JPS6115261Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an engine starting assist device used when starting an engine in extremely cold regions.

For example, as shown in Fig. 1, a conventional engine starting auxiliary device of this type includes a water boiling section of a combustion type heater f and a hot water heater i for heating the cabin in parallel in a cooling water system b of an engine a. There is an intervening configuration. In Fig. 1, c is the outlet on the downstream side of cooling water system b, d and g are circuits, h is the inlet on the upstream side of cooling water system b, e is the auxiliary water pump,
j is a heating tank, k is a fuel pump, l is a battery, and m is a main switch.

However, with this structure, when starting the engine, the operator must manually ignite the combustion type engine coolant preheater f, which takes time until the engine can be started, and only the engine block can be heated, making it possible to start the engine. The disadvantage was that it required a long heating time.

The present invention was developed in consideration of the above points, and the heater can be started automatically at a predetermined time using a timer, and at the same time, the oil pan can also be heated by the heater's exhaust gas. This allows the operator to start the engine immediately after getting into the vehicle, and also makes effective use of the heat generated by the heater.In particular, it is possible to directly heat the lubricating oil in the oil pan and start the engine in a short time. An object of the present invention is to provide an engine starting auxiliary device that can be brought into a startable state.

Embodiments of the present invention will be described below with reference to FIG. 2 and subsequent figures.

The downstream outlet 3 of the cooling water system 2 of the engine 1 is
It is connected to the inlet 5a of the auxiliary water pump 5 via the first pipe 4, and from the outlet 5b of the auxiliary water pump 5 to the water heater of the combustion type heater (engine coolant preheating heater) 6 mounted on the vehicle. 2 is connected to an upstream inlet 8 of the cooling water system 2 via a pipe 7.

The heater 6 has a main body 9 provided with a glow plug 10, a temperature sensor 11, a fuel nozzle 12, and a combustion blower 13. The combustion blower 13 is directly connected to a motor 14 and a fuel pump 15. The fuel tank 16 supplies fuel to the fuel nozzle 12, the power supply 17 is connected to a timer 19 and a pressure switch 20 via a main switch 18, and the timer 19 is connected in parallel to the glow plug 10 and temperature sensor 11. Temperature sensor 11
The motor 14 and the water pump 5 are connected to each other.

A hot water heater 23 for heating the inside of the cabin is connected to the first and second pipes 4 and 7 via first and second auxiliary pipes 21 and 22. First and second solenoid valves 24 and 25 are provided at a position closer to the heater 6 than the conduit 21 and to the second auxiliary conduit 22, and the first solenoid valve 24 is always in the communicating position and the solenoid 24a is energized. When the solenoid 25a is energized, the second solenoid valve 25 is always in the cutoff position C, and when the solenoid 25a is energized, it is in the communication position N.
4a and 25a are connected to the first and second contacts 20 ₁ and 20 ₂ of the pressure switch 20.

The pressure switch 20 is configured such that the second contact ₂₀₂ is always energized, and the first contact ₂₀₁ is energized when the lubricating oil pressure in the engine 1 exceeds a certain pressure.

The oil pan 1a of the engine 1 is connected to the duct 26.
The inlet 26a thereof is connected to the exhaust port 6a of the heater 6. Also duct 2
The outlet 26b of No. 6 is opened in front of the radiator 27.

Then, the main switch 18 is turned on and the timer 19 is preset to a predetermined time slightly before the time when the engine is started. When a predetermined time has elapsed, the timer 19 is activated and the glow plug 10 is energized and becomes red hot. When a predetermined red-hot temperature is detected by the temperature sensor 11, the motor 14 and the fuel pump 15 are energized and fuel is injected from the fuel nozzle 12 and ignited. At the same time, the water pump 5 is also activated to heat and raise the temperature of the cooling water in the engine 1. to warm up engine 1.

At this time, since the second solenoid valve 25 is in the cutoff position C, hot water does not flow to the hot water heater 23, and the hot water heated and heated by the heater 6 is supplied only to the engine 1, so that the engine 1 can be heated efficiently. Therefore, the thermal efficiency of the heater 6 can be improved.

Further, at this time, while exhaust gas from the heater 6 is discharged through a duct 26 provided surrounding the oil pan 1a, the oil pan 1a is heated to raise the temperature of the engine lubricating oil.

In this way, the engine 1 is started in a state where the engine 1 and the lubricating oil are heated to a state where the engine can be started.

When the engine 1 is started and the pressure of the engine lubricating oil exceeds a predetermined pressure, the pressure switch 20 is switched and the first contact 201 is energized, so the first solenoid valve 24 is in the cutoff position _B and the second solenoid valve 25 is in the cutoff position B. The communication position is 2.

In the above embodiment, if the engine start time is delayed due to reasons such as the operator not arriving on time, and the heater combustion time becomes longer, the overheating prevention circuit (not shown) of the heater 6 and the engine 1 The heater 6 is automatically stopped by matching with a proper circuit (duct, water circuit). Further, the combustion of the heater 6 may be stopped manually or automatically when the combustion of the heater 6 is no longer necessary after the engine is started.

Since the present invention is constructed as described above, the heater 6
can be started automatically at a predetermined time using the timer 19, and at the same time, the oil pan 1a can also be heated by the exhaust air from the heater 6. Not only can the engine be started immediately, but also the amount of heat generated by the heater 6 can be effectively used, and in particular, the lubricating oil in the oil pan 1a is directly heated to raise its temperature, so that the engine can be started in a short time. Can be done. Furthermore, when the engine is started, hot water does not flow through the hot water heater 23, and the hot water heated and heated by the heater 6 can be supplied only to the engine 1, so that the engine 1 can be heated efficiently.
The thermal efficiency of the heater 6 can be improved.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of a conventional example, and FIG. 2 is an explanatory diagram showing an embodiment of the present invention. 1 is the engine, 1a is the oil pan, 2 is the cooling water system, 6 is the heater, 6c is the exhaust port, 19 is the timer, and 26 is the duct.

Claims (1)

[Scope of utility model registration request] In an engine starting auxiliary device in which a water boiling part of a combustion type heater 6 and a hot water heater 23 for heating the inside of the cabin are installed in parallel in a cooling water system 2 of an engine 1, the oil pan 1a of the engine 1 surrounds this. A duct 26 is provided, the exhaust port 6a of the heater 6 is connected to the duct 26, and a starting control mechanism including a timer 19 for automatically starting the heater 6 is connected to the duct 26. A normally open solenoid valve 24 is installed in the circulation circuit that passes through the water boiler, and a normally closed solenoid valve 25 is installed in the circulation circuit that passes through the hot water heater 23 for heating the inside of the cabin. A pressure switch 20 is provided which switches from the second contact ₂₀₂ to the first contact 201 when the pressure exceeds a certain level, and the first contact ₂₀₁ of the pressure switch ₂₀ is connected to the normally open solenoid valve 24. The second contact 20 is connected to the solenoid 24a of
₂ is connected to a solenoid 25a of a normally closed electromagnetic valve 25.