摘要:
An internal combustion engine comprising main and subsidiary combustion chambers interconnected by a connecting passage. A subsidiary chamber component providing therein the subsidiary combustion chamber is press-fitted into a recess formed in the cylinder head. The cylinder head and the component have a hole extending through their walls. A sleeve is fitted into the hole so as to prevent dislodging of the sleeve from the recess. A spark plug is inserted into the sleeve.
摘要:
A mold is designed by calculating a distribution of a contact surface pressure of a mating surface of a mold under a casting condition, and setting a machining amount of the mating surface of the mold based on the calculated distribution of the contact surface pressure.
摘要:
An object of the present invention is to improve the easiness of steadily maintaining the magnitude of treading on a foot-operated operating element while mitigating a feeling of treading on a wall at the time of start of treading on the operating element. A pedal-operated operation device includes a pedal arm, a support housing, a spring for urging the pedal arm in a direction of return, a first shim and a second shim. A frictional engagement portion of the second shim is higher in maximum static friction force than a frictional engagement portion of the first shim. The second shim has a region in which the elastic modulus of the second elastic deformation portion is lower than that of the first shim, in terms of elastic deformation at the time when the pedal arm moves relative to the support housing.
摘要:
In addition to a first transmitter circuit, a plurality of transmission lines and a first data processing circuit in the receive side, so as to cause a DLL circuit to be regulated that regulates timing of a sampling clock of the data signal, a second first transmitter circuit, a transmission line and a second data processing circuit are provided, when a second specific signal string is sent, a regulation start signal string is caused to be distributed by the second data processing circuit, regulation is caused to be made for a DLL circuit of the first data processing circuit by a regulation signal string, the data starting with the bit next to a first specific signal string detected in the data signal is written into a m-address n-bit FIFO circuit, simultaneously a read address synchronized with a system clock is generated from a third specific signal string that came to the second data processing circuit, whereby the data is recovered.
摘要:
An engine comprising a spark plug and a fuel injector in a combustion chamber and a temperature sensor used to judge if the gas temperature in the combustion chamber is a temperature at which self-ignition occurs when a spark is generated. Based on this judgement, a valve timing device is used to control the opening timing of the intake valve and maintain the gas temperature at a temperature at which self-ignition occurs when a spark is generated.
摘要:
An internal combustion engine in which a three-way catalyst (12) for purification of the exhaust gas is arranged in the exhaust passage, wherein the relationship between the magnitude of the stress causing deterioration of the three-way catalyst (12), for example the catalytic bed temperature, and the rate of deterioration of the performance of the catalyst is found. A durability test is performed by raising the catalytic bed temperature higher than that of the vehicle under market driving. The length of the durability test at this time is determined from the relationship between the catalytic bed temperature and the rate of deterioration of the performance of the catalyst so as to give the same degree of deterioration of the performance of the catalyst as with market driving. The length of the durability test required for giving the same degree of deterioration of the performance of the catalyst is much shorter than the market driving time.
摘要:
A device for evaluating catalyst performance deterioration includes an air-fuel ratio sensor and a temperature sensor. The degree of catalyst performance deterioration per unit time is calculated based on the concentration of oxygen in the exhaust gas and the temperature of the catalyst. The deterioration of the catalyst is evaluated on the basis of the accumulated value of the degree of catalyst performance deterioration per unit time.
摘要:
A two-stroke engine having an intake valve and an exhaust valve arranged on an inner wall of the cylinder head, an intake passage connected to the cylinder via the intake valve, a fuel injection device arranged in the cylinder, for injecting fuel into the cylinder, a pressure regulator for regulating a fuel pressure supplied to the fuel injection device on the basis of a scavenging pressure in the intake passage, to thereby increase the fuel pressure in accordance with an increase of the scavenging pressure, and a control device for controlling the injection of fuel by the fuel injection device for a time ranging from a time at which the intake valve is opened to a time at which the scavenging pressure becomes equal to a pressure in the cylinder after the intake valve is closed.
摘要:
A cooling system for an internal combustion engine with an intercooler has a pump with a single drive shaft which drives two sets of vanes. One set of vanes circulates coolant through a circuit including the engine block, and the other circulates fluid through a circuit including the intercooler. Around the rotary impeller of the pump is a clearance to allow communication between the circuits. Thus, the intercooler can function as an intake air heater when cold-starting the engine, idling without supercharging, or operating the engine in the region of low engine rpm's.
摘要:
In a double air-fuel ratio sensor system including two air-fuel ratio sensors upstream and downstream of a catalyst converter provided in an exhaust passage, the actual air-fuel ratio is adjusted in accordance with an air-fuel ratio correction amount calculated by using the output of the upstream-side air-fuel ratio sensor and an air-fuel ratio feedback control parameter such as delay time periods, skip amounts, or integration amounts calculated by using the output of the downstream-side air-fuel ratio sensor, and the calculation of the air-fuel ratio feedback control parameter is prohibited when the downstream-side air-fuel ratio sensor is in an abnormal state.