embodiment. However, in the case of the present invention, the highly viscous lubricating oil 15 in the oil pan 14 is supplied to each moving part through the lubricating oil supply path 18A. Each heater 25, 24, 25 on the lubricating oil supply path 18A
Since the lubricating oil is heated and its viscosity becomes lower, even if the temperature of the lubricating oil 15 in the engine 11 and oil pan 14 is low in the warm-up state immediately after a cold start, the lubricating oil is supplied to each sliding part of the engine 11. The viscosity of engine 15 is low, and the engine 11 hardly loses its output due to frictional horsepower, so it operates smoothly without changing from the normal operating state after warming up. In addition to improving the 74-ring performance of the automobile during driving, the warm-up time is also shortened.

Moreover, in the case of this embodiment, the lubricating oil 15 heated by the heaters 25, 24° 25 passes from the guide pulp 26, 27 through the collection pipe 28 to the engine 11 without mixing with the cold lubricating oil 15 in the oil pan 14. Since it is supplied to each sliding part while being reheated, the thermal efficiency is extremely high, and the temperature of the $I lubricating oil 15 circulating in the lubricating oil circulation path 18 reaches a preset appropriate temperature in a short time. At this point, the output of the comparison i31 is reversed and each heater 23, 24, 25 is turned off together with the relay 32, but after that, the temperature rises due to the friction of the engine 11 and each sliding part itself, and only the heated lubricating oil 15. By recirculating the lubricating oil 1
5 maintains an appropriate temperature even after the heaters 23, 24, and 25 are turned off, and furthermore, at the end of the warm-up operation, each guide valve 26, 27 is also deformed due to the temperature rise and is displaced to the state shown by the dotted line in FIG. 15 lubricating oils are circulated in an oil pan 14 while being cooled and maintained at an appropriate temperature.

Also, in this embodiment, even if the heaters 23, 24, 25 are omitted and only the guide valves 26, 27 and the collecting pipe 28 are used, the lubricating oil can be recirculated only by the lubricating oil 15 heated by the frictional heat of each sliding part. In addition to being able to quickly raise the temperature of heaters 23, 24, and 25, the guide valves 26, 27, and collection pipes 28 can be omitted, and the number, position, shape, etc. of heaters 23, 24, and 25 can be reduced. can be arbitrarily set depending on the size and type of the engine 11, the type of vehicle, etc.

Effects of the Invention The present invention provides lubricating oil in the oil pan that is directly supplied to each sliding part of the engine during the period from cold start to warm-up of an automobile engine. I? By raising the temperature of lt oil efficiently and in a short time,
This has the effect of significantly improving idling characteristics including fuel consumption during the warm-up process after startup.

[Brief explanation of the drawing]

FIG. 1 is a temperature-viscosity characteristic diagram of lubricating oil, FIG. 2 is an explanatory diagram showing the configuration of the present invention, FIG. 5 is a sectional view of a road body according to an embodiment of the present invention, and FIG. 5 is a bottom view, FIG. 6 is a cutaway side view, FIG. 7 is a cutaway side view of heater H2, FIG. 8 is a cutaway front view of heater H5, and FIG. 9 is a front view of heater H1. is its bottom view, and Figure 10 is its heater H.
FIG. 4 is a cutaway front view of No. 4. 1... Engine 2... Sliding part 6... Oil pan 4... Lubricating oil 5... Oil filter 6... Oil pump 7... Lubricating oil return path 8... Diffusion prevention Passage applicant Aisan Kogyo Co., Ltd. Agent Patent attorney Oka 1) Hidehiko Ougi 4 t:□t 36 Figure 5± ＼ Figure 6 6

Claims (1)

[Claims] An oil pump is installed to circulate the lubricating oil in the oil pan via an oil filter to each sliding part of the automobile engine, and the lubricating oil from the oil pan is also sent to each sliding part of the engine at the oil pump position. A diffusion prevention passage is provided on the lubricating oil return path until the lubricating oil returns to the lubricating oil return path to prevent the lubricating oil passing through the lubricating oil return path from scattering in the oil pan until the lubricating oil reaches a preset temperature. A lubricating oil supply device for automobile engines.