SU1638590A1 - Device for thermal test of internal combustion engine - Google Patents

Abstract

The invention relates to mechanical engineering, serves to test internal combustion engines during their operation at various ambient temperatures and reduces the energy consumption during testing by using an air engine cooled in an engine cooling system. The device contains an operating temperature chamber made as a closed object, and additionally equipped with mixing and air distribution chambers. Air distribution chamber by means of adjustable section windows is connected with the working chamber, the atmosphere and the mixing chamber, in one of the walls of which an inlet window is made, and in the other - an opening for installing the fan casing. The change in the flow area of the windows is provided by means of dampers, which are connected to the actuator through the plugs, which can be activated manually or automatically, depending on the temperature of the air entering the working chamber 2 sludge. ; СЛ С о со 00 СЛ С о 9 8ft 4

Description

The invention relates to mechanical engineering, in particular to devices for testing internal combustion engines, namely, temperature chambers for testing air-cooled engines.

The purpose of the invention is to simplify the design of the device and reduce the energy consumption for testing by using the air heated in the engine cooling system.

FIG. 1 shows the proposed device, a general view; in fig. 2 - the mechanism for regulating the flow area of the windows.

The engine 1 is located in the working temperature chamber 2, made in the form of a closed volume that includes the air distribution 3 and air mixing 4 chambers. The air distribution chamber 3 is provided with windows 5-7, by means of which it communicates with the working chamber 2, the atmosphere and the mixing chamber 4. Inlet wall 8 of the mixing chamber 4 has an inlet port 9 connected to the atmosphere. In the partition 10 between the mixing 4 and the working 2 chambers, there is an opening for mounting the fan casing 11 of the engine under test 1. To adjust the flow area of the windows 5-9, the device is equipped with gates 12 (Fig. 2), which are driven from the actuator 13 through t 14. Operation of the actuator 13 is provided with a thermal control system (not shown), which gives a command to increase or decrease the window flow area depending on the temperature of the air entering the working chamber. The configuration of the working chamber at the place of installation of the engine can correspond to real conditions (real forms) of installation of the engine on the frame of the car or car frame.

The device works as follows.

When testing the engine, the air from the mixing chamber 4 is sucked in by the engine fan through the window in the partition 10 (through the casing 11). As a result of heat removal by the engine cooling system, the air heats up and enters the working chamber 2. Through the window 5, hot air from

The working chamber 2 enters the air distribution chamber 3, and from it through the window 7 - into the mixing chamber 4. In it, the hot air is mixed with atmospheric air coming in through the inlet window 9 if the air temperature exceeds the allowable one. As a result, the air temperature is reduced to the required value, and it re-enters to cool the engine 1. In the case when the temperature of the air entering the mixing chamber 4 is insufficient, the inlet port 9 is closed by the damper 12 and the air is not supplied from the atmosphere. Providing the necessary pace: the air is produced manually or

automatic adjustment of window sections 5-9 by means of flaps 12

The proposed device is simple in construction (can be made from cheap sheet materials) and can be

Easily mounted on almost any test bench.

Claims (1)

Apparatus for temperature testing an internal combustion engine, comprising a working temperature chamber with the engine under test, made in the form of a closed volume, characterized in that, in order to simplify the design and reduce energy consumption by using the air cooled in the cooling system, it additionally contains a partition mixing and air distribution chambers, and mixing the chamber is placed in an air distribution chamber separated from the working chamber by a partition and communicated by means of adjustable section windows with the working chamber, the atmosphere and the mixing chamber, in one of which walls there is a window for communication with the atmosphere and in the other a window for installing the fan casing of the engine under test . 12 12 FIG. 2